/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/mult-dist.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 15:30:09,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 15:30:09,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 15:30:09,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 15:30:09,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 15:30:09,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 15:30:09,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 15:30:09,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 15:30:09,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 15:30:09,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 15:30:09,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 15:30:09,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 15:30:09,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 15:30:09,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 15:30:09,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 15:30:09,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 15:30:09,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 15:30:09,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 15:30:09,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 15:30:09,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 15:30:09,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 15:30:09,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 15:30:09,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 15:30:09,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 15:30:09,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 15:30:09,536 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 15:30:09,536 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 15:30:09,537 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 15:30:09,537 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 15:30:09,538 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 15:30:09,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 15:30:09,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 15:30:09,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 15:30:09,539 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 15:30:09,540 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 15:30:09,540 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 15:30:09,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 15:30:09,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 15:30:09,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 15:30:09,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 15:30:09,542 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 15:30:09,543 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 15:30:09,558 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 15:30:09,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 15:30:09,559 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 15:30:09,559 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 15:30:09,559 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 15:30:09,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 15:30:09,560 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 15:30:09,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 15:30:09,560 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 15:30:09,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 15:30:09,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 15:30:09,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 15:30:09,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 15:30:09,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 15:30:09,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 15:30:09,560 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 15:30:09,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 15:30:09,561 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 15:30:09,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 15:30:09,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 15:30:09,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 15:30:09,561 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 15:30:09,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 15:30:09,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 15:30:09,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 15:30:09,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 15:30:09,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 15:30:09,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 15:30:09,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 15:30:09,562 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 15:30:09,562 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-12 15:30:09,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 15:30:09,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 15:30:09,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 15:30:09,836 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 15:30:09,836 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 15:30:09,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-dist.wvr.c [2022-12-12 15:30:10,836 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 15:30:11,031 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 15:30:11,032 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-dist.wvr.c [2022-12-12 15:30:11,043 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c4acb483/fa25e75ee12a4e53b2de373c49cbf142/FLAG2027a2a31 [2022-12-12 15:30:11,404 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c4acb483/fa25e75ee12a4e53b2de373c49cbf142 [2022-12-12 15:30:11,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 15:30:11,407 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 15:30:11,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 15:30:11,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 15:30:11,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 15:30:11,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 03:30:11" (1/1) ... [2022-12-12 15:30:11,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eb4a46d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:30:11, skipping insertion in model container [2022-12-12 15:30:11,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 03:30:11" (1/1) ... [2022-12-12 15:30:11,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 15:30:11,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 15:30:11,555 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/mult-dist.wvr.c[2116,2129] [2022-12-12 15:30:11,557 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 15:30:11,563 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 15:30:11,584 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/mult-dist.wvr.c[2116,2129] [2022-12-12 15:30:11,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 15:30:11,594 INFO L208 MainTranslator]: Completed translation [2022-12-12 15:30:11,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:30:11 WrapperNode [2022-12-12 15:30:11,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 15:30:11,597 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 15:30:11,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 15:30:11,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 15:30:11,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:30:11" (1/1) ... [2022-12-12 15:30:11,614 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:30:11" (1/1) ... [2022-12-12 15:30:11,633 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-12-12 15:30:11,633 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 15:30:11,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 15:30:11,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 15:30:11,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 15:30:11,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:30:11" (1/1) ... [2022-12-12 15:30:11,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:30:11" (1/1) ... [2022-12-12 15:30:11,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:30:11" (1/1) ... [2022-12-12 15:30:11,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:30:11" (1/1) ... [2022-12-12 15:30:11,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:30:11" (1/1) ... [2022-12-12 15:30:11,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:30:11" (1/1) ... [2022-12-12 15:30:11,663 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:30:11" (1/1) ... [2022-12-12 15:30:11,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:30:11" (1/1) ... [2022-12-12 15:30:11,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 15:30:11,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 15:30:11,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 15:30:11,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 15:30:11,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:30:11" (1/1) ... [2022-12-12 15:30:11,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 15:30:11,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:30:11,690 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 15:30:11,695 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 15:30:11,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 15:30:11,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 15:30:11,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 15:30:11,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 15:30:11,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 15:30:11,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-12 15:30:11,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-12 15:30:11,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 15:30:11,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 15:30:11,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 15:30:11,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 15:30:11,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 15:30:11,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 15:30:11,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 15:30:11,728 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 15:30:11,812 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 15:30:11,813 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 15:30:11,985 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 15:30:11,990 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 15:30:11,990 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-12 15:30:11,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 03:30:11 BoogieIcfgContainer [2022-12-12 15:30:11,994 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 15:30:11,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 15:30:11,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 15:30:11,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 15:30:11,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 03:30:11" (1/3) ... [2022-12-12 15:30:11,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6409e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 03:30:11, skipping insertion in model container [2022-12-12 15:30:11,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:30:11" (2/3) ... [2022-12-12 15:30:11,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6409e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 03:30:11, skipping insertion in model container [2022-12-12 15:30:11,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 03:30:11" (3/3) ... [2022-12-12 15:30:12,001 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2022-12-12 15:30:12,015 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 15:30:12,015 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 15:30:12,015 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 15:30:12,113 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-12 15:30:12,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 102 transitions, 228 flow [2022-12-12 15:30:12,193 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-12-12 15:30:12,194 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 15:30:12,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 99 events. 7/99 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 69 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2022-12-12 15:30:12,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 102 transitions, 228 flow [2022-12-12 15:30:12,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 89 transitions, 196 flow [2022-12-12 15:30:12,202 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 15:30:12,218 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 92 places, 89 transitions, 196 flow [2022-12-12 15:30:12,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 89 transitions, 196 flow [2022-12-12 15:30:12,242 INFO L130 PetriNetUnfolder]: 7/89 cut-off events. [2022-12-12 15:30:12,242 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 15:30:12,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 89 events. 7/89 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 72 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2022-12-12 15:30:12,245 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 92 places, 89 transitions, 196 flow [2022-12-12 15:30:12,245 INFO L226 LiptonReduction]: Number of co-enabled transitions 1320 [2022-12-12 15:30:14,415 INFO L241 LiptonReduction]: Total number of compositions: 67 [2022-12-12 15:30:14,434 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 15:30:14,441 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;@43fc2d0d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 15:30:14,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-12 15:30:14,455 INFO L130 PetriNetUnfolder]: 3/21 cut-off events. [2022-12-12 15:30:14,455 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 15:30:14,455 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:30:14,456 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:30:14,456 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:30:14,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:30:14,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1839579012, now seen corresponding path program 1 times [2022-12-12 15:30:14,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:30:14,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848361794] [2022-12-12 15:30:14,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:30:14,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:30:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:15,013 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 15:30:15,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:30:15,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848361794] [2022-12-12 15:30:15,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848361794] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:30:15,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:30:15,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-12 15:30:15,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028515065] [2022-12-12 15:30:15,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:30:15,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 15:30:15,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:30:15,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 15:30:15,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 15:30:15,043 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2022-12-12 15:30:15,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:15,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:30:15,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2022-12-12 15:30:15,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:30:15,156 INFO L130 PetriNetUnfolder]: 359/506 cut-off events. [2022-12-12 15:30:15,156 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-12 15:30:15,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 506 events. 359/506 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1613 event pairs, 39 based on Foata normal form. 1/305 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2022-12-12 15:30:15,164 INFO L137 encePairwiseOnDemand]: 17/22 looper letters, 30 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2022-12-12 15:30:15,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 38 transitions, 179 flow [2022-12-12 15:30:15,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 15:30:15,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 15:30:15,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2022-12-12 15:30:15,173 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2022-12-12 15:30:15,174 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 62 flow. Second operand 3 states and 45 transitions. [2022-12-12 15:30:15,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 38 transitions, 179 flow [2022-12-12 15:30:15,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 38 transitions, 157 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-12 15:30:15,181 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 76 flow [2022-12-12 15:30:15,182 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2022-12-12 15:30:15,185 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2022-12-12 15:30:15,186 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 76 flow [2022-12-12 15:30:15,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:15,186 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:30:15,186 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:30:15,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 15:30:15,187 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:30:15,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:30:15,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1296714879, now seen corresponding path program 1 times [2022-12-12 15:30:15,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:30:15,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414087934] [2022-12-12 15:30:15,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:30:15,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:30:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:15,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:30:15,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414087934] [2022-12-12 15:30:15,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414087934] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:30:15,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:30:15,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-12 15:30:15,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999311116] [2022-12-12 15:30:15,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:30:15,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 15:30:15,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:30:15,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 15:30:15,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-12 15:30:15,459 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:30:15,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:15,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:30:15,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:30:15,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:30:15,699 INFO L130 PetriNetUnfolder]: 638/974 cut-off events. [2022-12-12 15:30:15,703 INFO L131 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2022-12-12 15:30:15,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2341 conditions, 974 events. 638/974 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3825 event pairs, 158 based on Foata normal form. 18/992 useless extension candidates. Maximal degree in co-relation 657. Up to 394 conditions per place. [2022-12-12 15:30:15,709 INFO L137 encePairwiseOnDemand]: 14/22 looper letters, 71 selfloop transitions, 8 changer transitions 10/89 dead transitions. [2022-12-12 15:30:15,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 89 transitions, 434 flow [2022-12-12 15:30:15,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 15:30:15,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 15:30:15,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2022-12-12 15:30:15,712 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5324675324675324 [2022-12-12 15:30:15,712 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 76 flow. Second operand 7 states and 82 transitions. [2022-12-12 15:30:15,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 89 transitions, 434 flow [2022-12-12 15:30:15,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 89 transitions, 424 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-12 15:30:15,715 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 139 flow [2022-12-12 15:30:15,715 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=139, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2022-12-12 15:30:15,715 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2022-12-12 15:30:15,715 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 139 flow [2022-12-12 15:30:15,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:15,716 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:30:15,716 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:30:15,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 15:30:15,716 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:30:15,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:30:15,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1383544756, now seen corresponding path program 1 times [2022-12-12 15:30:15,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:30:15,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878785063] [2022-12-12 15:30:15,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:30:15,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:30:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:15,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:15,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:30:15,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878785063] [2022-12-12 15:30:15,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878785063] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:30:15,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994346780] [2022-12-12 15:30:15,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:30:15,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:30:15,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:30:15,891 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 15:30:15,917 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 15:30:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:16,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-12 15:30:16,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:30:16,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:16,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:30:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:16,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994346780] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 15:30:16,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 15:30:16,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 9 [2022-12-12 15:30:16,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994282981] [2022-12-12 15:30:16,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:30:16,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-12 15:30:16,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:30:16,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-12 15:30:16,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-12 15:30:16,230 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 22 [2022-12-12 15:30:16,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 139 flow. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:16,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:30:16,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 22 [2022-12-12 15:30:16,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:30:16,510 INFO L130 PetriNetUnfolder]: 815/1235 cut-off events. [2022-12-12 15:30:16,510 INFO L131 PetriNetUnfolder]: For 1380/1427 co-relation queries the response was YES. [2022-12-12 15:30:16,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3872 conditions, 1235 events. 815/1235 cut-off events. For 1380/1427 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5239 event pairs, 193 based on Foata normal form. 47/1265 useless extension candidates. Maximal degree in co-relation 3223. Up to 398 conditions per place. [2022-12-12 15:30:16,518 INFO L137 encePairwiseOnDemand]: 15/22 looper letters, 94 selfloop transitions, 16 changer transitions 0/112 dead transitions. [2022-12-12 15:30:16,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 112 transitions, 662 flow [2022-12-12 15:30:16,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 15:30:16,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 15:30:16,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 111 transitions. [2022-12-12 15:30:16,522 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6306818181818182 [2022-12-12 15:30:16,523 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 139 flow. Second operand 8 states and 111 transitions. [2022-12-12 15:30:16,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 112 transitions, 662 flow [2022-12-12 15:30:16,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 112 transitions, 634 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-12-12 15:30:16,529 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 264 flow [2022-12-12 15:30:16,529 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=264, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2022-12-12 15:30:16,530 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 18 predicate places. [2022-12-12 15:30:16,530 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 264 flow [2022-12-12 15:30:16,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:16,530 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:30:16,530 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:30:16,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-12 15:30:16,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:30:16,736 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:30:16,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:30:16,736 INFO L85 PathProgramCache]: Analyzing trace with hash 2111103730, now seen corresponding path program 1 times [2022-12-12 15:30:16,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:30:16,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782437777] [2022-12-12 15:30:16,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:30:16,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:30:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:16,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:30:16,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782437777] [2022-12-12 15:30:16,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782437777] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:30:16,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:30:16,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-12 15:30:16,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890158810] [2022-12-12 15:30:16,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:30:16,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 15:30:16,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:30:16,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 15:30:16,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-12 15:30:16,863 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:30:16,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 264 flow. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:16,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:30:16,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:30:16,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:30:17,187 INFO L130 PetriNetUnfolder]: 1126/1709 cut-off events. [2022-12-12 15:30:17,187 INFO L131 PetriNetUnfolder]: For 4611/4611 co-relation queries the response was YES. [2022-12-12 15:30:17,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6506 conditions, 1709 events. 1126/1709 cut-off events. For 4611/4611 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7569 event pairs, 276 based on Foata normal form. 20/1729 useless extension candidates. Maximal degree in co-relation 4103. Up to 728 conditions per place. [2022-12-12 15:30:17,197 INFO L137 encePairwiseOnDemand]: 13/22 looper letters, 99 selfloop transitions, 29 changer transitions 13/141 dead transitions. [2022-12-12 15:30:17,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 141 transitions, 1060 flow [2022-12-12 15:30:17,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 15:30:17,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 15:30:17,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2022-12-12 15:30:17,198 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2022-12-12 15:30:17,198 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 264 flow. Second operand 10 states and 107 transitions. [2022-12-12 15:30:17,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 141 transitions, 1060 flow [2022-12-12 15:30:17,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 141 transitions, 1046 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-12-12 15:30:17,207 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 505 flow [2022-12-12 15:30:17,207 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=505, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2022-12-12 15:30:17,208 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2022-12-12 15:30:17,208 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 505 flow [2022-12-12 15:30:17,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:17,208 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:30:17,208 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:30:17,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-12 15:30:17,208 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:30:17,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:30:17,209 INFO L85 PathProgramCache]: Analyzing trace with hash -122040396, now seen corresponding path program 2 times [2022-12-12 15:30:17,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:30:17,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879934270] [2022-12-12 15:30:17,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:30:17,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:30:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:17,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:17,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:30:17,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879934270] [2022-12-12 15:30:17,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879934270] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:30:17,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146448844] [2022-12-12 15:30:17,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:30:17,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:30:17,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:30:17,330 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 15:30:17,332 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 15:30:17,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:30:17,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:30:17,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-12 15:30:17,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:30:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:17,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:30:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:17,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146448844] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:30:17,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:30:17,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2022-12-12 15:30:17,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553497955] [2022-12-12 15:30:17,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:30:17,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 15:30:17,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:30:17,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 15:30:17,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-12-12 15:30:17,597 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:30:17,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 505 flow. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:17,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:30:17,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:30:17,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:30:18,735 INFO L130 PetriNetUnfolder]: 2194/3373 cut-off events. [2022-12-12 15:30:18,735 INFO L131 PetriNetUnfolder]: For 14864/14864 co-relation queries the response was YES. [2022-12-12 15:30:18,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15752 conditions, 3373 events. 2194/3373 cut-off events. For 14864/14864 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 17042 event pairs, 174 based on Foata normal form. 22/3395 useless extension candidates. Maximal degree in co-relation 13741. Up to 1139 conditions per place. [2022-12-12 15:30:18,754 INFO L137 encePairwiseOnDemand]: 13/22 looper letters, 230 selfloop transitions, 101 changer transitions 4/335 dead transitions. [2022-12-12 15:30:18,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 335 transitions, 2887 flow [2022-12-12 15:30:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-12 15:30:18,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-12 15:30:18,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 274 transitions. [2022-12-12 15:30:18,756 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.49818181818181817 [2022-12-12 15:30:18,756 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 505 flow. Second operand 25 states and 274 transitions. [2022-12-12 15:30:18,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 335 transitions, 2887 flow [2022-12-12 15:30:18,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 335 transitions, 2694 flow, removed 24 selfloop flow, removed 4 redundant places. [2022-12-12 15:30:18,785 INFO L231 Difference]: Finished difference. Result has 101 places, 139 transitions, 1576 flow [2022-12-12 15:30:18,785 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1576, PETRI_PLACES=101, PETRI_TRANSITIONS=139} [2022-12-12 15:30:18,786 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 72 predicate places. [2022-12-12 15:30:18,786 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 139 transitions, 1576 flow [2022-12-12 15:30:18,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:18,786 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:30:18,786 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:30:18,792 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 15:30:18,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:30:18,992 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:30:18,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:30:18,992 INFO L85 PathProgramCache]: Analyzing trace with hash 62440152, now seen corresponding path program 3 times [2022-12-12 15:30:18,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:30:18,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153243279] [2022-12-12 15:30:18,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:30:18,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:30:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:19,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:30:19,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153243279] [2022-12-12 15:30:19,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153243279] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:30:19,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770910523] [2022-12-12 15:30:19,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:30:19,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:30:19,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:30:19,151 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 15:30:19,167 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 15:30:19,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 15:30:19,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:30:19,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-12 15:30:19,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:30:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:19,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:30:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:19,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770910523] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 15:30:19,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 15:30:19,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 11 [2022-12-12 15:30:19,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661471626] [2022-12-12 15:30:19,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:30:19,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-12 15:30:19,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:30:19,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-12 15:30:19,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-12 15:30:19,407 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 22 [2022-12-12 15:30:19,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 139 transitions, 1576 flow. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:19,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:30:19,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 22 [2022-12-12 15:30:19,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:30:20,062 INFO L130 PetriNetUnfolder]: 2943/4530 cut-off events. [2022-12-12 15:30:20,062 INFO L131 PetriNetUnfolder]: For 57611/57682 co-relation queries the response was YES. [2022-12-12 15:30:20,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30258 conditions, 4530 events. 2943/4530 cut-off events. For 57611/57682 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24546 event pairs, 516 based on Foata normal form. 54/4540 useless extension candidates. Maximal degree in co-relation 24312. Up to 1621 conditions per place. [2022-12-12 15:30:20,183 INFO L137 encePairwiseOnDemand]: 15/22 looper letters, 190 selfloop transitions, 79 changer transitions 3/280 dead transitions. [2022-12-12 15:30:20,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 280 transitions, 3534 flow [2022-12-12 15:30:20,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 15:30:20,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 15:30:20,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 109 transitions. [2022-12-12 15:30:20,185 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6193181818181818 [2022-12-12 15:30:20,185 INFO L175 Difference]: Start difference. First operand has 101 places, 139 transitions, 1576 flow. Second operand 8 states and 109 transitions. [2022-12-12 15:30:20,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 280 transitions, 3534 flow [2022-12-12 15:30:20,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 280 transitions, 3107 flow, removed 205 selfloop flow, removed 1 redundant places. [2022-12-12 15:30:20,287 INFO L231 Difference]: Finished difference. Result has 113 places, 178 transitions, 2133 flow [2022-12-12 15:30:20,287 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2133, PETRI_PLACES=113, PETRI_TRANSITIONS=178} [2022-12-12 15:30:20,289 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 84 predicate places. [2022-12-12 15:30:20,290 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 178 transitions, 2133 flow [2022-12-12 15:30:20,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:20,290 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:30:20,290 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:30:20,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 15:30:20,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:30:20,495 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:30:20,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:30:20,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1353388654, now seen corresponding path program 2 times [2022-12-12 15:30:20,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:30:20,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63391009] [2022-12-12 15:30:20,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:30:20,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:30:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:20,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:30:20,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63391009] [2022-12-12 15:30:20,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63391009] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:30:20,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102360001] [2022-12-12 15:30:20,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:30:20,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:30:20,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:30:20,605 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 15:30:20,607 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 15:30:20,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:30:20,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:30:20,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-12 15:30:20,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:30:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:20,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:30:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:20,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102360001] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 15:30:20,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 15:30:20,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8] total 15 [2022-12-12 15:30:20,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358689876] [2022-12-12 15:30:20,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:30:20,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 15:30:20,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:30:20,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 15:30:20,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-12-12 15:30:20,982 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:30:20,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 178 transitions, 2133 flow. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:20,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:30:20,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:30:20,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:30:21,853 INFO L130 PetriNetUnfolder]: 3268/5055 cut-off events. [2022-12-12 15:30:21,853 INFO L131 PetriNetUnfolder]: For 66350/66350 co-relation queries the response was YES. [2022-12-12 15:30:21,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33216 conditions, 5055 events. 3268/5055 cut-off events. For 66350/66350 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 27716 event pairs, 1051 based on Foata normal form. 6/5061 useless extension candidates. Maximal degree in co-relation 30562. Up to 1897 conditions per place. [2022-12-12 15:30:21,895 INFO L137 encePairwiseOnDemand]: 14/22 looper letters, 179 selfloop transitions, 106 changer transitions 3/288 dead transitions. [2022-12-12 15:30:21,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 288 transitions, 3506 flow [2022-12-12 15:30:21,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 15:30:21,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 15:30:21,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2022-12-12 15:30:21,896 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.601010101010101 [2022-12-12 15:30:21,896 INFO L175 Difference]: Start difference. First operand has 113 places, 178 transitions, 2133 flow. Second operand 9 states and 119 transitions. [2022-12-12 15:30:21,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 288 transitions, 3506 flow [2022-12-12 15:30:22,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 288 transitions, 3486 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-12-12 15:30:22,024 INFO L231 Difference]: Finished difference. Result has 126 places, 199 transitions, 2677 flow [2022-12-12 15:30:22,024 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2121, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2677, PETRI_PLACES=126, PETRI_TRANSITIONS=199} [2022-12-12 15:30:22,025 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 97 predicate places. [2022-12-12 15:30:22,025 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 199 transitions, 2677 flow [2022-12-12 15:30:22,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:22,025 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:30:22,025 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:30:22,033 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 15:30:22,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:30:22,231 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:30:22,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:30:22,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1182863476, now seen corresponding path program 3 times [2022-12-12 15:30:22,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:30:22,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407130535] [2022-12-12 15:30:22,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:30:22,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:30:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:22,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:22,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:30:22,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407130535] [2022-12-12 15:30:22,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407130535] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:30:22,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280989843] [2022-12-12 15:30:22,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:30:22,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:30:22,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:30:22,406 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 15:30:22,408 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 15:30:22,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 15:30:22,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:30:22,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-12 15:30:22,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:30:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:22,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:30:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:22,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280989843] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 15:30:22,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 15:30:22,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2022-12-12 15:30:22,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640136165] [2022-12-12 15:30:22,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:30:22,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-12 15:30:22,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:30:22,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-12 15:30:22,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-12-12 15:30:22,639 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 22 [2022-12-12 15:30:22,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 199 transitions, 2677 flow. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:22,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:30:22,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 22 [2022-12-12 15:30:22,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:30:23,357 INFO L130 PetriNetUnfolder]: 3466/5367 cut-off events. [2022-12-12 15:30:23,357 INFO L131 PetriNetUnfolder]: For 76213/76354 co-relation queries the response was YES. [2022-12-12 15:30:23,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36922 conditions, 5367 events. 3466/5367 cut-off events. For 76213/76354 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 30264 event pairs, 1411 based on Foata normal form. 91/5412 useless extension candidates. Maximal degree in co-relation 36123. Up to 2903 conditions per place. [2022-12-12 15:30:23,396 INFO L137 encePairwiseOnDemand]: 15/22 looper letters, 176 selfloop transitions, 78 changer transitions 0/264 dead transitions. [2022-12-12 15:30:23,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 264 transitions, 3685 flow [2022-12-12 15:30:23,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 15:30:23,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 15:30:23,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2022-12-12 15:30:23,397 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2022-12-12 15:30:23,397 INFO L175 Difference]: Start difference. First operand has 126 places, 199 transitions, 2677 flow. Second operand 6 states and 84 transitions. [2022-12-12 15:30:23,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 264 transitions, 3685 flow [2022-12-12 15:30:23,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 264 transitions, 3613 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-12-12 15:30:23,549 INFO L231 Difference]: Finished difference. Result has 134 places, 210 transitions, 2996 flow [2022-12-12 15:30:23,550 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2633, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2996, PETRI_PLACES=134, PETRI_TRANSITIONS=210} [2022-12-12 15:30:23,550 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 105 predicate places. [2022-12-12 15:30:23,550 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 210 transitions, 2996 flow [2022-12-12 15:30:23,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:23,550 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:30:23,550 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:30:23,557 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 15:30:23,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:30:23,757 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:30:23,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:30:23,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1947580880, now seen corresponding path program 4 times [2022-12-12 15:30:23,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:30:23,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823055706] [2022-12-12 15:30:23,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:30:23,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:30:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:23,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:30:23,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823055706] [2022-12-12 15:30:23,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823055706] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:30:23,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373150683] [2022-12-12 15:30:23,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 15:30:23,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:30:23,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:30:23,943 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 15:30:23,946 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 15:30:24,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 15:30:24,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:30:24,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 15:30:24,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:30:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:24,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:30:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:24,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373150683] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:30:24,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:30:24,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-12 15:30:24,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691413491] [2022-12-12 15:30:24,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:30:24,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 15:30:24,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:30:24,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 15:30:24,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-12-12 15:30:24,215 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:30:24,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 210 transitions, 2996 flow. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 15:30:24,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:30:24,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:30:24,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:30:25,471 INFO L130 PetriNetUnfolder]: 4624/7299 cut-off events. [2022-12-12 15:30:25,472 INFO L131 PetriNetUnfolder]: For 111106/111106 co-relation queries the response was YES. [2022-12-12 15:30:25,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51676 conditions, 7299 events. 4624/7299 cut-off events. For 111106/111106 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 44584 event pairs, 845 based on Foata normal form. 36/7335 useless extension candidates. Maximal degree in co-relation 50805. Up to 2463 conditions per place. [2022-12-12 15:30:25,522 INFO L137 encePairwiseOnDemand]: 13/22 looper letters, 248 selfloop transitions, 183 changer transitions 6/437 dead transitions. [2022-12-12 15:30:25,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 437 transitions, 6177 flow [2022-12-12 15:30:25,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 15:30:25,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 15:30:25,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 162 transitions. [2022-12-12 15:30:25,523 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2022-12-12 15:30:25,523 INFO L175 Difference]: Start difference. First operand has 134 places, 210 transitions, 2996 flow. Second operand 12 states and 162 transitions. [2022-12-12 15:30:25,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 437 transitions, 6177 flow [2022-12-12 15:30:25,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 437 transitions, 6086 flow, removed 11 selfloop flow, removed 1 redundant places. [2022-12-12 15:30:25,795 INFO L231 Difference]: Finished difference. Result has 151 places, 279 transitions, 4637 flow [2022-12-12 15:30:25,795 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2919, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4637, PETRI_PLACES=151, PETRI_TRANSITIONS=279} [2022-12-12 15:30:25,795 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 122 predicate places. [2022-12-12 15:30:25,795 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 279 transitions, 4637 flow [2022-12-12 15:30:25,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 15:30:25,796 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:30:25,796 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:30:25,800 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 15:30:26,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:30:26,002 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:30:26,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:30:26,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1113349701, now seen corresponding path program 2 times [2022-12-12 15:30:26,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:30:26,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202223361] [2022-12-12 15:30:26,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:30:26,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:30:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:26,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:30:26,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202223361] [2022-12-12 15:30:26,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202223361] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:30:26,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:30:26,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-12 15:30:26,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975140935] [2022-12-12 15:30:26,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:30:26,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 15:30:26,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:30:26,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 15:30:26,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-12 15:30:26,124 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:30:26,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 279 transitions, 4637 flow. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:26,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:30:26,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:30:26,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:30:27,267 INFO L130 PetriNetUnfolder]: 4662/7393 cut-off events. [2022-12-12 15:30:27,267 INFO L131 PetriNetUnfolder]: For 135166/135166 co-relation queries the response was YES. [2022-12-12 15:30:27,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56342 conditions, 7393 events. 4662/7393 cut-off events. For 135166/135166 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 45692 event pairs, 1716 based on Foata normal form. 16/7409 useless extension candidates. Maximal degree in co-relation 55405. Up to 5322 conditions per place. [2022-12-12 15:30:27,322 INFO L137 encePairwiseOnDemand]: 13/22 looper letters, 292 selfloop transitions, 65 changer transitions 13/370 dead transitions. [2022-12-12 15:30:27,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 370 transitions, 6367 flow [2022-12-12 15:30:27,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 15:30:27,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 15:30:27,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2022-12-12 15:30:27,323 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2022-12-12 15:30:27,323 INFO L175 Difference]: Start difference. First operand has 151 places, 279 transitions, 4637 flow. Second operand 8 states and 85 transitions. [2022-12-12 15:30:27,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 370 transitions, 6367 flow [2022-12-12 15:30:27,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 370 transitions, 6247 flow, removed 18 selfloop flow, removed 1 redundant places. [2022-12-12 15:30:27,644 INFO L231 Difference]: Finished difference. Result has 163 places, 291 transitions, 4999 flow [2022-12-12 15:30:27,644 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=4543, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4999, PETRI_PLACES=163, PETRI_TRANSITIONS=291} [2022-12-12 15:30:27,644 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 134 predicate places. [2022-12-12 15:30:27,645 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 291 transitions, 4999 flow [2022-12-12 15:30:27,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:27,645 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:30:27,645 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:30:27,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-12 15:30:27,645 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:30:27,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:30:27,645 INFO L85 PathProgramCache]: Analyzing trace with hash -25744466, now seen corresponding path program 4 times [2022-12-12 15:30:27,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:30:27,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518441029] [2022-12-12 15:30:27,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:30:27,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:30:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:27,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:30:27,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518441029] [2022-12-12 15:30:27,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518441029] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:30:27,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175975416] [2022-12-12 15:30:27,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 15:30:27,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:30:27,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:30:27,817 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 15:30:27,827 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 15:30:27,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 15:30:27,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:30:27,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 15:30:27,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:30:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:28,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:30:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:28,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175975416] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 15:30:28,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 15:30:28,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 11 [2022-12-12 15:30:28,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104539152] [2022-12-12 15:30:28,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:30:28,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-12 15:30:28,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:30:28,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-12 15:30:28,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-12 15:30:28,106 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 22 [2022-12-12 15:30:28,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 291 transitions, 4999 flow. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:28,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:30:28,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 22 [2022-12-12 15:30:28,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:30:29,270 INFO L130 PetriNetUnfolder]: 4559/7214 cut-off events. [2022-12-12 15:30:29,270 INFO L131 PetriNetUnfolder]: For 153387/153477 co-relation queries the response was YES. [2022-12-12 15:30:29,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58035 conditions, 7214 events. 4559/7214 cut-off events. For 153387/153477 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 44112 event pairs, 1413 based on Foata normal form. 47/7238 useless extension candidates. Maximal degree in co-relation 57182. Up to 2719 conditions per place. [2022-12-12 15:30:29,321 INFO L137 encePairwiseOnDemand]: 15/22 looper letters, 194 selfloop transitions, 165 changer transitions 2/373 dead transitions. [2022-12-12 15:30:29,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 373 transitions, 6442 flow [2022-12-12 15:30:29,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 15:30:29,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 15:30:29,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2022-12-12 15:30:29,323 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6420454545454546 [2022-12-12 15:30:29,323 INFO L175 Difference]: Start difference. First operand has 163 places, 291 transitions, 4999 flow. Second operand 8 states and 113 transitions. [2022-12-12 15:30:29,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 373 transitions, 6442 flow [2022-12-12 15:30:29,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 373 transitions, 6284 flow, removed 58 selfloop flow, removed 2 redundant places. [2022-12-12 15:30:29,758 INFO L231 Difference]: Finished difference. Result has 169 places, 294 transitions, 5276 flow [2022-12-12 15:30:29,758 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=4864, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5276, PETRI_PLACES=169, PETRI_TRANSITIONS=294} [2022-12-12 15:30:29,758 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 140 predicate places. [2022-12-12 15:30:29,759 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 294 transitions, 5276 flow [2022-12-12 15:30:29,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:29,759 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:30:29,759 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:30:29,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-12 15:30:29,963 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 15:30:29,963 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:30:29,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:30:29,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1186302520, now seen corresponding path program 5 times [2022-12-12 15:30:29,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:30:29,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200167378] [2022-12-12 15:30:29,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:30:29,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:30:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:30,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:30:30,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200167378] [2022-12-12 15:30:30,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200167378] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:30:30,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167180497] [2022-12-12 15:30:30,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 15:30:30,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:30:30,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:30:30,086 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 15:30:30,087 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 15:30:30,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:30:30,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:30:30,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-12 15:30:30,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:30:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:30,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:30:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:30,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167180497] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 15:30:30,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 15:30:30,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2022-12-12 15:30:30,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240882360] [2022-12-12 15:30:30,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:30:30,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-12 15:30:30,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:30:30,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-12 15:30:30,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-12-12 15:30:30,371 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 22 [2022-12-12 15:30:30,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 294 transitions, 5276 flow. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:30,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:30:30,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 22 [2022-12-12 15:30:30,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:30:31,657 INFO L130 PetriNetUnfolder]: 5101/8063 cut-off events. [2022-12-12 15:30:31,657 INFO L131 PetriNetUnfolder]: For 165283/165368 co-relation queries the response was YES. [2022-12-12 15:30:31,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63428 conditions, 8063 events. 5101/8063 cut-off events. For 165283/165368 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 50161 event pairs, 1249 based on Foata normal form. 35/8080 useless extension candidates. Maximal degree in co-relation 63022. Up to 3731 conditions per place. [2022-12-12 15:30:31,722 INFO L137 encePairwiseOnDemand]: 15/22 looper letters, 256 selfloop transitions, 136 changer transitions 0/404 dead transitions. [2022-12-12 15:30:31,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 404 transitions, 7228 flow [2022-12-12 15:30:31,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 15:30:31,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 15:30:31,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2022-12-12 15:30:31,732 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6420454545454546 [2022-12-12 15:30:31,732 INFO L175 Difference]: Start difference. First operand has 169 places, 294 transitions, 5276 flow. Second operand 8 states and 113 transitions. [2022-12-12 15:30:31,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 404 transitions, 7228 flow [2022-12-12 15:30:32,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 404 transitions, 6897 flow, removed 25 selfloop flow, removed 4 redundant places. [2022-12-12 15:30:32,289 INFO L231 Difference]: Finished difference. Result has 176 places, 320 transitions, 5874 flow [2022-12-12 15:30:32,289 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=4985, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5874, PETRI_PLACES=176, PETRI_TRANSITIONS=320} [2022-12-12 15:30:32,290 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 147 predicate places. [2022-12-12 15:30:32,290 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 320 transitions, 5874 flow [2022-12-12 15:30:32,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:32,290 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:30:32,290 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:30:32,295 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 15:30:32,491 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 15:30:32,493 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:30:32,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:30:32,493 INFO L85 PathProgramCache]: Analyzing trace with hash 255821494, now seen corresponding path program 6 times [2022-12-12 15:30:32,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:30:32,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814389260] [2022-12-12 15:30:32,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:30:32,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:30:32,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:32,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:30:32,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814389260] [2022-12-12 15:30:32,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814389260] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:30:32,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421760996] [2022-12-12 15:30:32,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 15:30:32,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:30:32,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:30:32,618 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 15:30:32,621 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 15:30:32,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 15:30:32,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:30:32,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-12 15:30:32,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:30:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:32,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:30:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:32,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421760996] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 15:30:32,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 15:30:32,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 11 [2022-12-12 15:30:32,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409032169] [2022-12-12 15:30:32,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:30:32,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-12 15:30:32,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:30:32,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-12 15:30:32,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-12-12 15:30:32,805 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 22 [2022-12-12 15:30:32,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 320 transitions, 5874 flow. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:32,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:30:32,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 22 [2022-12-12 15:30:32,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:30:34,098 INFO L130 PetriNetUnfolder]: 5081/8042 cut-off events. [2022-12-12 15:30:34,098 INFO L131 PetriNetUnfolder]: For 172474/172562 co-relation queries the response was YES. [2022-12-12 15:30:34,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64335 conditions, 8042 events. 5081/8042 cut-off events. For 172474/172562 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 50237 event pairs, 1865 based on Foata normal form. 47/8066 useless extension candidates. Maximal degree in co-relation 62834. Up to 4674 conditions per place. [2022-12-12 15:30:34,195 INFO L137 encePairwiseOnDemand]: 15/22 looper letters, 256 selfloop transitions, 110 changer transitions 0/378 dead transitions. [2022-12-12 15:30:34,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 378 transitions, 7093 flow [2022-12-12 15:30:34,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 15:30:34,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 15:30:34,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 80 transitions. [2022-12-12 15:30:34,201 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2022-12-12 15:30:34,202 INFO L175 Difference]: Start difference. First operand has 176 places, 320 transitions, 5874 flow. Second operand 6 states and 80 transitions. [2022-12-12 15:30:34,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 378 transitions, 7093 flow [2022-12-12 15:30:34,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 378 transitions, 6861 flow, removed 33 selfloop flow, removed 3 redundant places. [2022-12-12 15:30:34,863 INFO L231 Difference]: Finished difference. Result has 181 places, 323 transitions, 5991 flow [2022-12-12 15:30:34,863 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5656, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5991, PETRI_PLACES=181, PETRI_TRANSITIONS=323} [2022-12-12 15:30:34,864 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 152 predicate places. [2022-12-12 15:30:34,864 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 323 transitions, 5991 flow [2022-12-12 15:30:34,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:34,864 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:30:34,864 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:30:34,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-12 15:30:35,069 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 15:30:35,069 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:30:35,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:30:35,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1495265784, now seen corresponding path program 7 times [2022-12-12 15:30:35,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:30:35,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813641068] [2022-12-12 15:30:35,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:30:35,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:30:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:35,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:30:35,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813641068] [2022-12-12 15:30:35,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813641068] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:30:35,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879136246] [2022-12-12 15:30:35,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 15:30:35,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:30:35,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:30:35,257 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 15:30:35,280 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 15:30:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:35,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-12 15:30:35,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:30:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:35,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:30:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:35,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879136246] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 15:30:35,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 15:30:35,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 10 [2022-12-12 15:30:35,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310221985] [2022-12-12 15:30:35,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:30:35,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-12 15:30:35,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:30:35,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-12 15:30:35,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-12 15:30:35,453 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 22 [2022-12-12 15:30:35,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 323 transitions, 5991 flow. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:35,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:30:35,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 22 [2022-12-12 15:30:35,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:30:36,719 INFO L130 PetriNetUnfolder]: 5066/7999 cut-off events. [2022-12-12 15:30:36,719 INFO L131 PetriNetUnfolder]: For 168032/168120 co-relation queries the response was YES. [2022-12-12 15:30:36,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64687 conditions, 7999 events. 5066/7999 cut-off events. For 168032/168120 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 49700 event pairs, 1873 based on Foata normal form. 37/8013 useless extension candidates. Maximal degree in co-relation 63422. Up to 4674 conditions per place. [2022-12-12 15:30:36,778 INFO L137 encePairwiseOnDemand]: 15/22 looper letters, 256 selfloop transitions, 109 changer transitions 0/377 dead transitions. [2022-12-12 15:30:36,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 377 transitions, 7141 flow [2022-12-12 15:30:36,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 15:30:36,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 15:30:36,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 78 transitions. [2022-12-12 15:30:36,780 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2022-12-12 15:30:36,780 INFO L175 Difference]: Start difference. First operand has 181 places, 323 transitions, 5991 flow. Second operand 6 states and 78 transitions. [2022-12-12 15:30:36,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 377 transitions, 7141 flow [2022-12-12 15:30:37,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 377 transitions, 6947 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-12-12 15:30:37,245 INFO L231 Difference]: Finished difference. Result has 186 places, 324 transitions, 6050 flow [2022-12-12 15:30:37,245 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5797, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6050, PETRI_PLACES=186, PETRI_TRANSITIONS=324} [2022-12-12 15:30:37,246 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 157 predicate places. [2022-12-12 15:30:37,246 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 324 transitions, 6050 flow [2022-12-12 15:30:37,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:37,246 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:30:37,246 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:30:37,256 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 15:30:37,451 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 15:30:37,451 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:30:37,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:30:37,451 INFO L85 PathProgramCache]: Analyzing trace with hash -661744019, now seen corresponding path program 3 times [2022-12-12 15:30:37,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:30:37,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888281603] [2022-12-12 15:30:37,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:30:37,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:30:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:37,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:30:37,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888281603] [2022-12-12 15:30:37,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888281603] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:30:37,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:30:37,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-12 15:30:37,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407257930] [2022-12-12 15:30:37,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:30:37,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 15:30:37,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:30:37,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 15:30:37,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-12 15:30:37,564 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:30:37,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 324 transitions, 6050 flow. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:37,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:30:37,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:30:37,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:30:39,053 INFO L130 PetriNetUnfolder]: 5159/8141 cut-off events. [2022-12-12 15:30:39,053 INFO L131 PetriNetUnfolder]: For 171521/171521 co-relation queries the response was YES. [2022-12-12 15:30:39,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65860 conditions, 8141 events. 5159/8141 cut-off events. For 171521/171521 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 50467 event pairs, 2050 based on Foata normal form. 10/8151 useless extension candidates. Maximal degree in co-relation 64951. Up to 5864 conditions per place. [2022-12-12 15:30:39,116 INFO L137 encePairwiseOnDemand]: 13/22 looper letters, 309 selfloop transitions, 69 changer transitions 10/388 dead transitions. [2022-12-12 15:30:39,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 388 transitions, 7542 flow [2022-12-12 15:30:39,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 15:30:39,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 15:30:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2022-12-12 15:30:39,117 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5324675324675324 [2022-12-12 15:30:39,117 INFO L175 Difference]: Start difference. First operand has 186 places, 324 transitions, 6050 flow. Second operand 7 states and 82 transitions. [2022-12-12 15:30:39,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 388 transitions, 7542 flow [2022-12-12 15:30:39,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 388 transitions, 7362 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-12-12 15:30:39,606 INFO L231 Difference]: Finished difference. Result has 195 places, 337 transitions, 6375 flow [2022-12-12 15:30:39,606 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5870, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6375, PETRI_PLACES=195, PETRI_TRANSITIONS=337} [2022-12-12 15:30:39,606 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 166 predicate places. [2022-12-12 15:30:39,606 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 337 transitions, 6375 flow [2022-12-12 15:30:39,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:39,606 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:30:39,606 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:30:39,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-12 15:30:39,607 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:30:39,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:30:39,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1337233348, now seen corresponding path program 5 times [2022-12-12 15:30:39,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:30:39,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818650130] [2022-12-12 15:30:39,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:30:39,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:30:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:39,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:30:39,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818650130] [2022-12-12 15:30:39,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818650130] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:30:39,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452532955] [2022-12-12 15:30:39,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 15:30:39,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:30:39,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:30:39,701 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 15:30:39,727 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 15:30:39,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:30:39,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:30:39,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-12 15:30:39,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:30:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:39,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:30:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:39,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452532955] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:30:39,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:30:39,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-12 15:30:39,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110141512] [2022-12-12 15:30:39,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:30:39,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 15:30:39,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:30:39,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 15:30:39,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-12-12 15:30:39,943 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:30:39,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 337 transitions, 6375 flow. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 15:30:39,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:30:39,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:30:39,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:30:41,325 INFO L130 PetriNetUnfolder]: 5430/8603 cut-off events. [2022-12-12 15:30:41,325 INFO L131 PetriNetUnfolder]: For 183482/183482 co-relation queries the response was YES. [2022-12-12 15:30:41,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70627 conditions, 8603 events. 5430/8603 cut-off events. For 183482/183482 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 54360 event pairs, 988 based on Foata normal form. 28/8631 useless extension candidates. Maximal degree in co-relation 69717. Up to 2987 conditions per place. [2022-12-12 15:30:41,390 INFO L137 encePairwiseOnDemand]: 13/22 looper letters, 266 selfloop transitions, 229 changer transitions 5/500 dead transitions. [2022-12-12 15:30:41,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 500 transitions, 9246 flow [2022-12-12 15:30:41,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 15:30:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 15:30:41,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2022-12-12 15:30:41,405 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5409090909090909 [2022-12-12 15:30:41,405 INFO L175 Difference]: Start difference. First operand has 195 places, 337 transitions, 6375 flow. Second operand 10 states and 119 transitions. [2022-12-12 15:30:41,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 500 transitions, 9246 flow [2022-12-12 15:30:41,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 500 transitions, 9129 flow, removed 30 selfloop flow, removed 2 redundant places. [2022-12-12 15:30:41,947 INFO L231 Difference]: Finished difference. Result has 205 places, 373 transitions, 7617 flow [2022-12-12 15:30:41,947 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6267, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7617, PETRI_PLACES=205, PETRI_TRANSITIONS=373} [2022-12-12 15:30:41,947 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 176 predicate places. [2022-12-12 15:30:41,947 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 373 transitions, 7617 flow [2022-12-12 15:30:41,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 15:30:41,947 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:30:41,948 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:30:41,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-12 15:30:42,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-12 15:30:42,152 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:30:42,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:30:42,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1609054800, now seen corresponding path program 6 times [2022-12-12 15:30:42,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:30:42,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233383195] [2022-12-12 15:30:42,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:30:42,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:30:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:42,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:30:42,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233383195] [2022-12-12 15:30:42,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233383195] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:30:42,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:30:42,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-12 15:30:42,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305349696] [2022-12-12 15:30:42,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:30:42,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 15:30:42,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:30:42,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 15:30:42,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-12 15:30:42,370 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:30:42,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 373 transitions, 7617 flow. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:42,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:30:42,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:30:42,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:30:43,894 INFO L130 PetriNetUnfolder]: 5397/8536 cut-off events. [2022-12-12 15:30:43,895 INFO L131 PetriNetUnfolder]: For 208987/208987 co-relation queries the response was YES. [2022-12-12 15:30:43,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73417 conditions, 8536 events. 5397/8536 cut-off events. For 208987/208987 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 53600 event pairs, 1560 based on Foata normal form. 4/8540 useless extension candidates. Maximal degree in co-relation 72494. Up to 3961 conditions per place. [2022-12-12 15:30:43,970 INFO L137 encePairwiseOnDemand]: 14/22 looper letters, 341 selfloop transitions, 105 changer transitions 4/450 dead transitions. [2022-12-12 15:30:43,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 450 transitions, 9263 flow [2022-12-12 15:30:43,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 15:30:43,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 15:30:43,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 71 transitions. [2022-12-12 15:30:43,971 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2022-12-12 15:30:43,971 INFO L175 Difference]: Start difference. First operand has 205 places, 373 transitions, 7617 flow. Second operand 7 states and 71 transitions. [2022-12-12 15:30:43,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 450 transitions, 9263 flow [2022-12-12 15:30:44,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 450 transitions, 9003 flow, removed 28 selfloop flow, removed 5 redundant places. [2022-12-12 15:30:44,757 INFO L231 Difference]: Finished difference. Result has 207 places, 374 transitions, 7601 flow [2022-12-12 15:30:44,757 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7365, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7601, PETRI_PLACES=207, PETRI_TRANSITIONS=374} [2022-12-12 15:30:44,757 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 178 predicate places. [2022-12-12 15:30:44,758 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 374 transitions, 7601 flow [2022-12-12 15:30:44,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:44,758 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:30:44,758 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:30:44,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-12 15:30:44,758 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:30:44,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:30:44,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1305894810, now seen corresponding path program 7 times [2022-12-12 15:30:44,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:30:44,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082695857] [2022-12-12 15:30:44,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:30:44,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:30:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:44,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:30:44,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082695857] [2022-12-12 15:30:44,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082695857] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:30:44,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:30:44,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-12 15:30:44,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728276839] [2022-12-12 15:30:44,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:30:44,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 15:30:44,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:30:44,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 15:30:44,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-12 15:30:44,849 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:30:44,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 374 transitions, 7601 flow. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:44,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:30:44,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:30:44,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:30:46,310 INFO L130 PetriNetUnfolder]: 5426/8581 cut-off events. [2022-12-12 15:30:46,310 INFO L131 PetriNetUnfolder]: For 215030/215030 co-relation queries the response was YES. [2022-12-12 15:30:46,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74133 conditions, 8581 events. 5426/8581 cut-off events. For 215030/215030 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 53926 event pairs, 1562 based on Foata normal form. 20/8601 useless extension candidates. Maximal degree in co-relation 73232. Up to 3977 conditions per place. [2022-12-12 15:30:46,397 INFO L137 encePairwiseOnDemand]: 14/22 looper letters, 350 selfloop transitions, 108 changer transitions 0/458 dead transitions. [2022-12-12 15:30:46,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 458 transitions, 9350 flow [2022-12-12 15:30:46,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 15:30:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 15:30:46,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 75 transitions. [2022-12-12 15:30:46,399 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2022-12-12 15:30:46,399 INFO L175 Difference]: Start difference. First operand has 207 places, 374 transitions, 7601 flow. Second operand 7 states and 75 transitions. [2022-12-12 15:30:46,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 458 transitions, 9350 flow [2022-12-12 15:30:47,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 458 transitions, 9142 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-12-12 15:30:47,158 INFO L231 Difference]: Finished difference. Result has 210 places, 377 transitions, 7685 flow [2022-12-12 15:30:47,158 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7393, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7685, PETRI_PLACES=210, PETRI_TRANSITIONS=377} [2022-12-12 15:30:47,158 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 181 predicate places. [2022-12-12 15:30:47,158 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 377 transitions, 7685 flow [2022-12-12 15:30:47,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:47,159 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:30:47,159 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:30:47,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-12 15:30:47,159 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:30:47,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:30:47,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1236000456, now seen corresponding path program 8 times [2022-12-12 15:30:47,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:30:47,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320638091] [2022-12-12 15:30:47,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:30:47,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:30:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:47,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:30:47,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320638091] [2022-12-12 15:30:47,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320638091] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:30:47,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:30:47,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-12 15:30:47,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802068834] [2022-12-12 15:30:47,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:30:47,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 15:30:47,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:30:47,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 15:30:47,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-12 15:30:47,267 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:30:47,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 377 transitions, 7685 flow. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:47,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:30:47,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:30:47,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:30:48,833 INFO L130 PetriNetUnfolder]: 5503/8769 cut-off events. [2022-12-12 15:30:48,834 INFO L131 PetriNetUnfolder]: For 224397/224397 co-relation queries the response was YES. [2022-12-12 15:30:48,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75917 conditions, 8769 events. 5503/8769 cut-off events. For 224397/224397 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 56323 event pairs, 1140 based on Foata normal form. 48/8817 useless extension candidates. Maximal degree in co-relation 75015. Up to 3868 conditions per place. [2022-12-12 15:30:48,913 INFO L137 encePairwiseOnDemand]: 14/22 looper letters, 336 selfloop transitions, 200 changer transitions 11/547 dead transitions. [2022-12-12 15:30:48,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 547 transitions, 11991 flow [2022-12-12 15:30:48,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 15:30:48,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 15:30:48,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 68 transitions. [2022-12-12 15:30:48,914 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2022-12-12 15:30:48,914 INFO L175 Difference]: Start difference. First operand has 210 places, 377 transitions, 7685 flow. Second operand 7 states and 68 transitions. [2022-12-12 15:30:48,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 547 transitions, 11991 flow [2022-12-12 15:30:49,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 547 transitions, 11680 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-12-12 15:30:49,769 INFO L231 Difference]: Finished difference. Result has 217 places, 399 transitions, 8738 flow [2022-12-12 15:30:49,770 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7476, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8738, PETRI_PLACES=217, PETRI_TRANSITIONS=399} [2022-12-12 15:30:49,770 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 188 predicate places. [2022-12-12 15:30:49,770 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 399 transitions, 8738 flow [2022-12-12 15:30:49,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:49,770 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:30:49,770 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:30:49,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-12 15:30:49,771 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:30:49,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:30:49,771 INFO L85 PathProgramCache]: Analyzing trace with hash 681435040, now seen corresponding path program 9 times [2022-12-12 15:30:49,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:30:49,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996750613] [2022-12-12 15:30:49,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:30:49,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:30:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:49,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:30:49,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996750613] [2022-12-12 15:30:49,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996750613] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:30:49,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700552741] [2022-12-12 15:30:49,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:30:49,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:30:49,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:30:49,871 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 15:30:49,901 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 15:30:49,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 15:30:49,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:30:49,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-12 15:30:49,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:30:50,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:50,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:30:50,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:50,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700552741] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:30:50,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:30:50,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2022-12-12 15:30:50,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890116832] [2022-12-12 15:30:50,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:30:50,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 15:30:50,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:30:50,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 15:30:50,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-12-12 15:30:50,350 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:30:50,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 399 transitions, 8738 flow. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:50,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:30:50,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:30:50,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:30:53,147 INFO L130 PetriNetUnfolder]: 7552/12028 cut-off events. [2022-12-12 15:30:53,148 INFO L131 PetriNetUnfolder]: For 352890/352890 co-relation queries the response was YES. [2022-12-12 15:30:53,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108469 conditions, 12028 events. 7552/12028 cut-off events. For 352890/352890 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 81224 event pairs, 1447 based on Foata normal form. 56/12084 useless extension candidates. Maximal degree in co-relation 106845. Up to 4148 conditions per place. [2022-12-12 15:30:53,258 INFO L137 encePairwiseOnDemand]: 13/22 looper letters, 564 selfloop transitions, 211 changer transitions 2/777 dead transitions. [2022-12-12 15:30:53,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 777 transitions, 16459 flow [2022-12-12 15:30:53,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-12 15:30:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-12 15:30:53,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 191 transitions. [2022-12-12 15:30:53,261 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4823232323232323 [2022-12-12 15:30:53,261 INFO L175 Difference]: Start difference. First operand has 217 places, 399 transitions, 8738 flow. Second operand 18 states and 191 transitions. [2022-12-12 15:30:53,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 777 transitions, 16459 flow [2022-12-12 15:30:54,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 777 transitions, 15889 flow, removed 160 selfloop flow, removed 2 redundant places. [2022-12-12 15:30:54,807 INFO L231 Difference]: Finished difference. Result has 246 places, 461 transitions, 10579 flow [2022-12-12 15:30:54,808 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8412, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10579, PETRI_PLACES=246, PETRI_TRANSITIONS=461} [2022-12-12 15:30:54,808 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 217 predicate places. [2022-12-12 15:30:54,808 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 461 transitions, 10579 flow [2022-12-12 15:30:54,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:54,808 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:30:54,808 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:30:54,815 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 15:30:55,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:30:55,012 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:30:55,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:30:55,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1760553252, now seen corresponding path program 10 times [2022-12-12 15:30:55,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:30:55,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127732349] [2022-12-12 15:30:55,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:30:55,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:30:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:30:55,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:30:55,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:30:55,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127732349] [2022-12-12 15:30:55,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127732349] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:30:55,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:30:55,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-12 15:30:55,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109083160] [2022-12-12 15:30:55,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:30:55,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 15:30:55,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:30:55,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 15:30:55,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-12 15:30:55,139 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:30:55,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 461 transitions, 10579 flow. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:30:55,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:30:55,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:30:55,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:30:57,857 INFO L130 PetriNetUnfolder]: 8311/13460 cut-off events. [2022-12-12 15:30:57,864 INFO L131 PetriNetUnfolder]: For 477858/477858 co-relation queries the response was YES. [2022-12-12 15:30:57,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128548 conditions, 13460 events. 8311/13460 cut-off events. For 477858/477858 co-relation queries the response was YES. Maximal size of possible extension queue 807. Compared 94566 event pairs, 2373 based on Foata normal form. 72/13532 useless extension candidates. Maximal degree in co-relation 127964. Up to 5980 conditions per place. [2022-12-12 15:30:58,010 INFO L137 encePairwiseOnDemand]: 14/22 looper letters, 345 selfloop transitions, 302 changer transitions 12/659 dead transitions. [2022-12-12 15:30:58,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 659 transitions, 15759 flow [2022-12-12 15:30:58,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 15:30:58,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 15:30:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2022-12-12 15:30:58,011 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5 [2022-12-12 15:30:58,011 INFO L175 Difference]: Start difference. First operand has 246 places, 461 transitions, 10579 flow. Second operand 7 states and 77 transitions. [2022-12-12 15:30:58,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 659 transitions, 15759 flow [2022-12-12 15:31:00,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 659 transitions, 15315 flow, removed 122 selfloop flow, removed 2 redundant places. [2022-12-12 15:31:00,456 INFO L231 Difference]: Finished difference. Result has 255 places, 531 transitions, 13019 flow [2022-12-12 15:31:00,456 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=10226, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13019, PETRI_PLACES=255, PETRI_TRANSITIONS=531} [2022-12-12 15:31:00,456 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 226 predicate places. [2022-12-12 15:31:00,456 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 531 transitions, 13019 flow [2022-12-12 15:31:00,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:31:00,457 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:31:00,457 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:31:00,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-12 15:31:00,457 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:31:00,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:31:00,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1629894366, now seen corresponding path program 11 times [2022-12-12 15:31:00,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:31:00,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363849460] [2022-12-12 15:31:00,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:31:00,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:31:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:31:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:31:00,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:31:00,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363849460] [2022-12-12 15:31:00,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363849460] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:31:00,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:31:00,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-12 15:31:00,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856501396] [2022-12-12 15:31:00,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:31:00,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 15:31:00,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:31:00,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 15:31:00,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-12 15:31:00,553 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:31:00,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 531 transitions, 13019 flow. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:31:00,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:31:00,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:31:00,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:31:03,512 INFO L130 PetriNetUnfolder]: 8258/13322 cut-off events. [2022-12-12 15:31:03,513 INFO L131 PetriNetUnfolder]: For 508662/508662 co-relation queries the response was YES. [2022-12-12 15:31:03,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131195 conditions, 13322 events. 8258/13322 cut-off events. For 508662/508662 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 92669 event pairs, 2819 based on Foata normal form. 12/13334 useless extension candidates. Maximal degree in co-relation 130600. Up to 6571 conditions per place. [2022-12-12 15:31:03,656 INFO L137 encePairwiseOnDemand]: 14/22 looper letters, 414 selfloop transitions, 194 changer transitions 13/621 dead transitions. [2022-12-12 15:31:03,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 621 transitions, 15435 flow [2022-12-12 15:31:03,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 15:31:03,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 15:31:03,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 75 transitions. [2022-12-12 15:31:03,658 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2022-12-12 15:31:03,658 INFO L175 Difference]: Start difference. First operand has 255 places, 531 transitions, 13019 flow. Second operand 7 states and 75 transitions. [2022-12-12 15:31:03,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 621 transitions, 15435 flow [2022-12-12 15:31:06,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 621 transitions, 15167 flow, removed 104 selfloop flow, removed 2 redundant places. [2022-12-12 15:31:06,123 INFO L231 Difference]: Finished difference. Result has 261 places, 531 transitions, 13226 flow [2022-12-12 15:31:06,124 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12787, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13226, PETRI_PLACES=261, PETRI_TRANSITIONS=531} [2022-12-12 15:31:06,124 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 232 predicate places. [2022-12-12 15:31:06,124 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 531 transitions, 13226 flow [2022-12-12 15:31:06,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:31:06,124 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:31:06,125 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:31:06,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-12 15:31:06,126 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:31:06,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:31:06,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1900773324, now seen corresponding path program 12 times [2022-12-12 15:31:06,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:31:06,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227047097] [2022-12-12 15:31:06,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:31:06,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:31:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:31:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:31:06,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:31:06,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227047097] [2022-12-12 15:31:06,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227047097] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:31:06,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:31:06,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-12 15:31:06,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897985712] [2022-12-12 15:31:06,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:31:06,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 15:31:06,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:31:06,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 15:31:06,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-12 15:31:06,249 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:31:06,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 531 transitions, 13226 flow. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:31:06,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:31:06,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:31:06,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:31:09,162 INFO L130 PetriNetUnfolder]: 8238/13412 cut-off events. [2022-12-12 15:31:09,163 INFO L131 PetriNetUnfolder]: For 498569/498569 co-relation queries the response was YES. [2022-12-12 15:31:09,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130914 conditions, 13412 events. 8238/13412 cut-off events. For 498569/498569 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 94888 event pairs, 2919 based on Foata normal form. 64/13476 useless extension candidates. Maximal degree in co-relation 130300. Up to 6571 conditions per place. [2022-12-12 15:31:09,310 INFO L137 encePairwiseOnDemand]: 14/22 looper letters, 408 selfloop transitions, 243 changer transitions 11/662 dead transitions. [2022-12-12 15:31:09,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 662 transitions, 16799 flow [2022-12-12 15:31:09,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 15:31:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 15:31:09,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2022-12-12 15:31:09,311 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.512987012987013 [2022-12-12 15:31:09,312 INFO L175 Difference]: Start difference. First operand has 261 places, 531 transitions, 13226 flow. Second operand 7 states and 79 transitions. [2022-12-12 15:31:09,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 662 transitions, 16799 flow [2022-12-12 15:31:11,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 662 transitions, 16334 flow, removed 11 selfloop flow, removed 8 redundant places. [2022-12-12 15:31:11,751 INFO L231 Difference]: Finished difference. Result has 262 places, 557 transitions, 14345 flow [2022-12-12 15:31:11,752 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12815, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14345, PETRI_PLACES=262, PETRI_TRANSITIONS=557} [2022-12-12 15:31:11,752 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 233 predicate places. [2022-12-12 15:31:11,752 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 557 transitions, 14345 flow [2022-12-12 15:31:11,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:31:11,753 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:31:11,753 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:31:11,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-12 15:31:11,753 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:31:11,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:31:11,753 INFO L85 PathProgramCache]: Analyzing trace with hash 165811196, now seen corresponding path program 8 times [2022-12-12 15:31:11,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:31:11,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337092460] [2022-12-12 15:31:11,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:31:11,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:31:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:31:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:31:11,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:31:11,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337092460] [2022-12-12 15:31:11,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337092460] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:31:11,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957700456] [2022-12-12 15:31:11,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:31:11,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:31:11,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:31:11,891 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 15:31:11,892 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 15:31:11,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:31:11,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:31:11,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-12 15:31:11,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:31:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:31:12,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:31:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:31:18,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957700456] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:31:18,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:31:18,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2022-12-12 15:31:18,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104665886] [2022-12-12 15:31:18,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:31:18,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-12 15:31:18,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:31:18,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-12 15:31:18,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=177, Unknown=3, NotChecked=0, Total=240 [2022-12-12 15:31:18,299 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:31:18,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 557 transitions, 14345 flow. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:31:18,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:31:18,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:31:18,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:31:20,378 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 15:31:22,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:31:24,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:31:26,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:31:28,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:31:30,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:31:32,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:31:34,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:31:36,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:31:38,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:31:40,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:31:42,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:31:44,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:31:47,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:31:49,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:31:51,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:31:53,165 WARN L539 Checker$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 15:31:55,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:31:57,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:31:59,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:32:01,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:32:03,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:32:05,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:32:07,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:32:09,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:32:11,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:32:13,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:32:17,231 INFO L130 PetriNetUnfolder]: 9911/15903 cut-off events. [2022-12-12 15:32:17,231 INFO L131 PetriNetUnfolder]: For 611119/611119 co-relation queries the response was YES. [2022-12-12 15:32:17,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158678 conditions, 15903 events. 9911/15903 cut-off events. For 611119/611119 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 113413 event pairs, 3255 based on Foata normal form. 34/15937 useless extension candidates. Maximal degree in co-relation 157906. Up to 13512 conditions per place. [2022-12-12 15:32:17,404 INFO L137 encePairwiseOnDemand]: 11/22 looper letters, 592 selfloop transitions, 303 changer transitions 1/896 dead transitions. [2022-12-12 15:32:17,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 896 transitions, 23114 flow [2022-12-12 15:32:17,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 15:32:17,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 15:32:17,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 166 transitions. [2022-12-12 15:32:17,405 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2022-12-12 15:32:17,406 INFO L175 Difference]: Start difference. First operand has 262 places, 557 transitions, 14345 flow. Second operand 16 states and 166 transitions. [2022-12-12 15:32:17,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 896 transitions, 23114 flow [2022-12-12 15:32:20,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 896 transitions, 22675 flow, removed 121 selfloop flow, removed 2 redundant places. [2022-12-12 15:32:20,700 INFO L231 Difference]: Finished difference. Result has 283 places, 765 transitions, 20401 flow [2022-12-12 15:32:20,700 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=14024, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=20401, PETRI_PLACES=283, PETRI_TRANSITIONS=765} [2022-12-12 15:32:20,701 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 254 predicate places. [2022-12-12 15:32:20,701 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 765 transitions, 20401 flow [2022-12-12 15:32:20,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:32:20,701 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:32:20,701 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:32:20,705 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 15:32:20,902 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,SelfDestructingSolverStorable23 [2022-12-12 15:32:20,903 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:32:20,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:32:20,903 INFO L85 PathProgramCache]: Analyzing trace with hash 588356174, now seen corresponding path program 13 times [2022-12-12 15:32:20,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:32:20,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061034034] [2022-12-12 15:32:20,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:32:20,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:32:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:32:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:32:21,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:32:21,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061034034] [2022-12-12 15:32:21,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061034034] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:32:21,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:32:21,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-12 15:32:21,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937079057] [2022-12-12 15:32:21,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:32:21,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 15:32:21,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:32:21,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 15:32:21,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-12 15:32:21,017 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:32:21,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 765 transitions, 20401 flow. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:32:21,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:32:21,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:32:21,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:32:25,019 INFO L130 PetriNetUnfolder]: 9772/15703 cut-off events. [2022-12-12 15:32:25,019 INFO L131 PetriNetUnfolder]: For 633875/633875 co-relation queries the response was YES. [2022-12-12 15:32:25,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167326 conditions, 15703 events. 9772/15703 cut-off events. For 633875/633875 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 111259 event pairs, 3078 based on Foata normal form. 87/15790 useless extension candidates. Maximal degree in co-relation 166714. Up to 8124 conditions per place. [2022-12-12 15:32:25,285 INFO L137 encePairwiseOnDemand]: 14/22 looper letters, 552 selfloop transitions, 305 changer transitions 9/866 dead transitions. [2022-12-12 15:32:25,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 866 transitions, 23687 flow [2022-12-12 15:32:25,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 15:32:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 15:32:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2022-12-12 15:32:25,286 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.512987012987013 [2022-12-12 15:32:25,286 INFO L175 Difference]: Start difference. First operand has 283 places, 765 transitions, 20401 flow. Second operand 7 states and 79 transitions. [2022-12-12 15:32:25,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 866 transitions, 23687 flow [2022-12-12 15:32:29,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 866 transitions, 22687 flow, removed 500 selfloop flow, removed 0 redundant places. [2022-12-12 15:32:29,263 INFO L231 Difference]: Finished difference. Result has 293 places, 777 transitions, 20599 flow [2022-12-12 15:32:29,264 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=19465, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=20599, PETRI_PLACES=293, PETRI_TRANSITIONS=777} [2022-12-12 15:32:29,264 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 264 predicate places. [2022-12-12 15:32:29,264 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 777 transitions, 20599 flow [2022-12-12 15:32:29,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:32:29,265 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:32:29,265 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:32:29,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-12 15:32:29,265 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:32:29,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:32:29,265 INFO L85 PathProgramCache]: Analyzing trace with hash 79968446, now seen corresponding path program 9 times [2022-12-12 15:32:29,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:32:29,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326379414] [2022-12-12 15:32:29,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:32:29,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:32:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:32:29,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:32:29,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:32:29,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326379414] [2022-12-12 15:32:29,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326379414] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:32:29,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755976086] [2022-12-12 15:32:29,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:32:29,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:32:29,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:32:29,379 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 15:32:29,382 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 15:32:29,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 15:32:29,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:32:29,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-12 15:32:29,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:32:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:32:29,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:32:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:32:43,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755976086] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:32:43,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:32:43,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2022-12-12 15:32:43,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233069344] [2022-12-12 15:32:43,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:32:43,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 15:32:43,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:32:43,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 15:32:43,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=148, Unknown=6, NotChecked=0, Total=210 [2022-12-12 15:32:43,134 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:32:43,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 777 transitions, 20599 flow. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:32:43,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:32:43,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:32:43,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:32:45,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:32:47,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:32:49,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:32:51,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:32:53,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:32:55,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:32:57,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:32:59,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:01,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:03,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:05,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:07,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:09,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:11,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:13,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:15,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:17,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:19,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:21,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:23,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:26,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:28,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:30,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:32,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:34,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:36,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:38,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:40,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:42,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:44,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:46,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:50,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:52,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:54,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:56,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:33:58,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:34:00,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:34:02,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:34:04,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:34:06,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:34:09,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:34:11,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:34:13,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:34:15,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:34:17,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:34:19,484 WARN L837 $PredicateComparison]: unable to prove that (and (<= (div (+ c_~b~0 c_~a~0) 4294967296) (div (+ (- 1) c_~b~0 c_~a~0) 4294967296)) (forall ((aux_mod_~b~0_21 Int)) (let ((.cse0 (* 4294967295 aux_mod_~b~0_21))) (or (> 0 aux_mod_~b~0_21) (< .cse0 (+ (* (div (+ (- 1) .cse0 (- (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296))) 4294967296) 4294967296) 4294967296)) (< .cse0 (+ (mod c_thread1Thread1of1ForFork1_~i~0 4294967296) (* (div .cse0 4294967296) 4294967296) 1)) (< (mod c_thread2Thread1of1ForFork2_~i~1 4294967296) aux_mod_~b~0_21))))) is different from false [2022-12-12 15:34:22,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:34:24,518 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 15:34:29,029 INFO L130 PetriNetUnfolder]: 11776/19071 cut-off events. [2022-12-12 15:34:29,029 INFO L131 PetriNetUnfolder]: For 712613/712613 co-relation queries the response was YES. [2022-12-12 15:34:29,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195647 conditions, 19071 events. 11776/19071 cut-off events. For 712613/712613 co-relation queries the response was YES. Maximal size of possible extension queue 1166. Compared 141558 event pairs, 3017 based on Foata normal form. 40/19107 useless extension candidates. Maximal degree in co-relation 194962. Up to 11031 conditions per place. [2022-12-12 15:34:29,282 INFO L137 encePairwiseOnDemand]: 10/22 looper letters, 568 selfloop transitions, 613 changer transitions 4/1185 dead transitions. [2022-12-12 15:34:29,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 1185 transitions, 30022 flow [2022-12-12 15:34:29,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 15:34:29,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 15:34:29,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 236 transitions. [2022-12-12 15:34:29,283 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5108225108225108 [2022-12-12 15:34:29,283 INFO L175 Difference]: Start difference. First operand has 293 places, 777 transitions, 20599 flow. Second operand 21 states and 236 transitions. [2022-12-12 15:34:29,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 1185 transitions, 30022 flow [2022-12-12 15:34:33,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 1185 transitions, 29358 flow, removed 85 selfloop flow, removed 3 redundant places. [2022-12-12 15:34:33,863 INFO L231 Difference]: Finished difference. Result has 326 places, 970 transitions, 26678 flow [2022-12-12 15:34:33,864 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=20032, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=456, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=26678, PETRI_PLACES=326, PETRI_TRANSITIONS=970} [2022-12-12 15:34:33,864 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 297 predicate places. [2022-12-12 15:34:33,864 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 970 transitions, 26678 flow [2022-12-12 15:34:33,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:34:33,864 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:34:33,865 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:34:33,872 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 15:34:34,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:34:34,072 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:34:34,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:34:34,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1947286896, now seen corresponding path program 10 times [2022-12-12 15:34:34,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:34:34,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219928500] [2022-12-12 15:34:34,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:34:34,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:34:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:34:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:34:34,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:34:34,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219928500] [2022-12-12 15:34:34,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219928500] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:34:34,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558105298] [2022-12-12 15:34:34,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 15:34:34,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:34:34,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:34:34,167 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 15:34:34,174 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 15:34:34,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 15:34:34,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:34:34,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-12 15:34:34,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:34:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:34:34,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:34:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:34:34,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558105298] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:34:34,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:34:34,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 18 [2022-12-12 15:34:34,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761132453] [2022-12-12 15:34:34,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:34:34,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 15:34:34,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:34:34,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 15:34:34,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-12-12 15:34:34,559 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:34:34,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 970 transitions, 26678 flow. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:34:34,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:34:34,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:34:34,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:34:43,588 INFO L130 PetriNetUnfolder]: 15527/25061 cut-off events. [2022-12-12 15:34:43,589 INFO L131 PetriNetUnfolder]: For 1072554/1072554 co-relation queries the response was YES. [2022-12-12 15:34:43,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278130 conditions, 25061 events. 15527/25061 cut-off events. For 1072554/1072554 co-relation queries the response was YES. Maximal size of possible extension queue 1538. Compared 193429 event pairs, 1735 based on Foata normal form. 120/25177 useless extension candidates. Maximal degree in co-relation 277511. Up to 8161 conditions per place. [2022-12-12 15:34:44,056 INFO L137 encePairwiseOnDemand]: 12/22 looper letters, 781 selfloop transitions, 954 changer transitions 3/1738 dead transitions. [2022-12-12 15:34:44,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 1738 transitions, 43791 flow [2022-12-12 15:34:44,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-12 15:34:44,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-12 15:34:44,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 396 transitions. [2022-12-12 15:34:44,058 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2022-12-12 15:34:44,058 INFO L175 Difference]: Start difference. First operand has 326 places, 970 transitions, 26678 flow. Second operand 34 states and 396 transitions. [2022-12-12 15:34:44,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 1738 transitions, 43791 flow [2022-12-12 15:34:53,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 1738 transitions, 42411 flow, removed 654 selfloop flow, removed 2 redundant places. [2022-12-12 15:34:53,833 INFO L231 Difference]: Finished difference. Result has 381 places, 1264 transitions, 35967 flow [2022-12-12 15:34:53,834 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=25852, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=968, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=697, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=35967, PETRI_PLACES=381, PETRI_TRANSITIONS=1264} [2022-12-12 15:34:53,835 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 352 predicate places. [2022-12-12 15:34:53,835 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 1264 transitions, 35967 flow [2022-12-12 15:34:53,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:34:53,835 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:34:53,835 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:34:53,843 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 15:34:54,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-12 15:34:54,039 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:34:54,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:34:54,039 INFO L85 PathProgramCache]: Analyzing trace with hash 114490780, now seen corresponding path program 11 times [2022-12-12 15:34:54,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:34:54,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472707003] [2022-12-12 15:34:54,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:34:54,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:34:54,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:34:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:34:54,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:34:54,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472707003] [2022-12-12 15:34:54,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472707003] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:34:54,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753236673] [2022-12-12 15:34:54,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 15:34:54,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:34:54,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:34:54,132 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 15:34:54,134 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 15:34:54,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:34:54,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:34:54,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-12 15:34:54,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:34:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:34:54,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:34:56,432 WARN L837 $PredicateComparison]: unable to prove that (forall ((aux_mod_~a~0_21 Int)) (or (>= aux_mod_~a~0_21 4294967296) (<= aux_mod_~a~0_21 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (let ((.cse0 (* 4294967295 aux_mod_~a~0_21))) (< (+ (* 4294967296 (div .cse0 4294967296)) (mod c_thread2Thread1of1ForFork2_~i~1 4294967296)) .cse0)))) is different from false [2022-12-12 15:34:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-12 15:34:56,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753236673] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:34:56,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:34:56,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 12 [2022-12-12 15:34:56,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344784814] [2022-12-12 15:34:56,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:34:56,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 15:34:56,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:34:56,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 15:34:56,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=82, Unknown=1, NotChecked=18, Total=132 [2022-12-12 15:34:56,441 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:34:56,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 1264 transitions, 35967 flow. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 15:34:56,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:34:56,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:34:56,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:34:59,580 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((aux_mod_~a~0_21 Int)) (or (>= aux_mod_~a~0_21 4294967296) (<= aux_mod_~a~0_21 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (let ((.cse0 (* 4294967295 aux_mod_~a~0_21))) (< (+ (* 4294967296 (div .cse0 4294967296)) (mod c_thread2Thread1of1ForFork2_~i~1 4294967296)) .cse0)))) (<= (div (+ c_~b~0 c_~a~0) 4294967296) (div (+ (- 1) c_~b~0 c_~a~0) 4294967296))) is different from false [2022-12-12 15:35:11,225 INFO L130 PetriNetUnfolder]: 18268/29372 cut-off events. [2022-12-12 15:35:11,225 INFO L131 PetriNetUnfolder]: For 1440438/1440438 co-relation queries the response was YES. [2022-12-12 15:35:11,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342083 conditions, 29372 events. 18268/29372 cut-off events. For 1440438/1440438 co-relation queries the response was YES. Maximal size of possible extension queue 1812. Compared 230129 event pairs, 4290 based on Foata normal form. 44/29416 useless extension candidates. Maximal degree in co-relation 341474. Up to 9899 conditions per place. [2022-12-12 15:35:11,921 INFO L137 encePairwiseOnDemand]: 8/22 looper letters, 874 selfloop transitions, 872 changer transitions 0/1746 dead transitions. [2022-12-12 15:35:11,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 1746 transitions, 49312 flow [2022-12-12 15:35:11,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 15:35:11,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 15:35:11,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 213 transitions. [2022-12-12 15:35:11,923 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.56951871657754 [2022-12-12 15:35:11,923 INFO L175 Difference]: Start difference. First operand has 381 places, 1264 transitions, 35967 flow. Second operand 17 states and 213 transitions. [2022-12-12 15:35:11,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 1746 transitions, 49312 flow [2022-12-12 15:35:24,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 1746 transitions, 45875 flow, removed 658 selfloop flow, removed 9 redundant places. [2022-12-12 15:35:24,511 INFO L231 Difference]: Finished difference. Result has 398 places, 1437 transitions, 40900 flow [2022-12-12 15:35:24,512 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=33277, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=704, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=40900, PETRI_PLACES=398, PETRI_TRANSITIONS=1437} [2022-12-12 15:35:24,513 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 369 predicate places. [2022-12-12 15:35:24,513 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 1437 transitions, 40900 flow [2022-12-12 15:35:24,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 15:35:24,513 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:35:24,513 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:35:24,517 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 15:35:24,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-12 15:35:24,717 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:35:24,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:35:24,718 INFO L85 PathProgramCache]: Analyzing trace with hash -942997332, now seen corresponding path program 14 times [2022-12-12 15:35:24,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:35:24,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046753886] [2022-12-12 15:35:24,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:35:24,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:35:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:35:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:35:24,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:35:24,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046753886] [2022-12-12 15:35:24,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046753886] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:35:24,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079451108] [2022-12-12 15:35:24,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:35:24,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:35:24,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:35:24,824 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 15:35:24,826 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 15:35:24,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:35:24,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:35:24,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-12 15:35:24,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:35:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:35:24,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:35:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:35:25,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079451108] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:35:25,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:35:25,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-12 15:35:25,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870200901] [2022-12-12 15:35:25,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:35:25,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 15:35:25,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:35:25,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 15:35:25,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-12-12 15:35:25,040 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:35:25,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 1437 transitions, 40900 flow. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:35:25,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:35:25,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:35:25,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:35:37,876 INFO L130 PetriNetUnfolder]: 18321/29473 cut-off events. [2022-12-12 15:35:37,876 INFO L131 PetriNetUnfolder]: For 1402938/1402938 co-relation queries the response was YES. [2022-12-12 15:35:38,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349030 conditions, 29473 events. 18321/29473 cut-off events. For 1402938/1402938 co-relation queries the response was YES. Maximal size of possible extension queue 1822. Compared 231300 event pairs, 5888 based on Foata normal form. 60/29533 useless extension candidates. Maximal degree in co-relation 348183. Up to 20994 conditions per place. [2022-12-12 15:35:38,600 INFO L137 encePairwiseOnDemand]: 14/22 looper letters, 1204 selfloop transitions, 326 changer transitions 0/1530 dead transitions. [2022-12-12 15:35:38,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 1530 transitions, 45490 flow [2022-12-12 15:35:38,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 15:35:38,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 15:35:38,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2022-12-12 15:35:38,601 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6038961038961039 [2022-12-12 15:35:38,601 INFO L175 Difference]: Start difference. First operand has 398 places, 1437 transitions, 40900 flow. Second operand 7 states and 93 transitions. [2022-12-12 15:35:38,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 1530 transitions, 45490 flow [2022-12-12 15:35:51,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 1530 transitions, 44317 flow, removed 193 selfloop flow, removed 4 redundant places. [2022-12-12 15:35:51,275 INFO L231 Difference]: Finished difference. Result has 403 places, 1446 transitions, 40896 flow [2022-12-12 15:35:51,277 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=39738, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=40896, PETRI_PLACES=403, PETRI_TRANSITIONS=1446} [2022-12-12 15:35:51,278 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 374 predicate places. [2022-12-12 15:35:51,278 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 1446 transitions, 40896 flow [2022-12-12 15:35:51,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:35:51,278 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:35:51,278 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:35:51,283 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 15:35:51,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-12 15:35:51,483 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:35:51,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:35:51,483 INFO L85 PathProgramCache]: Analyzing trace with hash -594822940, now seen corresponding path program 12 times [2022-12-12 15:35:51,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:35:51,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717375317] [2022-12-12 15:35:51,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:35:51,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:35:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:35:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:35:51,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:35:51,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717375317] [2022-12-12 15:35:51,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717375317] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:35:51,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384182715] [2022-12-12 15:35:51,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 15:35:51,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:35:51,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:35:51,597 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 15:35:51,598 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 15:35:51,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 15:35:51,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:35:51,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-12 15:35:51,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:35:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:35:51,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:35:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:35:57,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384182715] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:35:57,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:35:57,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2022-12-12 15:35:57,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622597011] [2022-12-12 15:35:57,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:35:57,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-12 15:35:57,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:35:57,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-12 15:35:57,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=177, Unknown=3, NotChecked=0, Total=240 [2022-12-12 15:35:57,997 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:35:57,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 1446 transitions, 40896 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 15:35:57,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:35:57,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:35:57,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:36:00,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:02,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:04,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:06,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:08,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:10,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:12,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:14,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:16,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:18,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:20,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:22,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:24,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:27,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:29,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:31,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:33,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:35,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:37,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:39,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:41,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:43,669 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (mod c_thread2Thread1of1ForFork2_~i~1 4294967296)) (.cse0 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296))) (and (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse1 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 .cse0) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse1) (< .cse1 0) (let ((.cse3 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ .cse2 (* (div .cse3 4294967296) 4294967296)) .cse3)) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))) (or (let ((.cse4 (* 4294967295 c_~a~0))) (< (+ .cse2 (* (div .cse4 4294967296) 4294967296)) .cse4)) (< .cse0 (mod c_~a~0 4294967296))))) is different from false [2022-12-12 15:36:45,685 WARN L539 Checker$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 15:36:47,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:49,725 WARN L539 Checker$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 15:36:51,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:53,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:55,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:36:58,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:37:00,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:37:02,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:37:04,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:37:06,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:37:08,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:37:10,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:37:12,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:37:41,216 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_thread2Thread1of1ForFork2_~i~1 4294967296))) (and (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse0 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse0) (< .cse0 0) (let ((.cse2 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ .cse1 (* (div .cse2 4294967296) 4294967296)) .cse2)) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))) (let ((.cse3 (* 4294967295 c_~a~0))) (< (+ (* (div (+ .cse3 (mod c_thread3Thread1of1ForFork0_~i~2 4294967296)) 4294967296) 4294967296) .cse1) .cse3)))) is different from false [2022-12-12 15:37:45,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:37:47,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:37:49,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:37:51,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:37:53,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:37:55,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:37:57,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:37:59,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:01,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:03,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:05,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:07,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:09,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:11,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:20,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:22,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:24,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:26,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:28,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:30,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:32,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:34,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:38,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:40,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:42,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:44,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:46,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:51,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:53,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:55,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:38:57,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:39:01,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:39:03,476 WARN L539 Checker$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 15:39:05,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:39:09,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:39:11,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:39:13,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:39:15,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:39:17,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:39:19,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:39:21,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:39:23,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:39:25,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-12 15:39:27,225 INFO L130 PetriNetUnfolder]: 22392/36090 cut-off events. [2022-12-12 15:39:27,225 INFO L131 PetriNetUnfolder]: For 1661199/1661199 co-relation queries the response was YES. [2022-12-12 15:39:28,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420288 conditions, 36090 events. 22392/36090 cut-off events. For 1661199/1661199 co-relation queries the response was YES. Maximal size of possible extension queue 2141. Compared 291103 event pairs, 5897 based on Foata normal form. 68/36158 useless extension candidates. Maximal degree in co-relation 419734. Up to 15354 conditions per place. [2022-12-12 15:39:28,471 INFO L137 encePairwiseOnDemand]: 6/22 looper letters, 1238 selfloop transitions, 771 changer transitions 0/2009 dead transitions. [2022-12-12 15:39:28,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 2009 transitions, 56020 flow [2022-12-12 15:39:28,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-12 15:39:28,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-12 15:39:28,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 261 transitions. [2022-12-12 15:39:28,487 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5392561983471075 [2022-12-12 15:39:28,487 INFO L175 Difference]: Start difference. First operand has 403 places, 1446 transitions, 40896 flow. Second operand 22 states and 261 transitions. [2022-12-12 15:39:28,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 2009 transitions, 56020 flow [2022-12-12 15:39:43,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 2009 transitions, 55544 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-12-12 15:39:43,103 INFO L231 Difference]: Finished difference. Result has 437 places, 1666 transitions, 48655 flow [2022-12-12 15:39:43,104 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=40420, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=600, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=765, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=48655, PETRI_PLACES=437, PETRI_TRANSITIONS=1666} [2022-12-12 15:39:43,113 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 408 predicate places. [2022-12-12 15:39:43,113 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 1666 transitions, 48655 flow [2022-12-12 15:39:43,113 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 15:39:43,113 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:39:43,113 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:39:43,120 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 15:39:43,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:39:43,318 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:39:43,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:39:43,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1648535423, now seen corresponding path program 4 times [2022-12-12 15:39:43,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:39:43,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959843354] [2022-12-12 15:39:43,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:39:43,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:39:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:39:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:39:43,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:39:43,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959843354] [2022-12-12 15:39:43,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959843354] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:39:43,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068877108] [2022-12-12 15:39:43,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 15:39:43,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:39:43,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:39:43,421 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 15:39:43,440 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 15:39:43,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 15:39:43,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:39:43,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-12 15:39:43,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:39:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:39:43,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:39:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:39:43,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068877108] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:39:43,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:39:43,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-12-12 15:39:43,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326293248] [2022-12-12 15:39:43,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:39:43,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 15:39:43,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:39:43,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 15:39:43,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-12-12 15:39:43,768 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:39:43,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 1666 transitions, 48655 flow. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:39:43,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:39:43,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:39:43,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:40:01,390 INFO L130 PetriNetUnfolder]: 22394/36086 cut-off events. [2022-12-12 15:40:01,390 INFO L131 PetriNetUnfolder]: For 1873599/1873599 co-relation queries the response was YES. [2022-12-12 15:40:02,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459040 conditions, 36086 events. 22394/36086 cut-off events. For 1873599/1873599 co-relation queries the response was YES. Maximal size of possible extension queue 2153. Compared 291277 event pairs, 4919 based on Foata normal form. 8/36094 useless extension candidates. Maximal degree in co-relation 458693. Up to 27439 conditions per place. [2022-12-12 15:40:02,711 INFO L137 encePairwiseOnDemand]: 13/22 looper letters, 1456 selfloop transitions, 306 changer transitions 0/1762 dead transitions. [2022-12-12 15:40:02,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 1762 transitions, 53672 flow [2022-12-12 15:40:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 15:40:02,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 15:40:02,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2022-12-12 15:40:02,712 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2022-12-12 15:40:02,712 INFO L175 Difference]: Start difference. First operand has 437 places, 1666 transitions, 48655 flow. Second operand 9 states and 102 transitions. [2022-12-12 15:40:02,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 1762 transitions, 53672 flow [2022-12-12 15:40:24,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1762 transitions, 52701 flow, removed 447 selfloop flow, removed 3 redundant places. [2022-12-12 15:40:24,062 INFO L231 Difference]: Finished difference. Result has 442 places, 1668 transitions, 48372 flow [2022-12-12 15:40:24,063 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=47665, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=303, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=48372, PETRI_PLACES=442, PETRI_TRANSITIONS=1668} [2022-12-12 15:40:24,064 INFO L295 CegarLoopForPetriNet]: 29 programPoint places, 413 predicate places. [2022-12-12 15:40:24,064 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 1668 transitions, 48372 flow [2022-12-12 15:40:24,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:40:24,064 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:40:24,064 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:40:24,071 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 15:40:24,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:40:24,268 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 15:40:24,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:40:24,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1942790542, now seen corresponding path program 13 times [2022-12-12 15:40:24,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:40:24,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742048816] [2022-12-12 15:40:24,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:40:24,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:40:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:40:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:40:24,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:40:24,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742048816] [2022-12-12 15:40:24,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742048816] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:40:24,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:40:24,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-12 15:40:24,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700265304] [2022-12-12 15:40:24,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:40:24,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 15:40:24,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:40:24,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 15:40:24,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-12 15:40:24,350 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-12 15:40:24,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 1668 transitions, 48372 flow. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:40:24,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:40:24,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-12 15:40:24,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand