/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-more-array-sum-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 23:11:42,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 23:11:42,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 23:11:42,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 23:11:42,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 23:11:42,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 23:11:42,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 23:11:42,710 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 23:11:42,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 23:11:42,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 23:11:42,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 23:11:42,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 23:11:42,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 23:11:42,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 23:11:42,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 23:11:42,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 23:11:42,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 23:11:42,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 23:11:42,727 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 23:11:42,728 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 23:11:42,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 23:11:42,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 23:11:42,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 23:11:42,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 23:11:42,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 23:11:42,749 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 23:11:42,750 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 23:11:42,750 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 23:11:42,751 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 23:11:42,753 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 23:11:42,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 23:11:42,756 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 23:11:42,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 23:11:42,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 23:11:42,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 23:11:42,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 23:11:42,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 23:11:42,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 23:11:42,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 23:11:42,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 23:11:42,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 23:11:42,764 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 23:11:42,793 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 23:11:42,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 23:11:42,794 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 23:11:42,794 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 23:11:42,795 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 23:11:42,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 23:11:42,796 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 23:11:42,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 23:11:42,796 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 23:11:42,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 23:11:42,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 23:11:42,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 23:11:42,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 23:11:42,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 23:11:42,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 23:11:42,798 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 23:11:42,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 23:11:42,798 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 23:11:42,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 23:11:42,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 23:11:42,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 23:11:42,799 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 23:11:42,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 23:11:42,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 23:11:42,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 23:11:42,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 23:11:42,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 23:11:42,800 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 23:11:42,800 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 23:11:42,800 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 23:11:42,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Size reduction to apply after Petri net difference -> REMOVE_DEAD [2022-12-12 23:11:43,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 23:11:43,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 23:11:43,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 23:11:43,131 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 23:11:43,132 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 23:11:43,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2022-12-12 23:11:44,192 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 23:11:44,405 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 23:11:44,405 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2022-12-12 23:11:44,413 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ce2c1593/c17cc4b1219949d5a373e862e84e372b/FLAGcfe750d55 [2022-12-12 23:11:44,425 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ce2c1593/c17cc4b1219949d5a373e862e84e372b [2022-12-12 23:11:44,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 23:11:44,430 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 23:11:44,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 23:11:44,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 23:11:44,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 23:11:44,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 11:11:44" (1/1) ... [2022-12-12 23:11:44,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60e0520 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:44, skipping insertion in model container [2022-12-12 23:11:44,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 11:11:44" (1/1) ... [2022-12-12 23:11:44,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 23:11:44,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 23:11:44,617 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:11:44,620 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:11:44,624 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:11:44,625 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:11:44,626 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:11:44,627 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:11:44,645 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-more-array-sum-alt2.wvr.c[2525,2538] [2022-12-12 23:11:44,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 23:11:44,672 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 23:11:44,689 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:11:44,690 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:11:44,692 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:11:44,694 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:11:44,695 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 23:11:44,697 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 23:11:44,711 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-more-array-sum-alt2.wvr.c[2525,2538] [2022-12-12 23:11:44,715 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 23:11:44,728 INFO L208 MainTranslator]: Completed translation [2022-12-12 23:11:44,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:44 WrapperNode [2022-12-12 23:11:44,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 23:11:44,731 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 23:11:44,731 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 23:11:44,731 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 23:11:44,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:44" (1/1) ... [2022-12-12 23:11:44,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:44" (1/1) ... [2022-12-12 23:11:44,788 INFO L138 Inliner]: procedures = 25, calls = 45, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 191 [2022-12-12 23:11:44,788 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 23:11:44,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 23:11:44,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 23:11:44,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 23:11:44,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:44" (1/1) ... [2022-12-12 23:11:44,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:44" (1/1) ... [2022-12-12 23:11:44,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:44" (1/1) ... [2022-12-12 23:11:44,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:44" (1/1) ... [2022-12-12 23:11:44,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:44" (1/1) ... [2022-12-12 23:11:44,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:44" (1/1) ... [2022-12-12 23:11:44,824 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:44" (1/1) ... [2022-12-12 23:11:44,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:44" (1/1) ... [2022-12-12 23:11:44,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 23:11:44,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 23:11:44,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 23:11:44,838 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 23:11:44,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:44" (1/1) ... [2022-12-12 23:11:44,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 23:11:44,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:11:44,872 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 23:11:44,897 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 23:11:44,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 23:11:44,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 23:11:44,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 23:11:44,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 23:11:44,910 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 23:11:44,910 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 23:11:44,910 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 23:11:44,911 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 23:11:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-12 23:11:44,911 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-12 23:11:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 23:11:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 23:11:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 23:11:44,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 23:11:44,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 23:11:44,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 23:11:44,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 23:11:44,913 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 23:11:45,065 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 23:11:45,081 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 23:11:45,316 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 23:11:45,433 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 23:11:45,433 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-12 23:11:45,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 11:11:45 BoogieIcfgContainer [2022-12-12 23:11:45,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 23:11:45,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 23:11:45,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 23:11:45,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 23:11:45,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 11:11:44" (1/3) ... [2022-12-12 23:11:45,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38a5b13d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 11:11:45, skipping insertion in model container [2022-12-12 23:11:45,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:11:44" (2/3) ... [2022-12-12 23:11:45,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38a5b13d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 11:11:45, skipping insertion in model container [2022-12-12 23:11:45,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 11:11:45" (3/3) ... [2022-12-12 23:11:45,442 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2022-12-12 23:11:45,457 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 23:11:45,458 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 23:11:45,458 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 23:11:45,543 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-12 23:11:45,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 141 transitions, 306 flow [2022-12-12 23:11:45,666 INFO L130 PetriNetUnfolder]: 12/138 cut-off events. [2022-12-12 23:11:45,666 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 23:11:45,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 138 events. 12/138 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 90 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2022-12-12 23:11:45,672 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 141 transitions, 306 flow [2022-12-12 23:11:45,679 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 128 transitions, 274 flow [2022-12-12 23:11:45,681 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 23:11:45,710 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 128 transitions, 274 flow [2022-12-12 23:11:45,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 128 transitions, 274 flow [2022-12-12 23:11:45,774 INFO L130 PetriNetUnfolder]: 12/128 cut-off events. [2022-12-12 23:11:45,774 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 23:11:45,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 128 events. 12/128 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 89 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2022-12-12 23:11:45,778 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 128 transitions, 274 flow [2022-12-12 23:11:45,778 INFO L226 LiptonReduction]: Number of co-enabled transitions 1320 [2022-12-12 23:11:50,654 INFO L241 LiptonReduction]: Total number of compositions: 104 [2022-12-12 23:11:50,666 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 23:11:50,671 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;@7b992604, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 23:11:50,671 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-12 23:11:50,676 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2022-12-12 23:11:50,677 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 23:11:50,677 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:50,677 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:50,678 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:50,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:50,681 INFO L85 PathProgramCache]: Analyzing trace with hash 192526010, now seen corresponding path program 1 times [2022-12-12 23:11:50,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:50,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240932067] [2022-12-12 23:11:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:50,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:51,034 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 23:11:51,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:51,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240932067] [2022-12-12 23:11:51,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240932067] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:11:51,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:11:51,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-12 23:11:51,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394568643] [2022-12-12 23:11:51,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:11:51,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 23:11:51,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:51,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 23:11:51,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 23:11:51,060 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2022-12-12 23:11:51,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 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 23:11:51,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:51,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2022-12-12 23:11:51,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:51,199 INFO L130 PetriNetUnfolder]: 360/508 cut-off events. [2022-12-12 23:11:51,199 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-12 23:11:51,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 508 events. 360/508 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1627 event pairs, 39 based on Foata normal form. 1/305 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2022-12-12 23:11:51,204 INFO L137 encePairwiseOnDemand]: 19/24 looper letters, 32 selfloop transitions, 4 changer transitions 1/40 dead transitions. [2022-12-12 23:11:51,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 187 flow [2022-12-12 23:11:51,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 23:11:51,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 23:11:51,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2022-12-12 23:11:51,220 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2022-12-12 23:11:51,225 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2022-12-12 23:11:51,225 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 40 transitions, 187 flow [2022-12-12 23:11:51,228 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 39 transitions, 180 flow [2022-12-12 23:11:51,229 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 39 transitions, 180 flow [2022-12-12 23:11:51,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 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 23:11:51,230 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:51,230 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:51,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 23:11:51,231 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:51,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:51,234 INFO L85 PathProgramCache]: Analyzing trace with hash -440998104, now seen corresponding path program 1 times [2022-12-12 23:11:51,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:51,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166826582] [2022-12-12 23:11:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:51,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:51,453 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 23:11:51,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:51,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166826582] [2022-12-12 23:11:51,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166826582] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:11:51,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:11:51,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 23:11:51,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617955413] [2022-12-12 23:11:51,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:11:51,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:11:51,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:51,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:11:51,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:11:51,457 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 24 [2022-12-12 23:11:51,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 39 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 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 23:11:51,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:51,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 24 [2022-12-12 23:11:51,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:51,758 INFO L130 PetriNetUnfolder]: 675/985 cut-off events. [2022-12-12 23:11:51,758 INFO L131 PetriNetUnfolder]: For 225/229 co-relation queries the response was YES. [2022-12-12 23:11:51,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2985 conditions, 985 events. 675/985 cut-off events. For 225/229 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4032 event pairs, 66 based on Foata normal form. 0/665 useless extension candidates. Maximal degree in co-relation 1193. Up to 705 conditions per place. [2022-12-12 23:11:51,769 INFO L137 encePairwiseOnDemand]: 18/24 looper letters, 95 selfloop transitions, 6 changer transitions 6/109 dead transitions. [2022-12-12 23:11:51,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 109 transitions, 726 flow [2022-12-12 23:11:51,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 23:11:51,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 23:11:51,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2022-12-12 23:11:51,771 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2022-12-12 23:11:51,772 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2022-12-12 23:11:51,772 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 109 transitions, 726 flow [2022-12-12 23:11:51,778 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 103 transitions, 681 flow [2022-12-12 23:11:51,778 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 103 transitions, 681 flow [2022-12-12 23:11:51,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 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 23:11:51,778 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:51,778 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:51,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 23:11:51,779 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:51,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:51,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1704022116, now seen corresponding path program 1 times [2022-12-12 23:11:51,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:51,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991017564] [2022-12-12 23:11:51,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:51,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:51,940 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 23:11:51,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:51,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991017564] [2022-12-12 23:11:51,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991017564] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:11:51,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:11:51,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 23:11:51,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798985418] [2022-12-12 23:11:51,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:11:51,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:11:51,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:51,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:11:51,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:11:51,942 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:11:51,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 103 transitions, 681 flow. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 23:11:51,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:51,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:11:51,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:52,164 INFO L130 PetriNetUnfolder]: 621/949 cut-off events. [2022-12-12 23:11:52,165 INFO L131 PetriNetUnfolder]: For 496/500 co-relation queries the response was YES. [2022-12-12 23:11:52,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3649 conditions, 949 events. 621/949 cut-off events. For 496/500 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3969 event pairs, 92 based on Foata normal form. 0/724 useless extension candidates. Maximal degree in co-relation 1649. Up to 565 conditions per place. [2022-12-12 23:11:52,170 INFO L137 encePairwiseOnDemand]: 19/24 looper letters, 110 selfloop transitions, 4 changer transitions 12/127 dead transitions. [2022-12-12 23:11:52,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 127 transitions, 1089 flow [2022-12-12 23:11:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:11:52,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:11:52,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2022-12-12 23:11:52,173 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2022-12-12 23:11:52,174 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 11 predicate places. [2022-12-12 23:11:52,175 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 127 transitions, 1089 flow [2022-12-12 23:11:52,181 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 115 transitions, 981 flow [2022-12-12 23:11:52,181 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 115 transitions, 981 flow [2022-12-12 23:11:52,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 23:11:52,182 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:52,182 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:52,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-12 23:11:52,182 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:52,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:52,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1448781821, now seen corresponding path program 1 times [2022-12-12 23:11:52,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:52,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634896620] [2022-12-12 23:11:52,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:52,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:52,287 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 23:11:52,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:52,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634896620] [2022-12-12 23:11:52,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634896620] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:11:52,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:11:52,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 23:11:52,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694734506] [2022-12-12 23:11:52,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:11:52,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:11:52,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:52,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:11:52,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:11:52,289 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 24 [2022-12-12 23:11:52,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 115 transitions, 981 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 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 23:11:52,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:52,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 24 [2022-12-12 23:11:52,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:52,418 INFO L130 PetriNetUnfolder]: 481/735 cut-off events. [2022-12-12 23:11:52,418 INFO L131 PetriNetUnfolder]: For 538/546 co-relation queries the response was YES. [2022-12-12 23:11:52,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3287 conditions, 735 events. 481/735 cut-off events. For 538/546 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2575 event pairs, 123 based on Foata normal form. 40/609 useless extension candidates. Maximal degree in co-relation 2161. Up to 584 conditions per place. [2022-12-12 23:11:52,424 INFO L137 encePairwiseOnDemand]: 19/24 looper letters, 52 selfloop transitions, 2 changer transitions 34/90 dead transitions. [2022-12-12 23:11:52,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 90 transitions, 924 flow [2022-12-12 23:11:52,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:11:52,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:11:52,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2022-12-12 23:11:52,425 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.425 [2022-12-12 23:11:52,426 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2022-12-12 23:11:52,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 90 transitions, 924 flow [2022-12-12 23:11:52,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 56 transitions, 583 flow [2022-12-12 23:11:52,430 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 56 transitions, 583 flow [2022-12-12 23:11:52,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 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 23:11:52,431 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:52,431 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:52,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-12 23:11:52,431 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:52,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:52,432 INFO L85 PathProgramCache]: Analyzing trace with hash 2120255813, now seen corresponding path program 1 times [2022-12-12 23:11:52,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:52,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449846116] [2022-12-12 23:11:52,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:52,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:52,509 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 23:11:52,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:52,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449846116] [2022-12-12 23:11:52,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449846116] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:52,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19445929] [2022-12-12 23:11:52,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:52,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:52,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:11:52,515 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 23:11:52,556 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 23:11:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:52,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:11:52,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:11:52,699 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 23:11:52,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:11:52,728 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 23:11:52,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19445929] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:52,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 23:11:52,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-12-12 23:11:52,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309350401] [2022-12-12 23:11:52,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:11:52,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:11:52,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:52,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:11:52,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-12 23:11:52,730 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 24 [2022-12-12 23:11:52,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 56 transitions, 583 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 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 23:11:52,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:52,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 24 [2022-12-12 23:11:52,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:52,914 INFO L130 PetriNetUnfolder]: 369/539 cut-off events. [2022-12-12 23:11:52,914 INFO L131 PetriNetUnfolder]: For 602/637 co-relation queries the response was YES. [2022-12-12 23:11:52,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2915 conditions, 539 events. 