/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/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 20:14:24,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 20:14:24,356 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 20:14:24,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 20:14:24,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 20:14:24,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 20:14:24,409 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 20:14:24,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 20:14:24,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 20:14:24,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 20:14:24,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 20:14:24,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 20:14:24,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 20:14:24,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 20:14:24,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 20:14:24,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 20:14:24,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 20:14:24,428 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 20:14:24,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 20:14:24,433 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 20:14:24,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 20:14:24,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 20:14:24,436 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 20:14:24,437 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 20:14:24,441 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 20:14:24,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 20:14:24,442 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 20:14:24,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 20:14:24,443 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 20:14:24,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 20:14:24,444 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 20:14:24,445 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 20:14:24,446 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 20:14:24,447 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 20:14:24,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 20:14:24,447 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 20:14:24,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 20:14:24,448 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 20:14:24,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 20:14:24,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 20:14:24,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 20:14:24,450 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 20:14:24,473 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 20:14:24,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 20:14:24,475 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 20:14:24,475 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 20:14:24,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 20:14:24,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 20:14:24,476 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 20:14:24,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 20:14:24,476 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 20:14:24,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 20:14:24,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 20:14:24,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 20:14:24,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 20:14:24,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 20:14:24,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 20:14:24,477 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 20:14:24,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 20:14:24,477 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 20:14:24,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 20:14:24,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 20:14:24,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 20:14:24,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 20:14:24,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 20:14:24,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 20:14:24,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 20:14:24,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 20:14:24,478 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 20:14:24,478 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 20:14:24,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 20:14:24,479 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 20:14:24,479 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 20:14:24,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 20:14:24,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 20:14:24,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 20:14:24,747 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 20:14:24,747 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 20:14:24,748 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2022-12-05 20:14:25,697 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 20:14:25,898 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 20:14:25,898 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2022-12-05 20:14:25,908 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfc7d44eb/21d41003a8624438b2507e79c1b7208d/FLAGb1c72204c [2022-12-05 20:14:25,920 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfc7d44eb/21d41003a8624438b2507e79c1b7208d [2022-12-05 20:14:25,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 20:14:25,922 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 20:14:25,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 20:14:25,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 20:14:25,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 20:14:25,925 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 08:14:25" (1/1) ... [2022-12-05 20:14:25,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e416f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:25, skipping insertion in model container [2022-12-05 20:14:25,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 08:14:25" (1/1) ... [2022-12-05 20:14:25,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 20:14:25,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 20:14:26,165 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:14:26,166 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:14:26,168 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:14:26,169 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:14:26,174 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:14:26,176 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:14:26,176 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:14:26,177 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:14:26,177 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i[30962,30975] [2022-12-05 20:14:26,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 20:14:26,186 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 20:14:26,220 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:14:26,221 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:14:26,221 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:14:26,221 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:14:26,223 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:14:26,223 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:14:26,224 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:14:26,224 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:14:26,224 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i[30962,30975] [2022-12-05 20:14:26,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 20:14:26,255 INFO L208 MainTranslator]: Completed translation [2022-12-05 20:14:26,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:26 WrapperNode [2022-12-05 20:14:26,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 20:14:26,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 20:14:26,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 20:14:26,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 20:14:26,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:26" (1/1) ... [2022-12-05 20:14:26,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:26" (1/1) ... [2022-12-05 20:14:26,299 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-12-05 20:14:26,300 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 20:14:26,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 20:14:26,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 20:14:26,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 20:14:26,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:26" (1/1) ... [2022-12-05 20:14:26,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:26" (1/1) ... [2022-12-05 20:14:26,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:26" (1/1) ... [2022-12-05 20:14:26,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:26" (1/1) ... [2022-12-05 20:14:26,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:26" (1/1) ... [2022-12-05 20:14:26,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:26" (1/1) ... [2022-12-05 20:14:26,329 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:26" (1/1) ... [2022-12-05 20:14:26,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:26" (1/1) ... [2022-12-05 20:14:26,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 20:14:26,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 20:14:26,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 20:14:26,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 20:14:26,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:26" (1/1) ... [2022-12-05 20:14:26,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 20:14:26,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:14:26,360 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 20:14:26,378 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 20:14:26,389 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-05 20:14:26,390 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-05 20:14:26,390 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-05 20:14:26,390 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-05 20:14:26,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 20:14:26,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 20:14:26,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 20:14:26,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 20:14:26,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 20:14:26,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 20:14:26,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 20:14:26,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 20:14:26,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 20:14:26,392 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 20:14:26,514 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 20:14:26,516 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 20:14:26,671 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 20:14:26,675 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 20:14:26,675 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-05 20:14:26,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 08:14:26 BoogieIcfgContainer [2022-12-05 20:14:26,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 20:14:26,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 20:14:26,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 20:14:26,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 20:14:26,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 08:14:25" (1/3) ... [2022-12-05 20:14:26,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2949fe96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 08:14:26, skipping insertion in model container [2022-12-05 20:14:26,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:14:26" (2/3) ... [2022-12-05 20:14:26,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2949fe96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 08:14:26, skipping insertion in model container [2022-12-05 20:14:26,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 08:14:26" (3/3) ... [2022-12-05 20:14:26,686 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2022-12-05 20:14:26,699 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 20:14:26,699 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 20:14:26,699 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 20:14:26,759 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-05 20:14:26,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2022-12-05 20:14:26,829 INFO L130 PetriNetUnfolder]: 5/64 cut-off events. [2022-12-05 20:14:26,830 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-05 20:14:26,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2022-12-05 20:14:26,836 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 142 flow [2022-12-05 20:14:26,840 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 64 transitions, 134 flow [2022-12-05 20:14:26,841 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 20:14:26,864 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 66 places, 64 transitions, 134 flow [2022-12-05 20:14:26,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 64 transitions, 134 flow [2022-12-05 20:14:26,891 INFO L130 PetriNetUnfolder]: 5/64 cut-off events. [2022-12-05 20:14:26,891 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-05 20:14:26,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2022-12-05 20:14:26,894 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 66 places, 64 transitions, 134 flow [2022-12-05 20:14:26,894 INFO L188 LiptonReduction]: Number of co-enabled transitions 1078 [2022-12-05 20:14:28,725 INFO L203 LiptonReduction]: Total number of compositions: 51 [2022-12-05 20:14:28,743 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 20:14:28,749 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;@6bd74685, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 20:14:28,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-05 20:14:28,758 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2022-12-05 20:14:28,758 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-05 20:14:28,758 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:28,759 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-05 20:14:28,759 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:28,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:28,762 INFO L85 PathProgramCache]: Analyzing trace with hash -977143138, now seen corresponding path program 1 times [2022-12-05 20:14:28,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:28,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023556883] [2022-12-05 20:14:28,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:28,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:29,104 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 20:14:29,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:29,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023556883] [2022-12-05 20:14:29,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023556883] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:14:29,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:14:29,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 20:14:29,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943274317] [2022-12-05 20:14:29,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:14:29,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 20:14:29,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:29,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 20:14:29,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 20:14:29,133 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:29,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 13 transitions, 32 flow. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 20:14:29,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:29,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:29,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:29,211 INFO L130 PetriNetUnfolder]: 94/152 cut-off events. [2022-12-05 20:14:29,211 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 20:14:29,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 152 events. 94/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 395 event pairs, 11 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 306. Up to 76 conditions per place. [2022-12-05 20:14:29,214 INFO L137 encePairwiseOnDemand]: 9/13 looper letters, 18 selfloop transitions, 4 changer transitions 4/26 dead transitions. [2022-12-05 20:14:29,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 26 transitions, 110 flow [2022-12-05 20:14:29,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 20:14:29,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 20:14:29,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 27 transitions. [2022-12-05 20:14:29,222 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2022-12-05 20:14:29,223 INFO L175 Difference]: Start difference. First operand has 18 places, 13 transitions, 32 flow. Second operand 4 states and 27 transitions. [2022-12-05 20:14:29,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 26 transitions, 110 flow [2022-12-05 20:14:29,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-05 20:14:29,228 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 53 flow [2022-12-05 20:14:29,229 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2022-12-05 20:14:29,232 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2022-12-05 20:14:29,232 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 53 flow [2022-12-05 20:14:29,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 20:14:29,232 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:29,232 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:29,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 20:14:29,233 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:29,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:29,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1562132877, now seen corresponding path program 1 times [2022-12-05 20:14:29,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:29,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528232516] [2022-12-05 20:14:29,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:29,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:29,386 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 20:14:29,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:29,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528232516] [2022-12-05 20:14:29,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528232516] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:14:29,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:14:29,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 20:14:29,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028613108] [2022-12-05 20:14:29,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:14:29,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 20:14:29,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:29,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 20:14:29,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 20:14:29,388 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:29,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 53 flow. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states 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 20:14:29,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:29,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:29,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:29,489 INFO L130 PetriNetUnfolder]: 126/217 cut-off events. [2022-12-05 20:14:29,490 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2022-12-05 20:14:29,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 217 events. 126/217 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 664 event pairs, 19 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 535. Up to 89 conditions per place. [2022-12-05 20:14:29,491 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2022-12-05 20:14:29,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 215 flow [2022-12-05 20:14:29,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 20:14:29,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 20:14:29,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 38 transitions. [2022-12-05 20:14:29,492 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2022-12-05 20:14:29,493 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 53 flow. Second operand 6 states and 38 transitions. [2022-12-05 20:14:29,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 215 flow [2022-12-05 20:14:29,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 42 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-05 20:14:29,494 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 134 flow [2022-12-05 20:14:29,494 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2022-12-05 20:14:29,495 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 11 predicate places. [2022-12-05 20:14:29,495 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 134 flow [2022-12-05 20:14:29,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states 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 20:14:29,495 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:29,495 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:29,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 20:14:29,496 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:29,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:29,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1562125437, now seen corresponding path program 2 times [2022-12-05 20:14:29,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:29,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868952189] [2022-12-05 20:14:29,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:29,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:29,606 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 20:14:29,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:29,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868952189] [2022-12-05 20:14:29,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868952189] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:14:29,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:14:29,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 20:14:29,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124778718] [2022-12-05 20:14:29,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:14:29,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 20:14:29,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:29,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 20:14:29,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-05 20:14:29,611 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:29,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 134 flow. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states 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 20:14:29,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:29,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:29,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:29,703 INFO L130 PetriNetUnfolder]: 126/219 cut-off events. [2022-12-05 20:14:29,704 INFO L131 PetriNetUnfolder]: For 298/298 co-relation queries the response was YES. [2022-12-05 20:14:29,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 219 events. 126/219 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 681 event pairs, 31 based on Foata normal form. 10/229 useless extension candidates. Maximal degree in co-relation 704. Up to 87 conditions per place. [2022-12-05 20:14:29,710 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 29 selfloop transitions, 15 changer transitions 8/52 dead transitions. [2022-12-05 20:14:29,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 348 flow [2022-12-05 20:14:29,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 20:14:29,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 20:14:29,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 42 transitions. [2022-12-05 20:14:29,712 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2022-12-05 20:14:29,712 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 134 flow. Second operand 7 states and 42 transitions. [2022-12-05 20:14:29,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 348 flow [2022-12-05 20:14:29,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 52 transitions, 344 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-12-05 20:14:29,716 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 240 flow [2022-12-05 20:14:29,717 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2022-12-05 20:14:29,717 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 21 predicate places. [2022-12-05 20:14:29,718 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 240 flow [2022-12-05 20:14:29,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states 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 20:14:29,718 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:29,718 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:29,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-05 20:14:29,718 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:29,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:29,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1571069540, now seen corresponding path program 1 times [2022-12-05 20:14:29,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:29,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283687957] [2022-12-05 20:14:29,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:29,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:29,832 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 20:14:29,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:29,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283687957] [2022-12-05 20:14:29,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283687957] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:14:29,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:14:29,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 20:14:29,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512310546] [2022-12-05 20:14:29,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:14:29,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 20:14:29,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:29,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 20:14:29,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-05 20:14:29,836 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:29,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 240 flow. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states 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 20:14:29,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:29,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:29,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:29,920 INFO L130 PetriNetUnfolder]: 162/283 cut-off events. [2022-12-05 20:14:29,920 INFO L131 PetriNetUnfolder]: For 821/821 co-relation queries the response was YES. [2022-12-05 20:14:29,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 283 events. 162/283 cut-off events. For 821/821 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 949 event pairs, 16 based on Foata normal form. 8/291 useless extension candidates. Maximal degree in co-relation 1058. Up to 71 conditions per place. [2022-12-05 20:14:29,922 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 37 selfloop transitions, 21 changer transitions 3/61 dead transitions. [2022-12-05 20:14:29,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 488 flow [2022-12-05 20:14:29,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 20:14:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 20:14:29,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 46 transitions. [2022-12-05 20:14:29,925 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2022-12-05 20:14:29,925 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 240 flow. Second operand 8 states and 46 transitions. [2022-12-05 20:14:29,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 488 flow [2022-12-05 20:14:29,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 61 transitions, 467 flow, removed 7 selfloop flow, removed 1 redundant places. [2022-12-05 20:14:29,931 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 346 flow [2022-12-05 20:14:29,932 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=346, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2022-12-05 20:14:29,933 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 31 predicate places. [2022-12-05 20:14:29,933 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 346 flow [2022-12-05 20:14:29,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states 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 20:14:29,933 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:29,933 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:29,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-05 20:14:29,933 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:29,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:29,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1617536060, now seen corresponding path program 2 times [2022-12-05 20:14:29,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:29,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566131926] [2022-12-05 20:14:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:29,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:30,028 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 20:14:30,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:30,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566131926] [2022-12-05 20:14:30,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566131926] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:14:30,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:14:30,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 20:14:30,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001954131] [2022-12-05 20:14:30,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:14:30,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 20:14:30,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:30,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 20:14:30,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-05 20:14:30,030 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:30,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 346 flow. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states 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 20:14:30,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:30,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:30,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:30,117 INFO L130 PetriNetUnfolder]: 154/271 cut-off events. [2022-12-05 20:14:30,117 INFO L131 PetriNetUnfolder]: For 1323/1323 co-relation queries the response was YES. [2022-12-05 20:14:30,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 271 events. 154/271 cut-off events. For 1323/1323 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 922 event pairs, 22 based on Foata normal form. 8/279 useless extension candidates. Maximal degree in co-relation 1179. Up to 67 conditions per place. [2022-12-05 20:14:30,119 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 30 selfloop transitions, 21 changer transitions 8/59 dead transitions. [2022-12-05 20:14:30,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 576 flow [2022-12-05 20:14:30,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 20:14:30,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 20:14:30,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 40 transitions. [2022-12-05 20:14:30,120 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.43956043956043955 [2022-12-05 20:14:30,121 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 346 flow. Second operand 7 states and 40 transitions. [2022-12-05 20:14:30,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 576 flow [2022-12-05 20:14:30,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 537 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-12-05 20:14:30,125 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 398 flow [2022-12-05 20:14:30,126 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=398, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2022-12-05 20:14:30,127 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 35 predicate places. [2022-12-05 20:14:30,128 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 398 flow [2022-12-05 20:14:30,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states 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 20:14:30,128 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:30,128 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:30,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-05 20:14:30,128 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:30,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:30,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1395976800, now seen corresponding path program 3 times [2022-12-05 20:14:30,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:30,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180865046] [2022-12-05 20:14:30,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:30,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:30,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:30,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180865046] [2022-12-05 20:14:30,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180865046] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:14:30,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273637514] [2022-12-05 20:14:30,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 20:14:30,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:30,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:14:30,237 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 20:14:30,287 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 20:14:30,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 20:14:30,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:14:30,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-05 20:14:30,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:14:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:30,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:14:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:30,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273637514] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:14:30,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:14:30,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-05 20:14:30,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410059141] [2022-12-05 20:14:30,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:14:30,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 20:14:30,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:30,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 20:14:30,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-12-05 20:14:30,440 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:30,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 398 flow. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:30,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:30,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:30,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:30,629 INFO L130 PetriNetUnfolder]: 202/351 cut-off events. [2022-12-05 20:14:30,629 INFO L131 PetriNetUnfolder]: For 2205/2205 co-relation queries the response was YES. [2022-12-05 20:14:30,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 351 events. 202/351 cut-off events. For 2205/2205 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1201 event pairs, 18 based on Foata normal form. 16/367 useless extension candidates. Maximal degree in co-relation 1647. Up to 87 conditions per place. [2022-12-05 20:14:30,631 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 34 selfloop transitions, 36 changer transitions 22/92 dead transitions. [2022-12-05 20:14:30,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 92 transitions, 958 flow [2022-12-05 20:14:30,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-05 20:14:30,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-05 20:14:30,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 74 transitions. [2022-12-05 20:14:30,639 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4065934065934066 [2022-12-05 20:14:30,639 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 398 flow. Second operand 14 states and 74 transitions. [2022-12-05 20:14:30,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 92 transitions, 958 flow [2022-12-05 20:14:30,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 92 transitions, 893 flow, removed 15 selfloop flow, removed 6 redundant places. [2022-12-05 20:14:30,645 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 701 flow [2022-12-05 20:14:30,645 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=701, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2022-12-05 20:14:30,645 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 47 predicate places. [2022-12-05 20:14:30,645 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 701 flow [2022-12-05 20:14:30,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:30,646 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:30,646 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:30,653 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 20:14:30,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-05 20:14:30,851 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:30,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:30,851 INFO L85 PathProgramCache]: Analyzing trace with hash -635261783, now seen corresponding path program 4 times [2022-12-05 20:14:30,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:30,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759167674] [2022-12-05 20:14:30,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:30,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:30,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 20:14:30,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:30,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759167674] [2022-12-05 20:14:30,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759167674] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:14:30,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607175308] [2022-12-05 20:14:30,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 20:14:30,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:30,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:14:30,951 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 20:14:30,953 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 20:14:31,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 20:14:31,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:14:31,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-05 20:14:31,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:14:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 20:14:31,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:14:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 20:14:31,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607175308] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:14:31,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:14:31,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-12-05 20:14:31,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644899119] [2022-12-05 20:14:31,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:14:31,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 20:14:31,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:31,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 20:14:31,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-12-05 20:14:31,170 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:31,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 701 flow. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:31,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:31,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:31,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:31,430 INFO L130 PetriNetUnfolder]: 258/463 cut-off events. [2022-12-05 20:14:31,430 INFO L131 PetriNetUnfolder]: For 4313/4313 co-relation queries the response was YES. [2022-12-05 20:14:31,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2445 conditions, 463 events. 258/463 cut-off events. For 4313/4313 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1634 event pairs, 55 based on Foata normal form. 32/495 useless extension candidates. Maximal degree in co-relation 2411. Up to 237 conditions per place. [2022-12-05 20:14:31,433 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 64 selfloop transitions, 27 changer transitions 27/118 dead transitions. [2022-12-05 20:14:31,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 118 transitions, 1469 flow [2022-12-05 20:14:31,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-05 20:14:31,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-05 20:14:31,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 83 transitions. [2022-12-05 20:14:31,434 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.39903846153846156 [2022-12-05 20:14:31,434 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 701 flow. Second operand 16 states and 83 transitions. [2022-12-05 20:14:31,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 118 transitions, 1469 flow [2022-12-05 20:14:31,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 118 transitions, 1110 flow, removed 167 selfloop flow, removed 5 redundant places. [2022-12-05 20:14:31,458 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 781 flow [2022-12-05 20:14:31,458 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=781, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2022-12-05 20:14:31,459 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 67 predicate places. [2022-12-05 20:14:31,459 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 781 flow [2022-12-05 20:14:31,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:31,459 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:31,459 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:31,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-05 20:14:31,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-05 20:14:31,666 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:31,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:31,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1112219577, now seen corresponding path program 5 times [2022-12-05 20:14:31,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:31,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595421448] [2022-12-05 20:14:31,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:31,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 20:14:31,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:31,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595421448] [2022-12-05 20:14:31,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595421448] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:14:31,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485403565] [2022-12-05 20:14:31,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 20:14:31,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:31,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:14:31,785 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 20:14:31,787 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 20:14:31,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-05 20:14:31,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:14:31,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-05 20:14:31,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:14:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 20:14:31,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:14:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 20:14:32,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485403565] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:14:32,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:14:32,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-05 20:14:32,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460170981] [2022-12-05 20:14:32,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:14:32,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-05 20:14:32,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:32,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-05 20:14:32,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-12-05 20:14:32,018 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:32,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 781 flow. Second operand has 17 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:32,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:32,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:32,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:32,408 INFO L130 PetriNetUnfolder]: 412/755 cut-off events. [2022-12-05 20:14:32,409 INFO L131 PetriNetUnfolder]: For 12167/12167 co-relation queries the response was YES. [2022-12-05 20:14:32,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4019 conditions, 755 events. 412/755 cut-off events. For 12167/12167 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3325 event pairs, 42 based on Foata normal form. 32/787 useless extension candidates. Maximal degree in co-relation 3976. Up to 227 conditions per place. [2022-12-05 20:14:32,413 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 73 selfloop transitions, 72 changer transitions 37/182 dead transitions. [2022-12-05 20:14:32,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 182 transitions, 2101 flow [2022-12-05 20:14:32,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-05 20:14:32,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-05 20:14:32,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 114 transitions. [2022-12-05 20:14:32,428 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3986013986013986 [2022-12-05 20:14:32,428 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 781 flow. Second operand 22 states and 114 transitions. [2022-12-05 20:14:32,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 182 transitions, 2101 flow [2022-12-05 20:14:32,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 182 transitions, 1980 flow, removed 51 selfloop flow, removed 4 redundant places. [2022-12-05 20:14:32,503 INFO L231 Difference]: Finished difference. Result has 116 places, 108 transitions, 1490 flow [2022-12-05 20:14:32,504 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1490, PETRI_PLACES=116, PETRI_TRANSITIONS=108} [2022-12-05 20:14:32,505 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 98 predicate places. [2022-12-05 20:14:32,505 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 108 transitions, 1490 flow [2022-12-05 20:14:32,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:32,505 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:32,505 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:32,512 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 20:14:32,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:32,710 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:32,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:32,711 INFO L85 PathProgramCache]: Analyzing trace with hash -835733511, now seen corresponding path program 6 times [2022-12-05 20:14:32,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:32,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977722452] [2022-12-05 20:14:32,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:32,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 20:14:32,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:32,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977722452] [2022-12-05 20:14:32,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977722452] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:14:32,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932325877] [2022-12-05 20:14:32,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 20:14:32,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:32,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:14:32,821 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 20:14:32,835 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 20:14:32,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-05 20:14:32,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:14:32,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-05 20:14:32,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:14:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 20:14:32,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:14:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 20:14:33,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932325877] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:14:33,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:14:33,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-12-05 20:14:33,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902713501] [2022-12-05 20:14:33,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:14:33,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 20:14:33,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:33,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 20:14:33,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-12-05 20:14:33,011 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:33,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 108 transitions, 1490 flow. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:33,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:33,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:33,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:33,434 INFO L130 PetriNetUnfolder]: 612/1111 cut-off events. [2022-12-05 20:14:33,434 INFO L131 PetriNetUnfolder]: For 37949/37949 co-relation queries the response was YES. [2022-12-05 20:14:33,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7830 conditions, 1111 events. 612/1111 cut-off events. For 37949/37949 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5401 event pairs, 31 based on Foata normal form. 36/1147 useless extension candidates. Maximal degree in co-relation 7772. Up to 355 conditions per place. [2022-12-05 20:14:33,442 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 71 selfloop transitions, 134 changer transitions 41/246 dead transitions. [2022-12-05 20:14:33,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 246 transitions, 3764 flow [2022-12-05 20:14:33,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-05 20:14:33,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-05 20:14:33,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 140 transitions. [2022-12-05 20:14:33,444 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.39886039886039887 [2022-12-05 20:14:33,444 INFO L175 Difference]: Start difference. First operand has 116 places, 108 transitions, 1490 flow. Second operand 27 states and 140 transitions. [2022-12-05 20:14:33,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 246 transitions, 3764 flow [2022-12-05 20:14:33,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 246 transitions, 3448 flow, removed 148 selfloop flow, removed 4 redundant places. [2022-12-05 20:14:33,490 INFO L231 Difference]: Finished difference. Result has 153 places, 158 transitions, 2642 flow [2022-12-05 20:14:33,491 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2642, PETRI_PLACES=153, PETRI_TRANSITIONS=158} [2022-12-05 20:14:33,491 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 135 predicate places. [2022-12-05 20:14:33,491 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 158 transitions, 2642 flow [2022-12-05 20:14:33,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:33,491 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:33,491 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:33,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-05 20:14:33,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:33,696 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:33,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:33,696 INFO L85 PathProgramCache]: Analyzing trace with hash -240349933, now seen corresponding path program 7 times [2022-12-05 20:14:33,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:33,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506710097] [2022-12-05 20:14:33,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:33,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:33,776 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 20:14:33,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:33,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506710097] [2022-12-05 20:14:33,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506710097] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:14:33,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576389226] [2022-12-05 20:14:33,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 20:14:33,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:33,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:14:33,777 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 20:14:33,779 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 20:14:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:33,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 20:14:33,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:14:33,857 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 20:14:33,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:14:33,930 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 20:14:33,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576389226] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:14:33,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:14:33,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-12-05 20:14:33,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863313617] [2022-12-05 20:14:33,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:14:33,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 20:14:33,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:33,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 20:14:33,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-12-05 20:14:33,931 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:33,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 158 transitions, 2642 flow. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:33,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:33,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:33,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:34,535 INFO L130 PetriNetUnfolder]: 756/1375 cut-off events. [2022-12-05 20:14:34,535 INFO L131 PetriNetUnfolder]: For 84622/84622 co-relation queries the response was YES. [2022-12-05 20:14:34,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12537 conditions, 1375 events. 756/1375 cut-off events. For 84622/84622 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6897 event pairs, 12 based on Foata normal form. 40/1415 useless extension candidates. Maximal degree in co-relation 12465. Up to 458 conditions per place. [2022-12-05 20:14:34,546 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 62 selfloop transitions, 176 changer transitions 54/292 dead transitions. [2022-12-05 20:14:34,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 292 transitions, 6017 flow [2022-12-05 20:14:34,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-05 20:14:34,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-05 20:14:34,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 154 transitions. [2022-12-05 20:14:34,547 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.39487179487179486 [2022-12-05 20:14:34,547 INFO L175 Difference]: Start difference. First operand has 153 places, 158 transitions, 2642 flow. Second operand 30 states and 154 transitions. [2022-12-05 20:14:34,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 292 transitions, 6017 flow [2022-12-05 20:14:34,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 292 transitions, 4596 flow, removed 681 selfloop flow, removed 11 redundant places. [2022-12-05 20:14:34,668 INFO L231 Difference]: Finished difference. Result has 186 places, 202 transitions, 3515 flow [2022-12-05 20:14:34,669 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3515, PETRI_PLACES=186, PETRI_TRANSITIONS=202} [2022-12-05 20:14:34,669 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 168 predicate places. [2022-12-05 20:14:34,669 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 202 transitions, 3515 flow [2022-12-05 20:14:34,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:34,669 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:34,669 INFO L213 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:34,677 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 20:14:34,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-05 20:14:34,874 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:34,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:34,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1304283367, now seen corresponding path program 8 times [2022-12-05 20:14:34,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:34,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670269003] [2022-12-05 20:14:34,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:34,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:35,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:35,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670269003] [2022-12-05 20:14:35,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670269003] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:14:35,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085983933] [2022-12-05 20:14:35,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 20:14:35,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:35,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:14:35,062 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 20:14:35,063 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 20:14:35,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 20:14:35,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:14:35,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-05 20:14:35,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:14:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:35,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:14:35,326 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:35,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085983933] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:14:35,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:14:35,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2022-12-05 20:14:35,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030624486] [2022-12-05 20:14:35,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:14:35,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-05 20:14:35,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:35,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-05 20:14:35,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2022-12-05 20:14:35,328 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:35,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 202 transitions, 3515 flow. Second operand has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:35,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:35,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:35,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:36,408 INFO L130 PetriNetUnfolder]: 940/1683 cut-off events. [2022-12-05 20:14:36,408 INFO L131 PetriNetUnfolder]: For 118090/118090 co-relation queries the response was YES. [2022-12-05 20:14:36,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16451 conditions, 1683 events. 940/1683 cut-off events. For 118090/118090 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7991 event pairs, 18 based on Foata normal form. 52/1735 useless extension candidates. Maximal degree in co-relation 16366. Up to 574 conditions per place. [2022-12-05 20:14:36,424 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 90 selfloop transitions, 222 changer transitions 98/410 dead transitions. [2022-12-05 20:14:36,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 410 transitions, 8862 flow [2022-12-05 20:14:36,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-05 20:14:36,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-12-05 20:14:36,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 258 transitions. [2022-12-05 20:14:36,457 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3816568047337278 [2022-12-05 20:14:36,457 INFO L175 Difference]: Start difference. First operand has 186 places, 202 transitions, 3515 flow. Second operand 52 states and 258 transitions. [2022-12-05 20:14:36,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 410 transitions, 8862 flow [2022-12-05 20:14:36,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 410 transitions, 7981 flow, removed 412 selfloop flow, removed 8 redundant places. [2022-12-05 20:14:36,642 INFO L231 Difference]: Finished difference. Result has 255 places, 248 transitions, 5156 flow [2022-12-05 20:14:36,643 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=2952, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=5156, PETRI_PLACES=255, PETRI_TRANSITIONS=248} [2022-12-05 20:14:36,643 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 237 predicate places. [2022-12-05 20:14:36,643 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 248 transitions, 5156 flow [2022-12-05 20:14:36,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:36,643 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:36,644 INFO L213 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:36,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-05 20:14:36,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:36,848 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:36,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:36,849 INFO L85 PathProgramCache]: Analyzing trace with hash 2106254646, now seen corresponding path program 9 times [2022-12-05 20:14:36,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:36,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528568361] [2022-12-05 20:14:36,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:36,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:37,229 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:37,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:37,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528568361] [2022-12-05 20:14:37,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528568361] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:14:37,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815575092] [2022-12-05 20:14:37,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 20:14:37,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:37,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:14:37,232 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 20:14:37,234 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 20:14:37,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-05 20:14:37,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:14:37,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-05 20:14:37,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:14:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:37,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:14:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:37,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815575092] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:14:37,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:14:37,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 44 [2022-12-05 20:14:37,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392778839] [2022-12-05 20:14:37,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:14:37,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-05 20:14:37,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:37,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-05 20:14:37,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1579, Unknown=0, NotChecked=0, Total=2070 [2022-12-05 20:14:37,924 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:37,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 248 transitions, 5156 flow. Second operand has 46 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:37,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:37,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:37,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:39,264 INFO L130 PetriNetUnfolder]: 1308/2419 cut-off events. [2022-12-05 20:14:39,264 INFO L131 PetriNetUnfolder]: For 331515/331515 co-relation queries the response was YES. [2022-12-05 20:14:39,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32030 conditions, 2419 events. 1308/2419 cut-off events. For 331515/331515 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 12163 event pairs, 236 based on Foata normal form. 80/2499 useless extension candidates. Maximal degree in co-relation 31919. Up to 993 conditions per place. [2022-12-05 20:14:39,292 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 215 selfloop transitions, 181 changer transitions 93/489 dead transitions. [2022-12-05 20:14:39,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 489 transitions, 14145 flow [2022-12-05 20:14:39,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-05 20:14:39,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-12-05 20:14:39,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 229 transitions. [2022-12-05 20:14:39,294 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.35949764521193095 [2022-12-05 20:14:39,294 INFO L175 Difference]: Start difference. First operand has 255 places, 248 transitions, 5156 flow. Second operand 49 states and 229 transitions. [2022-12-05 20:14:39,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 489 transitions, 14145 flow [2022-12-05 20:14:40,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 489 transitions, 10914 flow, removed 1538 selfloop flow, removed 16 redundant places. [2022-12-05 20:14:40,025 INFO L231 Difference]: Finished difference. Result has 309 places, 342 transitions, 7120 flow [2022-12-05 20:14:40,025 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=3771, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=7120, PETRI_PLACES=309, PETRI_TRANSITIONS=342} [2022-12-05 20:14:40,025 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 291 predicate places. [2022-12-05 20:14:40,026 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 342 transitions, 7120 flow [2022-12-05 20:14:40,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:40,026 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:40,026 INFO L213 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:40,032 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 20:14:40,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:40,231 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:40,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:40,232 INFO L85 PathProgramCache]: Analyzing trace with hash 318216324, now seen corresponding path program 10 times [2022-12-05 20:14:40,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:40,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802085431] [2022-12-05 20:14:40,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:40,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:40,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:40,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802085431] [2022-12-05 20:14:40,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802085431] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:14:40,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026429658] [2022-12-05 20:14:40,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 20:14:40,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:40,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:14:40,605 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 20:14:40,619 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 20:14:40,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 20:14:40,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:14:40,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-05 20:14:40,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:14:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:40,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:14:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:41,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026429658] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:14:41,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:14:41,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-12-05 20:14:41,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583950102] [2022-12-05 20:14:41,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:14:41,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-05 20:14:41,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:41,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-05 20:14:41,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=1973, Unknown=0, NotChecked=0, Total=2450 [2022-12-05 20:14:41,204 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:41,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 342 transitions, 7120 flow. Second operand has 50 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:41,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:41,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:41,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:43,169 INFO L130 PetriNetUnfolder]: 1668/3139 cut-off events. [2022-12-05 20:14:43,170 INFO L131 PetriNetUnfolder]: For 773241/773241 co-relation queries the response was YES. [2022-12-05 20:14:43,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47272 conditions, 3139 events. 1668/3139 cut-off events. For 773241/773241 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 16579 event pairs, 104 based on Foata normal form. 80/3219 useless extension candidates. Maximal degree in co-relation 47138. Up to 1282 conditions per place. [2022-12-05 20:14:43,215 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 148 selfloop transitions, 346 changer transitions 107/601 dead transitions. [2022-12-05 20:14:43,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 601 transitions, 16728 flow [2022-12-05 20:14:43,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-05 20:14:43,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-12-05 20:14:43,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 266 transitions. [2022-12-05 20:14:43,222 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.36538461538461536 [2022-12-05 20:14:43,222 INFO L175 Difference]: Start difference. First operand has 309 places, 342 transitions, 7120 flow. Second operand 56 states and 266 transitions. [2022-12-05 20:14:43,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 601 transitions, 16728 flow [2022-12-05 20:14:44,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 601 transitions, 14966 flow, removed 837 selfloop flow, removed 19 redundant places. [2022-12-05 20:14:44,809 INFO L231 Difference]: Finished difference. Result has 367 places, 435 transitions, 9966 flow [2022-12-05 20:14:44,809 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=9966, PETRI_PLACES=367, PETRI_TRANSITIONS=435} [2022-12-05 20:14:44,810 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 349 predicate places. [2022-12-05 20:14:44,810 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 435 transitions, 9966 flow [2022-12-05 20:14:44,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:44,810 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:44,810 INFO L213 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:44,815 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 20:14:45,014 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,SelfDestructingSolverStorable12 [2022-12-05 20:14:45,015 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:45,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:45,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1064174578, now seen corresponding path program 11 times [2022-12-05 20:14:45,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:45,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503042539] [2022-12-05 20:14:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:45,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:45,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:45,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503042539] [2022-12-05 20:14:45,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503042539] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:14:45,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380923086] [2022-12-05 20:14:45,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 20:14:45,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:45,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:14:45,365 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 20:14:45,367 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 20:14:45,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-12-05 20:14:45,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:14:45,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-05 20:14:45,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:14:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:45,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:14:45,940 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:45,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380923086] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:14:45,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:14:45,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-12-05 20:14:45,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201924792] [2022-12-05 20:14:45,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:14:45,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-05 20:14:45,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:45,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-05 20:14:45,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2013, Unknown=0, NotChecked=0, Total=2450 [2022-12-05 20:14:45,942 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:45,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 435 transitions, 9966 flow. Second operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 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 20:14:45,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:45,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:45,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:48,448 INFO L130 PetriNetUnfolder]: 2004/3779 cut-off events. [2022-12-05 20:14:48,448 INFO L131 PetriNetUnfolder]: For 1440493/1440493 co-relation queries the response was YES. [2022-12-05 20:14:48,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67590 conditions, 3779 events. 2004/3779 cut-off events. For 1440493/1440493 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 20526 event pairs, 50 based on Foata normal form. 80/3859 useless extension candidates. Maximal degree in co-relation 67444. Up to 1578 conditions per place. [2022-12-05 20:14:48,496 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 112 selfloop transitions, 474 changer transitions 125/711 dead transitions. [2022-12-05 20:14:48,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 711 transitions, 22724 flow [2022-12-05 20:14:48,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-05 20:14:48,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-12-05 20:14:48,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 308 transitions. [2022-12-05 20:14:48,497 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.36449704142011835 [2022-12-05 20:14:48,497 INFO L175 Difference]: Start difference. First operand has 367 places, 435 transitions, 9966 flow. Second operand 65 states and 308 transitions. [2022-12-05 20:14:48,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 711 transitions, 22724 flow [2022-12-05 20:14:51,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 711 transitions, 19791 flow, removed 1367 selfloop flow, removed 18 redundant places. [2022-12-05 20:14:51,029 INFO L231 Difference]: Finished difference. Result has 439 places, 522 transitions, 12512 flow [2022-12-05 20:14:51,030 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=7639, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=12512, PETRI_PLACES=439, PETRI_TRANSITIONS=522} [2022-12-05 20:14:51,030 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 421 predicate places. [2022-12-05 20:14:51,030 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 522 transitions, 12512 flow [2022-12-05 20:14:51,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 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 20:14:51,030 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:51,030 INFO L213 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:51,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-05 20:14:51,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-05 20:14:51,235 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:51,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:51,236 INFO L85 PathProgramCache]: Analyzing trace with hash 774718762, now seen corresponding path program 12 times [2022-12-05 20:14:51,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:51,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53390613] [2022-12-05 20:14:51,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:51,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:14:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:51,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:14:51,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53390613] [2022-12-05 20:14:51,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53390613] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:14:51,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757590069] [2022-12-05 20:14:51,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 20:14:51,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:14:51,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:14:51,528 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 20:14:51,554 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 20:14:51,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-12-05 20:14:51,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:14:51,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-05 20:14:51,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:14:51,657 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:51,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:14:52,035 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:14:52,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757590069] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:14:52,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:14:52,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 45 [2022-12-05 20:14:52,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728730391] [2022-12-05 20:14:52,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:14:52,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-05 20:14:52,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:14:52,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-05 20:14:52,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=1650, Unknown=0, NotChecked=0, Total=2162 [2022-12-05 20:14:52,038 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:14:52,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 522 transitions, 12512 flow. Second operand has 47 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:52,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:14:52,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:14:52,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:14:55,506 INFO L130 PetriNetUnfolder]: 2296/4283 cut-off events. [2022-12-05 20:14:55,506 INFO L131 PetriNetUnfolder]: For 2268637/2268637 co-relation queries the response was YES. [2022-12-05 20:14:55,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89929 conditions, 4283 events. 2296/4283 cut-off events. For 2268637/2268637 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 23049 event pairs, 12 based on Foata normal form. 80/4363 useless extension candidates. Maximal degree in co-relation 89758. Up to 1774 conditions per place. [2022-12-05 20:14:55,582 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 123 selfloop transitions, 561 changer transitions 164/848 dead transitions. [2022-12-05 20:14:55,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 848 transitions, 32863 flow [2022-12-05 20:14:55,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-12-05 20:14:55,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2022-12-05 20:14:55,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 413 transitions. [2022-12-05 20:14:55,587 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3737556561085973 [2022-12-05 20:14:55,587 INFO L175 Difference]: Start difference. First operand has 439 places, 522 transitions, 12512 flow. Second operand 85 states and 413 transitions. [2022-12-05 20:14:55,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 848 transitions, 32863 flow [2022-12-05 20:14:59,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 848 transitions, 28635 flow, removed 1913 selfloop flow, removed 23 redundant places. [2022-12-05 20:14:59,470 INFO L231 Difference]: Finished difference. Result has 539 places, 595 transitions, 17154 flow [2022-12-05 20:14:59,470 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=9586, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=489, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=17154, PETRI_PLACES=539, PETRI_TRANSITIONS=595} [2022-12-05 20:14:59,471 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 521 predicate places. [2022-12-05 20:14:59,471 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 595 transitions, 17154 flow [2022-12-05 20:14:59,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:14:59,471 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:14:59,471 INFO L213 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:14:59,476 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 20:14:59,675 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,SelfDestructingSolverStorable14 [2022-12-05 20:14:59,676 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:14:59,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:14:59,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1365326477, now seen corresponding path program 13 times [2022-12-05 20:14:59,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:14:59,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801504945] [2022-12-05 20:14:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:14:59,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:14:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:15:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:15:00,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:15:00,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801504945] [2022-12-05 20:15:00,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801504945] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:15:00,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180852075] [2022-12-05 20:15:00,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 20:15:00,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:15:00,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:15:00,341 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 20:15:00,343 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 20:15:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:15:00,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-05 20:15:00,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:15:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:15:00,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:15:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:15:01,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180852075] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:15:01,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:15:01,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 84 [2022-12-05 20:15:01,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131503117] [2022-12-05 20:15:01,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:15:01,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-12-05 20:15:01,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:15:01,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-12-05 20:15:01,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1738, Invalid=5572, Unknown=0, NotChecked=0, Total=7310 [2022-12-05 20:15:01,334 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:15:01,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 595 transitions, 17154 flow. Second operand has 86 states, 85 states have (on average 1.1411764705882352) internal successors, (97), 85 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 20:15:01,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:15:01,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:15:01,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:15:06,086 INFO L130 PetriNetUnfolder]: 2748/5115 cut-off events. [2022-12-05 20:15:06,086 INFO L131 PetriNetUnfolder]: For 3876586/3876586 co-relation queries the response was YES. [2022-12-05 20:15:06,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130156 conditions, 5115 events. 2748/5115 cut-off events. For 3876586/3876586 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 28033 event pairs, 36 based on Foata normal form. 12/5127 useless extension candidates. Maximal degree in co-relation 129946. Up to 2142 conditions per place. [2022-12-05 20:15:06,191 INFO L137 encePairwiseOnDemand]: 8/13 looper letters, 148 selfloop transitions, 664 changer transitions 170/982 dead transitions. [2022-12-05 20:15:06,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 982 transitions, 41296 flow [2022-12-05 20:15:06,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-12-05 20:15:06,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-12-05 20:15:06,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 410 transitions. [2022-12-05 20:15:06,194 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3583916083916084 [2022-12-05 20:15:06,194 INFO L175 Difference]: Start difference. First operand has 539 places, 595 transitions, 17154 flow. Second operand 88 states and 410 transitions. [2022-12-05 20:15:06,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 982 transitions, 41296 flow [2022-12-05 20:15:17,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 588 places, 982 transitions, 31319 flow, removed 4728 selfloop flow, removed 38 redundant places. [2022-12-05 20:15:17,062 INFO L231 Difference]: Finished difference. Result has 596 places, 708 transitions, 15759 flow [2022-12-05 20:15:17,063 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=11371, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=552, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=15759, PETRI_PLACES=596, PETRI_TRANSITIONS=708} [2022-12-05 20:15:17,063 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 578 predicate places. [2022-12-05 20:15:17,063 INFO L495 AbstractCegarLoop]: Abstraction has has 596 places, 708 transitions, 15759 flow [2022-12-05 20:15:17,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 1.1411764705882352) internal successors, (97), 85 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 20:15:17,064 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:15:17,064 INFO L213 CegarLoopForPetriNet]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:15:17,068 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 20:15:17,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-05 20:15:17,268 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:15:17,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:15:17,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1521558071, now seen corresponding path program 14 times [2022-12-05 20:15:17,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:15:17,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638344799] [2022-12-05 20:15:17,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:15:17,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:15:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:15:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 380 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:15:17,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:15:17,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638344799] [2022-12-05 20:15:17,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638344799] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:15:17,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797659030] [2022-12-05 20:15:17,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 20:15:17,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:15:17,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:15:17,579 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 20:15:17,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-05 20:15:17,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 20:15:17,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:15:17,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-05 20:15:17,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:15:17,708 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:15:17,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 20:15:17,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797659030] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:15:17,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 20:15:17,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2022-12-05 20:15:17,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128447285] [2022-12-05 20:15:17,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:15:17,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-05 20:15:17,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:15:17,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-05 20:15:17,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2022-12-05 20:15:17,710 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 13 [2022-12-05 20:15:17,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 596 places, 708 transitions, 15759 flow. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:15:17,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:15:17,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 13 [2022-12-05 20:15:17,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:15:36,583 INFO L130 PetriNetUnfolder]: 27596/42036 cut-off events. [2022-12-05 20:15:36,583 INFO L131 PetriNetUnfolder]: For 35070809/35070809 co-relation queries the response was YES. [2022-12-05 20:15:38,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 991373 conditions, 42036 events. 27596/42036 cut-off events. For 35070809/35070809 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 268471 event pairs, 325 based on Foata normal form. 1141/43177 useless extension candidates. Maximal degree in co-relation 991158. Up to 17028 conditions per place. [2022-12-05 20:15:38,348 INFO L137 encePairwiseOnDemand]: 10/13 looper letters, 0 selfloop transitions, 0 changer transitions 7869/7869 dead transitions. [2022-12-05 20:15:38,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 7869 transitions, 178831 flow [2022-12-05 20:15:38,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-05 20:15:38,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-05 20:15:38,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 177 transitions. [2022-12-05 20:15:38,349 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5919732441471572 [2022-12-05 20:15:38,349 INFO L175 Difference]: Start difference. First operand has 596 places, 708 transitions, 15759 flow. Second operand 23 states and 177 transitions. [2022-12-05 20:15:38,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 7869 transitions, 178831 flow [2022-12-05 20:17:25,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 7869 transitions, 164343 flow, removed 576 selfloop flow, removed 58 redundant places. [2022-12-05 20:17:25,379 INFO L231 Difference]: Finished difference. Result has 559 places, 0 transitions, 0 flow [2022-12-05 20:17:25,380 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=13173, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=692, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=0, PETRI_PLACES=559, PETRI_TRANSITIONS=0} [2022-12-05 20:17:25,380 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 541 predicate places. [2022-12-05 20:17:25,380 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 0 transitions, 0 flow [2022-12-05 20:17:25,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:17:25,382 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-05 20:17:25,383 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-05 20:17:25,383 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-05 20:17:25,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-05 20:17:25,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-05 20:17:25,584 INFO L458 BasicCegarLoop]: Path program histogram: [14, 2, 1] [2022-12-05 20:17:25,586 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-05 20:17:25,586 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-05 20:17:25,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 08:17:25 BasicIcfg [2022-12-05 20:17:25,589 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-05 20:17:25,589 INFO L158 Benchmark]: Toolchain (without parser) took 179666.67ms. Allocated memory was 212.9MB in the beginning and 6.3GB in the end (delta: 6.1GB). Free memory was 187.5MB in the beginning and 3.2GB in the end (delta: -3.0GB). Peak memory consumption was 3.9GB. Max. memory is 8.0GB. [2022-12-05 20:17:25,589 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 212.9MB. Free memory was 188.7MB in the beginning and 188.6MB in the end (delta: 82.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-12-05 20:17:25,590 INFO L158 Benchmark]: CACSL2BoogieTranslator took 332.22ms. Allocated memory is still 212.9MB. Free memory was 187.5MB in the beginning and 167.3MB in the end (delta: 20.2MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2022-12-05 20:17:25,590 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.81ms. Allocated memory is still 212.9MB. Free memory was 166.7MB in the beginning and 165.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-05 20:17:25,590 INFO L158 Benchmark]: Boogie Preprocessor took 31.07ms. Allocated memory is still 212.9MB. Free memory was 165.2MB in the beginning and 163.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-05 20:17:25,590 INFO L158 Benchmark]: RCFGBuilder took 344.77ms. Allocated memory is still 212.9MB. Free memory was 163.6MB in the beginning and 151.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-12-05 20:17:25,590 INFO L158 Benchmark]: TraceAbstraction took 178910.93ms. Allocated memory was 212.9MB in the beginning and 6.3GB in the end (delta: 6.1GB). Free memory was 150.5MB in the beginning and 3.2GB in the end (delta: -3.1GB). Peak memory consumption was 3.9GB. Max. memory is 8.0GB. [2022-12-05 20:17:25,591 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 212.9MB. Free memory was 188.7MB in the beginning and 188.6MB in the end (delta: 82.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 332.22ms. Allocated memory is still 212.9MB. Free memory was 187.5MB in the beginning and 167.3MB in the end (delta: 20.2MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 43.81ms. Allocated memory is still 212.9MB. Free memory was 166.7MB in the beginning and 165.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.07ms. Allocated memory is still 212.9MB. Free memory was 165.2MB in the beginning and 163.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 344.77ms. Allocated memory is still 212.9MB. Free memory was 163.6MB in the beginning and 151.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 178910.93ms. Allocated memory was 212.9MB in the beginning and 6.3GB in the end (delta: 6.1GB). Free memory was 150.5MB in the beginning and 3.2GB in the end (delta: -3.1GB). Peak memory consumption was 3.9GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 66 PlacesBefore, 18 PlacesAfterwards, 64 TransitionsBefore, 13 TransitionsAfterwards, 1078 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 18 TrivialYvCompositions, 30 ConcurrentYvCompositions, 3 ChoiceCompositions, 51 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 613, independent: 598, independent conditional: 598, independent unconditional: 0, dependent: 15, dependent conditional: 15, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 613, independent: 598, independent conditional: 0, independent unconditional: 598, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 613, independent: 598, independent conditional: 0, independent unconditional: 598, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 613, independent: 598, independent conditional: 0, independent unconditional: 598, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 598, independent: 588, independent conditional: 0, independent unconditional: 588, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 598, independent: 588, independent conditional: 0, independent unconditional: 588, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 10, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 13, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 613, independent: 10, independent conditional: 0, independent unconditional: 10, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 598, unknown conditional: 0, unknown unconditional: 598] , Statistics on independence cache: Total cache size (in pairs): 1033, Positive cache size: 1023, Positive conditional cache size: 0, Positive unconditional cache size: 1023, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 178.8s, OverallIterations: 17, TraceHistogramMax: 21, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 165.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7051 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7051 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 718 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4137 IncrementalHoareTripleChecker+Invalid, 4855 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 718 mSolverCounterUnsat, 0 mSDtfsCounter, 4137 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1232 GetRequests, 339 SyntacticMatches, 20 SemanticMatches, 873 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26371 ImplicationChecksByTransitivity, 11.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17154occurred in iteration=15, InterpolantAutomatonStates: 559, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 7.4s InterpolantComputationTime, 652 NumberOfCodeBlocks, 652 NumberOfCodeBlocksAsserted, 70 NumberOfCheckSat, 868 ConstructedInterpolants, 0 QuantifiedInterpolants, 3641 SizeOfPredicates, 164 NumberOfNonLiveVariables, 2365 ConjunctsInSsa, 252 ConjunctsInUnsatCore, 40 InterpolantComputations, 6 PerfectInterpolantSequences, 792/3443 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-05 20:17:25,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...