/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 21:19:23,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 21:19:23,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 21:19:23,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 21:19:23,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 21:19:23,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 21:19:23,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 21:19:23,924 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 21:19:23,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 21:19:23,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 21:19:23,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 21:19:23,932 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 21:19:23,932 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 21:19:23,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 21:19:23,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 21:19:23,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 21:19:23,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 21:19:23,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 21:19:23,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 21:19:23,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 21:19:23,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 21:19:23,947 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 21:19:23,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 21:19:23,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 21:19:23,950 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 21:19:23,950 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 21:19:23,950 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 21:19:23,950 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 21:19:23,951 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 21:19:23,951 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 21:19:23,951 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 21:19:23,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 21:19:23,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 21:19:23,953 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 21:19:23,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 21:19:23,957 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 21:19:23,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 21:19:23,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 21:19:23,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 21:19:23,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 21:19:23,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 21:19:23,959 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 [2022-12-05 21:19:23,985 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 21:19:23,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 21:19:23,986 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 21:19:23,986 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 21:19:23,987 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 21:19:23,987 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 21:19:23,987 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 21:19:23,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 21:19:23,988 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 21:19:23,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 21:19:23,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 21:19:23,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 21:19:23,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 21:19:23,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 21:19:23,989 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 21:19:23,989 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 21:19:23,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 21:19:23,989 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 21:19:23,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 21:19:23,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 21:19:23,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 21:19:23,989 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 21:19:23,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 21:19:23,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:19:23,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 21:19:23,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 21:19:23,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 21:19:23,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 21:19:23,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 21:19:23,990 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 21:19:23,990 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 21:19:24,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 21:19:24,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 21:19:24,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 21:19:24,273 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 21:19:24,273 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 21:19:24,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c [2022-12-05 21:19:25,203 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 21:19:25,398 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 21:19:25,398 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c [2022-12-05 21:19:25,411 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd4ae2f62/70f34b6882304d58874a1e9b3a7eabeb/FLAGc3152e2ad [2022-12-05 21:19:25,427 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd4ae2f62/70f34b6882304d58874a1e9b3a7eabeb [2022-12-05 21:19:25,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 21:19:25,430 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 21:19:25,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 21:19:25,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 21:19:25,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 21:19:25,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:19:25" (1/1) ... [2022-12-05 21:19:25,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fab7ef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:19:25, skipping insertion in model container [2022-12-05 21:19:25,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:19:25" (1/1) ... [2022-12-05 21:19:25,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 21:19:25,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 21:19:25,579 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:19:25,580 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:19:25,580 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:19:25,581 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:19:25,583 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:19:25,584 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:19:25,584 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:19:25,584 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:19:25,585 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:19:25,586 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:19:25,586 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:19:25,586 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:19:25,592 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/parallel-misc-3-extended.wvr.c[2856,2869] [2022-12-05 21:19:25,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:19:25,600 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 21:19:25,609 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:19:25,609 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:19:25,609 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:19:25,609 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:19:25,610 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:19:25,611 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:19:25,611 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:19:25,611 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:19:25,612 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:19:25,612 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:19:25,613 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:19:25,613 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:19:25,617 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/parallel-misc-3-extended.wvr.c[2856,2869] [2022-12-05 21:19:25,617 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:19:25,626 INFO L208 MainTranslator]: Completed translation [2022-12-05 21:19:25,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:19:25 WrapperNode [2022-12-05 21:19:25,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 21:19:25,627 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 21:19:25,627 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 21:19:25,627 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 21:19:25,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:19:25" (1/1) ... [2022-12-05 21:19:25,636 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:19:25" (1/1) ... [2022-12-05 21:19:25,646 INFO L138 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-12-05 21:19:25,647 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 21:19:25,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 21:19:25,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 21:19:25,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 21:19:25,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:19:25" (1/1) ... [2022-12-05 21:19:25,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:19:25" (1/1) ... [2022-12-05 21:19:25,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:19:25" (1/1) ... [2022-12-05 21:19:25,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:19:25" (1/1) ... [2022-12-05 21:19:25,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:19:25" (1/1) ... [2022-12-05 21:19:25,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:19:25" (1/1) ... [2022-12-05 21:19:25,661 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:19:25" (1/1) ... [2022-12-05 21:19:25,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:19:25" (1/1) ... [2022-12-05 21:19:25,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 21:19:25,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 21:19:25,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 21:19:25,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 21:19:25,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:19:25" (1/1) ... [2022-12-05 21:19:25,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:19:25,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:19:25,716 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) [2022-12-05 21:19:25,732 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 [2022-12-05 21:19:25,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 21:19:25,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 21:19:25,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 21:19:25,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 21:19:25,755 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 21:19:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-05 21:19:25,755 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-05 21:19:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 21:19:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 21:19:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 21:19:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 21:19:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 21:19:25,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 21:19:25,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 21:19:25,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 21:19:25,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 21:19:25,757 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 21:19:25,838 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 21:19:25,839 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 21:19:26,069 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 21:19:26,083 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 21:19:26,084 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-05 21:19:26,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:19:26 BoogieIcfgContainer [2022-12-05 21:19:26,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 21:19:26,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 21:19:26,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 21:19:26,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 21:19:26,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:19:25" (1/3) ... [2022-12-05 21:19:26,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f07442c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:19:26, skipping insertion in model container [2022-12-05 21:19:26,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:19:25" (2/3) ... [2022-12-05 21:19:26,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f07442c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:19:26, skipping insertion in model container [2022-12-05 21:19:26,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:19:26" (3/3) ... [2022-12-05 21:19:26,090 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3-extended.wvr.c [2022-12-05 21:19:26,101 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 21:19:26,101 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 21:19:26,101 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 21:19:26,155 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-05 21:19:26,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 124 transitions, 272 flow [2022-12-05 21:19:26,232 INFO L130 PetriNetUnfolder]: 16/121 cut-off events. [2022-12-05 21:19:26,232 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-05 21:19:26,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 121 events. 16/121 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 128 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2022-12-05 21:19:26,237 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 124 transitions, 272 flow [2022-12-05 21:19:26,240 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 111 transitions, 240 flow [2022-12-05 21:19:26,242 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 21:19:26,253 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 111 transitions, 240 flow [2022-12-05 21:19:26,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 111 transitions, 240 flow [2022-12-05 21:19:26,279 INFO L130 PetriNetUnfolder]: 16/111 cut-off events. [2022-12-05 21:19:26,280 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-05 21:19:26,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 111 events. 16/111 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 126 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2022-12-05 21:19:26,283 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 111 transitions, 240 flow [2022-12-05 21:19:26,283 INFO L188 LiptonReduction]: Number of co-enabled transitions 2958 [2022-12-05 21:19:29,747 INFO L203 LiptonReduction]: Total number of compositions: 89 [2022-12-05 21:19:29,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 21:19:29,762 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;@5650c277, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 21:19:29,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-05 21:19:29,766 INFO L130 PetriNetUnfolder]: 3/18 cut-off events. [2022-12-05 21:19:29,766 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-05 21:19:29,766 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:19:29,767 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:19:29,767 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)] === [2022-12-05 21:19:29,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:19:29,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1291747388, now seen corresponding path program 1 times [2022-12-05 21:19:29,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:19:29,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311310450] [2022-12-05 21:19:29,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:19:29,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:19:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:19:30,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:19:30,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:19:30,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311310450] [2022-12-05 21:19:30,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311310450] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:19:30,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:19:30,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 21:19:30,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999621901] [2022-12-05 21:19:30,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:19:30,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 21:19:30,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:19:30,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 21:19:30,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 21:19:30,043 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 21:19:30,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 19 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:30,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:19:30,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 21:19:30,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:19:30,111 INFO L130 PetriNetUnfolder]: 111/168 cut-off events. [2022-12-05 21:19:30,112 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-12-05 21:19:30,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 168 events. 111/168 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 336 event pairs, 17 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 244. Up to 105 conditions per place. [2022-12-05 21:19:30,114 INFO L137 encePairwiseOnDemand]: 16/19 looper letters, 27 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2022-12-05 21:19:30,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 29 transitions, 140 flow [2022-12-05 21:19:30,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 21:19:30,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 21:19:30,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 30 transitions. [2022-12-05 21:19:30,123 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2022-12-05 21:19:30,124 INFO L175 Difference]: Start difference. First operand has 26 places, 19 transitions, 56 flow. Second operand 3 states and 30 transitions. [2022-12-05 21:19:30,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 29 transitions, 140 flow [2022-12-05 21:19:30,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 29 transitions, 124 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-05 21:19:30,128 INFO L231 Difference]: Finished difference. Result has 23 places, 20 transitions, 56 flow [2022-12-05 21:19:30,129 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=20} [2022-12-05 21:19:30,132 INFO L294 CegarLoopForPetriNet]: 26 programPoint places, -3 predicate places. [2022-12-05 21:19:30,132 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 20 transitions, 56 flow [2022-12-05 21:19:30,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:30,133 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:19:30,133 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:19:30,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 21:19:30,138 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)] === [2022-12-05 21:19:30,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:19:30,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1393409920, now seen corresponding path program 1 times [2022-12-05 21:19:30,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:19:30,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624724474] [2022-12-05 21:19:30,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:19:30,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:19:30,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:19:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:19:30,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:19:30,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624724474] [2022-12-05 21:19:30,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624724474] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:19:30,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:19:30,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 21:19:30,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936672415] [2022-12-05 21:19:30,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:19:30,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 21:19:30,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:19:30,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 21:19:30,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 21:19:30,264 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 21:19:30,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:30,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:19:30,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 21:19:30,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:19:30,323 INFO L130 PetriNetUnfolder]: 151/226 cut-off events. [2022-12-05 21:19:30,323 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-12-05 21:19:30,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 226 events. 151/226 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 542 event pairs, 11 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 188. Up to 185 conditions per place. [2022-12-05 21:19:30,328 INFO L137 encePairwiseOnDemand]: 16/19 looper letters, 29 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2022-12-05 21:19:30,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 31 transitions, 149 flow [2022-12-05 21:19:30,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 21:19:30,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 21:19:30,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 30 transitions. [2022-12-05 21:19:30,330 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2022-12-05 21:19:30,330 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 56 flow. Second operand 3 states and 30 transitions. [2022-12-05 21:19:30,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 31 transitions, 149 flow [2022-12-05 21:19:30,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 31 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 21:19:30,331 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 66 flow [2022-12-05 21:19:30,331 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2022-12-05 21:19:30,332 INFO L294 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2022-12-05 21:19:30,332 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 66 flow [2022-12-05 21:19:30,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:30,332 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:19:30,332 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:19:30,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 21:19:30,332 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)] === [2022-12-05 21:19:30,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:19:30,334 INFO L85 PathProgramCache]: Analyzing trace with hash -506728048, now seen corresponding path program 1 times [2022-12-05 21:19:30,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:19:30,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701695421] [2022-12-05 21:19:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:19:30,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:19:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:19:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:19:30,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:19:30,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701695421] [2022-12-05 21:19:30,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701695421] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:19:30,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:19:30,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 21:19:30,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348565955] [2022-12-05 21:19:30,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:19:30,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 21:19:30,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:19:30,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 21:19:30,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 21:19:30,423 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 21:19:30,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:30,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:19:30,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 21:19:30,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:19:30,476 INFO L130 PetriNetUnfolder]: 220/325 cut-off events. [2022-12-05 21:19:30,476 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2022-12-05 21:19:30,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 852 conditions, 325 events. 220/325 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 877 event pairs, 28 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 586. Up to 243 conditions per place. [2022-12-05 21:19:30,478 INFO L137 encePairwiseOnDemand]: 16/19 looper letters, 31 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2022-12-05 21:19:30,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 33 transitions, 171 flow [2022-12-05 21:19:30,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 21:19:30,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 21:19:30,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 30 transitions. [2022-12-05 21:19:30,480 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2022-12-05 21:19:30,480 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 66 flow. Second operand 3 states and 30 transitions. [2022-12-05 21:19:30,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 33 transitions, 171 flow [2022-12-05 21:19:30,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 33 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 21:19:30,481 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 76 flow [2022-12-05 21:19:30,482 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2022-12-05 21:19:30,483 INFO L294 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2022-12-05 21:19:30,483 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 76 flow [2022-12-05 21:19:30,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:30,483 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:19:30,483 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:19:30,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-05 21:19:30,483 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)] === [2022-12-05 21:19:30,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:19:30,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1812541563, now seen corresponding path program 1 times [2022-12-05 21:19:30,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:19:30,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111788642] [2022-12-05 21:19:30,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:19:30,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:19:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:19:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:19:30,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:19:30,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111788642] [2022-12-05 21:19:30,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111788642] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:19:30,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606508779] [2022-12-05 21:19:30,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:19:30,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:19:30,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:19:30,687 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) [2022-12-05 21:19:30,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-05 21:19:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:19:30,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-05 21:19:30,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:19:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:19:30,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:19:30,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:19:30,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606508779] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:19:30,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:19:30,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 8 [2022-12-05 21:19:30,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151848886] [2022-12-05 21:19:30,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:19:30,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-05 21:19:30,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:19:30,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-05 21:19:30,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-12-05 21:19:30,977 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 21:19:30,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 76 flow. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:30,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:19:30,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 21:19:30,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:19:31,120 INFO L130 PetriNetUnfolder]: 319/470 cut-off events. [2022-12-05 21:19:31,120 INFO L131 PetriNetUnfolder]: For 188/188 co-relation queries the response was YES. [2022-12-05 21:19:31,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1355 conditions, 470 events. 319/470 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1386 event pairs, 12 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 500. Up to 145 conditions per place. [2022-12-05 21:19:31,122 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 67 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2022-12-05 21:19:31,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 78 transitions, 418 flow [2022-12-05 21:19:31,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 21:19:31,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 21:19:31,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 70 transitions. [2022-12-05 21:19:31,124 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4605263157894737 [2022-12-05 21:19:31,124 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 76 flow. Second operand 8 states and 70 transitions. [2022-12-05 21:19:31,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 78 transitions, 418 flow [2022-12-05 21:19:31,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 78 transitions, 415 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 21:19:31,125 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 149 flow [2022-12-05 21:19:31,125 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=149, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2022-12-05 21:19:31,126 INFO L294 CegarLoopForPetriNet]: 26 programPoint places, 10 predicate places. [2022-12-05 21:19:31,126 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 149 flow [2022-12-05 21:19:31,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:31,126 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:19:31,126 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:19:31,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-05 21:19:31,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:19:31,331 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)] === [2022-12-05 21:19:31,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:19:31,332 INFO L85 PathProgramCache]: Analyzing trace with hash 2102831478, now seen corresponding path program 2 times [2022-12-05 21:19:31,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:19:31,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976380739] [2022-12-05 21:19:31,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:19:31,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:19:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:19:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-05 21:19:31,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:19:31,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976380739] [2022-12-05 21:19:31,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976380739] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:19:31,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243762149] [2022-12-05 21:19:31,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:19:31,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:19:31,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:19:31,558 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) [2022-12-05 21:19:31,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-05 21:19:31,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:19:31,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:19:31,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-05 21:19:31,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:19:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:19:31,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:19:31,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:19:31,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243762149] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:19:31,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:19:31,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-12-05 21:19:31,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209739870] [2022-12-05 21:19:31,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:19:31,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-05 21:19:31,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:19:31,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-05 21:19:31,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-05 21:19:31,833 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 21:19:31,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 149 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:31,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:19:31,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 21:19:31,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:19:32,061 INFO L130 PetriNetUnfolder]: 503/734 cut-off events. [2022-12-05 21:19:32,061 INFO L131 PetriNetUnfolder]: For 880/880 co-relation queries the response was YES. [2022-12-05 21:19:32,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2548 conditions, 734 events. 