369/539 cut-off events. For 602/637 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1673 event pairs, 66 based on Foata normal form. 5/416 useless extension candidates. Maximal degree in co-relation 2694. Up to 502 conditions per place. [2022-12-12 23:11:52,918 INFO L137 encePairwiseOnDemand]: 19/24 looper letters, 63 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2022-12-12 23:11:52,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 72 transitions, 883 flow [2022-12-12 23:11:52,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:11:52,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:11:52,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 44 transitions. [2022-12-12 23:11:52,919 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2022-12-12 23:11:52,920 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2022-12-12 23:11:52,920 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 72 transitions, 883 flow [2022-12-12 23:11:52,923 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 72 transitions, 883 flow [2022-12-12 23:11:52,923 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 72 transitions, 883 flow [2022-12-12 23:11:52,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 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 23:11:52,924 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:52,924 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:52,957 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 23:11:53,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:53,130 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:53,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:53,130 INFO L85 PathProgramCache]: Analyzing trace with hash -2056815404, now seen corresponding path program 1 times [2022-12-12 23:11:53,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:53,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068380693] [2022-12-12 23:11:53,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:53,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:53,280 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 23:11:53,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:53,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068380693] [2022-12-12 23:11:53,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068380693] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:53,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202532374] [2022-12-12 23:11:53,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:53,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:53,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:11:53,283 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 23:11:53,285 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 23:11:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:53,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:11:53,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:11:53,479 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 23:11:53,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:11:53,539 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 23:11:53,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202532374] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:53,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 23:11:53,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2022-12-12 23:11:53,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231990584] [2022-12-12 23:11:53,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:11:53,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 23:11:53,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:53,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 23:11:53,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-12 23:11:53,542 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:11:53,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 72 transitions, 883 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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 23:11:53,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:53,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:11:53,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:53,756 INFO L130 PetriNetUnfolder]: 572/822 cut-off events. [2022-12-12 23:11:53,757 INFO L131 PetriNetUnfolder]: For 2134/2244 co-relation queries the response was YES. [2022-12-12 23:11:53,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5419 conditions, 822 events. 572/822 cut-off events. For 2134/2244 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2905 event pairs, 45 based on Foata normal form. 8/613 useless extension candidates. Maximal degree in co-relation 5039. Up to 786 conditions per place. [2022-12-12 23:11:53,763 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 145 selfloop transitions, 23 changer transitions 0/169 dead transitions. [2022-12-12 23:11:53,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 169 transitions, 2416 flow [2022-12-12 23:11:53,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:11:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:11:53,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 66 transitions. [2022-12-12 23:11:53,765 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2022-12-12 23:11:53,766 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2022-12-12 23:11:53,766 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 169 transitions, 2416 flow [2022-12-12 23:11:53,773 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 169 transitions, 2416 flow [2022-12-12 23:11:53,773 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 169 transitions, 2416 flow [2022-12-12 23:11:53,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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 23:11:53,774 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:53,774 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:53,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 23:11:53,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-12 23:11:53,981 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:53,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:53,981 INFO L85 PathProgramCache]: Analyzing trace with hash 745132794, now seen corresponding path program 2 times [2022-12-12 23:11:53,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:53,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139855066] [2022-12-12 23:11:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:53,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:54,104 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 23:11:54,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:54,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139855066] [2022-12-12 23:11:54,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139855066] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:54,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864351446] [2022-12-12 23:11:54,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:11:54,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:54,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:11:54,108 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 23:11:54,110 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 23:11:54,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:11:54,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:11:54,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:11:54,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:11:54,293 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 23:11:54,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:11:54,360 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 23:11:54,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864351446] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:54,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 23:11:54,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-12-12 23:11:54,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638049209] [2022-12-12 23:11:54,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:11:54,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 23:11:54,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:54,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 23:11:54,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-12-12 23:11:54,362 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:11:54,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 169 transitions, 2416 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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 23:11:54,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:54,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:11:54,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:54,610 INFO L130 PetriNetUnfolder]: 818/1202 cut-off events. [2022-12-12 23:11:54,610 INFO L131 PetriNetUnfolder]: For 2223/2273 co-relation queries the response was YES. [2022-12-12 23:11:54,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9109 conditions, 1202 events. 818/1202 cut-off events. For 2223/2273 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4559 event pairs, 42 based on Foata normal form. 0/865 useless extension candidates. Maximal degree in co-relation 8444. Up to 1152 conditions per place. [2022-12-12 23:11:54,623 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 270 selfloop transitions, 37 changer transitions 0/308 dead transitions. [2022-12-12 23:11:54,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 308 transitions, 5025 flow [2022-12-12 23:11:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:11:54,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:11:54,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 65 transitions. [2022-12-12 23:11:54,624 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2022-12-12 23:11:54,625 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2022-12-12 23:11:54,625 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 308 transitions, 5025 flow [2022-12-12 23:11:54,650 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 308 transitions, 5025 flow [2022-12-12 23:11:54,650 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 308 transitions, 5025 flow [2022-12-12 23:11:54,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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 23:11:54,651 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:54,651 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:54,661 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 23:11:54,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:54,858 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:54,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:54,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1711014988, now seen corresponding path program 3 times [2022-12-12 23:11:54,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:54,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93646091] [2022-12-12 23:11:54,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:54,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:54,979 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 23:11:54,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:54,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93646091] [2022-12-12 23:11:54,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93646091] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:54,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423081036] [2022-12-12 23:11:54,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:11:54,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:54,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:11:54,982 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 23:11:54,983 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 23:11:55,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:11:55,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:11:55,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:11:55,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:11:55,158 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 23:11:55,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:11:55,233 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 23:11:55,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423081036] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:55,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 23:11:55,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-12-12 23:11:55,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370587881] [2022-12-12 23:11:55,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:11:55,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 23:11:55,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:55,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 23:11:55,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-12-12 23:11:55,235 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:11:55,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 308 transitions, 5025 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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 23:11:55,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:55,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:11:55,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:55,526 INFO L130 PetriNetUnfolder]: 827/1211 cut-off events. [2022-12-12 23:11:55,526 INFO L131 PetriNetUnfolder]: For 2701/2787 co-relation queries the response was YES. [2022-12-12 23:11:55,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10367 conditions, 1211 events. 827/1211 cut-off events. For 2701/2787 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4686 event pairs, 42 based on Foata normal form. 4/880 useless extension candidates. Maximal degree in co-relation 9622. Up to 1161 conditions per place. [2022-12-12 23:11:55,536 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 265 selfloop transitions, 39 changer transitions 0/305 dead transitions. [2022-12-12 23:11:55,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 305 transitions, 5585 flow [2022-12-12 23:11:55,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:11:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:11:55,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 69 transitions. [2022-12-12 23:11:55,538 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2022-12-12 23:11:55,538 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 31 predicate places. [2022-12-12 23:11:55,539 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 305 transitions, 5585 flow [2022-12-12 23:11:55,549 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 305 transitions, 5585 flow [2022-12-12 23:11:55,549 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 305 transitions, 5585 flow [2022-12-12 23:11:55,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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 23:11:55,549 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:55,549 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:55,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 23:11:55,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:55,756 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:55,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:55,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1878661438, now seen corresponding path program 4 times [2022-12-12 23:11:55,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:55,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341953677] [2022-12-12 23:11:55,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:55,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:55,866 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 23:11:55,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:55,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341953677] [2022-12-12 23:11:55,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341953677] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:55,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866637161] [2022-12-12 23:11:55,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:11:55,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:55,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:11:55,869 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 23:11:55,871 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 23:11:55,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:11:55,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:11:55,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:11:55,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:11:56,035 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 23:11:56,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:11:56,112 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 23:11:56,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866637161] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:56,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 23:11:56,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-12-12 23:11:56,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611864255] [2022-12-12 23:11:56,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:11:56,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 23:11:56,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:56,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 23:11:56,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-12-12 23:11:56,118 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:11:56,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 305 transitions, 5585 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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 23:11:56,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:56,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:11:56,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:56,376 INFO L130 PetriNetUnfolder]: 811/1181 cut-off events. [2022-12-12 23:11:56,376 INFO L131 PetriNetUnfolder]: For 3023/3109 co-relation queries the response was YES. [2022-12-12 23:11:56,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11240 conditions, 1181 events. 811/1181 cut-off events. For 3023/3109 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4483 event pairs, 42 based on Foata normal form. 4/864 useless extension candidates. Maximal degree in co-relation 10477. Up to 1133 conditions per place. [2022-12-12 23:11:56,387 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 253 selfloop transitions, 36 changer transitions 0/290 dead transitions. [2022-12-12 23:11:56,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 290 transitions, 5884 flow [2022-12-12 23:11:56,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:11:56,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:11:56,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 67 transitions. [2022-12-12 23:11:56,391 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2022-12-12 23:11:56,392 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2022-12-12 23:11:56,392 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 290 transitions, 5884 flow [2022-12-12 23:11:56,402 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 290 transitions, 5884 flow [2022-12-12 23:11:56,403 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 290 transitions, 5884 flow [2022-12-12 23:11:56,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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 23:11:56,403 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:56,403 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:56,411 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 23:11:56,609 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 23:11:56,609 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:56,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:56,610 INFO L85 PathProgramCache]: Analyzing trace with hash -906847890, now seen corresponding path program 5 times [2022-12-12 23:11:56,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:56,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337554016] [2022-12-12 23:11:56,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:56,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:56,741 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 23:11:56,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:56,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337554016] [2022-12-12 23:11:56,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337554016] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:56,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396936231] [2022-12-12 23:11:56,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:11:56,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:56,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:11:56,743 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 23:11:56,745 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 23:11:56,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:11:56,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:11:56,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:11:56,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:11:56,877 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 23:11:56,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:11:56,931 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 23:11:56,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396936231] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:11:56,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:11:56,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-12-12 23:11:56,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224298447] [2022-12-12 23:11:56,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:11:56,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 23:11:56,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:56,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 23:11:56,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-12-12 23:11:56,935 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 23:11:56,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 290 transitions, 5884 flow. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 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 23:11:56,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:56,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 23:11:56,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:57,301 INFO L130 PetriNetUnfolder]: 802/1185 cut-off events. [2022-12-12 23:11:57,301 INFO L131 PetriNetUnfolder]: For 4618/4618 co-relation queries the response was YES. [2022-12-12 23:11:57,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12247 conditions, 1185 events. 802/1185 cut-off events. For 4618/4618 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4502 event pairs, 40 based on Foata normal form. 0/880 useless extension candidates. Maximal degree in co-relation 11408. Up to 1113 conditions per place. [2022-12-12 23:11:57,311 INFO L137 encePairwiseOnDemand]: 15/24 looper letters, 293 selfloop transitions, 48 changer transitions 0/341 dead transitions. [2022-12-12 23:11:57,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 341 transitions, 7500 flow [2022-12-12 23:11:57,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 23:11:57,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 23:11:57,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 83 transitions. [2022-12-12 23:11:57,313 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3143939393939394 [2022-12-12 23:11:57,313 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 47 predicate places. [2022-12-12 23:11:57,313 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 341 transitions, 7500 flow [2022-12-12 23:11:57,324 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 341 transitions, 7500 flow [2022-12-12 23:11:57,324 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 341 transitions, 7500 flow [2022-12-12 23:11:57,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 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 23:11:57,325 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:57,325 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:57,333 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 23:11:57,531 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 23:11:57,532 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:57,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:57,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1747883040, now seen corresponding path program 6 times [2022-12-12 23:11:57,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:57,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116324236] [2022-12-12 23:11:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:57,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:57,626 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 23:11:57,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:57,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116324236] [2022-12-12 23:11:57,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116324236] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:57,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611673306] [2022-12-12 23:11:57,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:11:57,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:57,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:11:57,632 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 23:11:57,643 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 23:11:57,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 23:11:57,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:11:57,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:11:57,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:11:57,813 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 23:11:57,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:11:57,877 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 23:11:57,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611673306] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:57,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 23:11:57,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-12-12 23:11:57,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717642533] [2022-12-12 23:11:57,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:11:57,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 23:11:57,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:57,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 23:11:57,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-12-12 23:11:57,879 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:11:57,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 341 transitions, 7500 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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 23:11:57,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:57,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:11:57,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:11:58,162 INFO L130 PetriNetUnfolder]: 788/1157 cut-off events. [2022-12-12 23:11:58,163 INFO L131 PetriNetUnfolder]: For 5455/5455 co-relation queries the response was YES. [2022-12-12 23:11:58,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13038 conditions, 1157 events. 788/1157 cut-off events. For 5455/5455 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4327 event pairs, 40 based on Foata normal form. 0/864 useless extension candidates. Maximal degree in co-relation 12175. Up to 1087 conditions per place. [2022-12-12 23:11:58,172 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 278 selfloop transitions, 44 changer transitions 0/326 dead transitions. [2022-12-12 23:11:58,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 326 transitions, 7805 flow [2022-12-12 23:11:58,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:11:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:11:58,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 63 transitions. [2022-12-12 23:11:58,173 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.375 [2022-12-12 23:11:58,173 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2022-12-12 23:11:58,174 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 326 transitions, 7805 flow [2022-12-12 23:11:58,184 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 326 transitions, 7805 flow [2022-12-12 23:11:58,185 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 326 transitions, 7805 flow [2022-12-12 23:11:58,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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 23:11:58,185 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:11:58,185 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:11:58,193 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 23:11:58,391 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 23:11:58,391 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:11:58,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:11:58,392 INFO L85 PathProgramCache]: Analyzing trace with hash 944062068, now seen corresponding path program 1 times [2022-12-12 23:11:58,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:11:58,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608692966] [2022-12-12 23:11:58,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:58,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:11:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:11:58,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:11:58,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608692966] [2022-12-12 23:11:58,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608692966] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:11:58,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936360607] [2022-12-12 23:11:58,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:11:58,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:11:58,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:11:58,894 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 23:11:58,921 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 23:11:59,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:11:59,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-12 23:11:59,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:11:59,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:11:59,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:11:59,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-12 23:11:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:11:59,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:11:59,450 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:11:59,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2022-12-12 23:11:59,480 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-12 23:11:59,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 13 [2022-12-12 23:11:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:11:59,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936360607] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:11:59,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:11:59,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2022-12-12 23:11:59,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984662754] [2022-12-12 23:11:59,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:11:59,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 23:11:59,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:11:59,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 23:11:59,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-12-12 23:11:59,742 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:11:59,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 326 transitions, 7805 flow. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 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 23:11:59,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:11:59,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:11:59,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:12:01,058 INFO L130 PetriNetUnfolder]: 1631/2434 cut-off events. [2022-12-12 23:12:01,058 INFO L131 PetriNetUnfolder]: For 7820/7820 co-relation queries the response was YES. [2022-12-12 23:12:01,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29950 conditions, 2434 events. 1631/2434 cut-off events. For 7820/7820 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 10931 event pairs, 16 based on Foata normal form. 2/1822 useless extension candidates. Maximal degree in co-relation 25334. Up to 2322 conditions per place. [2022-12-12 23:12:01,077 INFO L137 encePairwiseOnDemand]: 12/24 looper letters, 558 selfloop transitions, 222 changer transitions 12/798 dead transitions. [2022-12-12 23:12:01,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 798 transitions, 20729 flow [2022-12-12 23:12:01,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 23:12:01,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 23:12:01,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 169 transitions. [2022-12-12 23:12:01,079 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4401041666666667 [2022-12-12 23:12:01,080 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 68 predicate places. [2022-12-12 23:12:01,080 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 798 transitions, 20729 flow [2022-12-12 23:12:01,102 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 786 transitions, 20399 flow [2022-12-12 23:12:01,103 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 786 transitions, 20399 flow [2022-12-12 23:12:01,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 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 23:12:01,103 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:12:01,103 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:12:01,116 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 23:12:01,310 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 23:12:01,310 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:12:01,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:12:01,311 INFO L85 PathProgramCache]: Analyzing trace with hash 819028914, now seen corresponding path program 1 times [2022-12-12 23:12:01,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:12:01,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220479615] [2022-12-12 23:12:01,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:12:01,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:12:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:12:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:01,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:12:01,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220479615] [2022-12-12 23:12:01,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220479615] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:12:01,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531377277] [2022-12-12 23:12:01,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:12:01,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:12:01,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:12:01,742 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 23:12:01,745 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 23:12:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:12:01,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-12 23:12:01,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:12:01,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 23:12:01,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:12:01,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:12:01,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:12:02,061 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 22 treesize of output 10 [2022-12-12 23:12:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:12:02,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:12:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:02,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531377277] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:12:02,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:12:02,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 4] total 13 [2022-12-12 23:12:02,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136274065] [2022-12-12 23:12:02,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:12:02,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 23:12:02,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:12:02,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 23:12:02,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-12-12 23:12:02,211 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:12:02,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 786 transitions, 20399 flow. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 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 23:12:02,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:12:02,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:12:02,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:12:03,142 INFO L130 PetriNetUnfolder]: 2283/3428 cut-off events. [2022-12-12 23:12:03,142 INFO L131 PetriNetUnfolder]: For 9558/9558 co-relation queries the response was YES. [2022-12-12 23:12:03,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45924 conditions, 3428 events. 2283/3428 cut-off events. For 9558/9558 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 16725 event pairs, 19 based on Foata normal form. 2/2560 useless extension candidates. Maximal degree in co-relation 32518. Up to 3316 conditions per place. [2022-12-12 23:12:03,170 INFO L137 encePairwiseOnDemand]: 14/24 looper letters, 860 selfloop transitions, 228 changer transitions 6/1113 dead transitions. [2022-12-12 23:12:03,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 1113 transitions, 31223 flow [2022-12-12 23:12:03,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:12:03,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:12:03,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2022-12-12 23:12:03,172 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2022-12-12 23:12:03,172 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 75 predicate places. [2022-12-12 23:12:03,172 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 1113 transitions, 31223 flow [2022-12-12 23:12:03,209 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 1107 transitions, 31043 flow [2022-12-12 23:12:03,209 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 1107 transitions, 31043 flow [2022-12-12 23:12:03,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 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 23:12:03,209 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:12:03,209 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:12:03,215 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 23:12:03,415 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 23:12:03,415 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:12:03,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:12:03,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1341600296, now seen corresponding path program 2 times [2022-12-12 23:12:03,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:12:03,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619529576] [2022-12-12 23:12:03,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:12:03,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:12:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:12:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:03,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:12:03,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619529576] [2022-12-12 23:12:03,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619529576] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:12:03,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209419] [2022-12-12 23:12:03,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:12:03,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:12:03,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:12:03,991 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 23:12:03,994 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 23:12:04,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:12:04,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:12:04,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-12 23:12:04,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:12:04,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:12:04,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 23:12:04,276 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 15 treesize of output 7 [2022-12-12 23:12:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:04,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:12:04,384 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~A~0.offset (* |c_thread2Thread1of1ForFork1_~i~1#1| 4)))) (and (forall ((v_ArrVal_526 (Array Int Int))) (< (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_526) c_~A~0.base) .cse0)) (+ c_~res1~0 1))) (forall ((v_ArrVal_526 (Array Int Int))) (<= c_~res1~0 (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_526) c_~A~0.base) .cse0)))))) is different from false [2022-12-12 23:12:04,417 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_526 (Array Int Int))) (< (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_526) c_~A~0.base) c_~A~0.offset)) (+ c_~res1~0 1))) (forall ((v_ArrVal_526 (Array Int Int))) (<= c_~res1~0 (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_526) c_~A~0.base) c_~A~0.offset))))) is different from false [2022-12-12 23:12:04,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:12:04,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 36 [2022-12-12 23:12:04,441 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 13 treesize of output 11 [2022-12-12 23:12:04,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:12:04,468 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-12 23:12:04,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-12-12 23:12:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-12-12 23:12:04,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209419] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:12:04,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:12:04,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-12-12 23:12:04,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57649011] [2022-12-12 23:12:04,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:12:04,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 23:12:04,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:12:04,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 23:12:04,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=273, Unknown=2, NotChecked=70, Total=420 [2022-12-12 23:12:04,558 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:12:04,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 1107 transitions, 31043 flow. Second operand has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:12:04,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:12:04,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:12:04,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:12:05,667 INFO L130 PetriNetUnfolder]: 2677/4018 cut-off events. [2022-12-12 23:12:05,667 INFO L131 PetriNetUnfolder]: For 14330/14330 co-relation queries the response was YES. [2022-12-12 23:12:05,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57779 conditions, 4018 events. 2677/4018 cut-off events. For 14330/14330 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20363 event pairs, 4 based on Foata normal form. 2/2991 useless extension candidates. Maximal degree in co-relation 39054. Up to 3906 conditions per place. [2022-12-12 23:12:05,703 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 1001 selfloop transitions, 266 changer transitions 6/1292 dead transitions. [2022-12-12 23:12:05,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 1292 transitions, 38865 flow [2022-12-12 23:12:05,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:12:05,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:12:05,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2022-12-12 23:12:05,705 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2022-12-12 23:12:05,705 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 81 predicate places. [2022-12-12 23:12:05,706 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 1292 transitions, 38865 flow [2022-12-12 23:12:05,801 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 1286 transitions, 38673 flow [2022-12-12 23:12:05,801 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 1286 transitions, 38673 flow [2022-12-12 23:12:05,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:12:05,802 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:12:05,802 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:12:05,807 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 23:12:06,002 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 23:12:06,003 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:12:06,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:12:06,003 INFO L85 PathProgramCache]: Analyzing trace with hash 459567578, now seen corresponding path program 2 times [2022-12-12 23:12:06,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:12:06,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624671064] [2022-12-12 23:12:06,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:12:06,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:12:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:12:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:12:06,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:12:06,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624671064] [2022-12-12 23:12:06,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624671064] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:12:06,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791494818] [2022-12-12 23:12:06,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:12:06,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:12:06,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:12:06,592 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 23:12:06,601 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 23:12:06,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:12:06,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:12:06,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-12 23:12:06,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:12:06,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:12:06,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 23:12:06,956 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:12:06,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-12-12 23:12:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:07,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:12:07,221 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:12:07,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 44 [2022-12-12 23:12:07,225 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 18 treesize of output 12 [2022-12-12 23:12:07,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:12:07,241 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-12 23:12:07,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 12 [2022-12-12 23:12:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:07,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791494818] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:12:07,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:12:07,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2022-12-12 23:12:07,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954099580] [2022-12-12 23:12:07,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:12:07,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-12 23:12:07,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:12:07,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-12 23:12:07,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=540, Unknown=3, NotChecked=0, Total=650 [2022-12-12 23:12:07,369 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 23:12:07,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 1286 transitions, 38673 flow. Second operand has 26 states, 25 states have (on average 2.48) internal successors, (62), 25 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 23:12:07,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:12:07,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 23:12:07,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:12:10,911 INFO L130 PetriNetUnfolder]: 3611/5430 cut-off events. [2022-12-12 23:12:10,911 INFO L131 PetriNetUnfolder]: For 16459/16459 co-relation queries the response was YES. [2022-12-12 23:12:10,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83900 conditions, 5430 events. 3611/5430 cut-off events. For 16459/16459 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 29064 event pairs, 10 based on Foata normal form. 4/3996 useless extension candidates. Maximal degree in co-relation 50323. Up to 5318 conditions per place. [2022-12-12 23:12:10,961 INFO L137 encePairwiseOnDemand]: 11/24 looper letters, 1331 selfloop transitions, 466 changer transitions 24/1821 dead transitions. [2022-12-12 23:12:10,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 1821 transitions, 58296 flow [2022-12-12 23:12:10,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-12 23:12:10,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-12 23:12:10,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 285 transitions. [2022-12-12 23:12:10,963 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.35984848484848486 [2022-12-12 23:12:10,963 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 113 predicate places. [2022-12-12 23:12:10,963 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 1821 transitions, 58296 flow [2022-12-12 23:12:11,017 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 1797 transitions, 57492 flow [2022-12-12 23:12:11,017 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 1797 transitions, 57492 flow [2022-12-12 23:12:11,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.48) internal successors, (62), 25 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 23:12:11,017 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:12:11,017 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:12:11,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-12 23:12:11,218 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 23:12:11,218 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:12:11,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:12:11,219 INFO L85 PathProgramCache]: Analyzing trace with hash 749765064, now seen corresponding path program 3 times [2022-12-12 23:12:11,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:12:11,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435927377] [2022-12-12 23:12:11,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:12:11,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:12:11,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:12:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:11,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:12:11,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435927377] [2022-12-12 23:12:11,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435927377] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:12:11,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523937721] [2022-12-12 23:12:11,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:12:11,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:12:11,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:12:11,553 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 23:12:11,556 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 23:12:11,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:12:11,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:12:11,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-12 23:12:11,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:12:11,739 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 22 treesize of output 10 [2022-12-12 23:12:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:11,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:12:11,816 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:12:11,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-12-12 23:12:11,826 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-12 23:12:11,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 12 [2022-12-12 23:12:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:11,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523937721] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:12:11,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:12:11,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2022-12-12 23:12:11,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731176136] [2022-12-12 23:12:11,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:12:11,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 23:12:11,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:12:11,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 23:12:11,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-12 23:12:11,881 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:12:11,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 1797 transitions, 57492 flow. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 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 23:12:11,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:12:11,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:12:11,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:12:14,097 INFO L130 PetriNetUnfolder]: 4261/6422 cut-off events. [2022-12-12 23:12:14,097 INFO L131 PetriNetUnfolder]: For 24770/24770 co-relation queries the response was YES. [2022-12-12 23:12:14,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105743 conditions, 6422 events. 4261/6422 cut-off events. For 24770/24770 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 35679 event pairs, 4 based on Foata normal form. 2/4744 useless extension candidates. Maximal degree in co-relation 62724. Up to 6310 conditions per place. [2022-12-12 23:12:14,219 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 1912 selfloop transitions, 218 changer transitions 6/2161 dead transitions. [2022-12-12 23:12:14,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 2161 transitions, 73601 flow [2022-12-12 23:12:14,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:12:14,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:12:14,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2022-12-12 23:12:14,221 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2022-12-12 23:12:14,221 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 119 predicate places. [2022-12-12 23:12:14,221 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 2161 transitions, 73601 flow [2022-12-12 23:12:14,284 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 2155 transitions, 73385 flow [2022-12-12 23:12:14,285 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 2155 transitions, 73385 flow [2022-12-12 23:12:14,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 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 23:12:14,285 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:12:14,285 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:12:14,291 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 23:12:14,490 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 23:12:14,491 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:12:14,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:12:14,491 INFO L85 PathProgramCache]: Analyzing trace with hash -225473892, now seen corresponding path program 4 times [2022-12-12 23:12:14,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:12:14,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645269562] [2022-12-12 23:12:14,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:12:14,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:12:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:12:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:14,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:12:14,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645269562] [2022-12-12 23:12:14,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645269562] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:12:14,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075683521] [2022-12-12 23:12:14,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:12:14,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:12:14,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:12:14,888 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 23:12:14,890 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 23:12:14,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:12:14,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:12:14,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-12 23:12:15,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:12:15,085 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 15 treesize of output 7 [2022-12-12 23:12:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:15,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:12:15,176 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:12:15,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2022-12-12 23:12:15,187 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-12 23:12:15,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 13 [2022-12-12 23:12:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:15,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075683521] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:12:15,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:12:15,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 13 [2022-12-12 23:12:15,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252747231] [2022-12-12 23:12:15,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:12:15,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 23:12:15,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:12:15,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 23:12:15,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-12-12 23:12:15,242 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:12:15,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 2155 transitions, 73385 flow. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 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 23:12:15,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:12:15,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:12:15,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:12:17,821 INFO L130 PetriNetUnfolder]: 4425/6668 cut-off events. [2022-12-12 23:12:17,821 INFO L131 PetriNetUnfolder]: For 31007/31007 co-relation queries the response was YES. [2022-12-12 23:12:17,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116210 conditions, 6668 events. 4425/6668 cut-off events. For 31007/31007 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 37314 event pairs, 6 based on Foata normal form. 2/4914 useless extension candidates. Maximal degree in co-relation 70332. Up to 6556 conditions per place. [2022-12-12 23:12:17,868 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 2030 selfloop transitions, 156 changer transitions 6/2217 dead transitions. [2022-12-12 23:12:17,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 2217 transitions, 79913 flow [2022-12-12 23:12:17,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:12:17,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:12:17,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2022-12-12 23:12:17,869 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2022-12-12 23:12:17,870 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 125 predicate places. [2022-12-12 23:12:17,870 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 2217 transitions, 79913 flow [2022-12-12 23:12:17,932 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 2211 transitions, 79685 flow [2022-12-12 23:12:17,932 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 2211 transitions, 79685 flow [2022-12-12 23:12:17,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 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 23:12:17,932 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:12:17,932 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:12:17,938 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 23:12:18,133 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 23:12:18,133 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:12:18,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:12:18,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1550913076, now seen corresponding path program 3 times [2022-12-12 23:12:18,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:12:18,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240114334] [2022-12-12 23:12:18,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:12:18,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:12:18,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:12:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:12:18,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:12:18,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240114334] [2022-12-12 23:12:18,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240114334] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:12:18,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162992123] [2022-12-12 23:12:18,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:12:18,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:12:18,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:12:18,573 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 23:12:18,576 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 23:12:18,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 23:12:18,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:12:18,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-12 23:12:18,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:12:18,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 23:12:18,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:12:18,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:12:18,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:12:19,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:12:19,031 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:12:19,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-12 23:12:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:12:19,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:12:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:19,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162992123] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:12:19,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:12:19,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 28 [2022-12-12 23:12:19,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356921507] [2022-12-12 23:12:19,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:12:19,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-12 23:12:19,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:12:19,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-12 23:12:19,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=731, Unknown=5, NotChecked=0, Total=870 [2022-12-12 23:12:19,517 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 23:12:19,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 2211 transitions, 79685 flow. Second operand has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 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 23:12:19,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:12:19,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 23:12:19,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:12:22,943 INFO L130 PetriNetUnfolder]: 4485/6768 cut-off events. [2022-12-12 23:12:22,944 INFO L131 PetriNetUnfolder]: For 32045/32045 co-relation queries the response was YES. [2022-12-12 23:12:22,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124759 conditions, 6768 events. 4485/6768 cut-off events. For 32045/32045 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 38064 event pairs, 13 based on Foata normal form. 2/4987 useless extension candidates. Maximal degree in co-relation 76361. Up to 6656 conditions per place. [2022-12-12 23:12:22,996 INFO L137 encePairwiseOnDemand]: 12/24 looper letters, 2067 selfloop transitions, 185 changer transitions 12/2264 dead transitions. [2022-12-12 23:12:22,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 2264 transitions, 86050 flow [2022-12-12 23:12:22,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 23:12:22,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 23:12:22,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 112 transitions. [2022-12-12 23:12:22,998 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2022-12-12 23:12:22,998 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 138 predicate places. [2022-12-12 23:12:22,998 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 2264 transitions, 86050 flow [2022-12-12 23:12:23,064 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 2252 transitions, 85576 flow [2022-12-12 23:12:23,065 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 2252 transitions, 85576 flow [2022-12-12 23:12:23,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 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 23:12:23,065 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:12:23,065 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:12:23,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-12 23:12:23,265 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 23:12:23,266 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:12:23,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:12:23,266 INFO L85 PathProgramCache]: Analyzing trace with hash -647015418, now seen corresponding path program 4 times [2022-12-12 23:12:23,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:12:23,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121084939] [2022-12-12 23:12:23,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:12:23,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:12:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:12:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:12:23,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:12:23,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121084939] [2022-12-12 23:12:23,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121084939] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:12:23,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7564450] [2022-12-12 23:12:23,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:12:23,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:12:23,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:12:23,756 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 23:12:23,782 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 23:12:23,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:12:23,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:12:23,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-12 23:12:23,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:12:24,081 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:12:24,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-12-12 23:12:24,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:24,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:12:24,266 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:12:24,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-12-12 23:12:24,279 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-12 23:12:24,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 12 [2022-12-12 23:12:24,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:24,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7564450] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:12:24,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:12:24,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2022-12-12 23:12:24,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858277487] [2022-12-12 23:12:24,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:12:24,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 23:12:24,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:12:24,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 23:12:24,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-12-12 23:12:24,445 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 23:12:24,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 2252 transitions, 85576 flow. Second operand has 23 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 23:12:24,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:12:24,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 23:12:24,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:12:28,534 INFO L130 PetriNetUnfolder]: 4941/7504 cut-off events. [2022-12-12 23:12:28,534 INFO L131 PetriNetUnfolder]: For 34491/34491 co-relation queries the response was YES. [2022-12-12 23:12:28,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146187 conditions, 7504 events. 4941/7504 cut-off events. For 34491/34491 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 43377 event pairs, 10 based on Foata normal form. 4/5507 useless extension candidates. Maximal degree in co-relation 87288. Up to 7392 conditions per place. [2022-12-12 23:12:28,594 INFO L137 encePairwiseOnDemand]: 12/24 looper letters, 2272 selfloop transitions, 298 changer transitions 24/2594 dead transitions. [2022-12-12 23:12:28,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 2594 transitions, 103875 flow [2022-12-12 23:12:28,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-12 23:12:28,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-12 23:12:28,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 232 transitions. [2022-12-12 23:12:28,595 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3020833333333333 [2022-12-12 23:12:28,596 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 169 predicate places. [2022-12-12 23:12:28,596 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 2594 transitions, 103875 flow [2022-12-12 23:12:28,673 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 2570 transitions, 102879 flow [2022-12-12 23:12:28,673 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 2570 transitions, 102879 flow [2022-12-12 23:12:28,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 23:12:28,673 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:12:28,674 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:12:28,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-12 23:12:28,874 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 23:12:28,874 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:12:28,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:12:28,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1501343544, now seen corresponding path program 5 times [2022-12-12 23:12:28,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:12:28,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479425553] [2022-12-12 23:12:28,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:12:28,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:12:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:12:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:12:29,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:12:29,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479425553] [2022-12-12 23:12:29,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479425553] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:12:29,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043290024] [2022-12-12 23:12:29,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:12:29,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:12:29,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:12:29,541 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 23:12:29,546 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 23:12:29,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:12:29,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:12:29,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-12 23:12:29,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:12:29,847 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 22 treesize of output 10 [2022-12-12 23:12:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:12:29,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:12:29,932 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:12:29,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-12-12 23:12:29,941 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-12 23:12:29,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 12 [2022-12-12 23:12:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:12:30,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043290024] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:12:30,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:12:30,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 21 [2022-12-12 23:12:30,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772859355] [2022-12-12 23:12:30,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:12:30,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 23:12:30,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:12:30,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 23:12:30,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-12-12 23:12:30,211 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:12:30,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 2570 transitions, 102879 flow. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 0 states have call successors, (0), 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 23:12:30,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:12:30,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:12:30,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:12:34,440 INFO L130 PetriNetUnfolder]: 5283/8045 cut-off events. [2022-12-12 23:12:34,440 INFO L131 PetriNetUnfolder]: For 39125/39125 co-relation queries the response was YES. [2022-12-12 23:12:34,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164486 conditions, 8045 events. 5283/8045 cut-off events. For 39125/39125 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 47279 event pairs, 10 based on Foata normal form. 5/5901 useless extension candidates. Maximal degree in co-relation 100489. Up to 7933 conditions per place. [2022-12-12 23:12:34,504 INFO L137 encePairwiseOnDemand]: 14/24 looper letters, 2191 selfloop transitions, 544 changer transitions 30/2807 dead transitions. [2022-12-12 23:12:34,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 2807 transitions, 117970 flow [2022-12-12 23:12:34,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 23:12:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 23:12:34,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 143 transitions. [2022-12-12 23:12:34,506 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3723958333333333 [2022-12-12 23:12:34,507 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 183 predicate places. [2022-12-12 23:12:34,507 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 2807 transitions, 117970 flow [2022-12-12 23:12:34,591 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 213 places, 2777 transitions, 116665 flow [2022-12-12 23:12:34,592 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 2777 transitions, 116665 flow [2022-12-12 23:12:34,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 0 states have call successors, (0), 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 23:12:34,592 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:12:34,592 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:12:34,600 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 23:12:34,800 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 23:12:34,800 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:12:34,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:12:34,801 INFO L85 PathProgramCache]: Analyzing trace with hash -550341162, now seen corresponding path program 5 times [2022-12-12 23:12:34,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:12:34,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023913730] [2022-12-12 23:12:34,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:12:34,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:12:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:12:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:35,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:12:35,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023913730] [2022-12-12 23:12:35,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023913730] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:12:35,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611295375] [2022-12-12 23:12:35,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:12:35,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:12:35,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:12:35,208 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 23:12:35,236 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 23:12:35,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:12:35,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:12:35,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-12 23:12:35,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:12:35,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:12:35,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 23:12:35,487 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 15 treesize of output 7 [2022-12-12 23:12:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:35,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:12:35,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:12:35,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 42 [2022-12-12 23:12:35,616 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 17 treesize of output 11 [2022-12-12 23:12:35,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:12:35,631 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-12 23:12:35,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 13 [2022-12-12 23:12:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:35,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611295375] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:12:35,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:12:35,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-12-12 23:12:35,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970175843] [2022-12-12 23:12:35,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:12:35,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 23:12:35,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:12:35,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 23:12:35,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=325, Unknown=4, NotChecked=0, Total=420 [2022-12-12 23:12:35,724 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:12:35,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 2777 transitions, 116665 flow. Second operand has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:12:35,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:12:35,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:12:35,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:12:40,188 INFO L130 PetriNetUnfolder]: 5381/8184 cut-off events. [2022-12-12 23:12:40,188 INFO L131 PetriNetUnfolder]: For 46578/46578 co-relation queries the response was YES. [2022-12-12 23:12:40,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175183 conditions, 8184 events. 5381/8184 cut-off events. For 46578/46578 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 48176 event pairs, 13 based on Foata normal form. 2/5989 useless extension candidates. Maximal degree in co-relation 111033. Up to 8072 conditions per place. [2022-12-12 23:12:40,252 INFO L137 encePairwiseOnDemand]: 17/24 looper letters, 2570 selfloop transitions, 210 changer transitions 6/2818 dead transitions. [2022-12-12 23:12:40,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 2818 transitions, 123992 flow [2022-12-12 23:12:40,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:12:40,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:12:40,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2022-12-12 23:12:40,253 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2022-12-12 23:12:40,254 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 189 predicate places. [2022-12-12 23:12:40,254 INFO L82 GeneralOperation]: Start removeDead. Operand has 219 places, 2818 transitions, 123992 flow [2022-12-12 23:12:40,344 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 219 places, 2812 transitions, 123716 flow [2022-12-12 23:12:40,345 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 2812 transitions, 123716 flow [2022-12-12 23:12:40,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:12:40,345 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:12:40,345 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:12:40,351 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 23:12:40,547 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 23:12:40,547 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:12:40,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:12:40,548 INFO L85 PathProgramCache]: Analyzing trace with hash 714177750, now seen corresponding path program 6 times [2022-12-12 23:12:40,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:12:40,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582407435] [2022-12-12 23:12:40,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:12:40,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:12:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:12:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:40,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:12:40,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582407435] [2022-12-12 23:12:40,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582407435] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:12:40,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067246701] [2022-12-12 23:12:40,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:12:40,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:12:40,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:12:40,928 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 23:12:40,931 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 23:12:41,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 23:12:41,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:12:41,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-12 23:12:41,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:12:41,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:12:41,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 23:12:41,205 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 15 treesize of output 7 [2022-12-12 23:12:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:41,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:12:41,295 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~A~0.offset (* |c_thread2Thread1of1ForFork1_~i~1#1| 4)))) (and (forall ((v_ArrVal_886 (Array Int Int))) (<= c_~res1~0 (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_886) c_~A~0.base) .cse0)))) (forall ((v_ArrVal_886 (Array Int Int))) (< (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_886) c_~A~0.base) .cse0)) (+ c_~res1~0 1))))) is different from false [2022-12-12 23:12:41,303 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:12:41,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 42 [2022-12-12 23:12:41,307 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 17 treesize of output 11 [2022-12-12 23:12:41,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:12:41,321 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-12 23:12:41,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 13 [2022-12-12 23:12:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:12:41,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067246701] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:12:41,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:12:41,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-12-12 23:12:41,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807742388] [2022-12-12 23:12:41,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:12:41,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 23:12:41,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:12:41,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 23:12:41,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=294, Unknown=1, NotChecked=36, Total=420 [2022-12-12 23:12:41,409 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:12:41,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 2812 transitions, 123716 flow. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 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 23:12:41,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:12:41,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:12:41,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:12:46,657 INFO L130 PetriNetUnfolder]: 5677/8630 cut-off events. [2022-12-12 23:12:46,657 INFO L131 PetriNetUnfolder]: For 58407/58407 co-relation queries the response was YES. [2022-12-12 23:12:46,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192984 conditions, 8630 events. 5677/8630 cut-off events. For 58407/58407 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 51246 event pairs, 22 based on Foata normal form. 2/6309 useless extension candidates. Maximal degree in co-relation 115880. Up to 8518 conditions per place. [2022-12-12 23:12:46,735 INFO L137 encePairwiseOnDemand]: 17/24 looper letters, 2621 selfloop transitions, 288 changer transitions 6/2947 dead transitions. [2022-12-12 23:12:46,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 2947 transitions, 135585 flow [2022-12-12 23:12:46,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:12:46,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:12:46,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2022-12-12 23:12:46,736 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2022-12-12 23:12:46,736 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 195 predicate places. [2022-12-12 23:12:46,737 INFO L82 GeneralOperation]: Start removeDead. Operand has 225 places, 2947 transitions, 135585 flow [2022-12-12 23:12:46,839 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 225 places, 2941 transitions, 135297 flow [2022-12-12 23:12:46,840 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 2941 transitions, 135297 flow [2022-12-12 23:12:46,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 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 23:12:46,840 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:12:46,840 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:12:46,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-12 23:12:47,040 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 23:12:47,041 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:12:47,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:12:47,041 INFO L85 PathProgramCache]: Analyzing trace with hash 608721898, now seen corresponding path program 6 times [2022-12-12 23:12:47,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:12:47,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30151172] [2022-12-12 23:12:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:12:47,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:12:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:12:47,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:12:47,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:12:47,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30151172] [2022-12-12 23:12:47,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30151172] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:12:47,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674897265] [2022-12-12 23:12:47,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:12:47,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:12:47,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:12:47,744 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 23:12:47,780 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 23:12:47,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 23:12:47,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:12:47,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-12 23:12:47,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:12:47,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 23:12:48,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:12:48,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:12:48,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 23:12:48,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:12:48,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 23:12:48,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:12:48,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-12-12 23:12:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:12:48,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:12:48,624 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((~M~0 Int)) (or (forall ((v_ArrVal_933 (Array Int Int)) (v_ArrVal_935 (Array Int Int)) (v_ArrVal_934 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_933))) (< (+ c_~res2~0 (select (select (store (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_934) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_935) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* ~M~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (+ (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) c_~res1~0 1)))) (< 0 ~M~0) (< ~M~0 0))) (forall ((~M~0 Int)) (or (forall ((v_ArrVal_933 (Array Int Int)) (v_ArrVal_935 (Array Int Int)) (v_ArrVal_934 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_933))) (<= (+ (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) c_~res1~0) (+ c_~res2~0 (select (select (store (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_934) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_935) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* ~M~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))))) (< 0 ~M~0) (< ~M~0 0)))) is different from false [2022-12-12 23:12:48,638 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:12:48,639 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 55 treesize of output 44 [2022-12-12 23:12:48,650 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-12 23:12:48,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3350 treesize of output 2970 [2022-12-12 23:12:48,677 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 2934 treesize of output 2742 [2022-12-12 23:12:48,692 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 2742 treesize of output 2358 [2022-12-12 23:12:48,713 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-12 23:12:48,713 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 2358 treesize of output 2138 [2022-12-12 23:12:57,786 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:12:57,786 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2022-12-12 23:12:57,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:12:57,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:12:57,795 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-12 23:12:57,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 102 treesize of output 82 [2022-12-12 23:12:57,803 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-12 23:12:57,803 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 75 treesize of output 63 [2022-12-12 23:12:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-12 23:12:57,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674897265] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:12:57,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:12:57,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 29 [2022-12-12 23:12:57,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021332060] [2022-12-12 23:12:57,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:12:57,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-12 23:12:57,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:12:57,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-12 23:12:57,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=731, Unknown=13, NotChecked=56, Total=930 [2022-12-12 23:12:57,846 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 23:12:57,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 2941 transitions, 135297 flow. Second operand has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 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 23:12:57,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:12:57,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 23:12:57,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:13:06,842 INFO L130 PetriNetUnfolder]: 6391/9688 cut-off events. [2022-12-12 23:13:06,842 INFO L131 PetriNetUnfolder]: For 65882/65882 co-relation queries the response was YES. [2022-12-12 23:13:06,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226296 conditions, 9688 events. 6391/9688 cut-off events. For 65882/65882 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 58391 event pairs, 2 based on Foata normal form. 2/7069 useless extension candidates. Maximal degree in co-relation 134460. Up to 9576 conditions per place. [2022-12-12 23:13:06,930 INFO L137 encePairwiseOnDemand]: 12/24 looper letters, 2575 selfloop transitions, 730 changer transitions 12/3317 dead transitions. [2022-12-12 23:13:06,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 3317 transitions, 159206 flow [2022-12-12 23:13:06,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-12 23:13:06,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-12 23:13:06,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 270 transitions. [2022-12-12 23:13:06,931 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3515625 [2022-12-12 23:13:06,932 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 226 predicate places. [2022-12-12 23:13:06,932 INFO L82 GeneralOperation]: Start removeDead. Operand has 256 places, 3317 transitions, 159206 flow [2022-12-12 23:13:07,057 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 256 places, 3305 transitions, 158612 flow [2022-12-12 23:13:07,057 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 3305 transitions, 158612 flow [2022-12-12 23:13:07,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 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 23:13:07,058 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:13:07,058 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:13:07,063 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 23:13:07,258 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 23:13:07,258 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:13:07,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:13:07,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1897766822, now seen corresponding path program 7 times [2022-12-12 23:13:07,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:13:07,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930846353] [2022-12-12 23:13:07,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:13:07,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:13:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:13:07,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:13:07,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:13:07,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930846353] [2022-12-12 23:13:07,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930846353] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:13:07,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108372476] [2022-12-12 23:13:07,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 23:13:07,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:13:07,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:13:07,760 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 23:13:07,766 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 23:13:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:13:07,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-12 23:13:07,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:13:07,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 23:13:07,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:13:08,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:13:08,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:13:08,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:13:08,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:13:08,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-12 23:13:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:13:08,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:13:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:13:08,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108372476] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:13:08,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:13:08,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 28 [2022-12-12 23:13:08,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119386387] [2022-12-12 23:13:08,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:13:08,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-12 23:13:08,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:13:08,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-12 23:13:08,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=742, Unknown=4, NotChecked=0, Total=870 [2022-12-12 23:13:08,541 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 23:13:08,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 3305 transitions, 158612 flow. Second operand has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 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 23:13:08,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:13:08,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 23:13:08,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:13:17,133 INFO L130 PetriNetUnfolder]: 6775/10294 cut-off events. [2022-12-12 23:13:17,133 INFO L131 PetriNetUnfolder]: For 70117/70117 co-relation queries the response was YES. [2022-12-12 23:13:17,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250571 conditions, 10294 events. 6775/10294 cut-off events. For 70117/70117 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 62888 event pairs, 6 based on Foata normal form. 4/7519 useless extension candidates. Maximal degree in co-relation 154317. Up to 10144 conditions per place. [2022-12-12 23:13:17,233 INFO L137 encePairwiseOnDemand]: 12/24 looper letters, 3194 selfloop transitions, 309 changer transitions 18/3521 dead transitions. [2022-12-12 23:13:17,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 3521 transitions, 175752 flow [2022-12-12 23:13:17,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 23:13:17,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 23:13:17,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 121 transitions. [2022-12-12 23:13:17,234 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3151041666666667 [2022-12-12 23:13:17,234 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 241 predicate places. [2022-12-12 23:13:17,235 INFO L82 GeneralOperation]: Start removeDead. Operand has 271 places, 3521 transitions, 175752 flow [2022-12-12 23:13:17,372 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 271 places, 3503 transitions, 174822 flow [2022-12-12 23:13:17,373 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 3503 transitions, 174822 flow [2022-12-12 23:13:17,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 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 23:13:17,373 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:13:17,373 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:13:17,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-12 23:13:17,573 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 23:13:17,574 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:13:17,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:13:17,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1371791116, now seen corresponding path program 7 times [2022-12-12 23:13:17,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:13:17,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625984758] [2022-12-12 23:13:17,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:13:17,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:13:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:13:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:13:17,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:13:17,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625984758] [2022-12-12 23:13:17,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625984758] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:13:17,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601248376] [2022-12-12 23:13:17,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 23:13:17,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:13:17,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:13:17,836 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 23:13:17,866 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 23:13:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:13:17,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-12 23:13:17,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:13:17,971 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 18 treesize of output 16 [2022-12-12 23:13:18,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 23:13:18,024 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 6 treesize of output 5 [2022-12-12 23:13:18,053 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 6 treesize of output 5 [2022-12-12 23:13:18,081 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 6 treesize of output 5 [2022-12-12 23:13:18,119 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 22 treesize of output 10 [2022-12-12 23:13:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:13:18,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:13:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:13:18,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601248376] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:13:18,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:13:18,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 4] total 13 [2022-12-12 23:13:18,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150378143] [2022-12-12 23:13:18,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:13:18,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 23:13:18,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:13:18,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 23:13:18,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-12 23:13:18,263 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:13:18,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 3503 transitions, 174822 flow. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 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 23:13:18,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:13:18,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:13:18,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:13:25,891 INFO L130 PetriNetUnfolder]: 6888/10461 cut-off events. [2022-12-12 23:13:25,892 INFO L131 PetriNetUnfolder]: For 82461/82461 co-relation queries the response was YES. [2022-12-12 23:13:25,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264648 conditions, 10461 events. 6888/10461 cut-off events. For 82461/82461 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 64031 event pairs, 0 based on Foata normal form. 2/7626 useless extension candidates. Maximal degree in co-relation 164544. Up to 10311 conditions per place. [2022-12-12 23:13:26,225 INFO L137 encePairwiseOnDemand]: 15/24 looper letters, 3227 selfloop transitions, 268 changer transitions 6/3545 dead transitions. [2022-12-12 23:13:26,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 3545 transitions, 183957 flow [2022-12-12 23:13:26,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:13:26,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:13:26,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2022-12-12 23:13:26,227 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.453125 [2022-12-12 23:13:26,227 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 248 predicate places. [2022-12-12 23:13:26,227 INFO L82 GeneralOperation]: Start removeDead. Operand has 278 places, 3545 transitions, 183957 flow [2022-12-12 23:13:26,365 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 278 places, 3539 transitions, 183633 flow [2022-12-12 23:13:26,365 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 3539 transitions, 183633 flow [2022-12-12 23:13:26,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 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 23:13:26,365 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:13:26,365 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:13:26,372 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 23:13:26,566 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 23:13:26,566 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:13:26,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:13:26,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1947937224, now seen corresponding path program 8 times [2022-12-12 23:13:26,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:13:26,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46946603] [2022-12-12 23:13:26,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:13:26,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:13:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:13:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:13:26,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:13:26,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46946603] [2022-12-12 23:13:26,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46946603] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:13:26,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745938738] [2022-12-12 23:13:26,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:13:26,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:13:26,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:13:26,832 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 23:13:26,858 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 23:13:26,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:13:26,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:13:26,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-12 23:13:26,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:13:27,037 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 22 treesize of output 10 [2022-12-12 23:13:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:13:27,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:13:27,104 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:13:27,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-12-12 23:13:27,113 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-12 23:13:27,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 12 [2022-12-12 23:13:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:13:27,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745938738] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:13:27,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:13:27,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2022-12-12 23:13:27,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675739733] [2022-12-12 23:13:27,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:13:27,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 23:13:27,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:13:27,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 23:13:27,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-12 23:13:27,159 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:13:27,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 3539 transitions, 183633 flow. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 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 23:13:27,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:13:27,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:13:27,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:13:36,863 INFO L130 PetriNetUnfolder]: 7008/10643 cut-off events. [2022-12-12 23:13:36,864 INFO L131 PetriNetUnfolder]: For 95478/95478 co-relation queries the response was YES. [2022-12-12 23:13:36,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279442 conditions, 10643 events. 7008/10643 cut-off events. For 95478/95478 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 65284 event pairs, 11 based on Foata normal form. 2/7746 useless extension candidates. Maximal degree in co-relation 174994. Up to 10493 conditions per place. [2022-12-12 23:13:37,081 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 3330 selfloop transitions, 201 changer transitions 6/3581 dead transitions. [2022-12-12 23:13:37,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 3581 transitions, 192924 flow [2022-12-12 23:13:37,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:13:37,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:13:37,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2022-12-12 23:13:37,082 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2022-12-12 23:13:37,082 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 254 predicate places. [2022-12-12 23:13:37,082 INFO L82 GeneralOperation]: Start removeDead. Operand has 284 places, 3581 transitions, 192924 flow [2022-12-12 23:13:37,230 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 284 places, 3575 transitions, 192588 flow [2022-12-12 23:13:37,231 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 3575 transitions, 192588 flow [2022-12-12 23:13:37,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 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 23:13:37,231 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:13:37,231 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:13:37,236 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 23:13:37,431 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 23:13:37,431 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:13:37,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:13:37,432 INFO L85 PathProgramCache]: Analyzing trace with hash 110696970, now seen corresponding path program 8 times [2022-12-12 23:13:37,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:13:37,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995884224] [2022-12-12 23:13:37,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:13:37,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:13:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:13:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:13:37,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:13:37,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995884224] [2022-12-12 23:13:37,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995884224] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:13:37,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72387567] [2022-12-12 23:13:37,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:13:37,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:13:37,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:13:37,804 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 23:13:37,808 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 23:13:37,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:13:37,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:13:37,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-12 23:13:37,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:13:38,095 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:13:38,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-12-12 23:13:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:13:38,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:13:38,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:13:38,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-12-12 23:13:38,241 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-12 23:13:38,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-12-12 23:13:38,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:13:38,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72387567] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:13:38,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:13:38,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2022-12-12 23:13:38,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860507807] [2022-12-12 23:13:38,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:13:38,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 23:13:38,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:13:38,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 23:13:38,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-12-12 23:13:38,343 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 23:13:38,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 3575 transitions, 192588 flow. Second operand has 23 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 23:13:38,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:13:38,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 23:13:38,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:13:50,194 INFO L130 PetriNetUnfolder]: 7575/11544 cut-off events. [2022-12-12 23:13:50,194 INFO L131 PetriNetUnfolder]: For 99955/99955 co-relation queries the response was YES. [2022-12-12 23:13:50,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314934 conditions, 11544 events. 7575/11544 cut-off events. For 99955/99955 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 72179 event pairs, 15 based on Foata normal form. 4/8379 useless extension candidates. Maximal degree in co-relation 198488. Up to 11362 conditions per place. [2022-12-12 23:13:50,304 INFO L137 encePairwiseOnDemand]: 12/24 looper letters, 3523 selfloop transitions, 453 changer transitions 24/4000 dead transitions. [2022-12-12 23:13:50,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 4000 transitions, 223358 flow [2022-12-12 23:13:50,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-12 23:13:50,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-12 23:13:50,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 240 transitions. [2022-12-12 23:13:50,305 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.30303030303030304 [2022-12-12 23:13:50,306 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 286 predicate places. [2022-12-12 23:13:50,306 INFO L82 GeneralOperation]: Start removeDead. Operand has 316 places, 4000 transitions, 223358 flow [2022-12-12 23:13:50,479 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 316 places, 3976 transitions, 221978 flow [2022-12-12 23:13:50,479 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 3976 transitions, 221978 flow [2022-12-12 23:13:50,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 23:13:50,479 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:13:50,479 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:13:50,485 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 23:13:50,680 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 23:13:50,680 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:13:50,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:13:50,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2029374306, now seen corresponding path program 9 times [2022-12-12 23:13:50,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:13:50,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799001286] [2022-12-12 23:13:50,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:13:50,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:13:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:13:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:13:51,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:13:51,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799001286] [2022-12-12 23:13:51,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799001286] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:13:51,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320227389] [2022-12-12 23:13:51,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:13:51,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:13:51,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:13:51,051 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 23:13:51,053 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 23:13:51,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:13:51,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:13:51,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-12 23:13:51,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:13:51,428 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 22 treesize of output 10 [2022-12-12 23:13:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:13:51,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:13:51,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:13:51,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-12-12 23:13:51,600 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-12 23:13:51,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-12-12 23:13:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:13:51,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320227389] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:13:51,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:13:51,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2022-12-12 23:13:51,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692292376] [2022-12-12 23:13:51,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:13:51,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 23:13:51,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:13:51,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 23:13:51,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-12-12 23:13:51,895 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:13:51,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 3976 transitions, 221978 flow. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 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 23:13:51,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:13:51,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:13:51,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:14:04,565 INFO L130 PetriNetUnfolder]: 7899/12053 cut-off events. [2022-12-12 23:14:04,565 INFO L131 PetriNetUnfolder]: For 105869/105869 co-relation queries the response was YES. [2022-12-12 23:14:04,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340368 conditions, 12053 events. 7899/12053 cut-off events. For 105869/105869 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 76079 event pairs, 4 based on Foata normal form. 5/8739 useless extension candidates. Maximal degree in co-relation 209660. Up to 11855 conditions per place. [2022-12-12 23:14:04,689 INFO L137 encePairwiseOnDemand]: 14/24 looper letters, 3317 selfloop transitions, 792 changer transitions 30/4199 dead transitions. [2022-12-12 23:14:04,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 4199 transitions, 242770 flow [2022-12-12 23:14:04,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 23:14:04,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 23:14:04,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 168 transitions. [2022-12-12 23:14:04,690 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2022-12-12 23:14:04,691 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 301 predicate places. [2022-12-12 23:14:04,691 INFO L82 GeneralOperation]: Start removeDead. Operand has 331 places, 4199 transitions, 242770 flow [2022-12-12 23:14:04,874 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 331 places, 4169 transitions, 240985 flow [2022-12-12 23:14:04,874 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 4169 transitions, 240985 flow [2022-12-12 23:14:04,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 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 23:14:04,875 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:14:04,875 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:14:04,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-12 23:14:05,075 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 23:14:05,075 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:14:05,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:14:05,076 INFO L85 PathProgramCache]: Analyzing trace with hash 483688744, now seen corresponding path program 9 times [2022-12-12 23:14:05,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:14:05,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489555130] [2022-12-12 23:14:05,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:14:05,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:14:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:14:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:14:05,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:14:05,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489555130] [2022-12-12 23:14:05,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489555130] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:14:05,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577548273] [2022-12-12 23:14:05,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:14:05,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:14:05,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:14:05,436 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 23:14:05,439 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 23:14:05,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:14:05,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:14:05,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-12 23:14:05,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:14:05,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 23:14:05,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:14:05,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:14:05,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 23:14:05,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:14:05,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 23:14:05,807 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 22 treesize of output 10 [2022-12-12 23:14:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:14:05,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:14:05,884 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1218 (Array Int Int))) (< (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1218) c_~A~0.base) c_~A~0.offset)) (+ c_~res1~0 1))) (forall ((v_ArrVal_1218 (Array Int Int))) (<= c_~res1~0 (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1218) c_~A~0.base) c_~A~0.offset))))) is different from false [2022-12-12 23:14:08,146 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset))) (and (forall ((v_ArrVal_1218 (Array Int Int)) (v_ArrVal_1217 (Array Int Int))) (< (+ c_~res2~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1217) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1218) c_~A~0.base) c_~A~0.offset)) (+ .cse0 c_~res1~0 1))) (forall ((v_ArrVal_1218 (Array Int Int)) (v_ArrVal_1217 (Array Int Int))) (<= (+ .cse0 c_~res1~0) (+ c_~res2~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1217) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1218) c_~A~0.base) c_~A~0.offset)))))) is different from false [2022-12-12 23:14:08,162 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1218 (Array Int Int)) (v_ArrVal_1217 (Array Int Int)) (v_ArrVal_1216 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1216))) (< (+ c_~res2~0 (select (select (store (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1217) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1218) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (+ (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) c_~res1~0 1)))) (forall ((v_ArrVal_1218 (Array Int Int)) (v_ArrVal_1217 (Array Int Int)) (v_ArrVal_1216 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1216))) (<= (+ (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) c_~res1~0) (+ c_~res2~0 (select (select (store (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1217) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1218) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))))) is different from false [2022-12-12 23:14:08,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:14:08,170 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 51 treesize of output 40 [2022-12-12 23:14:08,173 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 662 treesize of output 598 [2022-12-12 23:14:08,178 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 598 treesize of output 566 [2022-12-12 23:14:08,183 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 566 treesize of output 550 [2022-12-12 23:14:08,186 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 550 treesize of output 518 [2022-12-12 23:14:08,422 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:14:08,423 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 41 [2022-12-12 23:14:08,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:14:08,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:14:08,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 60 [2022-12-12 23:14:08,430 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 60 treesize of output 56 [2022-12-12 23:14:08,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-12 23:14:08,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577548273] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:14:08,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:14:08,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2022-12-12 23:14:08,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755702747] [2022-12-12 23:14:08,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:14:08,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 23:14:08,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:14:08,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 23:14:08,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=307, Unknown=7, NotChecked=114, Total=506 [2022-12-12 23:14:08,475 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:14:08,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 4169 transitions, 240985 flow. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 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 23:14:08,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:14:08,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:14:08,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:14:21,808 INFO L130 PetriNetUnfolder]: 8005/12204 cut-off events. [2022-12-12 23:14:21,808 INFO L131 PetriNetUnfolder]: For 121474/121474 co-relation queries the response was YES. [2022-12-12 23:14:21,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356331 conditions, 12204 events. 8005/12204 cut-off events. For 121474/121474 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 77136 event pairs, 8 based on Foata normal form. 2/8835 useless extension candidates. Maximal degree in co-relation 221194. Up to 12006 conditions per place. [2022-12-12 23:14:21,932 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 3555 selfloop transitions, 606 changer transitions 6/4211 dead transitions. [2022-12-12 23:14:21,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 4211 transitions, 251788 flow [2022-12-12 23:14:21,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:14:21,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:14:21,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2022-12-12 23:14:21,933 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2022-12-12 23:14:21,934 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 308 predicate places. [2022-12-12 23:14:21,934 INFO L82 GeneralOperation]: Start removeDead. Operand has 338 places, 4211 transitions, 251788 flow [2022-12-12 23:14:22,138 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 338 places, 4205 transitions, 251416 flow [2022-12-12 23:14:22,138 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 4205 transitions, 251416 flow [2022-12-12 23:14:22,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 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 23:14:22,138 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:14:22,138 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:14:22,144 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 23:14:22,340 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 23:14:22,341 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:14:22,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:14:22,341 INFO L85 PathProgramCache]: Analyzing trace with hash 908228394, now seen corresponding path program 10 times [2022-12-12 23:14:22,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:14:22,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888187730] [2022-12-12 23:14:22,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:14:22,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:14:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:14:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:14:22,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:14:22,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888187730] [2022-12-12 23:14:22,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888187730] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:14:22,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938311538] [2022-12-12 23:14:22,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:14:22,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:14:22,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:14:22,653 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 23:14:22,655 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 23:14:22,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:14:22,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:14:22,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-12 23:14:22,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:14:22,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:14:22,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 23:14:22,889 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 15 treesize of output 7 [2022-12-12 23:14:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:14:22,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:14:22,961 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_1263 (Array Int Int))) (< (+ c_~res1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1263) c_~A~0.base) .cse0)) (+ c_~res2~0 1))) (forall ((v_ArrVal_1263 (Array Int Int))) (<= c_~res2~0 (+ c_~res1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1263) c_~A~0.base) .cse0)))))) is different from false [2022-12-12 23:14:22,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:14:22,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 42 [2022-12-12 23:14:22,974 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 17 treesize of output 11 [2022-12-12 23:14:22,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:14:22,985 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-12 23:14:22,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 13 [2022-12-12 23:14:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-12-12 23:14:23,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938311538] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:14:23,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:14:23,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-12-12 23:14:23,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117525900] [2022-12-12 23:14:23,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:14:23,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 23:14:23,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:14:23,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 23:14:23,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=303, Unknown=1, NotChecked=36, Total=420 [2022-12-12 23:14:23,071 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:14:23,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 4205 transitions, 251416 flow. Second operand has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:14:23,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:14:23,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:14:23,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:14:40,783 INFO L130 PetriNetUnfolder]: 8177/12458 cut-off events. [2022-12-12 23:14:40,783 INFO L131 PetriNetUnfolder]: For 143650/143650 co-relation queries the response was YES. [2022-12-12 23:14:40,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375672 conditions, 12458 events. 8177/12458 cut-off events. For 143650/143650 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 78943 event pairs, 15 based on Foata normal form. 2/9011 useless extension candidates. Maximal degree in co-relation 235823. Up to 12260 conditions per place. [2022-12-12 23:14:40,913 INFO L137 encePairwiseOnDemand]: 13/24 looper letters, 3987 selfloop transitions, 237 changer transitions 6/4274 dead transitions. [2022-12-12 23:14:40,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 4274 transitions, 264052 flow [2022-12-12 23:14:40,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:14:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:14:40,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2022-12-12 23:14:40,916 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2022-12-12 23:14:40,916 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 315 predicate places. [2022-12-12 23:14:40,916 INFO L82 GeneralOperation]: Start removeDead. Operand has 345 places, 4274 transitions, 264052 flow [2022-12-12 23:14:41,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 345 places, 4268 transitions, 263668 flow [2022-12-12 23:14:41,115 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 4268 transitions, 263668 flow [2022-12-12 23:14:41,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:14:41,115 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:14:41,115 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:14:41,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-12 23:14:41,315 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 23:14:41,316 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:14:41,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:14:41,316 INFO L85 PathProgramCache]: Analyzing trace with hash 318786, now seen corresponding path program 11 times [2022-12-12 23:14:41,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:14:41,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339215622] [2022-12-12 23:14:41,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:14:41,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:14:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:14:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:14:41,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:14:41,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339215622] [2022-12-12 23:14:41,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339215622] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:14:41,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205734891] [2022-12-12 23:14:41,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:14:41,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:14:41,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:14:41,649 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 23:14:41,652 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 23:14:41,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:14:41,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:14:41,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-12 23:14:41,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:14:41,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:14:41,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 23:14:41,949 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 15 treesize of output 7 [2022-12-12 23:14:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:14:41,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:14:42,042 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~A~0.offset (* |c_thread2Thread1of1ForFork1_~i~1#1| 4)))) (and (forall ((v_ArrVal_1308 (Array Int Int))) (< (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1308) c_~A~0.base) .cse0)) (+ c_~res1~0 1))) (forall ((v_ArrVal_1308 (Array Int Int))) (<= c_~res1~0 (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1308) c_~A~0.base) .cse0)))))) is different from false [2022-12-12 23:14:42,051 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:14:42,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 44 [2022-12-12 23:14:42,054 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 18 treesize of output 12 [2022-12-12 23:14:42,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:14:42,072 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-12 23:14:42,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 12 [2022-12-12 23:14:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:14:42,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205734891] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:14:42,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:14:42,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-12-12 23:14:42,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343109152] [2022-12-12 23:14:42,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:14:42,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 23:14:42,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:14:42,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 23:14:42,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=295, Unknown=1, NotChecked=36, Total=420 [2022-12-12 23:14:42,170 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:14:42,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 4268 transitions, 263668 flow. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 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 23:14:42,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:14:42,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:14:42,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:14:58,583 INFO L130 PetriNetUnfolder]: 8289/12628 cut-off events. [2022-12-12 23:14:58,583 INFO L131 PetriNetUnfolder]: For 164506/164506 co-relation queries the response was YES. [2022-12-12 23:14:58,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 392897 conditions, 12628 events. 8289/12628 cut-off events. For 164506/164506 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 80215 event pairs, 4 based on Foata normal form. 2/9123 useless extension candidates. Maximal degree in co-relation 248320. Up to 12430 conditions per place. [2022-12-12 23:14:58,725 INFO L137 encePairwiseOnDemand]: 17/24 looper letters, 3953 selfloop transitions, 306 changer transitions 6/4309 dead transitions. [2022-12-12 23:14:58,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 4309 transitions, 274773 flow [2022-12-12 23:14:58,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:14:58,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:14:58,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 85 transitions. [2022-12-12 23:14:58,726 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2022-12-12 23:14:58,727 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 321 predicate places. [2022-12-12 23:14:58,727 INFO L82 GeneralOperation]: Start removeDead. Operand has 351 places, 4309 transitions, 274773 flow [2022-12-12 23:14:58,939 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 351 places, 4303 transitions, 274377 flow [2022-12-12 23:14:58,940 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 4303 transitions, 274377 flow [2022-12-12 23:14:58,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 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 23:14:58,940 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:14:58,940 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:14:58,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-12 23:14:59,141 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 23:14:59,141 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:14:59,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:14:59,141 INFO L85 PathProgramCache]: Analyzing trace with hash 519219148, now seen corresponding path program 12 times [2022-12-12 23:14:59,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:14:59,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925490424] [2022-12-12 23:14:59,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:14:59,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:14:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:14:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:14:59,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:14:59,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925490424] [2022-12-12 23:14:59,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925490424] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:14:59,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143878763] [2022-12-12 23:14:59,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:14:59,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:14:59,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:14:59,435 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 23:14:59,436 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 23:14:59,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 23:14:59,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:14:59,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-12 23:14:59,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:14:59,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:14:59,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 23:14:59,709 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 22 treesize of output 10 [2022-12-12 23:14:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:14:59,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:14:59,793 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1353 (Array Int Int))) (<= c_~res2~0 (+ c_~res1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1353) c_~A~0.base) c_~A~0.offset)))) (forall ((v_ArrVal_1353 (Array Int Int))) (< (+ c_~res1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1353) c_~A~0.base) c_~A~0.offset)) (+ c_~res2~0 1)))) is different from false [2022-12-12 23:14:59,806 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:14:59,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 38 [2022-12-12 23:14:59,810 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 14 treesize of output 12 [2022-12-12 23:14:59,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:14:59,825 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-12 23:14:59,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-12-12 23:15:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-12-12 23:15:00,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143878763] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:15:00,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:15:00,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-12 23:15:00,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082284490] [2022-12-12 23:15:00,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:15:00,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 23:15:00,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:15:00,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 23:15:00,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=242, Unknown=1, NotChecked=32, Total=342 [2022-12-12 23:15:00,047 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:15:00,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 4303 transitions, 274377 flow. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 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 23:15:00,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:15:00,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:15:00,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:15:16,914 INFO L130 PetriNetUnfolder]: 8401/12798 cut-off events. [2022-12-12 23:15:16,914 INFO L131 PetriNetUnfolder]: For 187864/187864 co-relation queries the response was YES. [2022-12-12 23:15:16,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410434 conditions, 12798 events. 8401/12798 cut-off events. For 187864/187864 co-relation queries the response was YES. Maximal size of possible extension queue 753. Compared 81517 event pairs, 4 based on Foata normal form. 2/9235 useless extension candidates. Maximal degree in co-relation 261113. Up to 12600 conditions per place. [2022-12-12 23:15:17,054 INFO L137 encePairwiseOnDemand]: 17/24 looper letters, 4031 selfloop transitions, 263 changer transitions 6/4344 dead transitions. [2022-12-12 23:15:17,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 4344 transitions, 285634 flow [2022-12-12 23:15:17,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:15:17,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:15:17,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2022-12-12 23:15:17,056 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2022-12-12 23:15:17,056 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 327 predicate places. [2022-12-12 23:15:17,056 INFO L82 GeneralOperation]: Start removeDead. Operand has 357 places, 4344 transitions, 285634 flow [2022-12-12 23:15:17,268 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 357 places, 4338 transitions, 285226 flow [2022-12-12 23:15:17,268 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 4338 transitions, 285226 flow [2022-12-12 23:15:17,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 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 23:15:17,268 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:15:17,269 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:15:17,273 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 23:15:17,469 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 23:15:17,469 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:15:17,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:15:17,470 INFO L85 PathProgramCache]: Analyzing trace with hash -381490512, now seen corresponding path program 1 times [2022-12-12 23:15:17,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:15:17,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164097843] [2022-12-12 23:15:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:15:17,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:15:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:15:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:15:17,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:15:17,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164097843] [2022-12-12 23:15:17,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164097843] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:15:17,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750072676] [2022-12-12 23:15:17,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:15:17,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:15:17,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:15:17,552 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 23:15:17,578 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 23:15:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:15:17,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 23:15:17,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:15:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:15:17,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:15:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:15:17,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750072676] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:15:17,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:15:17,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-12 23:15:17,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050832950] [2022-12-12 23:15:17,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:15:17,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-12 23:15:17,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:15:17,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-12 23:15:17,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-12-12 23:15:17,822 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:15:17,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 4338 transitions, 285226 flow. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 23:15:17,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:15:17,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:15:17,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:15:44,505 INFO L130 PetriNetUnfolder]: 11658/17837 cut-off events. [2022-12-12 23:15:44,505 INFO L131 PetriNetUnfolder]: For 272856/272856 co-relation queries the response was YES. [2022-12-12 23:15:44,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589610 conditions, 17837 events. 11658/17837 cut-off events. For 272856/272856 co-relation queries the response was YES. Maximal size of possible extension queue 1055. Compared 119975 event pairs, 16 based on Foata normal form. 0/12816 useless extension candidates. Maximal degree in co-relation 303726. Up to 17541 conditions per place. [2022-12-12 23:15:44,707 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 5038 selfloop transitions, 479 changer transitions 52/5622 dead transitions. [2022-12-12 23:15:44,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 5622 transitions, 381108 flow [2022-12-12 23:15:44,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 23:15:44,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 23:15:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2022-12-12 23:15:44,708 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4548611111111111 [2022-12-12 23:15:44,709 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 338 predicate places. [2022-12-12 23:15:44,709 INFO L82 GeneralOperation]: Start removeDead. Operand has 368 places, 5622 transitions, 381108 flow [2022-12-12 23:15:45,109 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 368 places, 5570 transitions, 377494 flow [2022-12-12 23:15:45,109 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 5570 transitions, 377494 flow [2022-12-12 23:15:45,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 23:15:45,110 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:15:45,110 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:15:45,114 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 23:15:45,310 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 23:15:45,310 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:15:45,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:15:45,311 INFO L85 PathProgramCache]: Analyzing trace with hash -50372498, now seen corresponding path program 13 times [2022-12-12 23:15:45,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:15:45,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655179150] [2022-12-12 23:15:45,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:15:45,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:15:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:15:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:15:45,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:15:45,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655179150] [2022-12-12 23:15:45,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655179150] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:15:45,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785522643] [2022-12-12 23:15:45,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 23:15:45,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:15:45,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:15:45,420 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 23:15:45,422 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 23:15:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:15:45,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-12 23:15:45,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:15:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:15:45,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:15:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:15:45,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785522643] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:15:45,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:15:45,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-12-12 23:15:45,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946411608] [2022-12-12 23:15:45,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:15:45,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 23:15:45,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:15:45,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 23:15:45,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-12-12 23:15:45,679 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:15:45,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 5570 transitions, 377494 flow. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 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 23:15:45,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:15:45,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:15:45,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:16:27,020 INFO L130 PetriNetUnfolder]: 10824/16853 cut-off events. [2022-12-12 23:16:27,020 INFO L131 PetriNetUnfolder]: For 261118/261118 co-relation queries the response was YES. [2022-12-12 23:16:27,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573508 conditions, 16853 events. 10824/16853 cut-off events. For 261118/261118 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 116069 event pairs, 10 based on Foata normal form. 0/12540 useless extension candidates. Maximal degree in co-relation 283758. Up to 16589 conditions per place. [2022-12-12 23:16:27,224 INFO L137 encePairwiseOnDemand]: 18/24 looper letters, 4923 selfloop transitions, 505 changer transitions 369/5850 dead transitions. [2022-12-12 23:16:27,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 5850 transitions, 408068 flow [2022-12-12 23:16:27,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 23:16:27,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 23:16:27,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2022-12-12 23:16:27,226 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4675925925925926 [2022-12-12 23:16:27,226 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 346 predicate places. [2022-12-12 23:16:27,226 INFO L82 GeneralOperation]: Start removeDead. Operand has 376 places, 5850 transitions, 408068 flow [2022-12-12 23:16:27,632 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 376 places, 5481 transitions, 381869 flow [2022-12-12 23:16:27,632 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 5481 transitions, 381869 flow [2022-12-12 23:16:27,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 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 23:16:27,633 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:16:27,633 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:16:27,638 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 23:16:27,833 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 23:16:27,833 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:16:27,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:16:27,834 INFO L85 PathProgramCache]: Analyzing trace with hash 553677332, now seen corresponding path program 2 times [2022-12-12 23:16:27,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:16:27,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445503546] [2022-12-12 23:16:27,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:16:27,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:16:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:16:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:16:27,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:16:27,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445503546] [2022-12-12 23:16:27,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445503546] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:16:27,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592421042] [2022-12-12 23:16:27,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:16:27,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:16:27,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:16:27,929 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 23:16:27,936 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 23:16:28,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:16:28,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:16:28,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 23:16:28,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:16:28,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:16:28,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:16:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:16:28,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592421042] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:16:28,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:16:28,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-12 23:16:28,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527885281] [2022-12-12 23:16:28,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:16:28,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 23:16:28,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:16:28,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 23:16:28,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-12-12 23:16:28,232 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:16:28,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 5481 transitions, 381869 flow. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 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 23:16:28,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:16:28,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:16:28,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:17:19,973 INFO L130 PetriNetUnfolder]: 11967/19278 cut-off events. [2022-12-12 23:17:19,973 INFO L131 PetriNetUnfolder]: For 259143/259143 co-relation queries the response was YES. [2022-12-12 23:17:19,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672334 conditions, 19278 events. 11967/19278 cut-off events. For 259143/259143 co-relation queries the response was YES. Maximal size of possible extension queue 1273. Compared 143126 event pairs, 10 based on Foata normal form. 0/14633 useless extension candidates. Maximal degree in co-relation 333962. Up to 18944 conditions per place. [2022-12-12 23:17:20,213 INFO L137 encePairwiseOnDemand]: 14/24 looper letters, 5816 selfloop transitions, 989 changer transitions 50/6908 dead transitions. [2022-12-12 23:17:20,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 6908 transitions, 495118 flow [2022-12-12 23:17:20,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 23:17:20,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-12 23:17:20,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 222 transitions. [2022-12-12 23:17:20,214 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4625 [2022-12-12 23:17:20,215 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 365 predicate places. [2022-12-12 23:17:20,215 INFO L82 GeneralOperation]: Start removeDead. Operand has 395 places, 6908 transitions, 495118 flow [2022-12-12 23:17:20,597 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 395 places, 6858 transitions, 491458 flow [2022-12-12 23:17:20,598 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 6858 transitions, 491458 flow [2022-12-12 23:17:20,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 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 23:17:20,598 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:17:20,598 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:17:20,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-12 23:17:20,798 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 23:17:20,799 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:17:20,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:17:20,799 INFO L85 PathProgramCache]: Analyzing trace with hash -135723088, now seen corresponding path program 3 times [2022-12-12 23:17:20,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:17:20,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541201898] [2022-12-12 23:17:20,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:17:20,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:17:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:17:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:17:20,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:17:20,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541201898] [2022-12-12 23:17:20,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541201898] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:17:20,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599690629] [2022-12-12 23:17:20,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:17:20,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:17:20,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:17:20,896 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 23:17:20,919 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 23:17:21,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 23:17:21,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:17:21,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 23:17:21,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:17:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:17:21,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:17:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:17:21,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599690629] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:17:21,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:17:21,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-12 23:17:21,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136249512] [2022-12-12 23:17:21,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:17:21,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 23:17:21,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:17:21,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 23:17:21,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-12-12 23:17:21,226 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:17:21,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 6858 transitions, 491458 flow. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 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 23:17:21,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:17:21,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:17:21,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:18:27,986 INFO L130 PetriNetUnfolder]: 12136/19557 cut-off events. [2022-12-12 23:18:27,986 INFO L131 PetriNetUnfolder]: For 275145/275145 co-relation queries the response was YES. [2022-12-12 23:18:28,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 701545 conditions, 19557 events. 12136/19557 cut-off events. For 275145/275145 co-relation queries the response was YES. Maximal size of possible extension queue 1316. Compared 145711 event pairs, 10 based on Foata normal form. 0/14919 useless extension candidates. Maximal degree in co-relation 341909. Up to 19219 conditions per place. [2022-12-12 23:18:28,241 INFO L137 encePairwiseOnDemand]: 15/24 looper letters, 6372 selfloop transitions, 1002 changer transitions 48/7475 dead transitions. [2022-12-12 23:18:28,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 7475 transitions, 550531 flow [2022-12-12 23:18:28,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-12 23:18:28,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-12 23:18:28,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 195 transitions. [2022-12-12 23:18:28,243 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4276315789473684 [2022-12-12 23:18:28,243 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 383 predicate places. [2022-12-12 23:18:28,243 INFO L82 GeneralOperation]: Start removeDead. Operand has 413 places, 7475 transitions, 550531 flow [2022-12-12 23:18:28,654 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 413 places, 7427 transitions, 546931 flow [2022-12-12 23:18:28,655 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 7427 transitions, 546931 flow [2022-12-12 23:18:28,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 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 23:18:28,655 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:18:28,655 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:18:28,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-12 23:18:28,855 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 23:18:28,856 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:18:28,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:18:28,856 INFO L85 PathProgramCache]: Analyzing trace with hash 76375384, now seen corresponding path program 4 times [2022-12-12 23:18:28,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:18:28,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776300542] [2022-12-12 23:18:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:18:28,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:18:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:18:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:18:28,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:18:28,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776300542] [2022-12-12 23:18:28,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776300542] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:18:28,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892049289] [2022-12-12 23:18:28,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:18:28,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:18:28,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:18:28,940 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 23:18:28,946 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 23:18:29,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:18:29,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:18:29,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 23:18:29,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:18:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:18:29,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:18:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:18:29,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892049289] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:18:29,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:18:29,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-12 23:18:29,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882529594] [2022-12-12 23:18:29,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:18:29,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-12 23:18:29,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:18:29,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-12 23:18:29,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-12-12 23:18:29,225 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:18:29,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 7427 transitions, 546931 flow. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 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 23:18:29,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:18:29,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:18:29,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:19:49,202 INFO L130 PetriNetUnfolder]: 12545/20472 cut-off events. [2022-12-12 23:19:49,202 INFO L131 PetriNetUnfolder]: For 284280/284280 co-relation queries the response was YES. [2022-12-12 23:19:49,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755217 conditions, 20472 events. 12545/20472 cut-off events. For 284280/284280 co-relation queries the response was YES. Maximal size of possible extension queue 1415. Compared 157067 event pairs, 6 based on Foata normal form. 0/15776 useless extension candidates. Maximal degree in co-relation 383298. Up to 20106 conditions per place. [2022-12-12 23:19:49,463 INFO L137 encePairwiseOnDemand]: 15/24 looper letters, 6877 selfloop transitions, 879 changer transitions 135/7944 dead transitions. [2022-12-12 23:19:49,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 7944 transitions, 601164 flow [2022-12-12 23:19:49,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 23:19:49,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 23:19:49,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 144 transitions. [2022-12-12 23:19:49,464 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2022-12-12 23:19:49,465 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 396 predicate places. [2022-12-12 23:19:49,465 INFO L82 GeneralOperation]: Start removeDead. Operand has 426 places, 7944 transitions, 601164 flow [2022-12-12 23:19:49,898 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 426 places, 7809 transitions, 590769 flow [2022-12-12 23:19:49,898 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 7809 transitions, 590769 flow [2022-12-12 23:19:49,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 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 23:19:49,898 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:19:49,898 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:19:49,903 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 23:19:50,099 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 23:19:50,099 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:19:50,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:19:50,099 INFO L85 PathProgramCache]: Analyzing trace with hash -180851004, now seen corresponding path program 5 times [2022-12-12 23:19:50,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:19:50,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439755761] [2022-12-12 23:19:50,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:19:50,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:19:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:19:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:19:50,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:19:50,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439755761] [2022-12-12 23:19:50,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439755761] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:19:50,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883466690] [2022-12-12 23:19:50,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:19:50,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:19:50,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:19:50,204 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 23:19:50,207 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 23:19:50,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:19:50,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:19:50,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 23:19:50,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:19:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:19:50,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:19:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:19:50,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883466690] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:19:50,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:19:50,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-12 23:19:50,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950864549] [2022-12-12 23:19:50,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:19:50,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 23:19:50,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:19:50,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 23:19:50,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-12-12 23:19:50,472 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:19:50,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 7809 transitions, 590769 flow. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 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 23:19:50,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:19:50,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:19:50,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:21:13,857 INFO L130 PetriNetUnfolder]: 12363/20320 cut-off events. [2022-12-12 23:21:13,857 INFO L131 PetriNetUnfolder]: For 295473/295473 co-relation queries the response was YES. [2022-12-12 23:21:13,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769416 conditions, 20320 events. 12363/20320 cut-off events. For 295473/295473 co-relation queries the response was YES. Maximal size of possible extension queue 1432. Compared 157366 event pairs, 6 based on Foata normal form. 0/15880 useless extension candidates. Maximal degree in co-relation 388468. Up to 19950 conditions per place. [2022-12-12 23:21:14,209 INFO L137 encePairwiseOnDemand]: 15/24 looper letters, 6760 selfloop transitions, 1023 changer transitions 45/7881 dead transitions. [2022-12-12 23:21:14,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 7881 transitions, 611924 flow [2022-12-12 23:21:14,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 23:21:14,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 23:21:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 174 transitions. [2022-12-12 23:21:14,211 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4264705882352941 [2022-12-12 23:21:14,211 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 412 predicate places. [2022-12-12 23:21:14,211 INFO L82 GeneralOperation]: Start removeDead. Operand has 442 places, 7881 transitions, 611924 flow [2022-12-12 23:21:14,687 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 442 places, 7836 transitions, 608369 flow [2022-12-12 23:21:14,688 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 7836 transitions, 608369 flow [2022-12-12 23:21:14,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 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 23:21:14,688 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:21:14,688 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:21:14,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-12 23:21:14,888 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 23:21:14,889 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:21:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:21:14,889 INFO L85 PathProgramCache]: Analyzing trace with hash -516782272, now seen corresponding path program 6 times [2022-12-12 23:21:14,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:21:14,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547910311] [2022-12-12 23:21:14,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:21:14,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:21:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:21:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:21:14,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:21:14,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547910311] [2022-12-12 23:21:14,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547910311] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:21:14,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621329134] [2022-12-12 23:21:14,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:21:14,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:21:14,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:21:14,992 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 23:21:14,994 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 23:21:15,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 23:21:15,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:21:15,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 23:21:15,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:21:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:21:15,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:21:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:21:15,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621329134] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:21:15,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:21:15,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-12 23:21:15,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628528313] [2022-12-12 23:21:15,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:21:15,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 23:21:15,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:21:15,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 23:21:15,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-12-12 23:21:15,303 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:21:15,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 7836 transitions, 608369 flow. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 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 23:21:15,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:21:15,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:21:15,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:22:36,162 INFO L130 PetriNetUnfolder]: 12384/20423 cut-off events. [2022-12-12 23:22:36,162 INFO L131 PetriNetUnfolder]: For 303854/303854 co-relation queries the response was YES. [2022-12-12 23:22:36,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 793485 conditions, 20423 events. 12384/20423 cut-off events. For 303854/303854 co-relation queries the response was YES. Maximal size of possible extension queue 1479. Compared 159452 event pairs, 6 based on Foata normal form. 0/16067 useless extension candidates. Maximal degree in co-relation 400506. Up to 20053 conditions per place. [2022-12-12 23:22:36,460 INFO L137 encePairwiseOnDemand]: 14/24 looper letters, 6879 selfloop transitions, 929 changer transitions 64/7925 dead transitions. [2022-12-12 23:22:36,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 7925 transitions, 631094 flow [2022-12-12 23:22:36,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 23:22:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 23:22:36,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 155 transitions. [2022-12-12 23:22:36,462 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2022-12-12 23:22:36,464 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 424 predicate places. [2022-12-12 23:22:36,464 INFO L82 GeneralOperation]: Start removeDead. Operand has 454 places, 7925 transitions, 631094 flow [2022-12-12 23:22:37,283 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 454 places, 7861 transitions, 625902 flow [2022-12-12 23:22:37,283 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 7861 transitions, 625902 flow [2022-12-12 23:22:37,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 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 23:22:37,283 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:22:37,283 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:22:37,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-12 23:22:37,490 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 23:22:37,490 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:22:37,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:22:37,490 INFO L85 PathProgramCache]: Analyzing trace with hash -692018513, now seen corresponding path program 10 times [2022-12-12 23:22:37,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:22:37,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694082138] [2022-12-12 23:22:37,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:22:37,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:22:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:22:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:22:37,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:22:37,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694082138] [2022-12-12 23:22:37,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694082138] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:22:37,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807844203] [2022-12-12 23:22:37,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:22:37,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:22:37,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:22:37,655 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 23:22:37,657 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 23:22:37,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:22:37,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:22:37,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:22:37,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:22:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:22:37,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:22:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:22:37,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807844203] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:22:37,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:22:37,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-12-12 23:22:37,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326910263] [2022-12-12 23:22:37,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:22:37,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 23:22:37,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:22:37,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 23:22:37,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-12-12 23:22:37,905 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 24 [2022-12-12 23:22:37,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 7861 transitions, 625902 flow. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 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 23:22:37,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:22:37,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 24 [2022-12-12 23:22:37,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:23:54,707 INFO L130 PetriNetUnfolder]: 10418/18013 cut-off events. [2022-12-12 23:23:54,707 INFO L131 PetriNetUnfolder]: For 328161/328161 co-relation queries the response was YES. [2022-12-12 23:23:54,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 714527 conditions, 18013 events. 10418/18013 cut-off events. For 328161/328161 co-relation queries the response was YES. Maximal size of possible extension queue 1373. Compared 147956 event pairs, 0 based on Foata normal form. 918/15221 useless extension candidates. Maximal degree in co-relation 324086. Up to 17643 conditions per place. [2022-12-12 23:23:55,055 INFO L137 encePairwiseOnDemand]: 18/24 looper letters, 5379 selfloop transitions, 425 changer transitions 1792/7725 dead transitions. [2022-12-12 23:23:55,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 7725 transitions, 629956 flow [2022-12-12 23:23:55,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:23:55,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:23:55,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2022-12-12 23:23:55,056 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2022-12-12 23:23:55,056 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 427 predicate places. [2022-12-12 23:23:55,056 INFO L82 GeneralOperation]: Start removeDead. Operand has 457 places, 7725 transitions, 629956 flow [2022-12-12 23:23:55,386 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 408 places, 5933 transitions, 484598 flow [2022-12-12 23:23:55,386 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 5933 transitions, 484598 flow [2022-12-12 23:23:55,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 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 23:23:55,387 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:23:55,387 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:23:55,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-12-12 23:23:55,587 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 23:23:55,588 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:23:55,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:23:55,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1727019186, now seen corresponding path program 11 times [2022-12-12 23:23:55,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:23:55,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580056294] [2022-12-12 23:23:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:23:55,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:23:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:23:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:23:55,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:23:55,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580056294] [2022-12-12 23:23:55,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580056294] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:23:55,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686541254] [2022-12-12 23:23:55,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:23:55,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:23:55,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:23:55,720 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 23:23:55,725 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 23:23:55,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:23:55,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:23:55,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-12 23:23:55,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:23:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:23:55,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:23:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:23:56,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686541254] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:23:56,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:23:56,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-12-12 23:23:56,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863876666] [2022-12-12 23:23:56,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:23:56,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 23:23:56,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:23:56,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 23:23:56,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-12-12 23:23:56,041 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 24 [2022-12-12 23:23:56,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 5933 transitions, 484598 flow. Second operand has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 0 states have call successors, (0), 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 23:23:56,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:23:56,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 24 [2022-12-12 23:23:56,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:24:33,926 INFO L130 PetriNetUnfolder]: 6545/10511 cut-off events. [2022-12-12 23:24:33,927 INFO L131 PetriNetUnfolder]: For 241642/241642 co-relation queries the response was YES. [2022-12-12 23:24:33,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424138 conditions, 10511 events. 6545/10511 cut-off events. For 241642/241642 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 70736 event pairs, 0 based on Foata normal form. 492/8961 useless extension candidates. Maximal degree in co-relation 280741. Up to 10317 conditions per place. [2022-12-12 23:24:34,060 INFO L137 encePairwiseOnDemand]: 18/24 looper letters, 3669 selfloop transitions, 217 changer transitions 1028/4972 dead transitions. [2022-12-12 23:24:34,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 4972 transitions, 415309 flow [2022-12-12 23:24:34,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:24:34,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:24:34,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 82 transitions. [2022-12-12 23:24:34,061 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2022-12-12 23:24:34,061 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 366 predicate places. [2022-12-12 23:24:34,061 INFO L82 GeneralOperation]: Start removeDead. Operand has 396 places, 4972 transitions, 415309 flow [2022-12-12 23:24:34,437 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 309 places, 3944 transitions, 329720 flow [2022-12-12 23:24:34,437 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 3944 transitions, 329720 flow [2022-12-12 23:24:34,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 0 states have call successors, (0), 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 23:24:34,438 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:24:34,438 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:24:34,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-12-12 23:24:34,638 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 23:24:34,638 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:24:34,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:24:34,639 INFO L85 PathProgramCache]: Analyzing trace with hash 175523621, now seen corresponding path program 12 times [2022-12-12 23:24:34,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:24:34,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142230974] [2022-12-12 23:24:34,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:24:34,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:24:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:24:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:24:34,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:24:34,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142230974] [2022-12-12 23:24:34,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142230974] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:24:34,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770030925] [2022-12-12 23:24:34,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:24:34,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:24:34,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:24:34,709 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 23:24:34,734 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 23:24:34,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 23:24:34,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:24:34,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 23:24:34,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:24:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:24:34,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:24:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:24:34,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770030925] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:24:34,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:24:34,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 18 [2022-12-12 23:24:34,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607446301] [2022-12-12 23:24:34,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:24:35,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 23:24:35,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:24:35,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 23:24:35,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-12-12 23:24:35,000 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 23:24:35,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 3944 transitions, 329720 flow. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 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 23:24:35,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:24:35,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 23:24:35,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:24:49,958 INFO L130 PetriNetUnfolder]: 3292/4859 cut-off events. [2022-12-12 23:24:49,959 INFO L131 PetriNetUnfolder]: For 108887/108887 co-relation queries the response was YES. [2022-12-12 23:24:49,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201530 conditions, 4859 events. 3292/4859 cut-off events. For 108887/108887 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 24845 event pairs, 2 based on Foata normal form. 0/3803 useless extension candidates. Maximal degree in co-relation 186146. Up to 4711 conditions per place. [2022-12-12 23:24:50,030 INFO L137 encePairwiseOnDemand]: 13/24 looper letters, 1616 selfloop transitions, 783 changer transitions 0/2399 dead transitions. [2022-12-12 23:24:50,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 2399 transitions, 203157 flow [2022-12-12 23:24:50,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-12 23:24:50,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-12 23:24:50,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 148 transitions. [2022-12-12 23:24:50,031 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.32456140350877194 [2022-12-12 23:24:50,032 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 292 predicate places. [2022-12-12 23:24:50,032 INFO L82 GeneralOperation]: Start removeDead. Operand has 322 places, 2399 transitions, 203157 flow [2022-12-12 23:24:50,150 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 322 places, 2399 transitions, 203157 flow [2022-12-12 23:24:50,150 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 2399 transitions, 203157 flow [2022-12-12 23:24:50,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 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 23:24:50,150 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:24:50,150 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:24:50,156 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 23:24:50,351 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 23:24:50,351 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:24:50,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:24:50,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1439941818, now seen corresponding path program 14 times [2022-12-12 23:24:50,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:24:50,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9666842] [2022-12-12 23:24:50,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:24:50,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:24:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:24:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:24:50,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:24:50,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9666842] [2022-12-12 23:24:50,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9666842] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:24:50,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554303969] [2022-12-12 23:24:50,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:24:50,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:24:50,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:24:50,600 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 23:24:50,602 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 23:24:50,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:24:50,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:24:50,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 23:24:50,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:24:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:24:50,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:24:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:24:50,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554303969] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:24:50,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:24:50,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-12 23:24:50,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502603822] [2022-12-12 23:24:50,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:24:50,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 23:24:50,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:24:50,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 23:24:50,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-12-12 23:24:50,934 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:24:50,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 2399 transitions, 203157 flow. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 23:24:50,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:24:50,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:24:50,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:24:56,619 INFO L130 PetriNetUnfolder]: 4078/6092 cut-off events. [2022-12-12 23:24:56,619 INFO L131 PetriNetUnfolder]: For 122607/122607 co-relation queries the response was YES. [2022-12-12 23:24:56,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259763 conditions, 6092 events. 4078/6092 cut-off events. For 122607/122607 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 32699 event pairs, 2 based on Foata normal form. 0/4739 useless extension candidates. Maximal degree in co-relation 236968. Up to 5918 conditions per place. [2022-12-12 23:24:56,703 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 2346 selfloop transitions, 671 changer transitions 0/3051 dead transitions. [2022-12-12 23:24:56,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 3051 transitions, 265233 flow [2022-12-12 23:24:56,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 23:24:56,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 23:24:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 131 transitions. [2022-12-12 23:24:56,704 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4198717948717949 [2022-12-12 23:24:56,705 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 304 predicate places. [2022-12-12 23:24:56,705 INFO L82 GeneralOperation]: Start removeDead. Operand has 334 places, 3051 transitions, 265233 flow [2022-12-12 23:24:56,848 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 334 places, 3051 transitions, 265233 flow [2022-12-12 23:24:56,848 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 3051 transitions, 265233 flow [2022-12-12 23:24:56,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 23:24:56,848 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:24:56,849 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:24:56,854 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 23:24:57,049 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 23:24:57,049 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:24:57,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:24:57,050 INFO L85 PathProgramCache]: Analyzing trace with hash -961563066, now seen corresponding path program 13 times [2022-12-12 23:24:57,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:24:57,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564080918] [2022-12-12 23:24:57,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:24:57,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:24:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:24:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:24:57,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:24:57,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564080918] [2022-12-12 23:24:57,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564080918] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:24:57,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159720065] [2022-12-12 23:24:57,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 23:24:57,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:24:57,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:24:57,160 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 23:24:57,163 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 23:24:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:24:57,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 23:24:57,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:24:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:24:57,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:24:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:24:57,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159720065] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:24:57,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:24:57,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-12-12 23:24:57,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452750648] [2022-12-12 23:24:57,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:24:57,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 23:24:57,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:24:57,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 23:24:57,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-12-12 23:24:57,563 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:24:57,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 3051 transitions, 265233 flow. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 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 23:24:57,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:24:57,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:24:57,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:25:07,273 INFO L130 PetriNetUnfolder]: 5274/7914 cut-off events. [2022-12-12 23:25:07,273 INFO L131 PetriNetUnfolder]: For 136559/136559 co-relation queries the response was YES. [2022-12-12 23:25:07,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346042 conditions, 7914 events. 5274/7914 cut-off events. For 136559/136559 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 43918 event pairs, 2 based on Foata normal form. 0/6032 useless extension candidates. Maximal degree in co-relation 317826. Up to 7669 conditions per place. [2022-12-12 23:25:07,389 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 3188 selfloop transitions, 752 changer transitions 0/3974 dead transitions. [2022-12-12 23:25:07,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 3974 transitions, 354424 flow [2022-12-12 23:25:07,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-12 23:25:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-12 23:25:07,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 182 transitions. [2022-12-12 23:25:07,390 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4212962962962963 [2022-12-12 23:25:07,391 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 321 predicate places. [2022-12-12 23:25:07,391 INFO L82 GeneralOperation]: Start removeDead. Operand has 351 places, 3974 transitions, 354424 flow [2022-12-12 23:25:07,688 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 351 places, 3974 transitions, 354424 flow [2022-12-12 23:25:07,688 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 3974 transitions, 354424 flow [2022-12-12 23:25:07,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 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 23:25:07,689 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:25:07,689 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:25:07,694 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 23:25:07,889 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 23:25:07,890 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:25:07,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:25:07,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1454971556, now seen corresponding path program 15 times [2022-12-12 23:25:07,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:25:07,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122155736] [2022-12-12 23:25:07,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:25:07,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:25:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:25:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:25:07,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:25:07,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122155736] [2022-12-12 23:25:07,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122155736] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:25:07,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457713105] [2022-12-12 23:25:07,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:25:07,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:25:07,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:25:07,999 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 23:25:08,001 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 23:25:08,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:25:08,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:25:08,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 23:25:08,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:25:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:25:08,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:25:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 23:25:08,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457713105] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:25:08,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:25:08,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-12-12 23:25:08,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013586324] [2022-12-12 23:25:08,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:25:08,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 23:25:08,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:25:08,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 23:25:08,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-12-12 23:25:08,294 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:25:08,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 3974 transitions, 354424 flow. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 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 23:25:08,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:25:08,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:25:08,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-12-12 23:25:24,156 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 23:25:24,157 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 23:25:24,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 23:25:24,167 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-12-12 23:25:24,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-12 23:25:24,367 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 23:25:24,368 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (18states, 1/24 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 322912 conditions, 7243 events (4921/7242 cut-off events. For 137903/137903 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 40442 event pairs, 2 based on Foata normal form. 0/5651 useless extension candidates. Maximal degree in co-relation 305935. Up to 6997 conditions per place.). [2022-12-12 23:25:24,369 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-12-12 23:25:24,369 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-12-12 23:25:24,369 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-12-12 23:25:24,370 INFO L445 BasicCegarLoop]: Path program histogram: [15, 13, 6, 6, 1, 1, 1, 1, 1] [2022-12-12 23:25:24,373 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 23:25:24,373 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 23:25:24,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 11:25:24 BasicIcfg [2022-12-12 23:25:24,375 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 23:25:24,375 INFO L158 Benchmark]: Toolchain (without parser) took 819945.32ms. Allocated memory was 177.2MB in the beginning and 2.9GB in the end (delta: 2.7GB). Free memory was 152.3MB in the beginning and 444.4MB in the end (delta: -292.1MB). Peak memory consumption was 2.6GB. Max. memory is 8.0GB. [2022-12-12 23:25:24,375 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 177.2MB. Free memory was 153.0MB in the beginning and 152.9MB in the end (delta: 90.7kB). There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 23:25:24,375 INFO L158 Benchmark]: CACSL2BoogieTranslator took 297.36ms. Allocated memory is still 177.2MB. Free memory was 152.3MB in the beginning and 139.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-12-12 23:25:24,376 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.00ms. Allocated memory is still 177.2MB. Free memory was 139.7MB in the beginning and 137.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 23:25:24,376 INFO L158 Benchmark]: Boogie Preprocessor took 47.85ms. Allocated memory is still 177.2MB. Free memory was 137.6MB in the beginning and 136.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-12 23:25:24,376 INFO L158 Benchmark]: RCFGBuilder took 597.11ms. Allocated memory is still 177.2MB. Free memory was 135.5MB in the beginning and 104.0MB in the end (delta: 31.5MB). Peak memory consumption was 31.5MB. Max. memory is 8.0GB. [2022-12-12 23:25:24,376 INFO L158 Benchmark]: TraceAbstraction took 818937.30ms. Allocated memory was 177.2MB in the beginning and 2.9GB in the end (delta: 2.7GB). Free memory was 103.0MB in the beginning and 444.4MB in the end (delta: -341.4MB). Peak memory consumption was 2.5GB. Max. memory is 8.0GB. [2022-12-12 23:25:24,377 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 177.2MB. Free memory was 153.0MB in the beginning and 152.9MB in the end (delta: 90.7kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 297.36ms. Allocated memory is still 177.2MB. Free memory was 152.3MB in the beginning and 139.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 57.00ms. Allocated memory is still 177.2MB. Free memory was 139.7MB in the beginning and 137.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 47.85ms. Allocated memory is still 177.2MB. Free memory was 137.6MB in the beginning and 136.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 597.11ms. Allocated memory is still 177.2MB. Free memory was 135.5MB in the beginning and 104.0MB in the end (delta: 31.5MB). Peak memory consumption was 31.5MB. Max. memory is 8.0GB. * TraceAbstraction took 818937.30ms. Allocated memory was 177.2MB in the beginning and 2.9GB in the end (delta: 2.7GB). Free memory was 103.0MB in the beginning and 444.4MB in the end (delta: -341.4MB). Peak memory consumption was 2.5GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.9s, 126 PlacesBefore, 30 PlacesAfterwards, 128 TransitionsBefore, 24 TransitionsAfterwards, 1320 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 66 TrivialYvCompositions, 30 ConcurrentYvCompositions, 8 ChoiceCompositions, 104 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 680, independent: 673, independent conditional: 673, independent unconditional: 0, dependent: 7, dependent conditional: 7, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 680, independent: 673, independent conditional: 0, independent unconditional: 673, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 680, independent: 673, independent conditional: 0, independent unconditional: 673, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 680, independent: 673, independent conditional: 0, independent unconditional: 673, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 680, independent: 673, independent conditional: 0, independent unconditional: 673, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 680, independent: 673, independent conditional: 0, independent unconditional: 673, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 7, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 39, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 39, dependent conditional: 0, dependent unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 680, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 680, unknown conditional: 0, unknown unconditional: 680] , Statistics on independence cache: Total cache size (in pairs): 1064, Positive cache size: 1057, Positive conditional cache size: 0, Positive unconditional cache size: 1057, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (18states, 1/24 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 322912 conditions, 7243 events (4921/7242 cut-off events. For 137903/137903 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 40442 event pairs, 2 based on Foata normal form. 0/5651 useless extension candidates. Maximal degree in co-relation 305935. Up to 6997 conditions per place.). - TimeoutResultAtElement [Line: 89]: 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 (18states, 1/24 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 322912 conditions, 7243 events (4921/7242 cut-off events. For 137903/137903 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 40442 event pairs, 2 based on Foata normal form. 0/5651 useless extension candidates. Maximal degree in co-relation 305935. Up to 6997 conditions per place.). - TimeoutResultAtElement [Line: 87]: 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 (18states, 1/24 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 322912 conditions, 7243 events (4921/7242 cut-off events. For 137903/137903 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 40442 event pairs, 2 based on Foata normal form. 0/5651 useless extension candidates. Maximal degree in co-relation 305935. Up to 6997 conditions per place.). - TimeoutResultAtElement [Line: 88]: 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 (18states, 1/24 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 322912 conditions, 7243 events (4921/7242 cut-off events. For 137903/137903 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 40442 event pairs, 2 based on Foata normal form. 0/5651 useless extension candidates. Maximal degree in co-relation 305935. Up to 6997 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 160 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 7.2s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 818.8s, OverallIterations: 45, TraceHistogramMax: 2, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 756.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.1s, HoareTripleCheckerStatistics: 89 mSolverCounterUnknown, 6166 SdHoareTripleChecker+Valid, 12.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6166 mSDsluCounter, 1108 SdHoareTripleChecker+Invalid, 10.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 641 IncrementalHoareTripleChecker+Unchecked, 935 mSDsCounter, 427 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 21254 IncrementalHoareTripleChecker+Invalid, 22411 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 427 mSolverCounterUnsat, 173 mSDtfsCounter, 21254 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2470 GetRequests, 1353 SyntacticMatches, 103 SemanticMatches, 1014 ConstructedPredicates, 10 IntricatePredicates, 1 DeprecatedPredicates, 7108 ImplicationChecksByTransitivity, 19.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=625902occurred in iteration=39, InterpolantAutomatonStates: 538, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 7.2s AutomataMinimizationTime, 44 MinimizatonAttempts, 299861 StatesRemovedByMinimization, 44 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 35.2s InterpolantComputationTime, 1987 NumberOfCodeBlocks, 1987 NumberOfCodeBlocksAsserted, 120 NumberOfCheckSat, 2812 ConstructedInterpolants, 44 QuantifiedInterpolants, 28579 SizeOfPredicates, 590 NumberOfNonLiveVariables, 10473 ConjunctsInSsa, 1286 ConjunctsInUnsatCore, 127 InterpolantComputations, 10 PerfectInterpolantSequences, 192/429 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