/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --traceabstraction.use.on-demand.petri.net.difference true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 20:51:22,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 20:51:22,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 20:51:22,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 20:51:22,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 20:51:22,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 20:51:22,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 20:51:22,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 20:51:22,368 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 20:51:22,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 20:51:22,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 20:51:22,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 20:51:22,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 20:51:22,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 20:51:22,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 20:51:22,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 20:51:22,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 20:51:22,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 20:51:22,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 20:51:22,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 20:51:22,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 20:51:22,388 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 20:51:22,390 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 20:51:22,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 20:51:22,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 20:51:22,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 20:51:22,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 20:51:22,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 20:51:22,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 20:51:22,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 20:51:22,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 20:51:22,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 20:51:22,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 20:51:22,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 20:51:22,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 20:51:22,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 20:51:22,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 20:51:22,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 20:51:22,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 20:51:22,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 20:51:22,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 20:51:22,412 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-12 20:51:22,441 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 20:51:22,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 20:51:22,442 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 20:51:22,442 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 20:51:22,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 20:51:22,442 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 20:51:22,443 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 20:51:22,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 20:51:22,443 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 20:51:22,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 20:51:22,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 20:51:22,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 20:51:22,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 20:51:22,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 20:51:22,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 20:51:22,444 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 20:51:22,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 20:51:22,444 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 20:51:22,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 20:51:22,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 20:51:22,445 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 20:51:22,445 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 20:51:22,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 20:51:22,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 20:51:22,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 20:51:22,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 20:51:22,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 20:51:22,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 20:51:22,446 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 20:51:22,446 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 20:51:22,446 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true [2022-12-12 20:51:22,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 20:51:22,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 20:51:22,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 20:51:22,802 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 20:51:22,803 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 20:51:22,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c [2022-12-12 20:51:24,092 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 20:51:24,319 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 20:51:24,320 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c [2022-12-12 20:51:24,328 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ff52e76f/2ef56317ad0644e69f43f56a9400d21f/FLAG49e37c05f [2022-12-12 20:51:24,339 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ff52e76f/2ef56317ad0644e69f43f56a9400d21f [2022-12-12 20:51:24,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 20:51:24,343 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 20:51:24,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 20:51:24,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 20:51:24,346 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 20:51:24,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 08:51:24" (1/1) ... [2022-12-12 20:51:24,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dbbd485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:51:24, skipping insertion in model container [2022-12-12 20:51:24,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 08:51:24" (1/1) ... [2022-12-12 20:51:24,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 20:51:24,371 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 20:51:24,500 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c[2428,2441] [2022-12-12 20:51:24,507 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 20:51:24,521 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 20:51:24,544 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c[2428,2441] [2022-12-12 20:51:24,547 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 20:51:24,559 INFO L208 MainTranslator]: Completed translation [2022-12-12 20:51:24,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:51:24 WrapperNode [2022-12-12 20:51:24,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 20:51:24,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 20:51:24,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 20:51:24,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 20:51:24,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:51:24" (1/1) ... [2022-12-12 20:51:24,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:51:24" (1/1) ... [2022-12-12 20:51:24,600 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 134 [2022-12-12 20:51:24,601 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 20:51:24,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 20:51:24,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 20:51:24,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 20:51:24,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:51:24" (1/1) ... [2022-12-12 20:51:24,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:51:24" (1/1) ... [2022-12-12 20:51:24,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:51:24" (1/1) ... [2022-12-12 20:51:24,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:51:24" (1/1) ... [2022-12-12 20:51:24,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:51:24" (1/1) ... [2022-12-12 20:51:24,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:51:24" (1/1) ... [2022-12-12 20:51:24,621 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:51:24" (1/1) ... [2022-12-12 20:51:24,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:51:24" (1/1) ... [2022-12-12 20:51:24,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 20:51:24,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 20:51:24,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 20:51:24,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 20:51:24,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:51:24" (1/1) ... [2022-12-12 20:51:24,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 20:51:24,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:51:24,653 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-12 20:51:24,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-12 20:51:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 20:51:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 20:51:24,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 20:51:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 20:51:24,679 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 20:51:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 20:51:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 20:51:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 20:51:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 20:51:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 20:51:24,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 20:51:24,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 20:51:24,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 20:51:24,681 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 20:51:24,791 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 20:51:24,793 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 20:51:25,071 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 20:51:25,080 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 20:51:25,080 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-12 20:51:25,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 08:51:25 BoogieIcfgContainer [2022-12-12 20:51:25,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 20:51:25,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 20:51:25,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 20:51:25,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 20:51:25,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 08:51:24" (1/3) ... [2022-12-12 20:51:25,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d914022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 08:51:25, skipping insertion in model container [2022-12-12 20:51:25,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 08:51:24" (2/3) ... [2022-12-12 20:51:25,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d914022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 08:51:25, skipping insertion in model container [2022-12-12 20:51:25,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 08:51:25" (3/3) ... [2022-12-12 20:51:25,090 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2022-12-12 20:51:25,106 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 20:51:25,107 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 20:51:25,107 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 20:51:25,229 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-12 20:51:25,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 154 transitions, 324 flow [2022-12-12 20:51:25,387 INFO L130 PetriNetUnfolder]: 14/152 cut-off events. [2022-12-12 20:51:25,388 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 20:51:25,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 152 events. 14/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 145 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 97. Up to 2 conditions per place. [2022-12-12 20:51:25,393 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 154 transitions, 324 flow [2022-12-12 20:51:25,402 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 144 transitions, 300 flow [2022-12-12 20:51:25,404 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 20:51:25,431 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 144 transitions, 300 flow [2022-12-12 20:51:25,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 144 transitions, 300 flow [2022-12-12 20:51:25,489 INFO L130 PetriNetUnfolder]: 14/144 cut-off events. [2022-12-12 20:51:25,489 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 20:51:25,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 144 events. 14/144 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 138 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 97. Up to 2 conditions per place. [2022-12-12 20:51:25,496 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 144 transitions, 300 flow [2022-12-12 20:51:25,496 INFO L226 LiptonReduction]: Number of co-enabled transitions 1942 [2022-12-12 20:51:29,628 INFO L241 LiptonReduction]: Total number of compositions: 127 [2022-12-12 20:51:29,641 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 20:51:29,646 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;@483d79b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 20:51:29,646 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-12 20:51:29,650 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-12-12 20:51:29,650 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 20:51:29,650 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:51:29,651 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:51:29,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:51:29,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:51:29,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1849926836, now seen corresponding path program 1 times [2022-12-12 20:51:29,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:51:29,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395371026] [2022-12-12 20:51:29,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:51:29,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:51:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:51:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:51:29,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:51:29,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395371026] [2022-12-12 20:51:29,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395371026] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:51:29,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 20:51:29,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 20:51:29,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433476035] [2022-12-12 20:51:29,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:51:30,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 20:51:30,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:51:30,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 20:51:30,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 20:51:30,022 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 20:51:30,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:30,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:51:30,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 20:51:30,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:51:30,075 INFO L130 PetriNetUnfolder]: 45/80 cut-off events. [2022-12-12 20:51:30,075 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-12 20:51:30,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 80 events. 45/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 169 event pairs, 18 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2022-12-12 20:51:30,078 INFO L137 encePairwiseOnDemand]: 14/17 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2022-12-12 20:51:30,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2022-12-12 20:51:30,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 20:51:30,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 20:51:30,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 23 transitions. [2022-12-12 20:51:30,088 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2022-12-12 20:51:30,091 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 2 predicate places. [2022-12-12 20:51:30,091 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 18 transitions, 80 flow [2022-12-12 20:51:30,092 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 80 flow [2022-12-12 20:51:30,093 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 18 transitions, 80 flow [2022-12-12 20:51:30,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:30,093 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:51:30,093 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:51:30,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 20:51:30,093 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:51:30,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:51:30,094 INFO L85 PathProgramCache]: Analyzing trace with hash 908274848, now seen corresponding path program 1 times [2022-12-12 20:51:30,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:51:30,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635876324] [2022-12-12 20:51:30,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:51:30,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:51:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:51:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:51:30,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:51:30,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635876324] [2022-12-12 20:51:30,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635876324] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:51:30,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 20:51:30,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-12 20:51:30,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865404350] [2022-12-12 20:51:30,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:51:30,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 20:51:30,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:51:30,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 20:51:30,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 20:51:30,290 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 20:51:30,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:30,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:51:30,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 20:51:30,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:51:30,326 INFO L130 PetriNetUnfolder]: 66/117 cut-off events. [2022-12-12 20:51:30,326 INFO L131 PetriNetUnfolder]: For 16/20 co-relation queries the response was YES. [2022-12-12 20:51:30,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 117 events. 66/117 cut-off events. For 16/20 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 321 event pairs, 9 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 263. Up to 114 conditions per place. [2022-12-12 20:51:30,327 INFO L137 encePairwiseOnDemand]: 13/17 looper letters, 22 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2022-12-12 20:51:30,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 28 transitions, 181 flow [2022-12-12 20:51:30,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 20:51:30,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 20:51:30,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 32 transitions. [2022-12-12 20:51:30,329 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6274509803921569 [2022-12-12 20:51:30,329 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 4 predicate places. [2022-12-12 20:51:30,329 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 28 transitions, 181 flow [2022-12-12 20:51:30,330 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 27 transitions, 172 flow [2022-12-12 20:51:30,330 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 27 transitions, 172 flow [2022-12-12 20:51:30,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:30,331 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:51:30,331 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:51:30,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 20:51:30,331 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:51:30,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:51:30,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1363365745, now seen corresponding path program 1 times [2022-12-12 20:51:30,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:51:30,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680591181] [2022-12-12 20:51:30,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:51:30,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:51:30,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:51:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:51:30,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:51:30,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680591181] [2022-12-12 20:51:30,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680591181] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:51:30,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 20:51:30,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 20:51:30,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626667769] [2022-12-12 20:51:30,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:51:30,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 20:51:30,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:51:30,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 20:51:30,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 20:51:30,448 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:51:30,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 27 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:30,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:51:30,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:51:30,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:51:30,583 INFO L130 PetriNetUnfolder]: 87/168 cut-off events. [2022-12-12 20:51:30,583 INFO L131 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2022-12-12 20:51:30,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 649 conditions, 168 events. 87/168 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 515 event pairs, 10 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 466. Up to 142 conditions per place. [2022-12-12 20:51:30,591 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 41 selfloop transitions, 4 changer transitions 10/55 dead transitions. [2022-12-12 20:51:30,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 55 transitions, 460 flow [2022-12-12 20:51:30,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 20:51:30,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 20:51:30,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 38 transitions. [2022-12-12 20:51:30,620 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4470588235294118 [2022-12-12 20:51:30,621 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 8 predicate places. [2022-12-12 20:51:30,621 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 55 transitions, 460 flow [2022-12-12 20:51:30,622 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 45 transitions, 378 flow [2022-12-12 20:51:30,623 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 45 transitions, 378 flow [2022-12-12 20:51:30,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:30,623 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:51:30,623 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:51:30,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-12 20:51:30,623 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:51:30,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:51:30,624 INFO L85 PathProgramCache]: Analyzing trace with hash -648345457, now seen corresponding path program 2 times [2022-12-12 20:51:30,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:51:30,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514297404] [2022-12-12 20:51:30,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:51:30,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:51:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:51:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:51:30,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:51:30,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514297404] [2022-12-12 20:51:30,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514297404] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:51:30,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559466789] [2022-12-12 20:51:30,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:51:30,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:51:30,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:51:30,763 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:51:30,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 20:51:30,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:51:30,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:51:30,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-12 20:51:30,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:51:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:51:30,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 20:51:30,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559466789] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:51:30,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 20:51:30,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-12-12 20:51:30,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657918410] [2022-12-12 20:51:30,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:51:30,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 20:51:30,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:51:30,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 20:51:30,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 20:51:30,982 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 20:51:30,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 45 transitions, 378 flow. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:30,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:51:30,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 20:51:30,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:51:31,067 INFO L130 PetriNetUnfolder]: 86/159 cut-off events. [2022-12-12 20:51:31,068 INFO L131 PetriNetUnfolder]: For 93/93 co-relation queries the response was YES. [2022-12-12 20:51:31,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 159 events. 86/159 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 444 event pairs, 10 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 550. Up to 135 conditions per place. [2022-12-12 20:51:31,069 INFO L137 encePairwiseOnDemand]: 13/17 looper letters, 45 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2022-12-12 20:51:31,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 52 transitions, 533 flow [2022-12-12 20:51:31,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 20:51:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 20:51:31,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 36 transitions. [2022-12-12 20:51:31,084 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2022-12-12 20:51:31,085 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2022-12-12 20:51:31,085 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 52 transitions, 533 flow [2022-12-12 20:51:31,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 52 transitions, 533 flow [2022-12-12 20:51:31,087 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 52 transitions, 533 flow [2022-12-12 20:51:31,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:31,087 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:51:31,087 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:51:31,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-12 20:51:31,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:51:31,288 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:51:31,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:51:31,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1788720953, now seen corresponding path program 1 times [2022-12-12 20:51:31,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:51:31,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753056871] [2022-12-12 20:51:31,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:51:31,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:51:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:51:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:51:31,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:51:31,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753056871] [2022-12-12 20:51:31,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753056871] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:51:31,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 20:51:31,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 20:51:31,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978916813] [2022-12-12 20:51:31,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:51:31,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 20:51:31,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:51:31,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 20:51:31,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 20:51:31,427 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:51:31,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 52 transitions, 533 flow. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:31,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:51:31,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:51:31,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:51:31,543 INFO L130 PetriNetUnfolder]: 93/184 cut-off events. [2022-12-12 20:51:31,543 INFO L131 PetriNetUnfolder]: For 160/160 co-relation queries the response was YES. [2022-12-12 20:51:31,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 184 events. 93/184 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 592 event pairs, 8 based on Foata normal form. 8/153 useless extension candidates. Maximal degree in co-relation 877. Up to 160 conditions per place. [2022-12-12 20:51:31,545 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 57 selfloop transitions, 6 changer transitions 14/77 dead transitions. [2022-12-12 20:51:31,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 77 transitions, 944 flow [2022-12-12 20:51:31,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 20:51:31,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 20:51:31,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 39 transitions. [2022-12-12 20:51:31,546 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2022-12-12 20:51:31,546 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2022-12-12 20:51:31,547 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 77 transitions, 944 flow [2022-12-12 20:51:31,548 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 63 transitions, 768 flow [2022-12-12 20:51:31,548 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 63 transitions, 768 flow [2022-12-12 20:51:31,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:31,549 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:51:31,549 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:51:31,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-12 20:51:31,549 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:51:31,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:51:31,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1723132359, now seen corresponding path program 2 times [2022-12-12 20:51:31,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:51:31,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085494488] [2022-12-12 20:51:31,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:51:31,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:51:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:51:31,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:51:31,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:51:31,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085494488] [2022-12-12 20:51:31,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085494488] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:51:31,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170035975] [2022-12-12 20:51:31,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:51:31,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:51:31,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:51:31,641 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:51:31,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 20:51:31,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:51:31,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:51:31,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-12 20:51:31,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:51:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:51:31,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 20:51:31,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170035975] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:51:31,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 20:51:31,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-12-12 20:51:31,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206659677] [2022-12-12 20:51:31,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:51:31,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 20:51:31,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:51:31,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 20:51:31,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 20:51:31,785 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 20:51:31,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 63 transitions, 768 flow. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:31,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:51:31,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 20:51:31,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:51:31,846 INFO L130 PetriNetUnfolder]: 92/173 cut-off events. [2022-12-12 20:51:31,846 INFO L131 PetriNetUnfolder]: For 191/191 co-relation queries the response was YES. [2022-12-12 20:51:31,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1181 conditions, 173 events. 92/173 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 494 event pairs, 8 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 976. Up to 153 conditions per place. [2022-12-12 20:51:31,848 INFO L137 encePairwiseOnDemand]: 13/17 looper letters, 59 selfloop transitions, 6 changer transitions 0/68 dead transitions. [2022-12-12 20:51:31,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 68 transitions, 952 flow [2022-12-12 20:51:31,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 20:51:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 20:51:31,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 31 transitions. [2022-12-12 20:51:31,850 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.45588235294117646 [2022-12-12 20:51:31,852 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2022-12-12 20:51:31,852 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 68 transitions, 952 flow [2022-12-12 20:51:31,854 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 68 transitions, 952 flow [2022-12-12 20:51:31,854 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 68 transitions, 952 flow [2022-12-12 20:51:31,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:31,855 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:51:31,855 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:51:31,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 20:51:32,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-12 20:51:32,061 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:51:32,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:51:32,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1602589927, now seen corresponding path program 3 times [2022-12-12 20:51:32,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:51:32,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627471025] [2022-12-12 20:51:32,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:51:32,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:51:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:51:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:51:32,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:51:32,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627471025] [2022-12-12 20:51:32,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627471025] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:51:32,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687562020] [2022-12-12 20:51:32,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 20:51:32,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:51:32,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:51:32,221 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:51:32,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 20:51:32,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 20:51:32,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:51:32,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-12 20:51:32,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:51:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:51:32,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 20:51:32,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687562020] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:51:32,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 20:51:32,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-12-12 20:51:32,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520271364] [2022-12-12 20:51:32,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:51:32,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 20:51:32,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:51:32,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 20:51:32,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-12 20:51:32,352 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 20:51:32,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 68 transitions, 952 flow. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:32,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:51:32,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 20:51:32,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:51:32,415 INFO L130 PetriNetUnfolder]: 94/173 cut-off events. [2022-12-12 20:51:32,415 INFO L131 PetriNetUnfolder]: For 245/245 co-relation queries the response was YES. [2022-12-12 20:51:32,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1344 conditions, 173 events. 94/173 cut-off events. For 245/245 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 479 event pairs, 8 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 1130. Up to 153 conditions per place. [2022-12-12 20:51:32,417 INFO L137 encePairwiseOnDemand]: 13/17 looper letters, 54 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2022-12-12 20:51:32,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 67 transitions, 1063 flow [2022-12-12 20:51:32,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 20:51:32,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 20:51:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 33 transitions. [2022-12-12 20:51:32,418 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4852941176470588 [2022-12-12 20:51:32,419 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2022-12-12 20:51:32,420 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 67 transitions, 1063 flow [2022-12-12 20:51:32,422 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 67 transitions, 1063 flow [2022-12-12 20:51:32,422 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 67 transitions, 1063 flow [2022-12-12 20:51:32,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:32,422 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:51:32,422 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:51:32,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-12 20:51:32,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:51:32,628 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:51:32,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:51:32,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1288154985, now seen corresponding path program 3 times [2022-12-12 20:51:32,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:51:32,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398623772] [2022-12-12 20:51:32,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:51:32,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:51:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:51:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:51:32,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:51:32,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398623772] [2022-12-12 20:51:32,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398623772] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:51:32,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646183943] [2022-12-12 20:51:32,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 20:51:32,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:51:32,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:51:32,773 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:51:32,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 20:51:32,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 20:51:32,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:51:32,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-12 20:51:32,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:51:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:51:32,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 20:51:32,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646183943] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 20:51:32,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 20:51:32,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-12-12 20:51:32,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104219355] [2022-12-12 20:51:32,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 20:51:32,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 20:51:32,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:51:32,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 20:51:32,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-12 20:51:32,915 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 20:51:32,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 67 transitions, 1063 flow. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:32,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:51:32,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 20:51:32,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:51:32,969 INFO L130 PetriNetUnfolder]: 94/167 cut-off events. [2022-12-12 20:51:32,969 INFO L131 PetriNetUnfolder]: For 318/318 co-relation queries the response was YES. [2022-12-12 20:51:32,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1451 conditions, 167 events. 94/167 cut-off events. For 318/318 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 442 event pairs, 8 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 1230. Up to 147 conditions per place. [2022-12-12 20:51:32,971 INFO L137 encePairwiseOnDemand]: 13/17 looper letters, 51 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2022-12-12 20:51:32,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 64 transitions, 1131 flow [2022-12-12 20:51:32,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 20:51:32,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 20:51:32,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 31 transitions. [2022-12-12 20:51:32,974 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.45588235294117646 [2022-12-12 20:51:32,976 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2022-12-12 20:51:32,976 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 64 transitions, 1131 flow [2022-12-12 20:51:32,979 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 64 transitions, 1131 flow [2022-12-12 20:51:32,979 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 64 transitions, 1131 flow [2022-12-12 20:51:32,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:32,979 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:51:32,979 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:51:32,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 20:51:33,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:51:33,185 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:51:33,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:51:33,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1591718308, now seen corresponding path program 1 times [2022-12-12 20:51:33,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:51:33,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241284802] [2022-12-12 20:51:33,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:51:33,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:51:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:51:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 20:51:33,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:51:33,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241284802] [2022-12-12 20:51:33,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241284802] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:51:33,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009320445] [2022-12-12 20:51:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:51:33,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:51:33,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:51:33,288 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:51:33,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 20:51:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:51:33,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-12 20:51:33,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:51:33,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 20:51:33,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 20:51:33,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 20:51:33,572 INFO L321 Elim1Store]: treesize reduction 15, result has 48.3 percent of original size [2022-12-12 20:51:33,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 31 [2022-12-12 20:51:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:51:33,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:51:35,894 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:51:35,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 92 [2022-12-12 20:51:35,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:51:35,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 254 treesize of output 258 [2022-12-12 20:51:35,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:51:35,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 198 [2022-12-12 20:51:35,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:51:35,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 105 [2022-12-12 20:51:36,720 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-12-12 20:51:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:51:36,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009320445] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:51:36,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:51:36,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 15 [2022-12-12 20:51:36,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994279821] [2022-12-12 20:51:36,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:51:36,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 20:51:36,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:51:36,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 20:51:36,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=164, Unknown=4, NotChecked=0, Total=210 [2022-12-12 20:51:36,865 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2022-12-12 20:51:36,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 64 transitions, 1131 flow. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:36,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:51:36,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2022-12-12 20:51:36,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:51:37,652 INFO L130 PetriNetUnfolder]: 287/506 cut-off events. [2022-12-12 20:51:37,652 INFO L131 PetriNetUnfolder]: For 1295/1295 co-relation queries the response was YES. [2022-12-12 20:51:37,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4866 conditions, 506 events. 287/506 cut-off events. For 1295/1295 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2033 event pairs, 10 based on Foata normal form. 2/422 useless extension candidates. Maximal degree in co-relation 3154. Up to 450 conditions per place. [2022-12-12 20:51:37,656 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 58 selfloop transitions, 21 changer transitions 113/195 dead transitions. [2022-12-12 20:51:37,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 195 transitions, 3912 flow [2022-12-12 20:51:37,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 20:51:37,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 20:51:37,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 141 transitions. [2022-12-12 20:51:37,660 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3949579831932773 [2022-12-12 20:51:37,662 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 40 predicate places. [2022-12-12 20:51:37,662 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 195 transitions, 3912 flow [2022-12-12 20:51:37,665 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 82 transitions, 1611 flow [2022-12-12 20:51:37,665 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 82 transitions, 1611 flow [2022-12-12 20:51:37,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:37,666 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:51:37,666 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:51:37,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-12 20:51:37,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:51:37,872 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:51:37,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:51:37,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1638650033, now seen corresponding path program 2 times [2022-12-12 20:51:37,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:51:37,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700453987] [2022-12-12 20:51:37,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:51:37,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:51:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:51:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:51:38,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:51:38,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700453987] [2022-12-12 20:51:38,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700453987] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:51:38,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456134846] [2022-12-12 20:51:38,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:51:38,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:51:38,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:51:38,640 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:51:38,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-12 20:51:38,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:51:38,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:51:38,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-12 20:51:38,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:51:38,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 20:51:38,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 20:51:38,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:51:38,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:51:38,971 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-12 20:51:38,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2022-12-12 20:51:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:51:39,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:51:39,227 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:51:39,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 103 [2022-12-12 20:51:39,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:51:39,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 440 treesize of output 494 [2022-12-12 20:51:39,363 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:51:39,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 356 treesize of output 398 [2022-12-12 20:51:39,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:51:39,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 272 treesize of output 256 [2022-12-12 20:51:42,111 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-12-12 20:51:42,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:51:42,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456134846] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:51:42,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:51:42,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2022-12-12 20:51:42,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029199654] [2022-12-12 20:51:42,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:51:42,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 20:51:42,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:51:42,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 20:51:42,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=358, Unknown=6, NotChecked=0, Total=462 [2022-12-12 20:51:42,248 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 20:51:42,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 82 transitions, 1611 flow. Second operand has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:42,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:51:42,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 20:51:42,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:51:44,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 20:51:44,576 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ (* c_~x1~0 4) c_~f~0.offset)) (.cse3 (+ (* c_~x2~0 4) c_~f~0.offset))) (and (let ((.cse1 (select |c_#memory_int| c_~f~0.base))) (let ((.cse0 (select .cse1 .cse3))) (or (< .cse0 0) (= (select .cse1 .cse2) (select .cse1 (+ (* .cse0 4) c_~f~0.offset))) (<= c_~size~0 .cse0)))) (forall ((v_ArrVal_246 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_246) c_~f~0.base))) (let ((.cse4 (select .cse5 .cse3))) (or (< .cse4 0) (<= c_~size~0 .cse4) (= (select .cse5 .cse2) (select .cse5 (+ c_~f~0.offset (* .cse4 4)))))))))) is different from false [2022-12-12 20:51:44,977 INFO L130 PetriNetUnfolder]: 249/450 cut-off events. [2022-12-12 20:51:44,978 INFO L131 PetriNetUnfolder]: For 1417/1417 co-relation queries the response was YES. [2022-12-12 20:51:44,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4769 conditions, 450 events. 249/450 cut-off events. For 1417/1417 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1637 event pairs, 16 based on Foata normal form. 2/367 useless extension candidates. Maximal degree in co-relation 2793. Up to 406 conditions per place. [2022-12-12 20:51:44,982 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 93 selfloop transitions, 37 changer transitions 37/173 dead transitions. [2022-12-12 20:51:44,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 173 transitions, 3814 flow [2022-12-12 20:51:44,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 20:51:44,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 20:51:44,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 117 transitions. [2022-12-12 20:51:44,984 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.43014705882352944 [2022-12-12 20:51:44,984 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2022-12-12 20:51:44,985 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 173 transitions, 3814 flow [2022-12-12 20:51:44,989 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 136 transitions, 2986 flow [2022-12-12 20:51:44,990 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 136 transitions, 2986 flow [2022-12-12 20:51:44,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:44,990 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:51:44,990 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:51:45,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-12 20:51:45,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:51:45,196 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:51:45,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:51:45,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1887732013, now seen corresponding path program 3 times [2022-12-12 20:51:45,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:51:45,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240099086] [2022-12-12 20:51:45,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:51:45,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:51:45,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:51:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:51:45,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:51:45,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240099086] [2022-12-12 20:51:45,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240099086] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:51:45,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157951132] [2022-12-12 20:51:45,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 20:51:45,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:51:45,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:51:45,976 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:51:45,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-12 20:51:46,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 20:51:46,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:51:46,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-12 20:51:46,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:51:46,213 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:51:46,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2022-12-12 20:51:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:51:46,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:51:46,312 INFO L321 Elim1Store]: treesize reduction 10, result has 85.5 percent of original size [2022-12-12 20:51:46,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 78 [2022-12-12 20:51:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:51:46,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157951132] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:51:46,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:51:46,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 3] total 15 [2022-12-12 20:51:46,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143510191] [2022-12-12 20:51:46,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:51:46,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 20:51:46,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:51:46,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 20:51:46,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-12-12 20:51:46,386 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 20:51:46,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 136 transitions, 2986 flow. Second operand has 17 states, 17 states have (on average 4.352941176470588) internal successors, (74), 17 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:46,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:51:46,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 20:51:46,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:51:46,859 INFO L130 PetriNetUnfolder]: 295/531 cut-off events. [2022-12-12 20:51:46,859 INFO L131 PetriNetUnfolder]: For 2034/2034 co-relation queries the response was YES. [2022-12-12 20:51:46,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6146 conditions, 531 events. 295/531 cut-off events. For 2034/2034 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2054 event pairs, 5 based on Foata normal form. 1/427 useless extension candidates. Maximal degree in co-relation 4219. Up to 486 conditions per place. [2022-12-12 20:51:46,866 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 153 selfloop transitions, 44 changer transitions 1/204 dead transitions. [2022-12-12 20:51:46,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 204 transitions, 4917 flow [2022-12-12 20:51:46,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-12 20:51:46,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-12 20:51:46,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 101 transitions. [2022-12-12 20:51:46,867 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.45701357466063347 [2022-12-12 20:51:46,868 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 52 predicate places. [2022-12-12 20:51:46,868 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 204 transitions, 4917 flow [2022-12-12 20:51:46,876 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 203 transitions, 4890 flow [2022-12-12 20:51:46,876 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 203 transitions, 4890 flow [2022-12-12 20:51:46,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.352941176470588) internal successors, (74), 17 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:46,876 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:51:46,876 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:51:46,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-12 20:51:47,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:51:47,083 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:51:47,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:51:47,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1588671493, now seen corresponding path program 4 times [2022-12-12 20:51:47,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:51:47,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642552364] [2022-12-12 20:51:47,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:51:47,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:51:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:51:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:51:48,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:51:48,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642552364] [2022-12-12 20:51:48,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642552364] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:51:48,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860610465] [2022-12-12 20:51:48,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 20:51:48,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:51:48,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:51:48,191 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:51:48,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-12 20:51:48,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 20:51:48,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:51:48,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-12 20:51:48,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:51:48,433 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:51:48,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2022-12-12 20:51:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:51:48,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:51:48,531 INFO L321 Elim1Store]: treesize reduction 10, result has 85.5 percent of original size [2022-12-12 20:51:48,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 78 [2022-12-12 20:51:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:51:48,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860610465] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:51:48,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:51:48,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 3] total 15 [2022-12-12 20:51:48,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889847986] [2022-12-12 20:51:48,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:51:48,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 20:51:48,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:51:48,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 20:51:48,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-12-12 20:51:48,591 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 20:51:48,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 203 transitions, 4890 flow. Second operand has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:48,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:51:48,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 20:51:48,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:51:49,165 INFO L130 PetriNetUnfolder]: 391/699 cut-off events. [2022-12-12 20:51:49,166 INFO L131 PetriNetUnfolder]: For 3053/3053 co-relation queries the response was YES. [2022-12-12 20:51:49,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8769 conditions, 699 events. 391/699 cut-off events. For 3053/3053 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2942 event pairs, 8 based on Foata normal form. 1/549 useless extension candidates. Maximal degree in co-relation 5784. Up to 646 conditions per place. [2022-12-12 20:51:49,210 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 217 selfloop transitions, 35 changer transitions 1/259 dead transitions. [2022-12-12 20:51:49,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 259 transitions, 6758 flow [2022-12-12 20:51:49,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 20:51:49,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 20:51:49,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 101 transitions. [2022-12-12 20:51:49,212 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.42436974789915966 [2022-12-12 20:51:49,213 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2022-12-12 20:51:49,213 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 259 transitions, 6758 flow [2022-12-12 20:51:49,227 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 258 transitions, 6729 flow [2022-12-12 20:51:49,227 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 258 transitions, 6729 flow [2022-12-12 20:51:49,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:49,228 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:51:49,228 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:51:49,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-12 20:51:49,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-12 20:51:49,436 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:51:49,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:51:49,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1392938805, now seen corresponding path program 5 times [2022-12-12 20:51:49,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:51:49,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293562125] [2022-12-12 20:51:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:51:49,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:51:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:51:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:51:50,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:51:50,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293562125] [2022-12-12 20:51:50,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293562125] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:51:50,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946288401] [2022-12-12 20:51:50,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 20:51:50,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:51:50,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:51:50,524 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:51:50,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-12 20:51:50,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:51:50,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:51:50,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-12 20:51:50,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:51:50,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:51:50,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:51:50,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 20:51:50,846 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-12-12 20:51:50,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 31 [2022-12-12 20:51:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:51:50,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:51:51,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:51:51,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 118 [2022-12-12 20:51:51,030 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:51:51,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 52 [2022-12-12 20:51:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:51:51,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946288401] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:51:51,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:51:51,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 19 [2022-12-12 20:51:51,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358375808] [2022-12-12 20:51:51,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:51:51,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 20:51:51,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:51:51,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 20:51:51,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=359, Unknown=2, NotChecked=0, Total=420 [2022-12-12 20:51:51,243 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 20:51:51,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 258 transitions, 6729 flow. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:51,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:51:51,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 20:51:51,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:51:52,025 INFO L130 PetriNetUnfolder]: 534/955 cut-off events. [2022-12-12 20:51:52,025 INFO L131 PetriNetUnfolder]: For 5621/5621 co-relation queries the response was YES. [2022-12-12 20:51:52,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12852 conditions, 955 events. 534/955 cut-off events. For 5621/5621 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4462 event pairs, 8 based on Foata normal form. 1/751 useless extension candidates. Maximal degree in co-relation 7414. Up to 882 conditions per place. [2022-12-12 20:51:52,036 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 272 selfloop transitions, 74 changer transitions 1/353 dead transitions. [2022-12-12 20:51:52,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 353 transitions, 9953 flow [2022-12-12 20:51:52,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 20:51:52,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 20:51:52,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 111 transitions. [2022-12-12 20:51:52,038 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.46638655462184875 [2022-12-12 20:51:52,038 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 78 predicate places. [2022-12-12 20:51:52,039 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 353 transitions, 9953 flow [2022-12-12 20:51:52,051 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 352 transitions, 9922 flow [2022-12-12 20:51:52,052 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 352 transitions, 9922 flow [2022-12-12 20:51:52,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:52,052 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:51:52,052 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:51:52,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-12 20:51:52,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-12 20:51:52,258 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:51:52,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:51:52,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1129614377, now seen corresponding path program 6 times [2022-12-12 20:51:52,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:51:52,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485896571] [2022-12-12 20:51:52,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:51:52,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:51:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:51:53,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:51:53,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:51:53,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485896571] [2022-12-12 20:51:53,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485896571] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:51:53,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100541389] [2022-12-12 20:51:53,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 20:51:53,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:51:53,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:51:53,237 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:51:53,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-12 20:51:53,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 20:51:53,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:51:53,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-12 20:51:53,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:51:53,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:51:53,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-12-12 20:51:53,529 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:51:53,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2022-12-12 20:51:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 20:51:53,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:51:53,694 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:51:53,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 112 [2022-12-12 20:51:53,708 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:51:53,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2022-12-12 20:51:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:51:53,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100541389] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:51:53,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:51:53,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 19 [2022-12-12 20:51:53,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861885255] [2022-12-12 20:51:53,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:51:53,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 20:51:53,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:51:53,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 20:51:53,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=352, Unknown=2, NotChecked=0, Total=420 [2022-12-12 20:51:53,873 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 20:51:53,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 352 transitions, 9922 flow. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:53,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:51:53,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 20:51:53,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:51:54,876 INFO L130 PetriNetUnfolder]: 762/1368 cut-off events. [2022-12-12 20:51:54,876 INFO L131 PetriNetUnfolder]: For 8239/8239 co-relation queries the response was YES. [2022-12-12 20:51:54,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19853 conditions, 1368 events. 762/1368 cut-off events. For 8239/8239 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6783 event pairs, 8 based on Foata normal form. 2/1035 useless extension candidates. Maximal degree in co-relation 11853. Up to 1285 conditions per place. [2022-12-12 20:51:54,889 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 376 selfloop transitions, 90 changer transitions 2/474 dead transitions. [2022-12-12 20:51:54,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 474 transitions, 14352 flow [2022-12-12 20:51:54,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-12 20:51:54,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-12 20:51:54,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 122 transitions. [2022-12-12 20:51:54,891 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.47843137254901963 [2022-12-12 20:51:54,891 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 92 predicate places. [2022-12-12 20:51:54,891 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 474 transitions, 14352 flow [2022-12-12 20:51:54,908 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 472 transitions, 14286 flow [2022-12-12 20:51:54,908 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 472 transitions, 14286 flow [2022-12-12 20:51:54,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:54,908 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:51:54,909 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:51:54,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-12 20:51:55,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-12 20:51:55,115 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:51:55,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:51:55,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1076159060, now seen corresponding path program 7 times [2022-12-12 20:51:55,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:51:55,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204479912] [2022-12-12 20:51:55,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:51:55,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:51:55,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:51:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:51:55,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:51:55,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204479912] [2022-12-12 20:51:55,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204479912] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:51:55,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016283919] [2022-12-12 20:51:55,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 20:51:55,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:51:55,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:51:55,324 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:51:55,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-12 20:51:55,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:51:55,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:51:55,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:51:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:51:55,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:51:55,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:51:55,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016283919] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:51:55,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:51:55,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-12-12 20:51:55,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709858996] [2022-12-12 20:51:55,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:51:55,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 20:51:55,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:51:55,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 20:51:55,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-12 20:51:55,575 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:51:55,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 472 transitions, 14286 flow. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:55,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:51:55,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:51:55,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:51:56,564 INFO L130 PetriNetUnfolder]: 950/1708 cut-off events. [2022-12-12 20:51:56,565 INFO L131 PetriNetUnfolder]: For 8906/8906 co-relation queries the response was YES. [2022-12-12 20:51:56,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26633 conditions, 1708 events. 950/1708 cut-off events. For 8906/8906 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8995 event pairs, 4 based on Foata normal form. 0/1277 useless extension candidates. Maximal degree in co-relation 16438. Up to 1625 conditions per place. [2022-12-12 20:51:56,580 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 507 selfloop transitions, 77 changer transitions 0/584 dead transitions. [2022-12-12 20:51:56,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 584 transitions, 18817 flow [2022-12-12 20:51:56,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 20:51:56,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 20:51:56,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 87 transitions. [2022-12-12 20:51:56,583 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.46524064171123 [2022-12-12 20:51:56,583 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 102 predicate places. [2022-12-12 20:51:56,583 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 584 transitions, 18817 flow [2022-12-12 20:51:56,602 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 584 transitions, 18817 flow [2022-12-12 20:51:56,603 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 584 transitions, 18817 flow [2022-12-12 20:51:56,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:56,603 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:51:56,603 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:51:56,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-12 20:51:56,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-12 20:51:56,812 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:51:56,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:51:56,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1428951978, now seen corresponding path program 8 times [2022-12-12 20:51:56,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:51:56,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230370269] [2022-12-12 20:51:56,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:51:56,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:51:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:51:56,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:51:56,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:51:56,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230370269] [2022-12-12 20:51:56,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230370269] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:51:56,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893273251] [2022-12-12 20:51:56,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:51:56,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:51:56,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:51:56,979 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:51:56,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-12 20:51:57,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:51:57,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:51:57,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:51:57,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:51:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:51:57,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:51:57,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:51:57,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893273251] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:51:57,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:51:57,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-12-12 20:51:57,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280704250] [2022-12-12 20:51:57,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:51:57,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 20:51:57,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:51:57,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 20:51:57,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-12-12 20:51:57,260 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:51:57,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 584 transitions, 18817 flow. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:57,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:51:57,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:51:57,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:51:58,377 INFO L130 PetriNetUnfolder]: 989/1871 cut-off events. [2022-12-12 20:51:58,377 INFO L131 PetriNetUnfolder]: For 8617/8617 co-relation queries the response was YES. [2022-12-12 20:51:58,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31146 conditions, 1871 events. 989/1871 cut-off events. For 8617/8617 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10827 event pairs, 0 based on Foata normal form. 8/1448 useless extension candidates. Maximal degree in co-relation 18407. Up to 1788 conditions per place. [2022-12-12 20:51:58,392 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 563 selfloop transitions, 195 changer transitions 205/963 dead transitions. [2022-12-12 20:51:58,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 963 transitions, 33002 flow [2022-12-12 20:51:58,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 20:51:58,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 20:51:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 120 transitions. [2022-12-12 20:51:58,394 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.33613445378151263 [2022-12-12 20:51:58,394 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 122 predicate places. [2022-12-12 20:51:58,394 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 963 transitions, 33002 flow [2022-12-12 20:51:58,416 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 758 transitions, 25913 flow [2022-12-12 20:51:58,416 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 758 transitions, 25913 flow [2022-12-12 20:51:58,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:58,417 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:51:58,417 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:51:58,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-12 20:51:58,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-12 20:51:58,622 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:51:58,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:51:58,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1803298804, now seen corresponding path program 9 times [2022-12-12 20:51:58,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:51:58,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417887230] [2022-12-12 20:51:58,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:51:58,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:51:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:51:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:51:58,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:51:58,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417887230] [2022-12-12 20:51:58,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417887230] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:51:58,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272974316] [2022-12-12 20:51:58,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 20:51:58,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:51:58,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:51:58,800 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:51:58,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-12 20:51:58,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 20:51:58,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:51:58,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:51:58,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:51:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:51:59,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:51:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:51:59,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272974316] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:51:59,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:51:59,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-12-12 20:51:59,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933140984] [2022-12-12 20:51:59,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:51:59,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 20:51:59,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:51:59,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 20:51:59,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-12-12 20:51:59,159 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:51:59,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 758 transitions, 25913 flow. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:51:59,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:51:59,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:51:59,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:52:00,775 INFO L130 PetriNetUnfolder]: 887/1711 cut-off events. [2022-12-12 20:52:00,775 INFO L131 PetriNetUnfolder]: For 6114/6114 co-relation queries the response was YES. [2022-12-12 20:52:00,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30339 conditions, 1711 events. 887/1711 cut-off events. For 6114/6114 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9718 event pairs, 0 based on Foata normal form. 4/1332 useless extension candidates. Maximal degree in co-relation 19228. Up to 1644 conditions per place. [2022-12-12 20:52:00,787 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 679 selfloop transitions, 223 changer transitions 22/924 dead transitions. [2022-12-12 20:52:00,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 924 transitions, 33463 flow [2022-12-12 20:52:00,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-12 20:52:00,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-12 20:52:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 133 transitions. [2022-12-12 20:52:00,789 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2022-12-12 20:52:00,789 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 136 predicate places. [2022-12-12 20:52:00,789 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 924 transitions, 33463 flow [2022-12-12 20:52:00,809 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 902 transitions, 32665 flow [2022-12-12 20:52:00,810 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 902 transitions, 32665 flow [2022-12-12 20:52:00,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:52:00,810 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:52:00,810 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:52:00,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-12 20:52:01,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-12 20:52:01,011 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:52:01,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:52:01,011 INFO L85 PathProgramCache]: Analyzing trace with hash -660035252, now seen corresponding path program 10 times [2022-12-12 20:52:01,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:52:01,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315989953] [2022-12-12 20:52:01,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:52:01,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:52:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:52:01,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:01,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:52:01,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315989953] [2022-12-12 20:52:01,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315989953] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:52:01,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454129077] [2022-12-12 20:52:01,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 20:52:01,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:52:01,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:52:01,318 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:52:01,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-12 20:52:01,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 20:52:01,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:52:01,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:52:01,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:52:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:01,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:52:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:01,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454129077] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:52:01,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:52:01,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-12-12 20:52:01,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763473500] [2022-12-12 20:52:01,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:52:01,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 20:52:01,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:52:01,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 20:52:01,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-12-12 20:52:01,656 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:52:01,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 902 transitions, 32665 flow. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:52:01,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:52:01,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:52:01,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:52:03,268 INFO L130 PetriNetUnfolder]: 877/1637 cut-off events. [2022-12-12 20:52:03,268 INFO L131 PetriNetUnfolder]: For 6076/6076 co-relation queries the response was YES. [2022-12-12 20:52:03,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30599 conditions, 1637 events. 877/1637 cut-off events. For 6076/6076 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8817 event pairs, 0 based on Foata normal form. 0/1318 useless extension candidates. Maximal degree in co-relation 20592. Up to 1568 conditions per place. [2022-12-12 20:52:03,283 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 696 selfloop transitions, 197 changer transitions 0/893 dead transitions. [2022-12-12 20:52:03,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 893 transitions, 34041 flow [2022-12-12 20:52:03,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-12 20:52:03,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-12 20:52:03,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 121 transitions. [2022-12-12 20:52:03,284 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3746130030959752 [2022-12-12 20:52:03,285 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 149 predicate places. [2022-12-12 20:52:03,285 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 893 transitions, 34041 flow [2022-12-12 20:52:03,306 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 893 transitions, 34041 flow [2022-12-12 20:52:03,306 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 893 transitions, 34041 flow [2022-12-12 20:52:03,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:52:03,306 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:52:03,307 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:52:03,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-12 20:52:03,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:52:03,512 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:52:03,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:52:03,512 INFO L85 PathProgramCache]: Analyzing trace with hash -279194474, now seen corresponding path program 11 times [2022-12-12 20:52:03,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:52:03,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033910925] [2022-12-12 20:52:03,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:52:03,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:52:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:52:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:03,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:52:03,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033910925] [2022-12-12 20:52:03,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033910925] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:52:03,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398970258] [2022-12-12 20:52:03,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 20:52:03,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:52:03,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:52:03,684 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:52:03,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-12 20:52:03,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:52:03,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:52:03,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:52:03,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:52:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:03,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:52:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:03,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398970258] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:52:03,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:52:03,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-12-12 20:52:03,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761886635] [2022-12-12 20:52:03,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:52:03,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 20:52:03,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:52:03,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 20:52:03,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-12-12 20:52:03,997 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:52:03,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 893 transitions, 34041 flow. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:52:03,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:52:03,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:52:03,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:52:05,680 INFO L130 PetriNetUnfolder]: 918/1818 cut-off events. [2022-12-12 20:52:05,680 INFO L131 PetriNetUnfolder]: For 6503/6503 co-relation queries the response was YES. [2022-12-12 20:52:05,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35878 conditions, 1818 events. 918/1818 cut-off events. For 6503/6503 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 10726 event pairs, 0 based on Foata normal form. 34/1505 useless extension candidates. Maximal degree in co-relation 24534. Up to 1749 conditions per place. [2022-12-12 20:52:05,696 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 718 selfloop transitions, 298 changer transitions 34/1050 dead transitions. [2022-12-12 20:52:05,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 1050 transitions, 42182 flow [2022-12-12 20:52:05,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-12 20:52:05,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-12 20:52:05,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 147 transitions. [2022-12-12 20:52:05,698 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.27893738140417457 [2022-12-12 20:52:05,698 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 179 predicate places. [2022-12-12 20:52:05,698 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 1050 transitions, 42182 flow [2022-12-12 20:52:05,719 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 1016 transitions, 40804 flow [2022-12-12 20:52:05,720 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 1016 transitions, 40804 flow [2022-12-12 20:52:05,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:52:05,720 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:52:05,720 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:52:05,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-12 20:52:05,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:52:05,920 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:52:05,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:52:05,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1983546538, now seen corresponding path program 12 times [2022-12-12 20:52:05,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:52:05,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263273641] [2022-12-12 20:52:05,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:52:05,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:52:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:52:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:06,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:52:06,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263273641] [2022-12-12 20:52:06,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263273641] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:52:06,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198244674] [2022-12-12 20:52:06,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 20:52:06,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:52:06,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:52:06,103 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:52:06,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-12 20:52:06,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 20:52:06,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:52:06,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:52:06,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:52:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:06,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:52:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:06,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198244674] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:52:06,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:52:06,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-12-12 20:52:06,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973590988] [2022-12-12 20:52:06,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:52:06,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 20:52:06,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:52:06,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 20:52:06,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-12-12 20:52:06,417 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:52:06,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 1016 transitions, 40804 flow. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:52:06,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:52:06,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:52:06,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:52:09,118 INFO L130 PetriNetUnfolder]: 1078/2112 cut-off events. [2022-12-12 20:52:09,119 INFO L131 PetriNetUnfolder]: For 6754/6754 co-relation queries the response was YES. [2022-12-12 20:52:09,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43882 conditions, 2112 events. 1078/2112 cut-off events. For 6754/6754 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12904 event pairs, 0 based on Foata normal form. 0/1721 useless extension candidates. Maximal degree in co-relation 30314. Up to 2043 conditions per place. [2022-12-12 20:52:09,135 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 876 selfloop transitions, 353 changer transitions 0/1229 dead transitions. [2022-12-12 20:52:09,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 1229 transitions, 51833 flow [2022-12-12 20:52:09,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-12 20:52:09,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-12 20:52:09,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 193 transitions. [2022-12-12 20:52:09,138 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2911010558069382 [2022-12-12 20:52:09,138 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 216 predicate places. [2022-12-12 20:52:09,138 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 1229 transitions, 51833 flow [2022-12-12 20:52:09,169 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 1229 transitions, 51833 flow [2022-12-12 20:52:09,169 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 1229 transitions, 51833 flow [2022-12-12 20:52:09,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:52:09,170 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:52:09,170 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:52:09,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-12 20:52:09,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:52:09,371 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:52:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:52:09,371 INFO L85 PathProgramCache]: Analyzing trace with hash 2012684192, now seen corresponding path program 13 times [2022-12-12 20:52:09,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:52:09,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619094748] [2022-12-12 20:52:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:52:09,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:52:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:52:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:09,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:52:09,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619094748] [2022-12-12 20:52:09,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619094748] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:52:09,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169250255] [2022-12-12 20:52:09,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 20:52:09,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:52:09,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:52:09,636 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:52:09,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-12 20:52:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:52:09,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:52:09,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:52:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:09,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:52:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:09,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169250255] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:52:09,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:52:09,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-12 20:52:09,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362663686] [2022-12-12 20:52:09,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:52:09,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 20:52:09,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:52:09,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 20:52:09,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-12-12 20:52:09,949 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:52:09,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 1229 transitions, 51833 flow. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:52:09,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:52:09,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:52:09,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:52:13,623 INFO L130 PetriNetUnfolder]: 1217/2383 cut-off events. [2022-12-12 20:52:13,623 INFO L131 PetriNetUnfolder]: For 6781/6781 co-relation queries the response was YES. [2022-12-12 20:52:13,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51968 conditions, 2383 events. 1217/2383 cut-off events. For 6781/6781 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15097 event pairs, 0 based on Foata normal form. 0/1942 useless extension candidates. Maximal degree in co-relation 36680. Up to 2314 conditions per place. [2022-12-12 20:52:13,642 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 1075 selfloop transitions, 319 changer transitions 0/1394 dead transitions. [2022-12-12 20:52:13,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 1394 transitions, 61584 flow [2022-12-12 20:52:13,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-12 20:52:13,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-12 20:52:13,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 164 transitions. [2022-12-12 20:52:13,643 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3445378151260504 [2022-12-12 20:52:13,644 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 241 predicate places. [2022-12-12 20:52:13,644 INFO L82 GeneralOperation]: Start removeDead. Operand has 262 places, 1394 transitions, 61584 flow [2022-12-12 20:52:13,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 1394 transitions, 61584 flow [2022-12-12 20:52:13,676 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 1394 transitions, 61584 flow [2022-12-12 20:52:13,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:52:13,677 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:52:13,677 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:52:13,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-12 20:52:13,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:52:13,878 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:52:13,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:52:13,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1901442326, now seen corresponding path program 14 times [2022-12-12 20:52:13,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:52:13,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694948335] [2022-12-12 20:52:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:52:13,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:52:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:52:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:14,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:52:14,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694948335] [2022-12-12 20:52:14,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694948335] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:52:14,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178184458] [2022-12-12 20:52:14,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:52:14,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:52:14,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:52:14,097 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:52:14,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-12 20:52:14,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:52:14,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:52:14,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:52:14,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:52:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:14,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:52:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:14,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178184458] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:52:14,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:52:14,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-12-12 20:52:14,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079909229] [2022-12-12 20:52:14,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:52:14,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-12 20:52:14,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:52:14,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-12 20:52:14,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-12-12 20:52:14,382 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:52:14,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 1394 transitions, 61584 flow. Second operand has 16 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) [2022-12-12 20:52:14,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:52:14,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:52:14,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:52:17,327 INFO L130 PetriNetUnfolder]: 1180/2338 cut-off events. [2022-12-12 20:52:17,327 INFO L131 PetriNetUnfolder]: For 6770/6770 co-relation queries the response was YES. [2022-12-12 20:52:17,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53314 conditions, 2338 events. 1180/2338 cut-off events. For 6770/6770 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14886 event pairs, 0 based on Foata normal form. 16/1927 useless extension candidates. Maximal degree in co-relation 38202. Up to 2269 conditions per place. [2022-12-12 20:52:17,346 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 970 selfloop transitions, 394 changer transitions 18/1382 dead transitions. [2022-12-12 20:52:17,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 1382 transitions, 63811 flow [2022-12-12 20:52:17,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-12 20:52:17,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-12 20:52:17,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 204 transitions. [2022-12-12 20:52:17,348 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2727272727272727 [2022-12-12 20:52:17,348 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 284 predicate places. [2022-12-12 20:52:17,348 INFO L82 GeneralOperation]: Start removeDead. Operand has 305 places, 1382 transitions, 63811 flow [2022-12-12 20:52:17,385 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 305 places, 1364 transitions, 62974 flow [2022-12-12 20:52:17,386 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 1364 transitions, 62974 flow [2022-12-12 20:52:17,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 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) [2022-12-12 20:52:17,386 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:52:17,386 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:52:17,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-12 20:52:17,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:52:17,592 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:52:17,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:52:17,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1964763892, now seen corresponding path program 15 times [2022-12-12 20:52:17,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:52:17,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685809729] [2022-12-12 20:52:17,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:52:17,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:52:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:52:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:17,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:52:17,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685809729] [2022-12-12 20:52:17,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685809729] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:52:17,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048987180] [2022-12-12 20:52:17,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 20:52:17,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:52:17,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:52:17,796 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:52:17,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-12 20:52:17,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 20:52:17,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:52:17,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:52:17,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:52:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:17,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:52:18,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:18,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048987180] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:52:18,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:52:18,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-12-12 20:52:18,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954431285] [2022-12-12 20:52:18,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:52:18,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 20:52:18,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:52:18,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 20:52:18,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-12-12 20:52:18,040 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:52:18,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 1364 transitions, 62974 flow. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:52:18,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:52:18,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:52:18,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:52:20,802 INFO L130 PetriNetUnfolder]: 1576/3054 cut-off events. [2022-12-12 20:52:20,802 INFO L131 PetriNetUnfolder]: For 6782/6782 co-relation queries the response was YES. [2022-12-12 20:52:20,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72845 conditions, 3054 events. 1576/3054 cut-off events. For 6782/6782 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20340 event pairs, 0 based on Foata normal form. 0/2509 useless extension candidates. Maximal degree in co-relation 55742. Up to 2985 conditions per place. [2022-12-12 20:52:20,827 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 1479 selfloop transitions, 342 changer transitions 0/1821 dead transitions. [2022-12-12 20:52:20,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 1821 transitions, 87671 flow [2022-12-12 20:52:20,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-12 20:52:20,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-12 20:52:20,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 165 transitions. [2022-12-12 20:52:20,829 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2696078431372549 [2022-12-12 20:52:20,830 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 319 predicate places. [2022-12-12 20:52:20,830 INFO L82 GeneralOperation]: Start removeDead. Operand has 340 places, 1821 transitions, 87671 flow [2022-12-12 20:52:20,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 340 places, 1821 transitions, 87671 flow [2022-12-12 20:52:20,875 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 1821 transitions, 87671 flow [2022-12-12 20:52:20,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:52:20,876 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:52:20,876 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:52:20,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-12 20:52:21,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:52:21,076 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:52:21,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:52:21,077 INFO L85 PathProgramCache]: Analyzing trace with hash -651518186, now seen corresponding path program 16 times [2022-12-12 20:52:21,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:52:21,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077245540] [2022-12-12 20:52:21,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:52:21,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:52:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:52:21,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:21,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:52:21,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077245540] [2022-12-12 20:52:21,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077245540] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:52:21,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070986626] [2022-12-12 20:52:21,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 20:52:21,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:52:21,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:52:21,345 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:52:21,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-12 20:52:21,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 20:52:21,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:52:21,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:52:21,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:52:21,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:21,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:52:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:21,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070986626] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:52:21,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:52:21,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-12-12 20:52:21,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132113697] [2022-12-12 20:52:21,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:52:21,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 20:52:21,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:52:21,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 20:52:21,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-12-12 20:52:21,690 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:52:21,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 1821 transitions, 87671 flow. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:52:21,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:52:21,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:52:21,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:52:27,969 INFO L130 PetriNetUnfolder]: 1906/3762 cut-off events. [2022-12-12 20:52:27,969 INFO L131 PetriNetUnfolder]: For 6809/6809 co-relation queries the response was YES. [2022-12-12 20:52:27,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93605 conditions, 3762 events. 1906/3762 cut-off events. For 6809/6809 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 26741 event pairs, 0 based on Foata normal form. 26/3107 useless extension candidates. Maximal degree in co-relation 74112. Up to 3689 conditions per place. [2022-12-12 20:52:28,005 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 1600 selfloop transitions, 655 changer transitions 40/2295 dead transitions. [2022-12-12 20:52:28,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 2295 transitions, 115128 flow [2022-12-12 20:52:28,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-12 20:52:28,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-12-12 20:52:28,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 239 transitions. [2022-12-12 20:52:28,007 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2703619909502262 [2022-12-12 20:52:28,008 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 370 predicate places. [2022-12-12 20:52:28,008 INFO L82 GeneralOperation]: Start removeDead. Operand has 391 places, 2295 transitions, 115128 flow [2022-12-12 20:52:28,072 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 388 places, 2255 transitions, 113113 flow [2022-12-12 20:52:28,072 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 2255 transitions, 113113 flow [2022-12-12 20:52:28,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:52:28,073 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:52:28,073 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:52:28,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-12 20:52:28,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-12 20:52:28,279 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:52:28,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:52:28,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1118041724, now seen corresponding path program 17 times [2022-12-12 20:52:28,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:52:28,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601199946] [2022-12-12 20:52:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:52:28,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:52:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:52:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:28,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:52:28,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601199946] [2022-12-12 20:52:28,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601199946] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:52:28,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618747910] [2022-12-12 20:52:28,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 20:52:28,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:52:28,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:52:28,557 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:52:28,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-12 20:52:28,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 20:52:28,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:52:28,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:52:28,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:52:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:28,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:52:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:28,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618747910] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:52:28,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:52:28,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-12 20:52:28,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111960828] [2022-12-12 20:52:28,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:52:28,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 20:52:28,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:52:28,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 20:52:28,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-12-12 20:52:28,849 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:52:28,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 2255 transitions, 113113 flow. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:52:28,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:52:28,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:52:28,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:52:34,623 INFO L130 PetriNetUnfolder]: 2019/4051 cut-off events. [2022-12-12 20:52:34,623 INFO L131 PetriNetUnfolder]: For 7374/7374 co-relation queries the response was YES. [2022-12-12 20:52:34,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104913 conditions, 4051 events. 2019/4051 cut-off events. For 7374/7374 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29602 event pairs, 0 based on Foata normal form. 0/3320 useless extension candidates. Maximal degree in co-relation 83752. Up to 3978 conditions per place. [2022-12-12 20:52:34,657 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 1927 selfloop transitions, 564 changer transitions 0/2491 dead transitions. [2022-12-12 20:52:34,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 2491 transitions, 130003 flow [2022-12-12 20:52:34,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-12 20:52:34,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-12 20:52:34,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 162 transitions. [2022-12-12 20:52:34,658 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.30740037950664134 [2022-12-12 20:52:34,659 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 397 predicate places. [2022-12-12 20:52:34,659 INFO L82 GeneralOperation]: Start removeDead. Operand has 418 places, 2491 transitions, 130003 flow [2022-12-12 20:52:34,726 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 418 places, 2491 transitions, 130003 flow [2022-12-12 20:52:34,726 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 2491 transitions, 130003 flow [2022-12-12 20:52:34,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:52:34,726 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:52:34,726 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:52:34,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-12 20:52:34,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-12 20:52:34,927 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:52:34,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:52:34,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1703636090, now seen corresponding path program 18 times [2022-12-12 20:52:34,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:52:34,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595695912] [2022-12-12 20:52:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:52:34,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:52:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:52:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:35,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:52:35,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595695912] [2022-12-12 20:52:35,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595695912] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:52:35,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427815454] [2022-12-12 20:52:35,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 20:52:35,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:52:35,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:52:35,088 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:52:35,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-12 20:52:35,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 20:52:35,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:52:35,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:52:35,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:52:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:35,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:52:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:35,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427815454] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:52:35,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:52:35,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-12-12 20:52:35,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793408675] [2022-12-12 20:52:35,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:52:35,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-12 20:52:35,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:52:35,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-12 20:52:35,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-12-12 20:52:35,331 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:52:35,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 2491 transitions, 130003 flow. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:52:35,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:52:35,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:52:35,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:52:41,003 INFO L130 PetriNetUnfolder]: 2823/5681 cut-off events. [2022-12-12 20:52:41,004 INFO L131 PetriNetUnfolder]: For 7777/7777 co-relation queries the response was YES. [2022-12-12 20:52:41,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153016 conditions, 5681 events. 2823/5681 cut-off events. For 7777/7777 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 44459 event pairs, 0 based on Foata normal form. 0/4638 useless extension candidates. Maximal degree in co-relation 126128. Up to 5604 conditions per place. [2022-12-12 20:52:41,053 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 3143 selfloop transitions, 394 changer transitions 0/3537 dead transitions. [2022-12-12 20:52:41,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 3537 transitions, 191634 flow [2022-12-12 20:52:41,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 20:52:41,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 20:52:41,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 84 transitions. [2022-12-12 20:52:41,055 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.35294117647058826 [2022-12-12 20:52:41,055 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 410 predicate places. [2022-12-12 20:52:41,055 INFO L82 GeneralOperation]: Start removeDead. Operand has 431 places, 3537 transitions, 191634 flow [2022-12-12 20:52:41,164 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 431 places, 3537 transitions, 191634 flow [2022-12-12 20:52:41,164 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 3537 transitions, 191634 flow [2022-12-12 20:52:41,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:52:41,164 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:52:41,164 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:52:41,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-12 20:52:41,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-12 20:52:41,365 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:52:41,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:52:41,366 INFO L85 PathProgramCache]: Analyzing trace with hash -2140061432, now seen corresponding path program 19 times [2022-12-12 20:52:41,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:52:41,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354822647] [2022-12-12 20:52:41,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:52:41,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:52:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:52:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:41,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:52:41,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354822647] [2022-12-12 20:52:41,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354822647] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:52:41,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674494476] [2022-12-12 20:52:41,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 20:52:41,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:52:41,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:52:41,540 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:52:41,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-12 20:52:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:52:41,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:52:41,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:52:41,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:41,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:52:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:41,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674494476] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:52:41,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:52:41,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-12-12 20:52:41,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545418355] [2022-12-12 20:52:41,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:52:41,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 20:52:41,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:52:41,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 20:52:41,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-12-12 20:52:41,807 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:52:41,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 3537 transitions, 191634 flow. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:52:41,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:52:41,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:52:41,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:52:56,529 INFO L130 PetriNetUnfolder]: 3377/6727 cut-off events. [2022-12-12 20:52:56,529 INFO L131 PetriNetUnfolder]: For 7807/7807 co-relation queries the response was YES. [2022-12-12 20:52:56,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187962 conditions, 6727 events. 3377/6727 cut-off events. For 7807/7807 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 53982 event pairs, 0 based on Foata normal form. 0/5508 useless extension candidates. Maximal degree in co-relation 159373. Up to 6646 conditions per place. [2022-12-12 20:52:56,585 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 2867 selfloop transitions, 1323 changer transitions 0/4190 dead transitions. [2022-12-12 20:52:56,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 4190 transitions, 235304 flow [2022-12-12 20:52:56,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-12 20:52:56,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-12-12 20:52:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 279 transitions. [2022-12-12 20:52:56,587 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2781655034895314 [2022-12-12 20:52:56,588 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 468 predicate places. [2022-12-12 20:52:56,588 INFO L82 GeneralOperation]: Start removeDead. Operand has 489 places, 4190 transitions, 235304 flow [2022-12-12 20:52:56,710 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 489 places, 4190 transitions, 235304 flow [2022-12-12 20:52:56,711 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 4190 transitions, 235304 flow [2022-12-12 20:52:56,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:52:56,711 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:52:56,711 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:52:56,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-12 20:52:56,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:52:56,912 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:52:56,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:52:56,912 INFO L85 PathProgramCache]: Analyzing trace with hash 73943466, now seen corresponding path program 20 times [2022-12-12 20:52:56,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:52:56,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182795514] [2022-12-12 20:52:56,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:52:56,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:52:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:52:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:57,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:52:57,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182795514] [2022-12-12 20:52:57,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182795514] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:52:57,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822634018] [2022-12-12 20:52:57,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:52:57,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:52:57,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:52:57,090 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:52:57,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-12 20:52:57,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:52:57,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:52:57,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:52:57,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:52:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:57,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:52:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:52:57,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822634018] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:52:57,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:52:57,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-12 20:52:57,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245996097] [2022-12-12 20:52:57,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:52:57,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 20:52:57,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:52:57,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 20:52:57,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-12-12 20:52:57,347 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:52:57,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 4190 transitions, 235304 flow. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:52:57,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:52:57,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:52:57,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:53:04,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-12 20:53:19,683 INFO L130 PetriNetUnfolder]: 3939/7891 cut-off events. [2022-12-12 20:53:19,684 INFO L131 PetriNetUnfolder]: For 7870/7870 co-relation queries the response was YES. [2022-12-12 20:53:19,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228491 conditions, 7891 events. 3939/7891 cut-off events. For 7870/7870 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 65266 event pairs, 0 based on Foata normal form. 22/6442 useless extension candidates. Maximal degree in co-relation 196615. Up to 7806 conditions per place. [2022-12-12 20:53:19,761 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 3446 selfloop transitions, 1441 changer transitions 62/4949 dead transitions. [2022-12-12 20:53:19,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 4949 transitions, 287941 flow [2022-12-12 20:53:19,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-12 20:53:19,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-12-12 20:53:19,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 260 transitions. [2022-12-12 20:53:19,762 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.31212484993997597 [2022-12-12 20:53:19,763 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 515 predicate places. [2022-12-12 20:53:19,763 INFO L82 GeneralOperation]: Start removeDead. Operand has 536 places, 4949 transitions, 287941 flow [2022-12-12 20:53:20,014 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 530 places, 4887 transitions, 284357 flow [2022-12-12 20:53:20,015 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 4887 transitions, 284357 flow [2022-12-12 20:53:20,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:53:20,015 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:53:20,015 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:53:20,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-12 20:53:20,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-12 20:53:20,216 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:53:20,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:53:20,216 INFO L85 PathProgramCache]: Analyzing trace with hash -306897312, now seen corresponding path program 21 times [2022-12-12 20:53:20,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:53:20,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813183213] [2022-12-12 20:53:20,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:53:20,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:53:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:53:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:53:20,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:53:20,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813183213] [2022-12-12 20:53:20,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813183213] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:53:20,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398990156] [2022-12-12 20:53:20,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 20:53:20,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:53:20,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:53:20,398 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:53:20,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-12 20:53:20,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 20:53:20,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:53:20,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:53:20,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:53:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:53:20,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:53:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:53:20,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398990156] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:53:20,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:53:20,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-12-12 20:53:20,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186232480] [2022-12-12 20:53:20,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:53:20,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 20:53:20,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:53:20,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 20:53:20,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-12-12 20:53:20,690 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:53:20,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 4887 transitions, 284357 flow. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:53:20,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:53:20,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:53:20,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:53:42,220 INFO L130 PetriNetUnfolder]: 4198/8612 cut-off events. [2022-12-12 20:53:42,220 INFO L131 PetriNetUnfolder]: For 7792/7792 co-relation queries the response was YES. [2022-12-12 20:53:42,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258151 conditions, 8612 events. 4198/8612 cut-off events. For 7792/7792 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 74033 event pairs, 0 based on Foata normal form. 0/7001 useless extension candidates. Maximal degree in co-relation 223391. Up to 8531 conditions per place. [2022-12-12 20:53:42,294 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 4376 selfloop transitions, 1084 changer transitions 0/5460 dead transitions. [2022-12-12 20:53:42,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 5460 transitions, 328823 flow [2022-12-12 20:53:42,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-12 20:53:42,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-12 20:53:42,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 200 transitions. [2022-12-12 20:53:42,296 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3460207612456747 [2022-12-12 20:53:42,296 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 542 predicate places. [2022-12-12 20:53:42,296 INFO L82 GeneralOperation]: Start removeDead. Operand has 563 places, 5460 transitions, 328823 flow [2022-12-12 20:53:42,469 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 563 places, 5460 transitions, 328823 flow [2022-12-12 20:53:42,470 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 5460 transitions, 328823 flow [2022-12-12 20:53:42,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:53:42,470 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:53:42,470 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:53:42,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-12 20:53:42,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-12 20:53:42,676 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:53:42,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:53:42,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1239302240, now seen corresponding path program 22 times [2022-12-12 20:53:42,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:53:42,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864624660] [2022-12-12 20:53:42,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:53:42,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:53:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:53:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:53:42,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:53:42,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864624660] [2022-12-12 20:53:42,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864624660] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:53:42,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560003719] [2022-12-12 20:53:42,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 20:53:42,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:53:42,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:53:42,848 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:53:42,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-12 20:53:42,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 20:53:42,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:53:42,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:53:42,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:53:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:53:43,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:53:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:53:43,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560003719] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:53:43,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:53:43,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-12 20:53:43,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379301027] [2022-12-12 20:53:43,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:53:43,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 20:53:43,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:53:43,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 20:53:43,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-12-12 20:53:43,104 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:53:43,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 5460 transitions, 328823 flow. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:53:43,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:53:43,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:53:43,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:54:08,639 INFO L130 PetriNetUnfolder]: 4389/8963 cut-off events. [2022-12-12 20:54:08,639 INFO L131 PetriNetUnfolder]: For 7767/7767 co-relation queries the response was YES. [2022-12-12 20:54:08,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277638 conditions, 8963 events. 4389/8963 cut-off events. For 7767/7767 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 77303 event pairs, 0 based on Foata normal form. 0/7306 useless extension candidates. Maximal degree in co-relation 241901. Up to 8882 conditions per place. [2022-12-12 20:54:08,721 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 4946 selfloop transitions, 727 changer transitions 0/5673 dead transitions. [2022-12-12 20:54:08,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 594 places, 5673 transitions, 352928 flow [2022-12-12 20:54:08,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-12 20:54:08,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-12 20:54:08,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 150 transitions. [2022-12-12 20:54:08,722 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2757352941176471 [2022-12-12 20:54:08,723 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 573 predicate places. [2022-12-12 20:54:08,723 INFO L82 GeneralOperation]: Start removeDead. Operand has 594 places, 5673 transitions, 352928 flow [2022-12-12 20:54:08,906 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 594 places, 5673 transitions, 352928 flow [2022-12-12 20:54:08,906 INFO L495 AbstractCegarLoop]: Abstraction has has 594 places, 5673 transitions, 352928 flow [2022-12-12 20:54:08,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:54:08,907 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:54:08,907 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:54:08,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-12 20:54:09,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:54:09,113 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:54:09,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:54:09,113 INFO L85 PathProgramCache]: Analyzing trace with hash -615813547, now seen corresponding path program 23 times [2022-12-12 20:54:09,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:54:09,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260466119] [2022-12-12 20:54:09,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:54:09,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:54:09,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:54:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 20:54:09,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:54:09,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260466119] [2022-12-12 20:54:09,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260466119] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:54:09,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578479428] [2022-12-12 20:54:09,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 20:54:09,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:54:09,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:54:09,961 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:54:09,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-12 20:54:10,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 20:54:10,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:54:10,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-12 20:54:10,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:54:10,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 20:54:10,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 20:54:10,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 20:54:10,494 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-12-12 20:54:10,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 31 [2022-12-12 20:54:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:54:10,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:54:10,632 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:54:10,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 118 [2022-12-12 20:54:10,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 20:54:10,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 52 [2022-12-12 20:54:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-12 20:54:10,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578479428] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:54:10,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:54:10,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 22 [2022-12-12 20:54:10,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913767419] [2022-12-12 20:54:10,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:54:10,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 20:54:10,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:54:10,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 20:54:10,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=465, Unknown=1, NotChecked=0, Total=552 [2022-12-12 20:54:10,862 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 17 [2022-12-12 20:54:10,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 5673 transitions, 352928 flow. Second operand has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 24 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:54:10,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:54:10,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 17 [2022-12-12 20:54:10,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:54:41,543 INFO L130 PetriNetUnfolder]: 4510/9201 cut-off events. [2022-12-12 20:54:41,543 INFO L131 PetriNetUnfolder]: For 12372/12372 co-relation queries the response was YES. [2022-12-12 20:54:41,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293836 conditions, 9201 events. 4510/9201 cut-off events. For 12372/12372 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 79326 event pairs, 0 based on Foata normal form. 6/7523 useless extension candidates. Maximal degree in co-relation 249675. Up to 9089 conditions per place. [2022-12-12 20:54:41,633 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 5538 selfloop transitions, 203 changer transitions 51/5810 dead transitions. [2022-12-12 20:54:41,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 5810 transitions, 373072 flow [2022-12-12 20:54:41,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 20:54:41,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 20:54:41,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 116 transitions. [2022-12-12 20:54:41,635 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4013840830449827 [2022-12-12 20:54:41,635 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 589 predicate places. [2022-12-12 20:54:41,635 INFO L82 GeneralOperation]: Start removeDead. Operand has 610 places, 5810 transitions, 373072 flow [2022-12-12 20:54:41,952 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 604 places, 5759 transitions, 369763 flow [2022-12-12 20:54:41,952 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 5759 transitions, 369763 flow [2022-12-12 20:54:41,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 24 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:54:41,952 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:54:41,952 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:54:41,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-12 20:54:42,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:54:42,153 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:54:42,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:54:42,153 INFO L85 PathProgramCache]: Analyzing trace with hash 127876735, now seen corresponding path program 24 times [2022-12-12 20:54:42,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:54:42,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759301353] [2022-12-12 20:54:42,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:54:42,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:54:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:54:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:54:42,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:54:42,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759301353] [2022-12-12 20:54:42,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759301353] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:54:42,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922706847] [2022-12-12 20:54:42,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 20:54:42,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:54:42,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:54:42,316 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:54:42,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-12 20:54:42,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-12 20:54:42,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:54:42,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:54:42,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:54:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:54:42,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:54:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:54:42,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922706847] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:54:42,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:54:42,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-12-12 20:54:42,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118242840] [2022-12-12 20:54:42,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:54:42,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 20:54:42,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:54:42,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 20:54:42,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-12-12 20:54:42,653 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:54:42,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 5759 transitions, 369763 flow. Second operand has 17 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) [2022-12-12 20:54:42,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:54:42,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:54:42,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:55:14,904 INFO L130 PetriNetUnfolder]: 4602/9373 cut-off events. [2022-12-12 20:55:14,904 INFO L131 PetriNetUnfolder]: For 12398/12398 co-relation queries the response was YES. [2022-12-12 20:55:14,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308724 conditions, 9373 events. 4602/9373 cut-off events. For 12398/12398 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 81045 event pairs, 0 based on Foata normal form. 0/7675 useless extension candidates. Maximal degree in co-relation 267107. Up to 9261 conditions per place. [2022-12-12 20:55:15,113 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 4783 selfloop transitions, 1102 changer transitions 4/5889 dead transitions. [2022-12-12 20:55:15,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 5889 transitions, 389936 flow [2022-12-12 20:55:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-12 20:55:15,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-12 20:55:15,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 128 transitions. [2022-12-12 20:55:15,115 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3137254901960784 [2022-12-12 20:55:15,116 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 606 predicate places. [2022-12-12 20:55:15,116 INFO L82 GeneralOperation]: Start removeDead. Operand has 627 places, 5889 transitions, 389936 flow [2022-12-12 20:55:15,456 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 627 places, 5885 transitions, 389672 flow [2022-12-12 20:55:15,457 INFO L495 AbstractCegarLoop]: Abstraction has has 627 places, 5885 transitions, 389672 flow [2022-12-12 20:55:15,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 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) [2022-12-12 20:55:15,457 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:55:15,457 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:55:15,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-12 20:55:15,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:55:15,663 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:55:15,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:55:15,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1377800875, now seen corresponding path program 25 times [2022-12-12 20:55:15,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:55:15,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159087178] [2022-12-12 20:55:15,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:55:15,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:55:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:55:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:55:15,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:55:15,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159087178] [2022-12-12 20:55:15,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159087178] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:55:15,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186273370] [2022-12-12 20:55:15,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 20:55:15,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:55:15,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:55:15,828 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:55:15,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-12 20:55:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:55:15,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:55:15,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:55:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:55:15,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:55:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:55:16,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186273370] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:55:16,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:55:16,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-12 20:55:16,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108367580] [2022-12-12 20:55:16,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:55:16,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 20:55:16,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:55:16,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 20:55:16,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-12-12 20:55:16,097 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:55:16,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 627 places, 5885 transitions, 389672 flow. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:55:16,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:55:16,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:55:16,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:55:46,757 INFO L130 PetriNetUnfolder]: 4776/9755 cut-off events. [2022-12-12 20:55:46,757 INFO L131 PetriNetUnfolder]: For 12455/12455 co-relation queries the response was YES. [2022-12-12 20:55:46,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331133 conditions, 9755 events. 4776/9755 cut-off events. For 12455/12455 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 85149 event pairs, 0 based on Foata normal form. 16/7995 useless extension candidates. Maximal degree in co-relation 287883. Up to 9643 conditions per place. [2022-12-12 20:55:46,857 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 5347 selfloop transitions, 756 changer transitions 16/6119 dead transitions. [2022-12-12 20:55:46,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 6119 transitions, 417495 flow [2022-12-12 20:55:46,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-12 20:55:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-12 20:55:46,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 129 transitions. [2022-12-12 20:55:46,863 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.329923273657289 [2022-12-12 20:55:46,863 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 626 predicate places. [2022-12-12 20:55:46,863 INFO L82 GeneralOperation]: Start removeDead. Operand has 647 places, 6119 transitions, 417495 flow [2022-12-12 20:55:47,202 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 647 places, 6103 transitions, 416395 flow [2022-12-12 20:55:47,203 INFO L495 AbstractCegarLoop]: Abstraction has has 647 places, 6103 transitions, 416395 flow [2022-12-12 20:55:47,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:55:47,203 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:55:47,203 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:55:47,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-12 20:55:47,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:55:47,404 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:55:47,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:55:47,404 INFO L85 PathProgramCache]: Analyzing trace with hash -287477589, now seen corresponding path program 26 times [2022-12-12 20:55:47,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:55:47,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859298223] [2022-12-12 20:55:47,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:55:47,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:55:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:55:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:55:47,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:55:47,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859298223] [2022-12-12 20:55:47,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859298223] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:55:47,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603289538] [2022-12-12 20:55:47,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 20:55:47,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:55:47,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:55:47,549 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:55:47,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-12 20:55:47,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 20:55:47,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:55:47,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:55:47,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:55:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:55:47,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:55:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:55:47,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603289538] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:55:47,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:55:47,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-12-12 20:55:47,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345033598] [2022-12-12 20:55:47,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:55:47,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 20:55:47,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:55:47,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 20:55:47,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-12-12 20:55:47,799 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:55:47,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 6103 transitions, 416395 flow. Second operand has 17 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) [2022-12-12 20:55:47,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:55:47,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:55:47,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:56:24,713 INFO L130 PetriNetUnfolder]: 4971/10104 cut-off events. [2022-12-12 20:56:24,714 INFO L131 PetriNetUnfolder]: For 12497/12497 co-relation queries the response was YES. [2022-12-12 20:56:24,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353132 conditions, 10104 events. 4971/10104 cut-off events. For 12497/12497 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 88421 event pairs, 0 based on Foata normal form. 0/8272 useless extension candidates. Maximal degree in co-relation 308661. Up to 9992 conditions per place. [2022-12-12 20:56:24,816 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 5708 selfloop transitions, 594 changer transitions 0/6302 dead transitions. [2022-12-12 20:56:24,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 670 places, 6302 transitions, 442627 flow [2022-12-12 20:56:24,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-12 20:56:24,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-12 20:56:24,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 143 transitions. [2022-12-12 20:56:24,818 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.35049019607843135 [2022-12-12 20:56:24,818 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 649 predicate places. [2022-12-12 20:56:24,818 INFO L82 GeneralOperation]: Start removeDead. Operand has 670 places, 6302 transitions, 442627 flow [2022-12-12 20:56:25,176 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 670 places, 6302 transitions, 442627 flow [2022-12-12 20:56:25,176 INFO L495 AbstractCegarLoop]: Abstraction has has 670 places, 6302 transitions, 442627 flow [2022-12-12 20:56:25,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 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) [2022-12-12 20:56:25,176 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:56:25,177 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:56:25,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-12 20:56:25,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-12 20:56:25,377 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:56:25,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:56:25,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1470743551, now seen corresponding path program 27 times [2022-12-12 20:56:25,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:56:25,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183136567] [2022-12-12 20:56:25,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:56:25,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:56:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:56:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:56:25,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:56:25,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183136567] [2022-12-12 20:56:25,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183136567] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:56:25,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642224369] [2022-12-12 20:56:25,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 20:56:25,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:56:25,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:56:25,524 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:56:25,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-12 20:56:25,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 20:56:25,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:56:25,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:56:25,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:56:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:56:25,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:56:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:56:25,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642224369] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:56:25,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:56:25,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-12-12 20:56:25,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435274731] [2022-12-12 20:56:25,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:56:25,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 20:56:25,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:56:25,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 20:56:25,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-12-12 20:56:25,812 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:56:25,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 670 places, 6302 transitions, 442627 flow. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:56:25,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:56:25,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:56:25,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:57:07,269 INFO L130 PetriNetUnfolder]: 5162/10521 cut-off events. [2022-12-12 20:57:07,269 INFO L131 PetriNetUnfolder]: For 12551/12551 co-relation queries the response was YES. [2022-12-12 20:57:07,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378295 conditions, 10521 events. 5162/10521 cut-off events. For 12551/12551 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 93094 event pairs, 0 based on Foata normal form. 4/8607 useless extension candidates. Maximal degree in co-relation 331442. Up to 10409 conditions per place. [2022-12-12 20:57:07,372 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 6175 selfloop transitions, 383 changer transitions 4/6562 dead transitions. [2022-12-12 20:57:07,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 6562 transitions, 474089 flow [2022-12-12 20:57:07,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 20:57:07,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 20:57:07,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 118 transitions. [2022-12-12 20:57:07,373 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.33053221288515405 [2022-12-12 20:57:07,373 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 668 predicate places. [2022-12-12 20:57:07,373 INFO L82 GeneralOperation]: Start removeDead. Operand has 689 places, 6562 transitions, 474089 flow [2022-12-12 20:57:07,610 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 689 places, 6558 transitions, 473798 flow [2022-12-12 20:57:07,610 INFO L495 AbstractCegarLoop]: Abstraction has has 689 places, 6558 transitions, 473798 flow [2022-12-12 20:57:07,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:57:07,610 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:57:07,610 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:57:07,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-12 20:57:07,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:57:07,811 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:57:07,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:57:07,812 INFO L85 PathProgramCache]: Analyzing trace with hash 134044463, now seen corresponding path program 28 times [2022-12-12 20:57:07,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:57:07,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226381314] [2022-12-12 20:57:07,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:57:07,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:57:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:57:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:57:07,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:57:07,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226381314] [2022-12-12 20:57:07,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226381314] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:57:07,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239656113] [2022-12-12 20:57:07,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 20:57:07,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:57:07,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:57:07,963 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:57:07,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-12 20:57:08,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 20:57:08,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:57:08,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:57:08,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:57:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:57:08,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:57:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:57:08,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239656113] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:57:08,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:57:08,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-12-12 20:57:08,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656656542] [2022-12-12 20:57:08,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:57:08,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-12 20:57:08,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:57:08,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-12 20:57:08,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-12-12 20:57:08,253 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:57:08,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 689 places, 6558 transitions, 473798 flow. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:57:08,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:57:08,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:57:08,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:57:51,170 INFO L130 PetriNetUnfolder]: 5201/10558 cut-off events. [2022-12-12 20:57:51,171 INFO L131 PetriNetUnfolder]: For 12561/12561 co-relation queries the response was YES. [2022-12-12 20:57:51,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390182 conditions, 10558 events. 5201/10558 cut-off events. For 12561/12561 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 93094 event pairs, 0 based on Foata normal form. 0/8650 useless extension candidates. Maximal degree in co-relation 342462. Up to 10446 conditions per place. [2022-12-12 20:57:51,284 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 6275 selfloop transitions, 296 changer transitions 0/6571 dead transitions. [2022-12-12 20:57:51,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 711 places, 6571 transitions, 487867 flow [2022-12-12 20:57:51,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-12 20:57:51,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-12 20:57:51,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 123 transitions. [2022-12-12 20:57:51,285 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3145780051150895 [2022-12-12 20:57:51,286 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 690 predicate places. [2022-12-12 20:57:51,286 INFO L82 GeneralOperation]: Start removeDead. Operand has 711 places, 6571 transitions, 487867 flow [2022-12-12 20:57:51,541 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 711 places, 6571 transitions, 487867 flow [2022-12-12 20:57:51,541 INFO L495 AbstractCegarLoop]: Abstraction has has 711 places, 6571 transitions, 487867 flow [2022-12-12 20:57:51,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:57:51,541 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:57:51,542 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:57:51,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-12-12 20:57:51,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:57:51,742 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:57:51,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:57:51,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1176575467, now seen corresponding path program 29 times [2022-12-12 20:57:51,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:57:51,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254136780] [2022-12-12 20:57:51,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:57:51,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:57:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:57:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:57:51,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:57:51,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254136780] [2022-12-12 20:57:51,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254136780] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:57:51,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950717871] [2022-12-12 20:57:51,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 20:57:51,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:57:51,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:57:51,891 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:57:51,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-12 20:57:51,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 20:57:51,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:57:51,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:57:51,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:57:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:57:52,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:57:52,185 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:57:52,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950717871] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:57:52,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:57:52,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-12 20:57:52,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282274163] [2022-12-12 20:57:52,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:57:52,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 20:57:52,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:57:52,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 20:57:52,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-12-12 20:57:52,187 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:57:52,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 711 places, 6571 transitions, 487867 flow. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:57:52,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:57:52,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:57:52,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:58:41,869 INFO L130 PetriNetUnfolder]: 5542/11327 cut-off events. [2022-12-12 20:58:41,870 INFO L131 PetriNetUnfolder]: For 12694/12694 co-relation queries the response was YES. [2022-12-12 20:58:41,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430052 conditions, 11327 events. 5542/11327 cut-off events. For 12694/12694 co-relation queries the response was YES. Maximal size of possible extension queue 814. Compared 101728 event pairs, 0 based on Foata normal form. 6/9253 useless extension candidates. Maximal degree in co-relation 371979. Up to 11215 conditions per place. [2022-12-12 20:58:42,087 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 6171 selfloop transitions, 961 changer transitions 28/7160 dead transitions. [2022-12-12 20:58:42,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 731 places, 7160 transitions, 546018 flow [2022-12-12 20:58:42,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 20:58:42,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 20:58:42,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 110 transitions. [2022-12-12 20:58:42,089 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3081232492997199 [2022-12-12 20:58:42,090 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 710 predicate places. [2022-12-12 20:58:42,090 INFO L82 GeneralOperation]: Start removeDead. Operand has 731 places, 7160 transitions, 546018 flow [2022-12-12 20:58:42,396 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 730 places, 7132 transitions, 543890 flow [2022-12-12 20:58:42,396 INFO L495 AbstractCegarLoop]: Abstraction has has 730 places, 7132 transitions, 543890 flow [2022-12-12 20:58:42,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:58:42,396 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:58:42,397 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:58:42,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-12 20:58:42,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-12 20:58:42,597 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:58:42,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:58:42,598 INFO L85 PathProgramCache]: Analyzing trace with hash 884284335, now seen corresponding path program 30 times [2022-12-12 20:58:42,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:58:42,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828495851] [2022-12-12 20:58:42,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:58:42,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:58:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:58:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:58:42,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:58:42,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828495851] [2022-12-12 20:58:42,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828495851] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:58:42,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571224225] [2022-12-12 20:58:42,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 20:58:42,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:58:42,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:58:42,740 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:58:42,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-12 20:58:42,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 20:58:42,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 20:58:42,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:58:42,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:58:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:58:42,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:58:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 20:58:43,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571224225] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:58:43,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:58:43,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-12 20:58:43,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031732174] [2022-12-12 20:58:43,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:58:43,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 20:58:43,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:58:43,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 20:58:43,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-12-12 20:58:43,060 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:58:43,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 730 places, 7132 transitions, 543890 flow. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:58:43,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:58:43,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:58:43,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 20:59:37,023 INFO L130 PetriNetUnfolder]: 5539/11288 cut-off events. [2022-12-12 20:59:37,024 INFO L131 PetriNetUnfolder]: For 12710/12710 co-relation queries the response was YES. [2022-12-12 20:59:37,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439865 conditions, 11288 events. 5539/11288 cut-off events. For 12710/12710 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 101128 event pairs, 0 based on Foata normal form. 4/9254 useless extension candidates. Maximal degree in co-relation 381146. Up to 11176 conditions per place. [2022-12-12 20:59:37,145 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 6421 selfloop transitions, 714 changer transitions 8/7143 dead transitions. [2022-12-12 20:59:37,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 748 places, 7143 transitions, 559030 flow [2022-12-12 20:59:37,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-12 20:59:37,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-12 20:59:37,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 91 transitions. [2022-12-12 20:59:37,146 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.28173374613003094 [2022-12-12 20:59:37,146 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 727 predicate places. [2022-12-12 20:59:37,146 INFO L82 GeneralOperation]: Start removeDead. Operand has 748 places, 7143 transitions, 559030 flow [2022-12-12 20:59:37,510 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 746 places, 7135 transitions, 558406 flow [2022-12-12 20:59:37,510 INFO L495 AbstractCegarLoop]: Abstraction has has 746 places, 7135 transitions, 558406 flow [2022-12-12 20:59:37,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:59:37,511 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 20:59:37,511 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 20:59:37,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-12 20:59:37,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-12 20:59:37,711 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 20:59:37,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 20:59:37,712 INFO L85 PathProgramCache]: Analyzing trace with hash 766874577, now seen corresponding path program 31 times [2022-12-12 20:59:37,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 20:59:37,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219694840] [2022-12-12 20:59:37,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 20:59:37,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 20:59:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:59:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:59:37,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 20:59:37,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219694840] [2022-12-12 20:59:37,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219694840] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 20:59:37,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951444953] [2022-12-12 20:59:37,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 20:59:37,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 20:59:37,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 20:59:37,863 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 20:59:37,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-12 20:59:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 20:59:37,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 20:59:37,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 20:59:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:59:38,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 20:59:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 20:59:38,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951444953] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 20:59:38,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 20:59:38,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-12-12 20:59:38,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758598879] [2022-12-12 20:59:38,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 20:59:38,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 20:59:38,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 20:59:38,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 20:59:38,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-12-12 20:59:38,142 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 20:59:38,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 746 places, 7135 transitions, 558406 flow. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 20:59:38,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 20:59:38,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 20:59:38,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:00:34,394 INFO L130 PetriNetUnfolder]: 5664/11535 cut-off events. [2022-12-12 21:00:34,395 INFO L131 PetriNetUnfolder]: For 13198/13198 co-relation queries the response was YES. [2022-12-12 21:00:34,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461060 conditions, 11535 events. 5664/11535 cut-off events. For 13198/13198 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 103751 event pairs, 0 based on Foata normal form. 0/9455 useless extension candidates. Maximal degree in co-relation 400055. Up to 11423 conditions per place. [2022-12-12 21:00:34,536 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 6384 selfloop transitions, 911 changer transitions 0/7295 dead transitions. [2022-12-12 21:00:34,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 774 places, 7295 transitions, 585554 flow [2022-12-12 21:00:34,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-12 21:00:34,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-12 21:00:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 171 transitions. [2022-12-12 21:00:34,537 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.34685598377281945 [2022-12-12 21:00:34,538 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 753 predicate places. [2022-12-12 21:00:34,538 INFO L82 GeneralOperation]: Start removeDead. Operand has 774 places, 7295 transitions, 585554 flow [2022-12-12 21:00:34,884 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 774 places, 7295 transitions, 585554 flow [2022-12-12 21:00:34,884 INFO L495 AbstractCegarLoop]: Abstraction has has 774 places, 7295 transitions, 585554 flow [2022-12-12 21:00:34,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:00:34,885 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:00:34,885 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:00:34,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-12-12 21:00:35,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-12 21:00:35,085 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:00:35,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:00:35,086 INFO L85 PathProgramCache]: Analyzing trace with hash 315909483, now seen corresponding path program 32 times [2022-12-12 21:00:35,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:00:35,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309277610] [2022-12-12 21:00:35,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:00:35,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:00:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:00:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 21:00:35,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:00:35,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309277610] [2022-12-12 21:00:35,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309277610] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:00:35,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486176186] [2022-12-12 21:00:35,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 21:00:35,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:00:35,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:00:35,312 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:00:35,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-12 21:00:35,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 21:00:35,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:00:35,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 21:00:35,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:00:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 21:00:35,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:00:35,677 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 21:00:35,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486176186] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:00:35,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:00:35,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-12-12 21:00:35,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69140640] [2022-12-12 21:00:35,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:00:35,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-12 21:00:35,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:00:35,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-12 21:00:35,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-12-12 21:00:35,679 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 21:00:35,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 774 places, 7295 transitions, 585554 flow. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:00:35,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:00:35,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 21:00:35,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:01:32,021 INFO L130 PetriNetUnfolder]: 5783/11736 cut-off events. [2022-12-12 21:01:32,022 INFO L131 PetriNetUnfolder]: For 13194/13194 co-relation queries the response was YES. [2022-12-12 21:01:32,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480849 conditions, 11736 events. 5783/11736 cut-off events. For 13194/13194 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 105499 event pairs, 0 based on Foata normal form. 0/9654 useless extension candidates. Maximal degree in co-relation 418721. Up to 11624 conditions per place. [2022-12-12 21:01:32,144 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 7154 selfloop transitions, 250 changer transitions 0/7404 dead transitions. [2022-12-12 21:01:32,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 800 places, 7404 transitions, 609118 flow [2022-12-12 21:01:32,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-12 21:01:32,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-12 21:01:32,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 145 transitions. [2022-12-12 21:01:32,146 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3159041394335512 [2022-12-12 21:01:32,146 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 779 predicate places. [2022-12-12 21:01:32,146 INFO L82 GeneralOperation]: Start removeDead. Operand has 800 places, 7404 transitions, 609118 flow [2022-12-12 21:01:32,619 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 800 places, 7404 transitions, 609118 flow [2022-12-12 21:01:32,619 INFO L495 AbstractCegarLoop]: Abstraction has has 800 places, 7404 transitions, 609118 flow [2022-12-12 21:01:32,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:01:32,619 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:01:32,619 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:01:32,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-12-12 21:01:32,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-12 21:01:32,820 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:01:32,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:01:32,820 INFO L85 PathProgramCache]: Analyzing trace with hash 145398051, now seen corresponding path program 33 times [2022-12-12 21:01:32,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:01:32,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208348273] [2022-12-12 21:01:32,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:01:32,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:01:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:01:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 21:01:32,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:01:32,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208348273] [2022-12-12 21:01:32,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208348273] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:01:32,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126876961] [2022-12-12 21:01:32,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 21:01:32,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:01:32,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:01:32,996 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:01:32,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-12 21:01:33,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 21:01:33,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:01:33,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 21:01:33,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:01:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 21:01:33,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:01:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 21:01:33,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126876961] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:01:33,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:01:33,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-12-12 21:01:33,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376240021] [2022-12-12 21:01:33,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:01:33,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 21:01:33,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:01:33,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 21:01:33,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-12-12 21:01:33,336 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 21:01:33,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 800 places, 7404 transitions, 609118 flow. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:01:33,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:01:33,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 21:01:33,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:02:38,514 INFO L130 PetriNetUnfolder]: 6045/12300 cut-off events. [2022-12-12 21:02:38,514 INFO L131 PetriNetUnfolder]: For 13309/13309 co-relation queries the response was YES. [2022-12-12 21:02:38,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516341 conditions, 12300 events. 6045/12300 cut-off events. For 13309/13309 co-relation queries the response was YES. Maximal size of possible extension queue 884. Compared 111704 event pairs, 0 based on Foata normal form. 0/10120 useless extension candidates. Maximal degree in co-relation 451240. Up to 12188 conditions per place. [2022-12-12 21:02:38,646 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 6828 selfloop transitions, 926 changer transitions 0/7754 dead transitions. [2022-12-12 21:02:38,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 823 places, 7754 transitions, 653527 flow [2022-12-12 21:02:38,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-12 21:02:38,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-12 21:02:38,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 133 transitions. [2022-12-12 21:02:38,647 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.32598039215686275 [2022-12-12 21:02:38,648 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 802 predicate places. [2022-12-12 21:02:38,648 INFO L82 GeneralOperation]: Start removeDead. Operand has 823 places, 7754 transitions, 653527 flow [2022-12-12 21:02:39,010 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 823 places, 7754 transitions, 653527 flow [2022-12-12 21:02:39,010 INFO L495 AbstractCegarLoop]: Abstraction has has 823 places, 7754 transitions, 653527 flow [2022-12-12 21:02:39,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:02:39,010 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:02:39,010 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:02:39,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-12-12 21:02:39,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:02:39,211 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:02:39,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:02:39,211 INFO L85 PathProgramCache]: Analyzing trace with hash -613869669, now seen corresponding path program 34 times [2022-12-12 21:02:39,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:02:39,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258434043] [2022-12-12 21:02:39,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:02:39,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:02:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:02:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 21:02:39,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:02:39,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258434043] [2022-12-12 21:02:39,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258434043] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:02:39,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740485919] [2022-12-12 21:02:39,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 21:02:39,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:02:39,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:02:39,347 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:02:39,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-12 21:02:39,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 21:02:39,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:02:39,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 21:02:39,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:02:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 21:02:39,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:02:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 21:02:39,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740485919] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:02:39,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:02:39,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-12 21:02:39,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304051013] [2022-12-12 21:02:39,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:02:39,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 21:02:39,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:02:39,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 21:02:39,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-12-12 21:02:39,636 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 21:02:39,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 823 places, 7754 transitions, 653527 flow. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:02:39,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:02:39,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 21:02:39,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:03:50,026 INFO L130 PetriNetUnfolder]: 6161/12594 cut-off events. [2022-12-12 21:03:50,026 INFO L131 PetriNetUnfolder]: For 13380/13380 co-relation queries the response was YES. [2022-12-12 21:03:50,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 541329 conditions, 12594 events. 6161/12594 cut-off events. For 13380/13380 co-relation queries the response was YES. Maximal size of possible extension queue 899. Compared 115293 event pairs, 0 based on Foata normal form. 10/10354 useless extension candidates. Maximal degree in co-relation 473361. Up to 12482 conditions per place. [2022-12-12 21:03:50,249 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 6831 selfloop transitions, 1102 changer transitions 10/7943 dead transitions. [2022-12-12 21:03:50,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 845 places, 7943 transitions, 685424 flow [2022-12-12 21:03:50,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-12 21:03:50,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-12 21:03:50,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 115 transitions. [2022-12-12 21:03:50,250 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.29411764705882354 [2022-12-12 21:03:50,251 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 824 predicate places. [2022-12-12 21:03:50,251 INFO L82 GeneralOperation]: Start removeDead. Operand has 845 places, 7943 transitions, 685424 flow [2022-12-12 21:03:50,577 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 842 places, 7933 transitions, 684564 flow [2022-12-12 21:03:50,578 INFO L495 AbstractCegarLoop]: Abstraction has has 842 places, 7933 transitions, 684564 flow [2022-12-12 21:03:50,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:03:50,578 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:03:50,578 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:03:50,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-12-12 21:03:50,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-12-12 21:03:50,779 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:03:50,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:03:50,779 INFO L85 PathProgramCache]: Analyzing trace with hash -616495445, now seen corresponding path program 35 times [2022-12-12 21:03:50,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:03:50,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465328353] [2022-12-12 21:03:50,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:03:50,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:03:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:03:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 21:03:50,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:03:50,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465328353] [2022-12-12 21:03:50,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465328353] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:03:50,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607589361] [2022-12-12 21:03:50,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 21:03:50,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:03:50,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:03:50,951 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:03:50,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-12 21:03:51,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 21:03:51,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:03:51,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 21:03:51,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:03:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 21:03:51,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:03:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 21:03:51,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607589361] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:03:51,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:03:51,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-12-12 21:03:51,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003199200] [2022-12-12 21:03:51,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:03:51,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 21:03:51,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:03:51,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 21:03:51,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-12-12 21:03:51,239 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 21:03:51,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 842 places, 7933 transitions, 684564 flow. Second operand has 17 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) [2022-12-12 21:03:51,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:03:51,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 21:03:51,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:04:57,494 INFO L130 PetriNetUnfolder]: 6099/12368 cut-off events. [2022-12-12 21:04:57,495 INFO L131 PetriNetUnfolder]: For 13350/13350 co-relation queries the response was YES. [2022-12-12 21:04:57,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543942 conditions, 12368 events. 6099/12368 cut-off events. For 13350/13350 co-relation queries the response was YES. Maximal size of possible extension queue 889. Compared 112144 event pairs, 0 based on Foata normal form. 10/10184 useless extension candidates. Maximal degree in co-relation 476073. Up to 12256 conditions per place. [2022-12-12 21:04:57,628 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 6884 selfloop transitions, 876 changer transitions 10/7770 dead transitions. [2022-12-12 21:04:57,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 864 places, 7770 transitions, 685972 flow [2022-12-12 21:04:57,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-12 21:04:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-12 21:04:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 102 transitions. [2022-12-12 21:04:57,629 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2608695652173913 [2022-12-12 21:04:57,629 INFO L295 CegarLoopForPetriNet]: 21 programPoint places, 843 predicate places. [2022-12-12 21:04:57,630 INFO L82 GeneralOperation]: Start removeDead. Operand has 864 places, 7770 transitions, 685972 flow [2022-12-12 21:04:58,032 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 861 places, 7760 transitions, 685092 flow [2022-12-12 21:04:58,033 INFO L495 AbstractCegarLoop]: Abstraction has has 861 places, 7760 transitions, 685092 flow [2022-12-12 21:04:58,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 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) [2022-12-12 21:04:58,033 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:04:58,033 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:04:58,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-12-12 21:04:58,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-12-12 21:04:58,233 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:04:58,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:04:58,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1446990133, now seen corresponding path program 36 times [2022-12-12 21:04:58,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:04:58,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053360573] [2022-12-12 21:04:58,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:04:58,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:04:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:04:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-12 21:04:58,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:04:58,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053360573] [2022-12-12 21:04:58,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053360573] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:04:58,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833314538] [2022-12-12 21:04:58,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 21:04:58,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:04:58,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:04:58,361 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:04:58,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-12 21:04:58,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-12 21:04:58,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:04:58,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 21:04:58,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:04:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 21:04:58,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:04:58,836 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 21:04:58,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833314538] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:04:58,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:04:58,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-12 21:04:58,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988512528] [2022-12-12 21:04:58,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:04:58,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 21:04:58,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:04:58,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 21:04:58,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-12-12 21:04:58,838 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-12 21:04:58,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 861 places, 7760 transitions, 685092 flow. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 21:04:58,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:04:58,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-12 21:04:58,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-12-12 21:05:14,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 21:05:14,481 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-12 21:05:14,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-12-12 21:05:14,494 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 21:05:14,494 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 21:05:14,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-12 21:05:14,682 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (18states, 0/17 universal loopers) in iteration 44,while PetriNetUnfolder was constructing finite prefix that currently has 140289 conditions, 3142 events (1658/3141 cut-off events. For 12137/12137 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 25777 event pairs, 0 based on Foata normal form. 2/3256 useless extension candidates. Maximal degree in co-relation 123955. Up to 3031 conditions per place.). [2022-12-12 21:05:14,683 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-12 21:05:14,683 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-12 21:05:14,684 INFO L445 BasicCegarLoop]: Path program histogram: [36, 3, 3, 1, 1] [2022-12-12 21:05:14,686 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 21:05:14,686 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 21:05:14,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 09:05:14 BasicIcfg [2022-12-12 21:05:14,688 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 21:05:14,688 INFO L158 Benchmark]: Toolchain (without parser) took 830345.93ms. Allocated memory was 221.2MB in the beginning and 2.4GB in the end (delta: 2.2GB). Free memory was 196.8MB in the beginning and 337.4MB in the end (delta: -140.6MB). Peak memory consumption was 2.2GB. Max. memory is 8.0GB. [2022-12-12 21:05:14,689 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 221.2MB. Free memory is still 197.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 21:05:14,689 INFO L158 Benchmark]: CACSL2BoogieTranslator took 215.86ms. Allocated memory is still 221.2MB. Free memory was 196.3MB in the beginning and 185.2MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-12-12 21:05:14,689 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.65ms. Allocated memory is still 221.2MB. Free memory was 185.2MB in the beginning and 183.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 21:05:14,689 INFO L158 Benchmark]: Boogie Preprocessor took 22.94ms. Allocated memory is still 221.2MB. Free memory was 183.2MB in the beginning and 181.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-12 21:05:14,689 INFO L158 Benchmark]: RCFGBuilder took 457.17ms. Allocated memory is still 221.2MB. Free memory was 181.6MB in the beginning and 165.4MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2022-12-12 21:05:14,690 INFO L158 Benchmark]: TraceAbstraction took 829603.78ms. Allocated memory was 221.2MB in the beginning and 2.4GB in the end (delta: 2.2GB). Free memory was 164.3MB in the beginning and 337.4MB in the end (delta: -173.1MB). Peak memory consumption was 2.1GB. Max. memory is 8.0GB. [2022-12-12 21:05:14,691 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 221.2MB. Free memory is still 197.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 215.86ms. Allocated memory is still 221.2MB. Free memory was 196.3MB in the beginning and 185.2MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 40.65ms. Allocated memory is still 221.2MB. Free memory was 185.2MB in the beginning and 183.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.94ms. Allocated memory is still 221.2MB. Free memory was 183.2MB in the beginning and 181.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 457.17ms. Allocated memory is still 221.2MB. Free memory was 181.6MB in the beginning and 165.4MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * TraceAbstraction took 829603.78ms. Allocated memory was 221.2MB in the beginning and 2.4GB in the end (delta: 2.2GB). Free memory was 164.3MB in the beginning and 337.4MB in the end (delta: -173.1MB). Peak memory consumption was 2.1GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.1s, 137 PlacesBefore, 21 PlacesAfterwards, 144 TransitionsBefore, 17 TransitionsAfterwards, 1942 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 69 TrivialYvCompositions, 47 ConcurrentYvCompositions, 11 ChoiceCompositions, 127 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 1250, independent: 1248, independent conditional: 1248, independent unconditional: 0, dependent: 2, dependent conditional: 2, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 1250, independent: 1248, independent conditional: 0, independent unconditional: 1248, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 1250, independent: 1248, independent conditional: 0, independent unconditional: 1248, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 1250, independent: 1248, independent conditional: 0, independent unconditional: 1248, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1115, independent: 1113, independent conditional: 0, independent unconditional: 1113, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1115, independent: 1113, independent conditional: 0, independent unconditional: 1113, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 22, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1250, independent: 135, independent conditional: 0, independent unconditional: 135, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 1115, unknown conditional: 0, unknown unconditional: 1115] , Statistics on independence cache: Total cache size (in pairs): 2123, Positive cache size: 2121, Positive conditional cache size: 0, Positive unconditional cache size: 2121, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (18states, 0/17 universal loopers) in iteration 44,while PetriNetUnfolder was constructing finite prefix that currently has 140289 conditions, 3142 events (1658/3141 cut-off events. For 12137/12137 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 25777 event pairs, 0 based on Foata normal form. 2/3256 useless extension candidates. Maximal degree in co-relation 123955. Up to 3031 conditions per place.). - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (18states, 0/17 universal loopers) in iteration 44,while PetriNetUnfolder was constructing finite prefix that currently has 140289 conditions, 3142 events (1658/3141 cut-off events. For 12137/12137 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 25777 event pairs, 0 based on Foata normal form. 2/3256 useless extension candidates. Maximal degree in co-relation 123955. Up to 3031 conditions per place.). - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (18states, 0/17 universal loopers) in iteration 44,while PetriNetUnfolder was constructing finite prefix that currently has 140289 conditions, 3142 events (1658/3141 cut-off events. For 12137/12137 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 25777 event pairs, 0 based on Foata normal form. 2/3256 useless extension candidates. Maximal degree in co-relation 123955. Up to 3031 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 189 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 5.7s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 829.4s, OverallIterations: 44, TraceHistogramMax: 4, PathProgramHistogramMax: 36, EmptinessCheckTime: 0.0s, AutomataDifference: 779.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.4s, HoareTripleCheckerStatistics: 55 mSolverCounterUnknown, 4966 SdHoareTripleChecker+Valid, 30.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4966 mSDsluCounter, 560 SdHoareTripleChecker+Invalid, 28.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2 IncrementalHoareTripleChecker+Unchecked, 406 mSDsCounter, 1174 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 20746 IncrementalHoareTripleChecker+Invalid, 21977 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1174 mSolverCounterUnsat, 154 mSDtfsCounter, 20746 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3031 GetRequests, 1740 SyntacticMatches, 44 SemanticMatches, 1247 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11819 ImplicationChecksByTransitivity, 35.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=685092occurred in iteration=43, InterpolantAutomatonStates: 942, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.7s AutomataMinimizationTime, 43 MinimizatonAttempts, 28706 StatesRemovedByMinimization, 43 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 25.8s InterpolantComputationTime, 1639 NumberOfCodeBlocks, 1639 NumberOfCodeBlocksAsserted, 132 NumberOfCheckSat, 2244 ConstructedInterpolants, 22 QuantifiedInterpolants, 16809 SizeOfPredicates, 182 NumberOfNonLiveVariables, 8306 ConjunctsInSsa, 594 ConjunctsInUnsatCore, 120 InterpolantComputations, 8 PerfectInterpolantSequences, 540/1155 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown