/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/chl-chromosome-trans.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 15:17:10,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 15:17:10,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 15:17:10,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 15:17:10,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 15:17:10,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 15:17:10,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 15:17:10,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 15:17:10,990 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 15:17:10,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 15:17:10,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 15:17:10,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 15:17:10,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 15:17:10,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 15:17:10,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 15:17:10,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 15:17:10,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 15:17:10,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 15:17:10,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 15:17:10,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 15:17:10,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 15:17:11,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 15:17:11,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 15:17:11,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 15:17:11,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 15:17:11,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 15:17:11,003 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 15:17:11,004 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 15:17:11,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 15:17:11,004 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 15:17:11,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 15:17:11,005 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 15:17:11,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 15:17:11,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 15:17:11,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 15:17:11,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 15:17:11,007 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 15:17:11,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 15:17:11,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 15:17:11,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 15:17:11,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 15:17:11,009 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 15:17:11,030 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 15:17:11,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 15:17:11,032 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 15:17:11,032 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 15:17:11,033 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 15:17:11,033 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 15:17:11,033 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 15:17:11,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 15:17:11,062 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 15:17:11,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 15:17:11,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 15:17:11,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 15:17:11,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 15:17:11,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 15:17:11,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 15:17:11,063 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 15:17:11,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 15:17:11,063 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 15:17:11,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 15:17:11,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 15:17:11,064 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 15:17:11,064 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 15:17:11,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 15:17:11,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 15:17:11,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 15:17:11,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 15:17:11,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 15:17:11,065 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 15:17:11,065 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 15:17:11,065 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 15:17:11,065 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-12 15:17:11,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 15:17:11,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 15:17:11,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 15:17:11,302 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 15:17:11,302 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 15:17:11,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2022-12-12 15:17:12,188 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 15:17:12,378 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 15:17:12,379 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2022-12-12 15:17:12,385 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b72387f58/8b255e85f9174ef2bef30d3e5a74d76c/FLAG6d5ed8b9b [2022-12-12 15:17:12,393 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b72387f58/8b255e85f9174ef2bef30d3e5a74d76c [2022-12-12 15:17:12,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 15:17:12,396 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 15:17:12,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 15:17:12,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 15:17:12,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 15:17:12,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 03:17:12" (1/1) ... [2022-12-12 15:17:12,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f405fbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:17:12, skipping insertion in model container [2022-12-12 15:17:12,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 03:17:12" (1/1) ... [2022-12-12 15:17:12,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 15:17:12,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 15:17:12,585 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/chl-chromosome-trans.wvr.c[3034,3047] [2022-12-12 15:17:12,593 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 15:17:12,599 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 15:17:12,624 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/chl-chromosome-trans.wvr.c[3034,3047] [2022-12-12 15:17:12,626 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 15:17:12,638 INFO L208 MainTranslator]: Completed translation [2022-12-12 15:17:12,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:17:12 WrapperNode [2022-12-12 15:17:12,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 15:17:12,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 15:17:12,640 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 15:17:12,640 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 15:17:12,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:17:12" (1/1) ... [2022-12-12 15:17:12,662 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:17:12" (1/1) ... [2022-12-12 15:17:12,694 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 271 [2022-12-12 15:17:12,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 15:17:12,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 15:17:12,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 15:17:12,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 15:17:12,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:17:12" (1/1) ... [2022-12-12 15:17:12,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:17:12" (1/1) ... [2022-12-12 15:17:12,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:17:12" (1/1) ... [2022-12-12 15:17:12,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:17:12" (1/1) ... [2022-12-12 15:17:12,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:17:12" (1/1) ... [2022-12-12 15:17:12,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:17:12" (1/1) ... [2022-12-12 15:17:12,740 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:17:12" (1/1) ... [2022-12-12 15:17:12,741 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:17:12" (1/1) ... [2022-12-12 15:17:12,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 15:17:12,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 15:17:12,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 15:17:12,746 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 15:17:12,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:17:12" (1/1) ... [2022-12-12 15:17:12,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 15:17:12,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:17:12,797 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 15:17:12,811 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 15:17:12,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 15:17:12,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 15:17:12,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 15:17:12,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 15:17:12,845 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 15:17:12,845 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 15:17:12,845 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 15:17:12,845 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 15:17:12,845 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-12 15:17:12,845 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-12 15:17:12,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 15:17:12,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 15:17:12,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 15:17:12,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 15:17:12,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 15:17:12,847 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 15:17:12,921 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 15:17:12,922 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 15:17:13,284 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 15:17:13,304 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 15:17:13,304 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-12 15:17:13,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 03:17:13 BoogieIcfgContainer [2022-12-12 15:17:13,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 15:17:13,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 15:17:13,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 15:17:13,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 15:17:13,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 03:17:12" (1/3) ... [2022-12-12 15:17:13,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6d633c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 03:17:13, skipping insertion in model container [2022-12-12 15:17:13,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 03:17:12" (2/3) ... [2022-12-12 15:17:13,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6d633c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 03:17:13, skipping insertion in model container [2022-12-12 15:17:13,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 03:17:13" (3/3) ... [2022-12-12 15:17:13,313 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2022-12-12 15:17:13,326 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 15:17:13,326 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 15:17:13,326 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 15:17:13,441 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-12 15:17:13,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 312 transitions, 648 flow [2022-12-12 15:17:13,626 INFO L130 PetriNetUnfolder]: 28/309 cut-off events. [2022-12-12 15:17:13,626 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 15:17:13,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 309 events. 28/309 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 479 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 238. Up to 2 conditions per place. [2022-12-12 15:17:13,635 INFO L82 GeneralOperation]: Start removeDead. Operand has 294 places, 312 transitions, 648 flow [2022-12-12 15:17:13,640 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 281 places, 299 transitions, 616 flow [2022-12-12 15:17:13,641 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 15:17:13,661 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 281 places, 299 transitions, 616 flow [2022-12-12 15:17:13,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 299 transitions, 616 flow [2022-12-12 15:17:13,716 INFO L130 PetriNetUnfolder]: 28/299 cut-off events. [2022-12-12 15:17:13,716 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 15:17:13,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 299 events. 28/299 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 477 event pairs, 0 based on Foata normal form. 0/271 useless extension candidates. Maximal degree in co-relation 238. Up to 2 conditions per place. [2022-12-12 15:17:13,732 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 281 places, 299 transitions, 616 flow [2022-12-12 15:17:13,732 INFO L226 LiptonReduction]: Number of co-enabled transitions 15390 [2022-12-12 15:17:21,340 INFO L241 LiptonReduction]: Total number of compositions: 269 [2022-12-12 15:17:21,357 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 15:17:21,362 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;@760e67eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 15:17:21,363 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-12 15:17:21,372 INFO L130 PetriNetUnfolder]: 6/29 cut-off events. [2022-12-12 15:17:21,373 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 15:17:21,373 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:17:21,373 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:17:21,374 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 15:17:21,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:17:21,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1502034649, now seen corresponding path program 1 times [2022-12-12 15:17:21,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:17:21,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464779029] [2022-12-12 15:17:21,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:17:21,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:17:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:17:21,712 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 15:17:21,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:17:21,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464779029] [2022-12-12 15:17:21,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464779029] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:17:21,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:17:21,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 15:17:21,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106485812] [2022-12-12 15:17:21,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:17:21,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 15:17:21,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:17:21,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 15:17:21,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 15:17:21,732 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 30 [2022-12-12 15:17:21,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states 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 15:17:21,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:17:21,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 30 [2022-12-12 15:17:21,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:17:21,849 INFO L130 PetriNetUnfolder]: 370/545 cut-off events. [2022-12-12 15:17:21,849 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-12-12 15:17:21,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 545 events. 370/545 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1540 event pairs, 253 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 936. Up to 543 conditions per place. [2022-12-12 15:17:21,853 INFO L137 encePairwiseOnDemand]: 23/30 looper letters, 27 selfloop transitions, 6 changer transitions 0/33 dead transitions. [2022-12-12 15:17:21,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 150 flow [2022-12-12 15:17:21,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 15:17:21,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 15:17:21,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 36 transitions. [2022-12-12 15:17:21,860 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4 [2022-12-12 15:17:21,861 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 78 flow. Second operand 3 states and 36 transitions. [2022-12-12 15:17:21,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 150 flow [2022-12-12 15:17:21,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 138 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-12 15:17:21,865 INFO L231 Difference]: Finished difference. Result has 31 places, 33 transitions, 98 flow [2022-12-12 15:17:21,866 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=31, PETRI_TRANSITIONS=33} [2022-12-12 15:17:21,868 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2022-12-12 15:17:21,868 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 33 transitions, 98 flow [2022-12-12 15:17:21,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states 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 15:17:21,869 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:17:21,869 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:17:21,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 15:17:21,869 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 15:17:21,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:17:21,869 INFO L85 PathProgramCache]: Analyzing trace with hash 145490352, now seen corresponding path program 1 times [2022-12-12 15:17:21,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:17:21,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60051717] [2022-12-12 15:17:21,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:17:21,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:17:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:17:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:17:21,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:17:21,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60051717] [2022-12-12 15:17:21,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60051717] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:17:21,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742578733] [2022-12-12 15:17:21,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:17:21,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:17:21,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:17:21,968 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 15:17:22,001 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 15:17:22,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:17:22,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-12 15:17:22,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:17:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:17:22,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:17:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 15:17:22,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742578733] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:17:22,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:17:22,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-12-12 15:17:22,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574238189] [2022-12-12 15:17:22,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:17:22,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 15:17:22,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:17:22,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 15:17:22,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-12-12 15:17:22,145 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 30 [2022-12-12 15:17:22,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 33 transitions, 98 flow. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:17:22,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:17:22,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 30 [2022-12-12 15:17:22,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:17:22,254 INFO L130 PetriNetUnfolder]: 370/554 cut-off events. [2022-12-12 15:17:22,254 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-12 15:17:22,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1155 conditions, 554 events. 370/554 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1540 event pairs, 253 based on Foata normal form. 6/445 useless extension candidates. Maximal degree in co-relation 1106. Up to 543 conditions per place. [2022-12-12 15:17:22,256 INFO L137 encePairwiseOnDemand]: 23/30 looper letters, 27 selfloop transitions, 15 changer transitions 0/42 dead transitions. [2022-12-12 15:17:22,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 42 transitions, 218 flow [2022-12-12 15:17:22,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 15:17:22,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 15:17:22,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 51 transitions. [2022-12-12 15:17:22,258 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2833333333333333 [2022-12-12 15:17:22,258 INFO L175 Difference]: Start difference. First operand has 31 places, 33 transitions, 98 flow. Second operand 6 states and 51 transitions. [2022-12-12 15:17:22,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 42 transitions, 218 flow [2022-12-12 15:17:22,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 42 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-12 15:17:22,259 INFO L231 Difference]: Finished difference. Result has 38 places, 42 transitions, 188 flow [2022-12-12 15:17:22,260 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=188, PETRI_PLACES=38, PETRI_TRANSITIONS=42} [2022-12-12 15:17:22,260 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2022-12-12 15:17:22,260 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 42 transitions, 188 flow [2022-12-12 15:17:22,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:17:22,260 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:17:22,261 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:17:22,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-12 15:17:22,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:17:22,466 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 15:17:22,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:17:22,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1480269539, now seen corresponding path program 2 times [2022-12-12 15:17:22,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:17:22,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123397365] [2022-12-12 15:17:22,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:17:22,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:17:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:17:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-12 15:17:22,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:17:22,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123397365] [2022-12-12 15:17:22,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123397365] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:17:22,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400548933] [2022-12-12 15:17:22,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:17:22,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:17:22,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:17:22,613 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 15:17:22,614 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 15:17:22,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-12 15:17:22,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:17:22,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 15:17:22,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:17:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 15:17:22,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 15:17:22,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400548933] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:17:22,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 15:17:22,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-12-12 15:17:22,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136458808] [2022-12-12 15:17:22,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:17:22,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 15:17:22,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:17:22,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 15:17:22,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-12 15:17:22,758 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 30 [2022-12-12 15:17:22,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 42 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 15:17:22,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:17:22,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 30 [2022-12-12 15:17:22,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:17:22,947 INFO L130 PetriNetUnfolder]: 644/962 cut-off events. [2022-12-12 15:17:22,947 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-12 15:17:22,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2016 conditions, 962 events. 644/962 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3469 event pairs, 253 based on Foata normal form. 14/762 useless extension candidates. Maximal degree in co-relation 1928. Up to 555 conditions per place. [2022-12-12 15:17:22,950 INFO L137 encePairwiseOnDemand]: 26/30 looper letters, 69 selfloop transitions, 3 changer transitions 2/74 dead transitions. [2022-12-12 15:17:22,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 74 transitions, 407 flow [2022-12-12 15:17:22,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 15:17:22,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 15:17:22,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2022-12-12 15:17:22,951 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.525 [2022-12-12 15:17:22,952 INFO L175 Difference]: Start difference. First operand has 38 places, 42 transitions, 188 flow. Second operand 4 states and 63 transitions. [2022-12-12 15:17:22,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 74 transitions, 407 flow [2022-12-12 15:17:22,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 74 transitions, 383 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-12 15:17:22,954 INFO L231 Difference]: Finished difference. Result has 42 places, 44 transitions, 184 flow [2022-12-12 15:17:22,954 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=42, PETRI_TRANSITIONS=44} [2022-12-12 15:17:22,954 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 8 predicate places. [2022-12-12 15:17:22,954 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 44 transitions, 184 flow [2022-12-12 15:17:22,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 15:17:22,955 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:17:22,955 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:17:22,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-12 15:17:23,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-12 15:17:23,159 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 15:17:23,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:17:23,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1749885689, now seen corresponding path program 3 times [2022-12-12 15:17:23,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:17:23,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675011566] [2022-12-12 15:17:23,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:17:23,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:17:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:17:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-12 15:17:23,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:17:23,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675011566] [2022-12-12 15:17:23,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675011566] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:17:23,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836511219] [2022-12-12 15:17:23,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:17:23,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:17:23,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:17:23,282 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 15:17:23,284 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 15:17:23,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-12 15:17:23,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:17:23,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-12 15:17:23,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:17:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 15:17:23,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 15:17:23,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836511219] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:17:23,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 15:17:23,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-12-12 15:17:23,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594077089] [2022-12-12 15:17:23,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:17:23,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 15:17:23,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:17:23,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 15:17:23,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-12 15:17:23,410 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 30 [2022-12-12 15:17:23,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 44 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 15:17:23,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:17:23,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 30 [2022-12-12 15:17:23,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:17:23,564 INFO L130 PetriNetUnfolder]: 758/1124 cut-off events. [2022-12-12 15:17:23,565 INFO L131 PetriNetUnfolder]: For 337/337 co-relation queries the response was YES. [2022-12-12 15:17:23,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2677 conditions, 1124 events. 758/1124 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4212 event pairs, 104 based on Foata normal form. 24/974 useless extension candidates. Maximal degree in co-relation 2598. Up to 775 conditions per place. [2022-12-12 15:17:23,569 INFO L137 encePairwiseOnDemand]: 24/30 looper letters, 63 selfloop transitions, 5 changer transitions 1/69 dead transitions. [2022-12-12 15:17:23,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 69 transitions, 392 flow [2022-12-12 15:17:23,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 15:17:23,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 15:17:23,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 54 transitions. [2022-12-12 15:17:23,570 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.45 [2022-12-12 15:17:23,570 INFO L175 Difference]: Start difference. First operand has 42 places, 44 transitions, 184 flow. Second operand 4 states and 54 transitions. [2022-12-12 15:17:23,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 69 transitions, 392 flow [2022-12-12 15:17:23,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 69 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-12 15:17:23,572 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 213 flow [2022-12-12 15:17:23,572 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2022-12-12 15:17:23,573 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 12 predicate places. [2022-12-12 15:17:23,573 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 213 flow [2022-12-12 15:17:23,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 15:17:23,573 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:17:23,573 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:17:23,580 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 15:17:23,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:17:23,778 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 15:17:23,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:17:23,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1349523709, now seen corresponding path program 4 times [2022-12-12 15:17:23,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:17:23,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615018232] [2022-12-12 15:17:23,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:17:23,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:17:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:17:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-12 15:17:23,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:17:23,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615018232] [2022-12-12 15:17:23,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615018232] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:17:23,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493432834] [2022-12-12 15:17:23,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 15:17:23,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:17:23,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:17:23,953 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 15:17:23,954 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 15:17:24,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 15:17:24,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:17:24,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 15:17:24,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:17:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-12 15:17:24,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:17:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-12 15:17:24,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493432834] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:17:24,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:17:24,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-12 15:17:24,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557181737] [2022-12-12 15:17:24,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:17:24,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 15:17:24,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:17:24,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 15:17:24,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-12-12 15:17:24,142 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 30 [2022-12-12 15:17:24,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 15:17:24,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:17:24,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 30 [2022-12-12 15:17:24,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:17:24,298 INFO L130 PetriNetUnfolder]: 758/1127 cut-off events. [2022-12-12 15:17:24,299 INFO L131 PetriNetUnfolder]: For 989/989 co-relation queries the response was YES. [2022-12-12 15:17:24,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2864 conditions, 1127 events. 758/1127 cut-off events. For 989/989 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3864 event pairs, 525 based on Foata normal form. 1/954 useless extension candidates. Maximal degree in co-relation 2770. Up to 1113 conditions per place. [2022-12-12 15:17:24,304 INFO L137 encePairwiseOnDemand]: 23/30 looper letters, 31 selfloop transitions, 18 changer transitions 0/49 dead transitions. [2022-12-12 15:17:24,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 329 flow [2022-12-12 15:17:24,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 15:17:24,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 15:17:24,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 48 transitions. [2022-12-12 15:17:24,305 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.22857142857142856 [2022-12-12 15:17:24,305 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 213 flow. Second operand 7 states and 48 transitions. [2022-12-12 15:17:24,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 329 flow [2022-12-12 15:17:24,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 49 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-12 15:17:24,308 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 278 flow [2022-12-12 15:17:24,308 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2022-12-12 15:17:24,309 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 18 predicate places. [2022-12-12 15:17:24,310 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 278 flow [2022-12-12 15:17:24,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 15:17:24,312 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:17:24,312 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:17:24,326 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 15:17:24,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:17:24,517 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 15:17:24,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:17:24,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1540289862, now seen corresponding path program 5 times [2022-12-12 15:17:24,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:17:24,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116613643] [2022-12-12 15:17:24,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:17:24,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:17:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:17:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:17:24,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:17:24,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116613643] [2022-12-12 15:17:24,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116613643] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:17:24,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:17:24,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 15:17:24,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618004367] [2022-12-12 15:17:24,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:17:24,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 15:17:24,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:17:24,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 15:17:24,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-12 15:17:24,787 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 30 [2022-12-12 15:17:24,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 278 flow. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 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 15:17:24,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:17:24,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 30 [2022-12-12 15:17:24,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:17:25,010 INFO L130 PetriNetUnfolder]: 1162/1709 cut-off events. [2022-12-12 15:17:25,010 INFO L131 PetriNetUnfolder]: For 1214/1214 co-relation queries the response was YES. [2022-12-12 15:17:25,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4301 conditions, 1709 events. 1162/1709 cut-off events. For 1214/1214 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6685 event pairs, 338 based on Foata normal form. 2/1407 useless extension candidates. Maximal degree in co-relation 4187. Up to 1100 conditions per place. [2022-12-12 15:17:25,016 INFO L137 encePairwiseOnDemand]: 24/30 looper letters, 69 selfloop transitions, 6 changer transitions 2/77 dead transitions. [2022-12-12 15:17:25,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 77 transitions, 535 flow [2022-12-12 15:17:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 15:17:25,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 15:17:25,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 55 transitions. [2022-12-12 15:17:25,017 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2022-12-12 15:17:25,017 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 278 flow. Second operand 4 states and 55 transitions. [2022-12-12 15:17:25,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 77 transitions, 535 flow [2022-12-12 15:17:25,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 77 transitions, 499 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-12-12 15:17:25,019 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 285 flow [2022-12-12 15:17:25,020 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2022-12-12 15:17:25,020 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 19 predicate places. [2022-12-12 15:17:25,020 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 285 flow [2022-12-12 15:17:25,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 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 15:17:25,020 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:17:25,020 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:17:25,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-12 15:17:25,021 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 15:17:25,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:17:25,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1594605871, now seen corresponding path program 1 times [2022-12-12 15:17:25,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:17:25,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583787115] [2022-12-12 15:17:25,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:17:25,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:17:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:17:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:17:25,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:17:25,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583787115] [2022-12-12 15:17:25,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583787115] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:17:25,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:17:25,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 15:17:25,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263345020] [2022-12-12 15:17:25,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:17:25,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 15:17:25,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:17:25,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 15:17:25,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-12 15:17:25,243 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 30 [2022-12-12 15:17:25,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 285 flow. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:17:25,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:17:25,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 30 [2022-12-12 15:17:25,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:17:25,611 INFO L130 PetriNetUnfolder]: 2129/3140 cut-off events. [2022-12-12 15:17:25,611 INFO L131 PetriNetUnfolder]: For 3071/3071 co-relation queries the response was YES. [2022-12-12 15:17:25,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8440 conditions, 3140 events. 2129/3140 cut-off events. For 3071/3071 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14324 event pairs, 895 based on Foata normal form. 26/2910 useless extension candidates. Maximal degree in co-relation 8340. Up to 1756 conditions per place. [2022-12-12 15:17:25,624 INFO L137 encePairwiseOnDemand]: 25/30 looper letters, 85 selfloop transitions, 4 changer transitions 17/106 dead transitions. [2022-12-12 15:17:25,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 106 transitions, 708 flow [2022-12-12 15:17:25,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 15:17:25,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 15:17:25,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 73 transitions. [2022-12-12 15:17:25,626 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2022-12-12 15:17:25,626 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 285 flow. Second operand 5 states and 73 transitions. [2022-12-12 15:17:25,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 106 transitions, 708 flow [2022-12-12 15:17:25,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 106 transitions, 706 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-12 15:17:25,631 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 308 flow [2022-12-12 15:17:25,631 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2022-12-12 15:17:25,632 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 26 predicate places. [2022-12-12 15:17:25,632 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 308 flow [2022-12-12 15:17:25,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:17:25,632 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:17:25,633 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:17:25,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-12 15:17:25,633 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 15:17:25,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:17:25,633 INFO L85 PathProgramCache]: Analyzing trace with hash -711502801, now seen corresponding path program 2 times [2022-12-12 15:17:25,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:17:25,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345848713] [2022-12-12 15:17:25,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:17:25,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:17:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:17:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:17:25,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:17:25,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345848713] [2022-12-12 15:17:25,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345848713] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:17:25,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351672870] [2022-12-12 15:17:25,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:17:25,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:17:25,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:17:25,856 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 15:17:25,858 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 15:17:25,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-12 15:17:25,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:17:25,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-12 15:17:25,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:17:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 15:17:26,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 15:17:26,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351672870] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:17:26,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 15:17:26,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-12-12 15:17:26,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027115902] [2022-12-12 15:17:26,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:17:26,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-12 15:17:26,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:17:26,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-12 15:17:26,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-12 15:17:26,017 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 30 [2022-12-12 15:17:26,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 308 flow. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:17:26,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:17:26,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 30 [2022-12-12 15:17:26,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:17:26,296 INFO L130 PetriNetUnfolder]: 1751/2550 cut-off events. [2022-12-12 15:17:26,297 INFO L131 PetriNetUnfolder]: For 4201/4201 co-relation queries the response was YES. [2022-12-12 15:17:26,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7808 conditions, 2550 events. 1751/2550 cut-off events. For 4201/4201 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10896 event pairs, 591 based on Foata normal form. 72/2622 useless extension candidates. Maximal degree in co-relation 7704. Up to 1504 conditions per place. [2022-12-12 15:17:26,308 INFO L137 encePairwiseOnDemand]: 25/30 looper letters, 79 selfloop transitions, 7 changer transitions 3/89 dead transitions. [2022-12-12 15:17:26,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 89 transitions, 623 flow [2022-12-12 15:17:26,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-12 15:17:26,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-12 15:17:26,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2022-12-12 15:17:26,310 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2022-12-12 15:17:26,311 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 308 flow. Second operand 4 states and 61 transitions. [2022-12-12 15:17:26,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 89 transitions, 623 flow [2022-12-12 15:17:26,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 89 transitions, 610 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-12 15:17:26,315 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 330 flow [2022-12-12 15:17:26,315 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=330, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2022-12-12 15:17:26,317 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 27 predicate places. [2022-12-12 15:17:26,317 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 330 flow [2022-12-12 15:17:26,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:17:26,317 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:17:26,317 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:17:26,323 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 15:17:26,521 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 15:17:26,521 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 15:17:26,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:17:26,522 INFO L85 PathProgramCache]: Analyzing trace with hash 268985718, now seen corresponding path program 1 times [2022-12-12 15:17:26,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:17:26,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128553029] [2022-12-12 15:17:26,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:17:26,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:17:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:17:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:17:26,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:17:26,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128553029] [2022-12-12 15:17:26,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128553029] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:17:26,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095319564] [2022-12-12 15:17:26,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:17:26,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:17:26,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:17:26,729 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 15:17:26,743 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 15:17:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:17:26,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 15:17:26,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:17:26,902 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:17:26,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:17:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:17:26,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095319564] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 15:17:26,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 15:17:26,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2022-12-12 15:17:26,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492269215] [2022-12-12 15:17:26,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:17:26,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 15:17:26,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:17:26,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 15:17:26,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-12 15:17:26,957 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 30 [2022-12-12 15:17:26,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:17:26,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:17:26,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 30 [2022-12-12 15:17:26,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:17:27,382 INFO L130 PetriNetUnfolder]: 2482/3592 cut-off events. [2022-12-12 15:17:27,383 INFO L131 PetriNetUnfolder]: For 6699/6699 co-relation queries the response was YES. [2022-12-12 15:17:27,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11427 conditions, 3592 events. 2482/3592 cut-off events. For 6699/6699 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 16210 event pairs, 281 based on Foata normal form. 40/3632 useless extension candidates. Maximal degree in co-relation 11323. Up to 1825 conditions per place. [2022-12-12 15:17:27,397 INFO L137 encePairwiseOnDemand]: 21/30 looper letters, 106 selfloop transitions, 15 changer transitions 1/122 dead transitions. [2022-12-12 15:17:27,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 122 transitions, 897 flow [2022-12-12 15:17:27,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 15:17:27,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 15:17:27,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 79 transitions. [2022-12-12 15:17:27,398 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2022-12-12 15:17:27,398 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 330 flow. Second operand 6 states and 79 transitions. [2022-12-12 15:17:27,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 122 transitions, 897 flow [2022-12-12 15:17:27,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 122 transitions, 851 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-12-12 15:17:27,403 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 443 flow [2022-12-12 15:17:27,403 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=443, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2022-12-12 15:17:27,404 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 32 predicate places. [2022-12-12 15:17:27,404 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 443 flow [2022-12-12 15:17:27,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:17:27,404 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:17:27,404 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:17:27,413 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 15:17:27,613 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 15:17:27,613 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 15:17:27,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:17:27,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1886646272, now seen corresponding path program 2 times [2022-12-12 15:17:27,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:17:27,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169001818] [2022-12-12 15:17:27,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:17:27,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:17:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:17:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 15:17:27,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:17:27,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169001818] [2022-12-12 15:17:27,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169001818] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:17:27,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453215257] [2022-12-12 15:17:27,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:17:27,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:17:27,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:17:27,810 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 15:17:27,844 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 15:17:28,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:17:28,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:17:28,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-12 15:17:28,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:17:28,117 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 15:17:28,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:17:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 15:17:28,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453215257] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 15:17:28,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 15:17:28,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-12-12 15:17:28,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589824889] [2022-12-12 15:17:28,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:17:28,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 15:17:28,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:17:28,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 15:17:28,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-12-12 15:17:28,194 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 30 [2022-12-12 15:17:28,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 443 flow. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:17:28,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:17:28,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 30 [2022-12-12 15:17:28,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:17:28,666 INFO L130 PetriNetUnfolder]: 2446/3556 cut-off events. [2022-12-12 15:17:28,667 INFO L131 PetriNetUnfolder]: For 8554/8554 co-relation queries the response was YES. [2022-12-12 15:17:28,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13015 conditions, 3556 events. 2446/3556 cut-off events. For 8554/8554 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 16072 event pairs, 437 based on Foata normal form. 36/3592 useless extension candidates. Maximal degree in co-relation 12907. Up to 1452 conditions per place. [2022-12-12 15:17:28,694 INFO L137 encePairwiseOnDemand]: 24/30 looper letters, 104 selfloop transitions, 18 changer transitions 3/125 dead transitions. [2022-12-12 15:17:28,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 125 transitions, 959 flow [2022-12-12 15:17:28,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 15:17:28,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 15:17:28,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2022-12-12 15:17:28,695 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2022-12-12 15:17:28,695 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 443 flow. Second operand 5 states and 80 transitions. [2022-12-12 15:17:28,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 125 transitions, 959 flow [2022-12-12 15:17:28,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 125 transitions, 957 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-12 15:17:28,716 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 542 flow [2022-12-12 15:17:28,716 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=542, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2022-12-12 15:17:28,717 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 39 predicate places. [2022-12-12 15:17:28,717 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 542 flow [2022-12-12 15:17:28,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:17:28,717 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:17:28,717 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:17:28,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-12 15:17:28,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:17:28,923 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 15:17:28,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:17:28,924 INFO L85 PathProgramCache]: Analyzing trace with hash 616736792, now seen corresponding path program 3 times [2022-12-12 15:17:28,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:17:28,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040064234] [2022-12-12 15:17:28,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:17:28,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:17:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:17:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 15:17:29,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:17:29,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040064234] [2022-12-12 15:17:29,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040064234] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 15:17:29,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 15:17:29,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-12 15:17:29,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960997686] [2022-12-12 15:17:29,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:17:29,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 15:17:29,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:17:29,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 15:17:29,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-12 15:17:29,128 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 30 [2022-12-12 15:17:29,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 542 flow. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:17:29,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:17:29,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 30 [2022-12-12 15:17:29,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:17:29,522 INFO L130 PetriNetUnfolder]: 2458/3562 cut-off events. [2022-12-12 15:17:29,522 INFO L131 PetriNetUnfolder]: For 12101/12101 co-relation queries the response was YES. [2022-12-12 15:17:29,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14808 conditions, 3562 events. 2458/3562 cut-off events. For 12101/12101 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 15957 event pairs, 737 based on Foata normal form. 20/3582 useless extension candidates. Maximal degree in co-relation 14696. Up to 1881 conditions per place. [2022-12-12 15:17:29,541 INFO L137 encePairwiseOnDemand]: 25/30 looper letters, 91 selfloop transitions, 15 changer transitions 17/123 dead transitions. [2022-12-12 15:17:29,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 123 transitions, 1045 flow [2022-12-12 15:17:29,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 15:17:29,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 15:17:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 73 transitions. [2022-12-12 15:17:29,543 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2022-12-12 15:17:29,543 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 542 flow. Second operand 5 states and 73 transitions. [2022-12-12 15:17:29,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 123 transitions, 1045 flow [2022-12-12 15:17:29,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 123 transitions, 1043 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-12 15:17:29,584 INFO L231 Difference]: Finished difference. Result has 79 places, 76 transitions, 638 flow [2022-12-12 15:17:29,584 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=638, PETRI_PLACES=79, PETRI_TRANSITIONS=76} [2022-12-12 15:17:29,585 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 45 predicate places. [2022-12-12 15:17:29,585 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 76 transitions, 638 flow [2022-12-12 15:17:29,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:17:29,585 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:17:29,585 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:17:29,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-12 15:17:29,586 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 15:17:29,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:17:29,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1334671558, now seen corresponding path program 4 times [2022-12-12 15:17:29,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:17:29,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865061790] [2022-12-12 15:17:29,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:17:29,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:17:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:17:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 15:17:29,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:17:29,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865061790] [2022-12-12 15:17:29,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865061790] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:17:29,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167235187] [2022-12-12 15:17:29,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 15:17:29,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:17:29,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:17:29,770 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 15:17:29,787 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 15:17:29,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 15:17:29,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:17:29,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-12 15:17:29,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:17:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 15:17:29,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:17:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 15:17:29,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167235187] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 15:17:29,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 15:17:29,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2022-12-12 15:17:29,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593968625] [2022-12-12 15:17:29,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:17:29,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 15:17:29,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:17:29,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 15:17:29,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-12 15:17:29,988 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 30 [2022-12-12 15:17:29,988 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 638 flow. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:17:29,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:17:29,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 30 [2022-12-12 15:17:29,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:17:30,452 INFO L130 PetriNetUnfolder]: 2416/3479 cut-off events. [2022-12-12 15:17:30,452 INFO L131 PetriNetUnfolder]: For 15115/15115 co-relation queries the response was YES. [2022-12-12 15:17:30,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15391 conditions, 3479 events. 2416/3479 cut-off events. For 15115/15115 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 15390 event pairs, 223 based on Foata normal form. 36/3515 useless extension candidates. Maximal degree in co-relation 15276. Up to 833 conditions per place. [2022-12-12 15:17:30,468 INFO L137 encePairwiseOnDemand]: 22/30 looper letters, 112 selfloop transitions, 36 changer transitions 4/152 dead transitions. [2022-12-12 15:17:30,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 152 transitions, 1381 flow [2022-12-12 15:17:30,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 15:17:30,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 15:17:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2022-12-12 15:17:30,469 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2022-12-12 15:17:30,469 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 638 flow. Second operand 7 states and 89 transitions. [2022-12-12 15:17:30,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 152 transitions, 1381 flow [2022-12-12 15:17:30,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 152 transitions, 1323 flow, removed 10 selfloop flow, removed 3 redundant places. [2022-12-12 15:17:30,491 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 835 flow [2022-12-12 15:17:30,492 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=835, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2022-12-12 15:17:30,492 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 49 predicate places. [2022-12-12 15:17:30,492 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 835 flow [2022-12-12 15:17:30,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:17:30,493 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:17:30,493 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:17:30,510 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 15:17:30,698 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 15:17:30,698 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 15:17:30,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:17:30,698 INFO L85 PathProgramCache]: Analyzing trace with hash 750784010, now seen corresponding path program 5 times [2022-12-12 15:17:30,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:17:30,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244224877] [2022-12-12 15:17:30,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:17:30,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:17:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:17:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 15:17:30,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:17:30,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244224877] [2022-12-12 15:17:30,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244224877] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:17:30,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179391068] [2022-12-12 15:17:30,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 15:17:30,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:17:30,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:17:30,873 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 15:17:30,876 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 15:17:31,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 15:17:31,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:17:31,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-12 15:17:31,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:17:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 15:17:31,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:17:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-12 15:17:31,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179391068] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 15:17:31,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 15:17:31,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2022-12-12 15:17:31,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934691933] [2022-12-12 15:17:31,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 15:17:31,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 15:17:31,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:17:31,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 15:17:31,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-12 15:17:31,453 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 30 [2022-12-12 15:17:31,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 835 flow. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:17:31,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:17:31,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 30 [2022-12-12 15:17:31,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:17:31,893 INFO L130 PetriNetUnfolder]: 2432/3489 cut-off events. [2022-12-12 15:17:31,893 INFO L131 PetriNetUnfolder]: For 16231/16231 co-relation queries the response was YES. [2022-12-12 15:17:31,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15861 conditions, 3489 events. 2432/3489 cut-off events. For 16231/16231 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 15465 event pairs, 163 based on Foata normal form. 36/3525 useless extension candidates. Maximal degree in co-relation 15745. Up to 1364 conditions per place. [2022-12-12 15:17:31,910 INFO L137 encePairwiseOnDemand]: 22/30 looper letters, 101 selfloop transitions, 36 changer transitions 4/141 dead transitions. [2022-12-12 15:17:31,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 141 transitions, 1361 flow [2022-12-12 15:17:31,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 15:17:31,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 15:17:31,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 78 transitions. [2022-12-12 15:17:31,911 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2022-12-12 15:17:31,912 INFO L175 Difference]: Start difference. First operand has 83 places, 88 transitions, 835 flow. Second operand 6 states and 78 transitions. [2022-12-12 15:17:31,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 141 transitions, 1361 flow [2022-12-12 15:17:31,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 141 transitions, 1311 flow, removed 11 selfloop flow, removed 3 redundant places. [2022-12-12 15:17:31,957 INFO L231 Difference]: Finished difference. Result has 86 places, 90 transitions, 889 flow [2022-12-12 15:17:31,957 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=889, PETRI_PLACES=86, PETRI_TRANSITIONS=90} [2022-12-12 15:17:31,957 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 52 predicate places. [2022-12-12 15:17:31,957 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 90 transitions, 889 flow [2022-12-12 15:17:31,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:17:31,957 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:17:31,957 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:17:31,974 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 15:17:32,163 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 15:17:32,163 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 15:17:32,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:17:32,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1332337645, now seen corresponding path program 1 times [2022-12-12 15:17:32,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:17:32,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352160930] [2022-12-12 15:17:32,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:17:32,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:17:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:17:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 15:17:35,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:17:35,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352160930] [2022-12-12 15:17:35,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352160930] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:17:35,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750135065] [2022-12-12 15:17:35,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:17:35,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:17:35,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:17:35,245 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 15:17:35,247 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 15:17:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:17:35,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-12 15:17:35,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:17:35,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 15:17:35,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-12 15:17:36,159 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:17:36,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2022-12-12 15:17:36,238 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:17:36,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:17:36,776 WARN L837 $PredicateComparison]: unable to prove that (forall ((~o_4~0.base Int) (v_ArrVal_1183 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1183))) (let ((.cse0 (select .cse2 ~o_2~0.base)) (.cse1 (select (select .cse2 ~o_4~0.base) c_~o_4~0.offset))) (or (< (select .cse0 c_~o_2~0.offset) (+ .cse1 1)) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| (+ (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) 1)) (< .cse1 (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset)))))) is different from false [2022-12-12 15:17:36,873 INFO L321 Elim1Store]: treesize reduction 19, result has 84.8 percent of original size [2022-12-12 15:17:36,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 188 treesize of output 237 [2022-12-12 15:17:36,908 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:17:36,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 122 treesize of output 158 [2022-12-12 15:17:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:17:41,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750135065] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:17:41,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:17:41,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 16, 12] total 60 [2022-12-12 15:17:41,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199906680] [2022-12-12 15:17:41,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:17:41,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-12-12 15:17:41,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:17:41,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-12-12 15:17:41,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=3419, Unknown=1, NotChecked=118, Total=3782 [2022-12-12 15:17:41,567 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 30 [2022-12-12 15:17:41,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 90 transitions, 889 flow. Second operand has 62 states, 61 states have (on average 1.6721311475409837) internal successors, (102), 61 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 15:17:41,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:17:41,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 30 [2022-12-12 15:17:41,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:17:54,601 INFO L130 PetriNetUnfolder]: 13691/19710 cut-off events. [2022-12-12 15:17:54,601 INFO L131 PetriNetUnfolder]: For 105220/105220 co-relation queries the response was YES. [2022-12-12 15:17:54,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89469 conditions, 19710 events. 13691/19710 cut-off events. For 105220/105220 co-relation queries the response was YES. Maximal size of possible extension queue 862. Compared 118500 event pairs, 1050 based on Foata normal form. 6/19716 useless extension candidates. Maximal degree in co-relation 89336. Up to 3493 conditions per place. [2022-12-12 15:17:54,817 INFO L137 encePairwiseOnDemand]: 10/30 looper letters, 732 selfloop transitions, 396 changer transitions 38/1166 dead transitions. [2022-12-12 15:17:54,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 1166 transitions, 12573 flow [2022-12-12 15:17:54,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-12 15:17:54,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-12-12 15:17:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 698 transitions. [2022-12-12 15:17:54,821 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3693121693121693 [2022-12-12 15:17:54,821 INFO L175 Difference]: Start difference. First operand has 86 places, 90 transitions, 889 flow. Second operand 63 states and 698 transitions. [2022-12-12 15:17:54,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 1166 transitions, 12573 flow [2022-12-12 15:17:55,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 1166 transitions, 11615 flow, removed 68 selfloop flow, removed 6 redundant places. [2022-12-12 15:17:55,376 INFO L231 Difference]: Finished difference. Result has 187 places, 514 transitions, 7254 flow [2022-12-12 15:17:55,376 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=7254, PETRI_PLACES=187, PETRI_TRANSITIONS=514} [2022-12-12 15:17:55,377 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 153 predicate places. [2022-12-12 15:17:55,377 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 514 transitions, 7254 flow [2022-12-12 15:17:55,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.6721311475409837) internal successors, (102), 61 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 15:17:55,377 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:17:55,377 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:17:55,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-12 15:17:55,582 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 15:17:55,582 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 15:17:55,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:17:55,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1274229503, now seen corresponding path program 2 times [2022-12-12 15:17:55,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:17:55,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779939863] [2022-12-12 15:17:55,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:17:55,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:17:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:17:56,778 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:17:56,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:17:56,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779939863] [2022-12-12 15:17:56,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779939863] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:17:56,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634031763] [2022-12-12 15:17:56,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 15:17:56,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:17:56,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:17:56,781 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 15:17:56,786 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 15:17:56,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 15:17:56,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:17:56,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-12 15:17:56,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:17:57,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 15:17:57,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:17:57,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2022-12-12 15:17:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:17:57,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:17:57,810 INFO L321 Elim1Store]: treesize reduction 34, result has 72.8 percent of original size [2022-12-12 15:17:57,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 104 [2022-12-12 15:17:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:17:57,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634031763] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:17:57,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:17:57,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 34 [2022-12-12 15:17:57,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57324681] [2022-12-12 15:17:57,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:17:57,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-12 15:17:57,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:17:57,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-12 15:17:57,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2022-12-12 15:17:57,945 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 30 [2022-12-12 15:17:57,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 514 transitions, 7254 flow. Second operand has 35 states, 34 states have (on average 2.235294117647059) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 15:17:57,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:17:57,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 30 [2022-12-12 15:17:57,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:18:04,244 INFO L130 PetriNetUnfolder]: 17791/25532 cut-off events. [2022-12-12 15:18:04,244 INFO L131 PetriNetUnfolder]: For 390200/390200 co-relation queries the response was YES. [2022-12-12 15:18:04,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164901 conditions, 25532 events. 