503/734 cut-off events. For 880/880 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2362 event pairs, 9 based on Foata normal form. 42/682 useless extension candidates. Maximal degree in co-relation 884. Up to 223 conditions per place. [2022-12-05 21:19:32,065 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 111 selfloop transitions, 27 changer transitions 0/138 dead transitions. [2022-12-05 21:19:32,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 138 transitions, 982 flow [2022-12-05 21:19:32,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-05 21:19:32,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-05 21:19:32,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 103 transitions. [2022-12-05 21:19:32,066 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.41700404858299595 [2022-12-05 21:19:32,066 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 149 flow. Second operand 13 states and 103 transitions. [2022-12-05 21:19:32,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 138 transitions, 982 flow [2022-12-05 21:19:32,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 138 transitions, 812 flow, removed 72 selfloop flow, removed 2 redundant places. [2022-12-05 21:19:32,071 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 337 flow [2022-12-05 21:19:32,071 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=337, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2022-12-05 21:19:32,071 INFO L294 CegarLoopForPetriNet]: 26 programPoint places, 26 predicate places. [2022-12-05 21:19:32,071 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 337 flow [2022-12-05 21:19:32,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:32,072 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:19:32,072 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:19:32,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-05 21:19:32,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:19:32,291 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)] === [2022-12-05 21:19:32,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:19:32,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1972789968, now seen corresponding path program 3 times [2022-12-05 21:19:32,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:19:32,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157230027] [2022-12-05 21:19:32,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:19:32,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:19:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:19:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:19:32,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:19:32,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157230027] [2022-12-05 21:19:32,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157230027] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:19:32,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870558621] [2022-12-05 21:19:32,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:19:32,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:19:32,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:19:32,993 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) [2022-12-05 21:19:33,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-05 21:19:33,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:19:33,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:19:33,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-05 21:19:33,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:19:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:19:33,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:19:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:19:33,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870558621] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:19:33,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:19:33,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2022-12-05 21:19:33,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519633341] [2022-12-05 21:19:33,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:19:33,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-05 21:19:33,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:19:33,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-05 21:19:33,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-12-05 21:19:33,979 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 21:19:33,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 337 flow. Second operand has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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) [2022-12-05 21:19:33,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:19:33,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 21:19:33,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:19:35,325 INFO L130 PetriNetUnfolder]: 1952/2821 cut-off events. [2022-12-05 21:19:35,325 INFO L131 PetriNetUnfolder]: For 7142/7142 co-relation queries the response was YES. [2022-12-05 21:19:35,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12134 conditions, 2821 events. 1952/2821 cut-off events. For 7142/7142 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12063 event pairs, 20 based on Foata normal form. 2/2421 useless extension candidates. Maximal degree in co-relation 8206. Up to 877 conditions per place. [2022-12-05 21:19:35,344 INFO L137 encePairwiseOnDemand]: 11/19 looper letters, 200 selfloop transitions, 234 changer transitions 6/440 dead transitions. [2022-12-05 21:19:35,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 440 transitions, 3437 flow [2022-12-05 21:19:35,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-05 21:19:35,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-05 21:19:35,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 294 transitions. [2022-12-05 21:19:35,346 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5157894736842106 [2022-12-05 21:19:35,346 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 337 flow. Second operand 30 states and 294 transitions. [2022-12-05 21:19:35,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 440 transitions, 3437 flow [2022-12-05 21:19:35,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 440 transitions, 3207 flow, removed 92 selfloop flow, removed 2 redundant places. [2022-12-05 21:19:35,379 INFO L231 Difference]: Finished difference. Result has 85 places, 272 transitions, 2477 flow [2022-12-05 21:19:35,379 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2477, PETRI_PLACES=85, PETRI_TRANSITIONS=272} [2022-12-05 21:19:35,379 INFO L294 CegarLoopForPetriNet]: 26 programPoint places, 59 predicate places. [2022-12-05 21:19:35,380 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 272 transitions, 2477 flow [2022-12-05 21:19:35,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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) [2022-12-05 21:19:35,380 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:19:35,380 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:19:35,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-05 21:19:35,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:19:35,601 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)] === [2022-12-05 21:19:35,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:19:35,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1852131044, now seen corresponding path program 4 times [2022-12-05 21:19:35,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:19:35,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004137062] [2022-12-05 21:19:35,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:19:35,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:19:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:19:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:19:36,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:19:36,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004137062] [2022-12-05 21:19:36,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004137062] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:19:36,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605478276] [2022-12-05 21:19:36,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:19:36,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:19:36,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:19:36,212 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) [2022-12-05 21:19:36,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-05 21:19:36,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:19:36,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:19:36,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-05 21:19:36,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:19:36,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:19:36,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:19:37,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:19:37,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605478276] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:19:37,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:19:37,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2022-12-05 21:19:37,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642130052] [2022-12-05 21:19:37,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:19:37,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-05 21:19:37,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:19:37,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-05 21:19:37,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-12-05 21:19:37,124 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 21:19:37,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 272 transitions, 2477 flow. Second operand has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 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) [2022-12-05 21:19:37,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:19:37,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 21:19:37,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:19:40,329 INFO L130 PetriNetUnfolder]: 7301/10521 cut-off events. [2022-12-05 21:19:40,329 INFO L131 PetriNetUnfolder]: For 49579/49579 co-relation queries the response was YES. [2022-12-05 21:19:40,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56036 conditions, 10521 events. 7301/10521 cut-off events. For 49579/49579 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 55687 event pairs, 84 based on Foata normal form. 79/9848 useless extension candidates. Maximal degree in co-relation 54099. Up to 3029 conditions per place. [2022-12-05 21:19:40,394 INFO L137 encePairwiseOnDemand]: 11/19 looper letters, 459 selfloop transitions, 988 changer transitions 47/1494 dead transitions. [2022-12-05 21:19:40,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 1494 transitions, 16100 flow [2022-12-05 21:19:40,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-05 21:19:40,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-12-05 21:19:40,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 483 transitions. [2022-12-05 21:19:40,396 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5649122807017544 [2022-12-05 21:19:40,396 INFO L175 Difference]: Start difference. First operand has 85 places, 272 transitions, 2477 flow. Second operand 45 states and 483 transitions. [2022-12-05 21:19:40,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 1494 transitions, 16100 flow [2022-12-05 21:19:40,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 1494 transitions, 13738 flow, removed 1181 selfloop flow, removed 0 redundant places. [2022-12-05 21:19:40,799 INFO L231 Difference]: Finished difference. Result has 157 places, 1143 transitions, 12827 flow [2022-12-05 21:19:40,799 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=12827, PETRI_PLACES=157, PETRI_TRANSITIONS=1143} [2022-12-05 21:19:40,800 INFO L294 CegarLoopForPetriNet]: 26 programPoint places, 131 predicate places. [2022-12-05 21:19:40,800 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 1143 transitions, 12827 flow [2022-12-05 21:19:40,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 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) [2022-12-05 21:19:40,800 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:19:40,800 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:19:40,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-05 21:19:41,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:19:41,006 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)] === [2022-12-05 21:19:41,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:19:41,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1455395968, now seen corresponding path program 5 times [2022-12-05 21:19:41,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:19:41,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948671814] [2022-12-05 21:19:41,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:19:41,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:19:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:19:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:19:41,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:19:41,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948671814] [2022-12-05 21:19:41,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948671814] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:19:41,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817045240] [2022-12-05 21:19:41,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:19:41,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:19:41,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:19:41,697 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) [2022-12-05 21:19:41,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-05 21:19:41,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:19:41,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:19:41,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-05 21:19:41,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:19:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:19:41,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:19:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:19:42,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817045240] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:19:42,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:19:42,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2022-12-05 21:19:42,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857465136] [2022-12-05 21:19:42,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:19:42,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-05 21:19:42,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:19:42,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-05 21:19:42,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-12-05 21:19:42,588 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 21:19:42,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 1143 transitions, 12827 flow. Second operand has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 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) [2022-12-05 21:19:42,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:19:42,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 21:19:42,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:19:47,805 INFO L130 PetriNetUnfolder]: 12696/18582 cut-off events. [2022-12-05 21:19:47,805 INFO L131 PetriNetUnfolder]: For 195633/195633 co-relation queries the response was YES. [2022-12-05 21:19:47,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118834 conditions, 18582 events. 12696/18582 cut-off events. For 195633/195633 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 111784 event pairs, 188 based on Foata normal form. 277/18779 useless extension candidates. Maximal degree in co-relation 117419. Up to 6490 conditions per place. [2022-12-05 21:19:47,997 INFO L137 encePairwiseOnDemand]: 12/19 looper letters, 814 selfloop transitions, 1658 changer transitions 25/2497 dead transitions. [2022-12-05 21:19:47,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 2497 transitions, 32141 flow [2022-12-05 21:19:47,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-05 21:19:47,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-05 21:19:48,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 438 transitions. [2022-12-05 21:19:48,001 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5239234449760766 [2022-12-05 21:19:48,001 INFO L175 Difference]: Start difference. First operand has 157 places, 1143 transitions, 12827 flow. Second operand 44 states and 438 transitions. [2022-12-05 21:19:48,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 2497 transitions, 32141 flow [2022-12-05 21:19:50,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 2497 transitions, 30939 flow, removed 591 selfloop flow, removed 2 redundant places. [2022-12-05 21:19:50,271 INFO L231 Difference]: Finished difference. Result has 217 places, 2141 transitions, 30052 flow [2022-12-05 21:19:50,272 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=12094, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=799, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=30052, PETRI_PLACES=217, PETRI_TRANSITIONS=2141} [2022-12-05 21:19:50,272 INFO L294 CegarLoopForPetriNet]: 26 programPoint places, 191 predicate places. [2022-12-05 21:19:50,272 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 2141 transitions, 30052 flow [2022-12-05 21:19:50,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 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) [2022-12-05 21:19:50,273 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:19:50,273 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:19:50,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-05 21:19:50,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:19:50,478 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)] === [2022-12-05 21:19:50,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:19:50,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1151699008, now seen corresponding path program 6 times [2022-12-05 21:19:50,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:19:50,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899253279] [2022-12-05 21:19:50,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:19:50,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:19:50,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:19:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:19:51,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:19:51,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899253279] [2022-12-05 21:19:51,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899253279] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:19:51,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039395652] [2022-12-05 21:19:51,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:19:51,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:19:51,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:19:51,146 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) [2022-12-05 21:19:51,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-05 21:19:51,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-05 21:19:51,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:19:51,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-05 21:19:51,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:19:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:19:51,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:19:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:19:52,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039395652] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:19:52,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:19:52,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2022-12-05 21:19:52,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655191847] [2022-12-05 21:19:52,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:19:52,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-05 21:19:52,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:19:52,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-05 21:19:52,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-12-05 21:19:52,053 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 21:19:52,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 2141 transitions, 30052 flow. Second operand has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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) [2022-12-05 21:19:52,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:19:52,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 21:19:52,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:20:03,083 INFO L130 PetriNetUnfolder]: 20133/29005 cut-off events. [2022-12-05 21:20:03,084 INFO L131 PetriNetUnfolder]: For 401178/401178 co-relation queries the response was YES. [2022-12-05 21:20:03,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217089 conditions, 29005 events. 20133/29005 cut-off events. For 401178/401178 co-relation queries the response was YES. Maximal size of possible extension queue 1303. Compared 181258 event pairs, 216 based on Foata normal form. 271/29272 useless extension candidates. Maximal degree in co-relation 215650. Up to 9411 conditions per place. [2022-12-05 21:20:03,323 INFO L137 encePairwiseOnDemand]: 11/19 looper letters, 1044 selfloop transitions, 2962 changer transitions 54/4060 dead transitions. [2022-12-05 21:20:03,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 4060 transitions, 64450 flow [2022-12-05 21:20:03,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-05 21:20:03,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-12-05 21:20:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 614 transitions. [2022-12-05 21:20:03,326 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5212224108658744 [2022-12-05 21:20:03,326 INFO L175 Difference]: Start difference. First operand has 217 places, 2141 transitions, 30052 flow. Second operand 62 states and 614 transitions. [2022-12-05 21:20:03,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 4060 transitions, 64450 flow [2022-12-05 21:20:13,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 4060 transitions, 61679 flow, removed 1368 selfloop flow, removed 5 redundant places. [2022-12-05 21:20:13,257 INFO L231 Difference]: Finished difference. Result has 312 places, 3560 transitions, 59875 flow [2022-12-05 21:20:13,258 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=28140, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1633, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=59875, PETRI_PLACES=312, PETRI_TRANSITIONS=3560} [2022-12-05 21:20:13,259 INFO L294 CegarLoopForPetriNet]: 26 programPoint places, 286 predicate places. [2022-12-05 21:20:13,259 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 3560 transitions, 59875 flow [2022-12-05 21:20:13,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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) [2022-12-05 21:20:13,259 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:20:13,259 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:20:13,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-05 21:20:13,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:20:13,463 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)] === [2022-12-05 21:20:13,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:20:13,464 INFO L85 PathProgramCache]: Analyzing trace with hash -100358773, now seen corresponding path program 7 times [2022-12-05 21:20:13,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:20:13,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883432974] [2022-12-05 21:20:13,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:20:13,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:20:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:20:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-05 21:20:13,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:20:13,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883432974] [2022-12-05 21:20:13,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883432974] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:20:13,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263991] [2022-12-05 21:20:13,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:20:13,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:20:13,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:20:13,793 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) [2022-12-05 21:20:13,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-05 21:20:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:20:13,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-05 21:20:13,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:20:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-05 21:20:13,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:20:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-05 21:20:14,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263991] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:20:14,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:20:14,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-12-05 21:20:14,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588761640] [2022-12-05 21:20:14,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:20:14,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-05 21:20:14,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:20:14,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-05 21:20:14,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-12-05 21:20:14,070 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 21:20:14,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 3560 transitions, 59875 flow. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 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) [2022-12-05 21:20:14,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:20:14,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 21:20:14,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:20:25,882 INFO L130 PetriNetUnfolder]: 17654/25257 cut-off events. [2022-12-05 21:20:25,882 INFO L131 PetriNetUnfolder]: For 746517/746517 co-relation queries the response was YES. [2022-12-05 21:20:26,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222330 conditions, 25257 events. 17654/25257 cut-off events. For 746517/746517 co-relation queries the response was YES. Maximal size of possible extension queue 1155. Compared 151751 event pairs, 1438 based on Foata normal form. 1542/26799 useless extension candidates. Maximal degree in co-relation 222224. Up to 16242 conditions per place. [2022-12-05 21:20:26,133 INFO L137 encePairwiseOnDemand]: 14/19 looper letters, 2349 selfloop transitions, 1038 changer transitions 49/3436 dead transitions. [2022-12-05 21:20:26,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 3436 transitions, 64126 flow [2022-12-05 21:20:26,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 21:20:26,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 21:20:26,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 54 transitions. [2022-12-05 21:20:26,134 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.40601503759398494 [2022-12-05 21:20:26,134 INFO L175 Difference]: Start difference. First operand has 312 places, 3560 transitions, 59875 flow. Second operand 7 states and 54 transitions. [2022-12-05 21:20:26,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 3436 transitions, 64126 flow [2022-12-05 21:20:39,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 3436 transitions, 61048 flow, removed 1089 selfloop flow, removed 16 redundant places. [2022-12-05 21:20:39,424 INFO L231 Difference]: Finished difference. Result has 300 places, 3140 transitions, 53302 flow [2022-12-05 21:20:39,426 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=48393, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3049, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=907, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2088, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=53302, PETRI_PLACES=300, PETRI_TRANSITIONS=3140} [2022-12-05 21:20:39,427 INFO L294 CegarLoopForPetriNet]: 26 programPoint places, 274 predicate places. [2022-12-05 21:20:39,427 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 3140 transitions, 53302 flow [2022-12-05 21:20:39,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 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) [2022-12-05 21:20:39,427 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:20:39,427 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:20:39,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-05 21:20:39,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:20:39,632 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)] === [2022-12-05 21:20:39,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:20:39,633 INFO L85 PathProgramCache]: Analyzing trace with hash 595413060, now seen corresponding path program 8 times [2022-12-05 21:20:39,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:20:39,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409762548] [2022-12-05 21:20:39,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:20:39,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:20:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:20:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:20:40,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:20:40,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409762548] [2022-12-05 21:20:40,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409762548] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:20:40,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072456902] [2022-12-05 21:20:40,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:20:40,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:20:40,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:20:40,192 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) [2022-12-05 21:20:40,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-05 21:20:40,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:20:40,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:20:40,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-05 21:20:40,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:20:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:20:40,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:20:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:20:41,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072456902] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:20:41,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:20:41,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2022-12-05 21:20:41,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232805220] [2022-12-05 21:20:41,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:20:41,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-05 21:20:41,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:20:41,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-05 21:20:41,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-12-05 21:20:41,109 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 21:20:41,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 3140 transitions, 53302 flow. Second operand has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 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) [2022-12-05 21:20:41,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:20:41,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 21:20:41,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:20:59,423 INFO L130 PetriNetUnfolder]: 27484/38764 cut-off events. [2022-12-05 21:20:59,423 INFO L131 PetriNetUnfolder]: For 905207/905207 co-relation queries the response was YES. [2022-12-05 21:20:59,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354557 conditions, 38764 events. 27484/38764 cut-off events. For 905207/905207 co-relation queries the response was YES. Maximal size of possible extension queue 1651. Compared 238911 event pairs, 648 based on Foata normal form. 32/38796 useless extension candidates. Maximal degree in co-relation 354457. Up to 14231 conditions per place. [2022-12-05 21:21:00,040 INFO L137 encePairwiseOnDemand]: 11/19 looper letters, 1600 selfloop transitions, 4211 changer transitions 40/5851 dead transitions. [2022-12-05 21:21:00,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 5851 transitions, 112281 flow [2022-12-05 21:21:00,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-05 21:21:00,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-12-05 21:21:00,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 411 transitions. [2022-12-05 21:21:00,042 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4414607948442535 [2022-12-05 21:21:00,043 INFO L175 Difference]: Start difference. First operand has 300 places, 3140 transitions, 53302 flow. Second operand 49 states and 411 transitions. [2022-12-05 21:21:00,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 5851 transitions, 112281 flow [2022-12-05 21:21:26,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 5851 transitions, 110366 flow, removed 541 selfloop flow, removed 16 redundant places. [2022-12-05 21:21:26,094 INFO L231 Difference]: Finished difference. Result has 361 places, 5523 transitions, 111210 flow [2022-12-05 21:21:26,096 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=52355, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2053, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=792, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=111210, PETRI_PLACES=361, PETRI_TRANSITIONS=5523} [2022-12-05 21:21:26,097 INFO L294 CegarLoopForPetriNet]: 26 programPoint places, 335 predicate places. [2022-12-05 21:21:26,097 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 5523 transitions, 111210 flow [2022-12-05 21:21:26,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 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) [2022-12-05 21:21:26,097 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:21:26,097 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:21:26,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-05 21:21:26,301 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,SelfDestructingSolverStorable10 [2022-12-05 21:21:26,303 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)] === [2022-12-05 21:21:26,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:21:26,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1234031948, now seen corresponding path program 9 times [2022-12-05 21:21:26,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:21:26,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902176305] [2022-12-05 21:21:26,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:21:26,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:21:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:21:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:21:26,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:21:26,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902176305] [2022-12-05 21:21:26,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902176305] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:21:26,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576278082] [2022-12-05 21:21:26,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:21:26,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:21:26,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:21:26,836 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) [2022-12-05 21:21:26,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-05 21:21:26,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 21:21:26,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:21:26,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-05 21:21:26,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:21:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:21:27,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:21:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:21:27,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576278082] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:21:27,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:21:27,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-12-05 21:21:27,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808292286] [2022-12-05 21:21:27,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:21:27,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-05 21:21:27,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:21:27,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-05 21:21:27,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-12-05 21:21:27,880 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 21:21:27,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 5523 transitions, 111210 flow. Second operand has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 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) [2022-12-05 21:21:27,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:21:27,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 21:21:27,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:22:17,484 INFO L130 PetriNetUnfolder]: 46899/64973 cut-off events. [2022-12-05 21:22:17,484 INFO L131 PetriNetUnfolder]: For 1448868/1448868 co-relation queries the response was YES. [2022-12-05 21:22:18,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660439 conditions, 64973 events. 46899/64973 cut-off events. For 1448868/1448868 co-relation queries the response was YES. Maximal size of possible extension queue 2873. Compared 413812 event pairs, 796 based on Foata normal form. 18/64991 useless extension candidates. Maximal degree in co-relation 660323. Up to 26413 conditions per place. [2022-12-05 21:22:19,196 INFO L137 encePairwiseOnDemand]: 11/19 looper letters, 2918 selfloop transitions, 8194 changer transitions 44/11156 dead transitions. [2022-12-05 21:22:19,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 11156 transitions, 249638 flow [2022-12-05 21:22:19,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-05 21:22:19,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-12-05 21:22:19,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 486 transitions. [2022-12-05 21:22:19,198 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.41932700603968937 [2022-12-05 21:22:19,198 INFO L175 Difference]: Start difference. First operand has 361 places, 5523 transitions, 111210 flow. Second operand 61 states and 486 transitions. [2022-12-05 21:22:19,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 11156 transitions, 249638 flow [2022-12-05 21:23:59,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 11156 transitions, 237906 flow, removed 5856 selfloop flow, removed 3 redundant places. [2022-12-05 21:23:59,984 INFO L231 Difference]: Finished difference. Result has 442 places, 10621 transitions, 238537 flow [2022-12-05 21:23:59,988 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=106764, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3679, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=238537, PETRI_PLACES=442, PETRI_TRANSITIONS=10621} [2022-12-05 21:23:59,990 INFO L294 CegarLoopForPetriNet]: 26 programPoint places, 416 predicate places. [2022-12-05 21:23:59,990 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 10621 transitions, 238537 flow [2022-12-05 21:23:59,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 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) [2022-12-05 21:23:59,995 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:23:59,995 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:24:00,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-05 21:24:00,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:24:00,225 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)] === [2022-12-05 21:24:00,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:24:00,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1555209812, now seen corresponding path program 10 times [2022-12-05 21:24:00,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:24:00,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227166035] [2022-12-05 21:24:00,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:24:00,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:24:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:24:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:24:00,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:24:00,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227166035] [2022-12-05 21:24:00,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227166035] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:24:00,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349056652] [2022-12-05 21:24:00,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:24:00,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:24:00,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:24:00,848 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) [2022-12-05 21:24:00,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-05 21:24:00,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:24:00,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:24:00,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-05 21:24:00,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:24:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:24:01,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:24:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:24:01,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349056652] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:24:01,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:24:01,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2022-12-05 21:24:01,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755448857] [2022-12-05 21:24:01,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:24:01,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-05 21:24:01,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:24:01,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-05 21:24:01,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-12-05 21:24:01,629 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 21:24:01,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 10621 transitions, 238537 flow. Second operand has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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) [2022-12-05 21:24:01,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:24:01,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 21:24:01,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:26:13,318 INFO L130 PetriNetUnfolder]: 57013/78865 cut-off events. [2022-12-05 21:26:13,319 INFO L131 PetriNetUnfolder]: For 2145808/2145808 co-relation queries the response was YES. [2022-12-05 21:26:14,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 871615 conditions, 78865 events. 57013/78865 cut-off events. For 2145808/2145808 co-relation queries the response was YES. Maximal size of possible extension queue 3590. Compared 514631 event pairs, 1510 based on Foata normal form. 44/78909 useless extension candidates. Maximal degree in co-relation 871476. Up to 30569 conditions per place. [2022-12-05 21:26:15,726 INFO L137 encePairwiseOnDemand]: 12/19 looper letters, 3684 selfloop transitions, 10345 changer transitions 44/14073 dead transitions. [2022-12-05 21:26:15,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 14073 transitions, 341749 flow [2022-12-05 21:26:15,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-05 21:26:15,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-05 21:26:15,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 240 transitions. [2022-12-05 21:26:15,729 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.45112781954887216 [2022-12-05 21:26:15,729 INFO L175 Difference]: Start difference. First operand has 442 places, 10621 transitions, 238537 flow. Second operand 28 states and 240 transitions. [2022-12-05 21:26:15,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 14073 transitions, 341749 flow [2022-12-05 21:29:18,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 14073 transitions, 333216 flow, removed 4257 selfloop flow, removed 3 redundant places. [2022-12-05 21:29:19,215 INFO L231 Difference]: Finished difference. Result has 485 places, 13723 transitions, 342712 flow [2022-12-05 21:29:19,222 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=231969, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7581, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=342712, PETRI_PLACES=485, PETRI_TRANSITIONS=13723} [2022-12-05 21:29:19,222 INFO L294 CegarLoopForPetriNet]: 26 programPoint places, 459 predicate places. [2022-12-05 21:29:19,223 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 13723 transitions, 342712 flow [2022-12-05 21:29:19,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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) [2022-12-05 21:29:19,223 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:29:19,223 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:29:19,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-05 21:29:19,427 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,SelfDestructingSolverStorable12 [2022-12-05 21:29:19,427 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)] === [2022-12-05 21:29:19,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:29:19,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1987626780, now seen corresponding path program 11 times [2022-12-05 21:29:19,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:29:19,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119137237] [2022-12-05 21:29:19,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:29:19,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:29:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:29:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:29:19,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:29:19,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119137237] [2022-12-05 21:29:19,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119137237] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:29:19,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946039807] [2022-12-05 21:29:19,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:29:19,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:29:19,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:29:19,840 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) [2022-12-05 21:29:19,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-05 21:29:19,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:29:19,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:29:19,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-05 21:29:19,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:29:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:29:20,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:29:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:29:20,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946039807] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:29:20,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:29:20,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 18 [2022-12-05 21:29:20,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802796863] [2022-12-05 21:29:20,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:29:20,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-05 21:29:20,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:29:20,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-05 21:29:20,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-12-05 21:29:20,828 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 19 [2022-12-05 21:29:20,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 13723 transitions, 342712 flow. Second operand has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 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) [2022-12-05 21:29:20,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:29:20,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 19 [2022-12-05 21:29:20,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-12-05 21:32:01,943 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-05 21:32:01,986 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 [2022-12-05 21:32:02,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-05 21:32:02,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2022-12-05 21:32:03,592 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-12-05 21:32:03,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-05 21:32:03,592 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2022-12-05 21:32:03,593 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-12-05 21:32:03,593 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-12-05 21:32:03,593 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-12-05 21:32:03,593 INFO L458 BasicCegarLoop]: Path program histogram: [11, 1, 1, 1] [2022-12-05 21:32:03,595 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-05 21:32:03,595 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-05 21:32:03,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 09:32:03 BasicIcfg [2022-12-05 21:32:03,597 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-05 21:32:03,597 INFO L158 Benchmark]: Toolchain (without parser) took 758167.46ms. Allocated memory was 230.7MB in the beginning and 4.0GB in the end (delta: 3.8GB). Free memory was 206.0MB in the beginning and 1.9GB in the end (delta: -1.7GB). Peak memory consumption was 4.8GB. Max. memory is 8.0GB. [2022-12-05 21:32:03,597 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 230.7MB. Free memory was 206.9MB in the beginning and 206.8MB in the end (delta: 81.5kB). There was no memory consumed. Max. memory is 8.0GB. [2022-12-05 21:32:03,597 INFO L158 Benchmark]: CACSL2BoogieTranslator took 195.04ms. Allocated memory is still 230.7MB. Free memory was 206.0MB in the beginning and 192.9MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-12-05 21:32:03,598 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.66ms. Allocated memory is still 230.7MB. Free memory was 192.9MB in the beginning and 191.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-05 21:32:03,598 INFO L158 Benchmark]: Boogie Preprocessor took 15.99ms. Allocated memory is still 230.7MB. Free memory was 191.3MB in the beginning and 189.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-05 21:32:03,598 INFO L158 Benchmark]: RCFGBuilder took 421.47ms. Allocated memory is still 230.7MB. Free memory was 189.7MB in the beginning and 174.0MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2022-12-05 21:32:03,598 INFO L158 Benchmark]: TraceAbstraction took 757510.48ms. Allocated memory was 230.7MB in the beginning and 4.0GB in the end (delta: 3.8GB). Free memory was 173.5MB in the beginning and 1.9GB in the end (delta: -1.7GB). Peak memory consumption was 4.8GB. Max. memory is 8.0GB. [2022-12-05 21:32:03,599 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 230.7MB. Free memory was 206.9MB in the beginning and 206.8MB in the end (delta: 81.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 195.04ms. Allocated memory is still 230.7MB. Free memory was 206.0MB in the beginning and 192.9MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.66ms. Allocated memory is still 230.7MB. Free memory was 192.9MB in the beginning and 191.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 15.99ms. Allocated memory is still 230.7MB. Free memory was 191.3MB in the beginning and 189.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 421.47ms. Allocated memory is still 230.7MB. Free memory was 189.7MB in the beginning and 174.0MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 757510.48ms. Allocated memory was 230.7MB in the beginning and 4.0GB in the end (delta: 3.8GB). Free memory was 173.5MB in the beginning and 1.9GB in the end (delta: -1.7GB). Peak memory consumption was 4.8GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.5s, 105 PlacesBefore, 26 PlacesAfterwards, 111 TransitionsBefore, 19 TransitionsAfterwards, 2958 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 34 TrivialYvCompositions, 45 ConcurrentYvCompositions, 10 ChoiceCompositions, 89 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 1823, independent: 1823, independent conditional: 1823, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 1823, independent: 1823, independent conditional: 0, independent unconditional: 1823, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 1823, independent: 1823, independent conditional: 0, independent unconditional: 1823, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 1823, independent: 1823, independent conditional: 0, independent unconditional: 1823, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1482, independent: 1482, independent conditional: 0, independent unconditional: 1482, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1482, independent: 1468, independent conditional: 0, independent unconditional: 1468, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 14, independent: 14, independent conditional: 0, independent unconditional: 14, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 70, independent: 70, independent conditional: 0, independent unconditional: 70, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1823, independent: 341, independent conditional: 0, independent unconditional: 341, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 1482, unknown conditional: 0, unknown unconditional: 1482] , Statistics on independence cache: Total cache size (in pairs): 2721, Positive cache size: 2721, Positive conditional cache size: 0, Positive unconditional cache size: 2721, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 127]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 120]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 121]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 119]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 151 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 757.4s, OverallIterations: 14, TraceHistogramMax: 3, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 737.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2913 SdHoareTripleChecker+Valid, 6.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2913 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 5.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 947 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10253 IncrementalHoareTripleChecker+Invalid, 11200 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 947 mSolverCounterUnsat, 0 mSDtfsCounter, 10253 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 825 GetRequests, 317 SyntacticMatches, 23 SemanticMatches, 485 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8428 ImplicationChecksByTransitivity, 13.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=342712occurred in iteration=13, InterpolantAutomatonStates: 356, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 12.8s InterpolantComputationTime, 527 NumberOfCodeBlocks, 527 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 729 ConstructedInterpolants, 0 QuantifiedInterpolants, 11321 SizeOfPredicates, 103 NumberOfNonLiveVariables, 1873 ConjunctsInSsa, 231 ConjunctsInUnsatCore, 36 InterpolantComputations, 3 PerfectInterpolantSequences, 42/279 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