17791/25532 cut-off events. For 390200/390200 co-relation queries the response was YES. Maximal size of possible extension queue 1131. Compared 157180 event pairs, 3230 based on Foata normal form. 4/25536 useless extension candidates. Maximal degree in co-relation 164694. Up to 15352 conditions per place. [2022-12-12 15:18:04,635 INFO L137 encePairwiseOnDemand]: 15/30 looper letters, 408 selfloop transitions, 505 changer transitions 213/1126 dead transitions. [2022-12-12 15:18:04,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 1126 transitions, 17899 flow [2022-12-12 15:18:04,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-12 15:18:04,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-12 15:18:04,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 220 transitions. [2022-12-12 15:18:04,637 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.29333333333333333 [2022-12-12 15:18:04,637 INFO L175 Difference]: Start difference. First operand has 187 places, 514 transitions, 7254 flow. Second operand 25 states and 220 transitions. [2022-12-12 15:18:04,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 1126 transitions, 17899 flow [2022-12-12 15:18:07,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 1126 transitions, 17379 flow, removed 234 selfloop flow, removed 8 redundant places. [2022-12-12 15:18:07,481 INFO L231 Difference]: Finished difference. Result has 218 places, 773 transitions, 12532 flow [2022-12-12 15:18:07,481 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=6954, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=12532, PETRI_PLACES=218, PETRI_TRANSITIONS=773} [2022-12-12 15:18:07,482 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 184 predicate places. [2022-12-12 15:18:07,482 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 773 transitions, 12532 flow [2022-12-12 15:18:07,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.235294117647059) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 15:18:07,482 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:18:07,482 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:18:07,487 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 15:18:07,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-12 15:18:07,687 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 15:18:07,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:18:07,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1665333211, now seen corresponding path program 3 times [2022-12-12 15:18:07,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:18:07,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140525320] [2022-12-12 15:18:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:18:07,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:18:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:18:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-12 15:18:09,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:18:09,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140525320] [2022-12-12 15:18:09,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140525320] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:18:09,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082666329] [2022-12-12 15:18:09,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 15:18:09,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:18:09,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:18:09,287 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 15:18:09,287 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 15:18:09,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 15:18:09,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:18:09,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-12 15:18:09,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:18:09,869 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:18:09,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2022-12-12 15:18:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:18:09,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:18:10,424 INFO L321 Elim1Store]: treesize reduction 34, result has 72.8 percent of original size [2022-12-12 15:18:10,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 104 [2022-12-12 15:18:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:18:10,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082666329] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:18:10,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:18:10,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15, 10] total 42 [2022-12-12 15:18:10,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657661655] [2022-12-12 15:18:10,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:18:10,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-12 15:18:10,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:18:10,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-12 15:18:10,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1632, Unknown=0, NotChecked=0, Total=1806 [2022-12-12 15:18:10,539 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 30 [2022-12-12 15:18:10,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 773 transitions, 12532 flow. Second operand has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 15:18:10,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:18:10,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 30 [2022-12-12 15:18:10,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:18:19,556 INFO L130 PetriNetUnfolder]: 21323/30774 cut-off events. [2022-12-12 15:18:19,556 INFO L131 PetriNetUnfolder]: For 690073/690073 co-relation queries the response was YES. [2022-12-12 15:18:19,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250001 conditions, 30774 events. 21323/30774 cut-off events. For 690073/690073 co-relation queries the response was YES. Maximal size of possible extension queue 1429. Compared 197203 event pairs, 4125 based on Foata normal form. 4/30778 useless extension candidates. Maximal degree in co-relation 249800. Up to 14632 conditions per place. [2022-12-12 15:18:20,128 INFO L137 encePairwiseOnDemand]: 10/30 looper letters, 550 selfloop transitions, 778 changer transitions 22/1350 dead transitions. [2022-12-12 15:18:20,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 1350 transitions, 23754 flow [2022-12-12 15:18:20,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-12 15:18:20,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-12 15:18:20,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 257 transitions. [2022-12-12 15:18:20,130 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3172839506172839 [2022-12-12 15:18:20,130 INFO L175 Difference]: Start difference. First operand has 218 places, 773 transitions, 12532 flow. Second operand 27 states and 257 transitions. [2022-12-12 15:18:20,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 1350 transitions, 23754 flow [2022-12-12 15:18:28,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 1350 transitions, 23033 flow, removed 359 selfloop flow, removed 4 redundant places. [2022-12-12 15:18:28,714 INFO L231 Difference]: Finished difference. Result has 246 places, 1091 transitions, 19350 flow [2022-12-12 15:18:28,715 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=12061, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=19350, PETRI_PLACES=246, PETRI_TRANSITIONS=1091} [2022-12-12 15:18:28,715 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 212 predicate places. [2022-12-12 15:18:28,715 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 1091 transitions, 19350 flow [2022-12-12 15:18:28,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 15:18:28,716 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:18:28,716 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:18:28,721 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 15:18:28,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-12 15:18:28,921 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 15:18:28,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:18:28,921 INFO L85 PathProgramCache]: Analyzing trace with hash 385990277, now seen corresponding path program 4 times [2022-12-12 15:18:28,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:18:28,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471962704] [2022-12-12 15:18:28,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:18:28,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:18:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:18:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-12 15:18:30,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:18:30,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471962704] [2022-12-12 15:18:30,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471962704] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:18:30,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748109715] [2022-12-12 15:18:30,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 15:18:30,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:18:30,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:18:30,561 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 15:18:30,562 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 15:18:30,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 15:18:30,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:18:30,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-12 15:18:30,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:18:31,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 15:18:31,125 INFO L321 Elim1Store]: treesize reduction 16, result has 63.6 percent of original size [2022-12-12 15:18:31,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 43 [2022-12-12 15:18:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:18:31,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:18:31,611 INFO L321 Elim1Store]: treesize reduction 34, result has 72.8 percent of original size [2022-12-12 15:18:31,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 104 [2022-12-12 15:18:31,718 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:18:31,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748109715] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:18:31,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:18:31,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15, 10] total 40 [2022-12-12 15:18:31,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256003252] [2022-12-12 15:18:31,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:18:31,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-12 15:18:31,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:18:31,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-12 15:18:31,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2022-12-12 15:18:31,720 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 30 [2022-12-12 15:18:31,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 1091 transitions, 19350 flow. Second operand has 41 states, 40 states have (on average 2.05) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:18:31,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:18:31,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 30 [2022-12-12 15:18:31,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:18:58,547 INFO L130 PetriNetUnfolder]: 46201/66645 cut-off events. [2022-12-12 15:18:58,548 INFO L131 PetriNetUnfolder]: For 1740347/1740347 co-relation queries the response was YES. [2022-12-12 15:18:59,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 580897 conditions, 66645 events. 46201/66645 cut-off events. For 1740347/1740347 co-relation queries the response was YES. Maximal size of possible extension queue 3115. Compared 472178 event pairs, 8480 based on Foata normal form. 4/66649 useless extension candidates. Maximal degree in co-relation 568525. Up to 16421 conditions per place. [2022-12-12 15:19:00,376 INFO L137 encePairwiseOnDemand]: 12/30 looper letters, 1636 selfloop transitions, 1989 changer transitions 76/3701 dead transitions. [2022-12-12 15:19:00,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 3701 transitions, 68822 flow [2022-12-12 15:19:00,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-12-12 15:19:00,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2022-12-12 15:19:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 1017 transitions. [2022-12-12 15:19:00,401 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.32596153846153847 [2022-12-12 15:19:00,401 INFO L175 Difference]: Start difference. First operand has 246 places, 1091 transitions, 19350 flow. Second operand 104 states and 1017 transitions. [2022-12-12 15:19:00,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 3701 transitions, 68822 flow [2022-12-12 15:19:52,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 3701 transitions, 67168 flow, removed 440 selfloop flow, removed 10 redundant places. [2022-12-12 15:19:53,038 INFO L231 Difference]: Finished difference. Result has 379 places, 2300 transitions, 46587 flow [2022-12-12 15:19:53,039 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=18836, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1091, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=780, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=46587, PETRI_PLACES=379, PETRI_TRANSITIONS=2300} [2022-12-12 15:19:53,044 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 345 predicate places. [2022-12-12 15:19:53,045 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 2300 transitions, 46587 flow [2022-12-12 15:19:53,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.05) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:19:53,046 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:19:53,046 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:19:53,054 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 15:19:53,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-12 15:19:53,252 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 15:19:53,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:19:53,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1005160873, now seen corresponding path program 5 times [2022-12-12 15:19:53,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:19:53,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452267672] [2022-12-12 15:19:53,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:19:53,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:19:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:19:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:19:54,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:19:54,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452267672] [2022-12-12 15:19:54,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452267672] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:19:54,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171298609] [2022-12-12 15:19:54,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 15:19:54,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:19:54,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:19:54,253 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 15:19:54,255 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 15:19:54,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-12 15:19:54,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:19:54,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-12 15:19:54,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:19:54,896 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:19:54,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2022-12-12 15:19:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:19:54,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:19:55,357 INFO L321 Elim1Store]: treesize reduction 34, result has 72.8 percent of original size [2022-12-12 15:19:55,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 104 [2022-12-12 15:19:55,469 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:19:55,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171298609] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:19:55,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:19:55,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 29 [2022-12-12 15:19:55,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363541838] [2022-12-12 15:19:55,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:19:55,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-12 15:19:55,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:19:55,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-12 15:19:55,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-12-12 15:19:55,471 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 30 [2022-12-12 15:19:55,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 2300 transitions, 46587 flow. Second operand has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:19:55,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:19:55,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 30 [2022-12-12 15:19:55,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:20:25,577 INFO L130 PetriNetUnfolder]: 47249/68201 cut-off events. [2022-12-12 15:20:25,577 INFO L131 PetriNetUnfolder]: For 2938389/2938389 co-relation queries the response was YES. [2022-12-12 15:20:27,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 678269 conditions, 68201 events. 47249/68201 cut-off events. For 2938389/2938389 co-relation queries the response was YES. Maximal size of possible extension queue 3149. Compared 483956 event pairs, 10288 based on Foata normal form. 8/68209 useless extension candidates. Maximal degree in co-relation 665037. Up to 31772 conditions per place. [2022-12-12 15:20:28,192 INFO L137 encePairwiseOnDemand]: 15/30 looper letters, 712 selfloop transitions, 1807 changer transitions 16/2535 dead transitions. [2022-12-12 15:20:28,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 2535 transitions, 55766 flow [2022-12-12 15:20:28,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-12 15:20:28,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-12 15:20:28,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 197 transitions. [2022-12-12 15:20:28,193 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3648148148148148 [2022-12-12 15:20:28,193 INFO L175 Difference]: Start difference. First operand has 379 places, 2300 transitions, 46587 flow. Second operand 18 states and 197 transitions. [2022-12-12 15:20:28,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 2535 transitions, 55766 flow [2022-12-12 15:21:56,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 2535 transitions, 54140 flow, removed 646 selfloop flow, removed 16 redundant places. [2022-12-12 15:21:56,572 INFO L231 Difference]: Finished difference. Result has 383 places, 2321 transitions, 49346 flow [2022-12-12 15:21:56,573 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=44961, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1786, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=49346, PETRI_PLACES=383, PETRI_TRANSITIONS=2321} [2022-12-12 15:21:56,574 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 349 predicate places. [2022-12-12 15:21:56,574 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 2321 transitions, 49346 flow [2022-12-12 15:21:56,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:21:56,574 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:21:56,574 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:21:56,584 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 15:21:56,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:21:56,775 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 15:21:56,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:21:56,776 INFO L85 PathProgramCache]: Analyzing trace with hash -653736321, now seen corresponding path program 6 times [2022-12-12 15:21:56,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:21:56,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778450855] [2022-12-12 15:21:56,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:21:56,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:21:56,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:21:57,528 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:21:57,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:21:57,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778450855] [2022-12-12 15:21:57,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778450855] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:21:57,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264552736] [2022-12-12 15:21:57,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 15:21:57,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:21:57,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:21:57,540 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 15:21:57,571 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 15:21:57,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-12 15:21:57,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 15:21:57,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-12 15:21:57,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:21:58,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:21:58,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2022-12-12 15:21:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:21:58,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:21:58,585 INFO L321 Elim1Store]: treesize reduction 34, result has 72.8 percent of original size [2022-12-12 15:21:58,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 104 [2022-12-12 15:21:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:21:58,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264552736] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:21:58,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:21:58,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 28 [2022-12-12 15:21:58,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682545204] [2022-12-12 15:21:58,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:21:58,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-12 15:21:58,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:21:58,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-12 15:21:58,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-12-12 15:21:58,689 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 30 [2022-12-12 15:21:58,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 2321 transitions, 49346 flow. Second operand has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:21:58,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:21:58,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 30 [2022-12-12 15:21:58,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 15:22:32,516 INFO L130 PetriNetUnfolder]: 51145/73781 cut-off events. [2022-12-12 15:22:32,517 INFO L131 PetriNetUnfolder]: For 3655968/3655968 co-relation queries the response was YES. [2022-12-12 15:22:35,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768574 conditions, 73781 events. 51145/73781 cut-off events. For 3655968/3655968 co-relation queries the response was YES. Maximal size of possible extension queue 3514. Compared 529529 event pairs, 10055 based on Foata normal form. 4/73785 useless extension candidates. Maximal degree in co-relation 755326. Up to 29664 conditions per place. [2022-12-12 15:22:35,515 INFO L137 encePairwiseOnDemand]: 16/30 looper letters, 640 selfloop transitions, 2005 changer transitions 18/2663 dead transitions. [2022-12-12 15:22:35,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 2663 transitions, 61169 flow [2022-12-12 15:22:35,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-12 15:22:35,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-12 15:22:35,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 235 transitions. [2022-12-12 15:22:35,516 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3560606060606061 [2022-12-12 15:22:35,516 INFO L175 Difference]: Start difference. First operand has 383 places, 2321 transitions, 49346 flow. Second operand 22 states and 235 transitions. [2022-12-12 15:22:35,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 2663 transitions, 61169 flow [2022-12-12 15:24:24,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 2663 transitions, 57885 flow, removed 108 selfloop flow, removed 13 redundant places. [2022-12-12 15:24:24,600 INFO L231 Difference]: Finished difference. Result has 398 places, 2424 transitions, 53259 flow [2022-12-12 15:24:24,601 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=46162, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1902, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=53259, PETRI_PLACES=398, PETRI_TRANSITIONS=2424} [2022-12-12 15:24:24,601 INFO L295 CegarLoopForPetriNet]: 34 programPoint places, 364 predicate places. [2022-12-12 15:24:24,602 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 2424 transitions, 53259 flow [2022-12-12 15:24:24,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 15:24:24,602 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 15:24:24,602 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 15:24:24,610 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 15:24:24,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:24:24,808 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 15:24:24,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 15:24:24,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1280658351, now seen corresponding path program 7 times [2022-12-12 15:24:24,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 15:24:24,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274902990] [2022-12-12 15:24:24,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 15:24:24,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 15:24:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:24:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 15:24:28,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 15:24:28,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274902990] [2022-12-12 15:24:28,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274902990] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 15:24:28,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252481307] [2022-12-12 15:24:28,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 15:24:28,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 15:24:28,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 15:24:28,336 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 15:24:28,338 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 15:24:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 15:24:28,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-12 15:24:28,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 15:24:28,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 15:24:28,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2022-12-12 15:24:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:24:28,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 15:24:29,518 INFO L321 Elim1Store]: treesize reduction 34, result has 72.8 percent of original size [2022-12-12 15:24:29,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 104 [2022-12-12 15:24:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 15:24:29,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252481307] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 15:24:29,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 15:24:29,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 15, 10] total 48 [2022-12-12 15:24:29,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388975500] [2022-12-12 15:24:29,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 15:24:29,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-12 15:24:29,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 15:24:29,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-12 15:24:29,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=2137, Unknown=0, NotChecked=0, Total=2352 [2022-12-12 15:24:29,614 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 30 [2022-12-12 15:24:29,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 2424 transitions, 53259 flow. Second operand has 49 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 49 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 15:24:29,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 15:24:29,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 30 [2022-12-12 15:24:29,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand