/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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-0612a5f-m [2022-09-20 21:21:49,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-20 21:21:49,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-20 21:21:49,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-20 21:21:49,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-20 21:21:49,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-20 21:21:49,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-20 21:21:49,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-20 21:21:49,728 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-20 21:21:49,729 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-20 21:21:49,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-20 21:21:49,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-20 21:21:49,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-20 21:21:49,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-20 21:21:49,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-20 21:21:49,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-20 21:21:49,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-20 21:21:49,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-20 21:21:49,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-20 21:21:49,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-20 21:21:49,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-20 21:21:49,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-20 21:21:49,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-20 21:21:49,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-20 21:21:49,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-20 21:21:49,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-20 21:21:49,752 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-20 21:21:49,753 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-20 21:21:49,753 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-20 21:21:49,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-20 21:21:49,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-20 21:21:49,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-20 21:21:49,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-20 21:21:49,755 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-20 21:21:49,756 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-20 21:21:49,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-20 21:21:49,756 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-20 21:21:49,756 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-20 21:21:49,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-20 21:21:49,757 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-20 21:21:49,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-20 21:21:49,758 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-NoLbe.epf [2022-09-20 21:21:49,769 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-20 21:21:49,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-20 21:21:49,769 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-20 21:21:49,769 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-20 21:21:49,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-20 21:21:49,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-20 21:21:49,770 INFO L138 SettingsManager]: * Use SBE=true [2022-09-20 21:21:49,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-20 21:21:49,770 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-20 21:21:49,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-20 21:21:49,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-20 21:21:49,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-20 21:21:49,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-20 21:21:49,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-20 21:21:49,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-20 21:21:49,771 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-20 21:21:49,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-20 21:21:49,773 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-20 21:21:49,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-20 21:21:49,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-20 21:21:49,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-20 21:21:49,773 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-20 21:21:49,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-20 21:21:49,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 21:21:49,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-20 21:21:49,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-20 21:21:49,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-20 21:21:49,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-20 21:21:49,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-20 21:21:49,775 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-20 21:21:49,775 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-20 21:21:49,775 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-20 21:21:49,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-20 21:21:49,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-20 21:21:49,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-20 21:21:49,959 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-20 21:21:49,960 INFO L275 PluginConnector]: CDTParser initialized [2022-09-20 21:21:49,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2022-09-20 21:21:50,011 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/314982f28/b65aeb9e697446f0b6226364d46331ec/FLAGe048fce77 [2022-09-20 21:21:50,357 INFO L306 CDTParser]: Found 1 translation units. [2022-09-20 21:21:50,358 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2022-09-20 21:21:50,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/314982f28/b65aeb9e697446f0b6226364d46331ec/FLAGe048fce77 [2022-09-20 21:21:50,370 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/314982f28/b65aeb9e697446f0b6226364d46331ec [2022-09-20 21:21:50,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-20 21:21:50,372 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-20 21:21:50,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-20 21:21:50,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-20 21:21:50,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-20 21:21:50,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 09:21:50" (1/1) ... [2022-09-20 21:21:50,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78467d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:21:50, skipping insertion in model container [2022-09-20 21:21:50,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 09:21:50" (1/1) ... [2022-09-20 21:21:50,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-20 21:21:50,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-20 21:21:50,529 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2022-09-20 21:21:50,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 21:21:50,537 INFO L203 MainTranslator]: Completed pre-run [2022-09-20 21:21:50,553 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2022-09-20 21:21:50,557 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 21:21:50,565 INFO L208 MainTranslator]: Completed translation [2022-09-20 21:21:50,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:21:50 WrapperNode [2022-09-20 21:21:50,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-20 21:21:50,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-20 21:21:50,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-20 21:21:50,567 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-20 21:21:50,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:21:50" (1/1) ... [2022-09-20 21:21:50,576 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:21:50" (1/1) ... [2022-09-20 21:21:50,591 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 179 [2022-09-20 21:21:50,591 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-20 21:21:50,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-20 21:21:50,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-20 21:21:50,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-20 21:21:50,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:21:50" (1/1) ... [2022-09-20 21:21:50,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:21:50" (1/1) ... [2022-09-20 21:21:50,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:21:50" (1/1) ... [2022-09-20 21:21:50,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:21:50" (1/1) ... [2022-09-20 21:21:50,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:21:50" (1/1) ... [2022-09-20 21:21:50,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:21:50" (1/1) ... [2022-09-20 21:21:50,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:21:50" (1/1) ... [2022-09-20 21:21:50,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-20 21:21:50,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-20 21:21:50,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-20 21:21:50,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-20 21:21:50,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:21:50" (1/1) ... [2022-09-20 21:21:50,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 21:21:50,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:21:50,651 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) [2022-09-20 21:21:50,670 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 [2022-09-20 21:21:50,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-20 21:21:50,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-20 21:21:50,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-20 21:21:50,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-20 21:21:50,687 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-20 21:21:50,687 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-20 21:21:50,687 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-20 21:21:50,687 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-20 21:21:50,687 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-09-20 21:21:50,687 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-09-20 21:21:50,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-20 21:21:50,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-20 21:21:50,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-20 21:21:50,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-09-20 21:21:50,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-20 21:21:50,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-20 21:21:50,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-20 21:21:50,689 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-20 21:21:50,747 INFO L234 CfgBuilder]: Building ICFG [2022-09-20 21:21:50,748 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-20 21:21:50,975 INFO L275 CfgBuilder]: Performing block encoding [2022-09-20 21:21:51,038 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-20 21:21:51,038 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-09-20 21:21:51,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 09:21:51 BoogieIcfgContainer [2022-09-20 21:21:51,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-20 21:21:51,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-20 21:21:51,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-20 21:21:51,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-20 21:21:51,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 09:21:50" (1/3) ... [2022-09-20 21:21:51,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b443a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 09:21:51, skipping insertion in model container [2022-09-20 21:21:51,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:21:50" (2/3) ... [2022-09-20 21:21:51,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b443a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 09:21:51, skipping insertion in model container [2022-09-20 21:21:51,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 09:21:51" (3/3) ... [2022-09-20 21:21:51,054 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2022-09-20 21:21:51,066 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-20 21:21:51,066 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-09-20 21:21:51,066 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-20 21:21:51,117 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-09-20 21:21:51,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 154 transitions, 332 flow [2022-09-20 21:21:51,194 INFO L130 PetriNetUnfolder]: 9/151 cut-off events. [2022-09-20 21:21:51,194 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-09-20 21:21:51,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 151 events. 9/151 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 86 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2022-09-20 21:21:51,197 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 154 transitions, 332 flow [2022-09-20 21:21:51,203 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 140 transitions, 298 flow [2022-09-20 21:21:51,216 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 21:21:51,222 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;@2c6ee269, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 21:21:51,222 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-09-20 21:21:51,262 INFO L130 PetriNetUnfolder]: 9/139 cut-off events. [2022-09-20 21:21:51,263 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-09-20 21:21:51,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:21:51,263 INFO L208 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:21:51,264 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)] === [2022-09-20 21:21:51,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:21:51,269 INFO L85 PathProgramCache]: Analyzing trace with hash 280190883, now seen corresponding path program 1 times [2022-09-20 21:21:51,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:21:51,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670876908] [2022-09-20 21:21:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:21:51,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:21:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:21:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:21:51,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:21:51,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670876908] [2022-09-20 21:21:51,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670876908] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:21:51,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:21:51,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 21:21:51,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062891386] [2022-09-20 21:21:51,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:21:51,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-09-20 21:21:51,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:21:51,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-09-20 21:21:51,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-09-20 21:21:51,531 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 154 [2022-09-20 21:21:51,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 140 transitions, 298 flow. Second operand has 2 states, 2 states have (on average 143.0) internal successors, (286), 2 states have internal predecessors, (286), 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) [2022-09-20 21:21:51,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:21:51,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 154 [2022-09-20 21:21:51,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:21:51,608 INFO L130 PetriNetUnfolder]: 18/215 cut-off events. [2022-09-20 21:21:51,608 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-09-20 21:21:51,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 215 events. 18/215 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 461 event pairs, 15 based on Foata normal form. 19/223 useless extension candidates. Maximal degree in co-relation 150. Up to 37 conditions per place. [2022-09-20 21:21:51,612 INFO L137 encePairwiseOnDemand]: 148/154 looper letters, 9 selfloop transitions, 0 changer transitions 3/134 dead transitions. [2022-09-20 21:21:51,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 134 transitions, 304 flow [2022-09-20 21:21:51,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-20 21:21:51,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-09-20 21:21:51,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 291 transitions. [2022-09-20 21:21:51,625 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9448051948051948 [2022-09-20 21:21:51,625 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 291 transitions. [2022-09-20 21:21:51,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 291 transitions. [2022-09-20 21:21:51,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:21:51,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 291 transitions. [2022-09-20 21:21:51,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 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) [2022-09-20 21:21:51,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 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) [2022-09-20 21:21:51,635 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 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) [2022-09-20 21:21:51,636 INFO L175 Difference]: Start difference. First operand has 141 places, 140 transitions, 298 flow. Second operand 2 states and 291 transitions. [2022-09-20 21:21:51,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 134 transitions, 304 flow [2022-09-20 21:21:51,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 134 transitions, 292 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-09-20 21:21:51,642 INFO L231 Difference]: Finished difference. Result has 136 places, 131 transitions, 268 flow [2022-09-20 21:21:51,643 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=268, PETRI_PLACES=136, PETRI_TRANSITIONS=131} [2022-09-20 21:21:51,646 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, -5 predicate places. [2022-09-20 21:21:51,646 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 131 transitions, 268 flow [2022-09-20 21:21:51,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 143.0) internal successors, (286), 2 states have internal predecessors, (286), 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) [2022-09-20 21:21:51,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:21:51,647 INFO L208 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:21:51,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-20 21:21:51,647 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)] === [2022-09-20 21:21:51,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:21:51,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1057257848, now seen corresponding path program 1 times [2022-09-20 21:21:51,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:21:51,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594394181] [2022-09-20 21:21:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:21:51,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:21:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:21:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:21:51,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:21:51,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594394181] [2022-09-20 21:21:51,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594394181] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:21:51,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:21:51,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-20 21:21:51,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034260525] [2022-09-20 21:21:51,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:21:51,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 21:21:51,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:21:51,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 21:21:51,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-09-20 21:21:51,802 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 154 [2022-09-20 21:21:51,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 131 transitions, 268 flow. Second operand has 6 states, 6 states have (on average 127.16666666666667) internal successors, (763), 6 states have internal predecessors, (763), 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) [2022-09-20 21:21:51,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:21:51,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 154 [2022-09-20 21:21:51,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:21:51,911 INFO L130 PetriNetUnfolder]: 20/259 cut-off events. [2022-09-20 21:21:51,911 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-09-20 21:21:51,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 259 events. 20/259 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 611 event pairs, 15 based on Foata normal form. 6/254 useless extension candidates. Maximal degree in co-relation 327. Up to 46 conditions per place. [2022-09-20 21:21:51,914 INFO L137 encePairwiseOnDemand]: 144/154 looper letters, 21 selfloop transitions, 6 changer transitions 4/139 dead transitions. [2022-09-20 21:21:51,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 139 transitions, 349 flow [2022-09-20 21:21:51,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-20 21:21:51,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-20 21:21:51,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 902 transitions. [2022-09-20 21:21:51,917 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8367346938775511 [2022-09-20 21:21:51,917 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 902 transitions. [2022-09-20 21:21:51,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 902 transitions. [2022-09-20 21:21:51,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:21:51,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 902 transitions. [2022-09-20 21:21:51,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.85714285714286) internal successors, (902), 7 states have internal predecessors, (902), 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) [2022-09-20 21:21:51,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 154.0) internal successors, (1232), 8 states have internal predecessors, (1232), 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) [2022-09-20 21:21:51,924 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 154.0) internal successors, (1232), 8 states have internal predecessors, (1232), 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) [2022-09-20 21:21:51,924 INFO L175 Difference]: Start difference. First operand has 136 places, 131 transitions, 268 flow. Second operand 7 states and 902 transitions. [2022-09-20 21:21:51,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 139 transitions, 349 flow [2022-09-20 21:21:51,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 139 transitions, 349 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 21:21:51,929 INFO L231 Difference]: Finished difference. Result has 141 places, 132 transitions, 294 flow [2022-09-20 21:21:51,929 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=294, PETRI_PLACES=141, PETRI_TRANSITIONS=132} [2022-09-20 21:21:51,929 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 0 predicate places. [2022-09-20 21:21:51,929 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 132 transitions, 294 flow [2022-09-20 21:21:51,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 127.16666666666667) internal successors, (763), 6 states have internal predecessors, (763), 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) [2022-09-20 21:21:51,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:21:51,930 INFO L208 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:21:51,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-20 21:21:51,931 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)] === [2022-09-20 21:21:51,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:21:51,932 INFO L85 PathProgramCache]: Analyzing trace with hash 370033410, now seen corresponding path program 1 times [2022-09-20 21:21:51,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:21:51,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590923633] [2022-09-20 21:21:51,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:21:51,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:21:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:21:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:21:52,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:21:52,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590923633] [2022-09-20 21:21:52,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590923633] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:21:52,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251736176] [2022-09-20 21:21:52,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:21:52,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:21:52,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:21:52,083 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) [2022-09-20 21:21:52,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-09-20 21:21:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:21:52,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 9 conjunts are in the unsatisfiable core [2022-09-20 21:21:52,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:21:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:21:52,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:21:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:21:52,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251736176] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:21:52,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:21:52,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-09-20 21:21:52,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143257766] [2022-09-20 21:21:52,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:21:52,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-20 21:21:52,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:21:52,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-20 21:21:52,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-09-20 21:21:52,574 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 154 [2022-09-20 21:21:52,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 132 transitions, 294 flow. Second operand has 18 states, 18 states have (on average 124.0) internal successors, (2232), 18 states have internal predecessors, (2232), 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) [2022-09-20 21:21:52,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:21:52,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 154 [2022-09-20 21:21:52,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:21:52,794 INFO L130 PetriNetUnfolder]: 24/300 cut-off events. [2022-09-20 21:21:52,795 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-09-20 21:21:52,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 300 events. 24/300 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 857 event pairs, 15 based on Foata normal form. 9/299 useless extension candidates. Maximal degree in co-relation 426. Up to 44 conditions per place. [2022-09-20 21:21:52,796 INFO L137 encePairwiseOnDemand]: 140/154 looper letters, 23 selfloop transitions, 12 changer transitions 9/149 dead transitions. [2022-09-20 21:21:52,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 149 transitions, 430 flow [2022-09-20 21:21:52,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-09-20 21:21:52,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-09-20 21:21:52,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1621 transitions. [2022-09-20 21:21:52,799 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8096903096903096 [2022-09-20 21:21:52,800 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1621 transitions. [2022-09-20 21:21:52,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1621 transitions. [2022-09-20 21:21:52,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:21:52,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1621 transitions. [2022-09-20 21:21:52,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 124.6923076923077) internal successors, (1621), 13 states have internal predecessors, (1621), 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) [2022-09-20 21:21:52,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 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) [2022-09-20 21:21:52,807 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 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) [2022-09-20 21:21:52,807 INFO L175 Difference]: Start difference. First operand has 141 places, 132 transitions, 294 flow. Second operand 13 states and 1621 transitions. [2022-09-20 21:21:52,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 149 transitions, 430 flow [2022-09-20 21:21:52,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 149 transitions, 420 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-09-20 21:21:52,812 INFO L231 Difference]: Finished difference. Result has 154 places, 136 transitions, 349 flow [2022-09-20 21:21:52,813 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=349, PETRI_PLACES=154, PETRI_TRANSITIONS=136} [2022-09-20 21:21:52,814 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 13 predicate places. [2022-09-20 21:21:52,814 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 136 transitions, 349 flow [2022-09-20 21:21:52,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 124.0) internal successors, (2232), 18 states have internal predecessors, (2232), 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) [2022-09-20 21:21:52,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:21:52,816 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:21:52,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-09-20 21:21:53,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:21:53,029 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)] === [2022-09-20 21:21:53,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:21:53,029 INFO L85 PathProgramCache]: Analyzing trace with hash -807681704, now seen corresponding path program 2 times [2022-09-20 21:21:53,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:21:53,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260737702] [2022-09-20 21:21:53,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:21:53,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:21:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:21:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:21:55,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:21:55,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260737702] [2022-09-20 21:21:55,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260737702] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:21:55,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70087330] [2022-09-20 21:21:55,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:21:55,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:21:55,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:21:55,348 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) [2022-09-20 21:21:55,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-09-20 21:21:55,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-09-20 21:21:55,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:21:55,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjunts are in the unsatisfiable core [2022-09-20 21:21:55,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:21:55,869 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:21:55,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-09-20 21:21:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:21:55,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 21:21:55,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70087330] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:21:55,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 21:21:55,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [36] total 44 [2022-09-20 21:21:55,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762487976] [2022-09-20 21:21:55,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:21:55,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-09-20 21:21:55,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:21:55,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-09-20 21:21:55,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1769, Unknown=0, NotChecked=0, Total=1892 [2022-09-20 21:21:55,969 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2022-09-20 21:21:55,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 136 transitions, 349 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 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) [2022-09-20 21:21:55,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:21:55,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2022-09-20 21:21:55,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:21:56,452 INFO L130 PetriNetUnfolder]: 424/1101 cut-off events. [2022-09-20 21:21:56,452 INFO L131 PetriNetUnfolder]: For 892/892 co-relation queries the response was YES. [2022-09-20 21:21:56,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2344 conditions, 1101 events. 424/1101 cut-off events. For 892/892 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6072 event pairs, 139 based on Foata normal form. 35/1083 useless extension candidates. Maximal degree in co-relation 2332. Up to 500 conditions per place. [2022-09-20 21:21:56,461 INFO L137 encePairwiseOnDemand]: 137/154 looper letters, 70 selfloop transitions, 15 changer transitions 36/211 dead transitions. [2022-09-20 21:21:56,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 211 transitions, 804 flow [2022-09-20 21:21:56,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-09-20 21:21:56,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-09-20 21:21:56,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1400 transitions. [2022-09-20 21:21:56,464 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6993006993006993 [2022-09-20 21:21:56,464 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1400 transitions. [2022-09-20 21:21:56,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1400 transitions. [2022-09-20 21:21:56,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:21:56,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1400 transitions. [2022-09-20 21:21:56,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.6923076923077) internal successors, (1400), 13 states have internal predecessors, (1400), 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) [2022-09-20 21:21:56,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 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) [2022-09-20 21:21:56,469 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 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) [2022-09-20 21:21:56,470 INFO L175 Difference]: Start difference. First operand has 154 places, 136 transitions, 349 flow. Second operand 13 states and 1400 transitions. [2022-09-20 21:21:56,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 211 transitions, 804 flow [2022-09-20 21:21:56,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 211 transitions, 749 flow, removed 22 selfloop flow, removed 7 redundant places. [2022-09-20 21:21:56,476 INFO L231 Difference]: Finished difference. Result has 168 places, 150 transitions, 455 flow [2022-09-20 21:21:56,477 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=455, PETRI_PLACES=168, PETRI_TRANSITIONS=150} [2022-09-20 21:21:56,477 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 27 predicate places. [2022-09-20 21:21:56,478 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 150 transitions, 455 flow [2022-09-20 21:21:56,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 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) [2022-09-20 21:21:56,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:21:56,479 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:21:56,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-09-20 21:21:56,691 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,SelfDestructingSolverStorable3 [2022-09-20 21:21:56,692 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)] === [2022-09-20 21:21:56,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:21:56,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1547784650, now seen corresponding path program 3 times [2022-09-20 21:21:56,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:21:56,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035518512] [2022-09-20 21:21:56,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:21:56,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:21:56,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:21:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:21:58,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:21:58,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035518512] [2022-09-20 21:21:58,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035518512] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:21:58,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497550154] [2022-09-20 21:21:58,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:21:58,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:21:58,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:21:58,325 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) [2022-09-20 21:21:58,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-09-20 21:21:58,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-09-20 21:21:58,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:21:58,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2022-09-20 21:21:58,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:21:58,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:21:58,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 23 [2022-09-20 21:21:59,106 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:21:59,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-09-20 21:21:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:21:59,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 21:21:59,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497550154] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:21:59,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 21:21:59,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [34] total 49 [2022-09-20 21:21:59,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975852664] [2022-09-20 21:21:59,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:21:59,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-09-20 21:21:59,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:21:59,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-09-20 21:21:59,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2221, Unknown=0, NotChecked=0, Total=2352 [2022-09-20 21:21:59,229 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-09-20 21:21:59,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 150 transitions, 455 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 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) [2022-09-20 21:21:59,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:21:59,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-09-20 21:21:59,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:22:00,237 INFO L130 PetriNetUnfolder]: 570/1363 cut-off events. [2022-09-20 21:22:00,237 INFO L131 PetriNetUnfolder]: For 1561/1659 co-relation queries the response was YES. [2022-09-20 21:22:00,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3548 conditions, 1363 events. 570/1363 cut-off events. For 1561/1659 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7674 event pairs, 149 based on Foata normal form. 30/1328 useless extension candidates. Maximal degree in co-relation 3527. Up to 656 conditions per place. [2022-09-20 21:22:00,246 INFO L137 encePairwiseOnDemand]: 130/154 looper letters, 83 selfloop transitions, 28 changer transitions 37/225 dead transitions. [2022-09-20 21:22:00,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 225 transitions, 1051 flow [2022-09-20 21:22:00,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-20 21:22:00,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-20 21:22:00,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1877 transitions. [2022-09-20 21:22:00,251 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5803957946815089 [2022-09-20 21:22:00,251 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1877 transitions. [2022-09-20 21:22:00,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1877 transitions. [2022-09-20 21:22:00,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:22:00,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1877 transitions. [2022-09-20 21:22:00,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.38095238095238) internal successors, (1877), 21 states have internal predecessors, (1877), 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) [2022-09-20 21:22:00,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 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) [2022-09-20 21:22:00,259 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 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) [2022-09-20 21:22:00,259 INFO L175 Difference]: Start difference. First operand has 168 places, 150 transitions, 455 flow. Second operand 21 states and 1877 transitions. [2022-09-20 21:22:00,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 225 transitions, 1051 flow [2022-09-20 21:22:00,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 225 transitions, 1003 flow, removed 24 selfloop flow, removed 6 redundant places. [2022-09-20 21:22:00,265 INFO L231 Difference]: Finished difference. Result has 187 places, 166 transitions, 634 flow [2022-09-20 21:22:00,265 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=634, PETRI_PLACES=187, PETRI_TRANSITIONS=166} [2022-09-20 21:22:00,265 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 46 predicate places. [2022-09-20 21:22:00,266 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 166 transitions, 634 flow [2022-09-20 21:22:00,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 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) [2022-09-20 21:22:00,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:22:00,267 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:22:00,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-09-20 21:22:00,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:00,472 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)] === [2022-09-20 21:22:00,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:22:00,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1617976500, now seen corresponding path program 4 times [2022-09-20 21:22:00,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:22:00,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386180726] [2022-09-20 21:22:00,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:00,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:22:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:01,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:22:01,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386180726] [2022-09-20 21:22:01,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386180726] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:22:01,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207082729] [2022-09-20 21:22:01,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:22:01,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:01,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:22:01,350 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) [2022-09-20 21:22:01,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-09-20 21:22:01,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:22:01,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:22:01,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 51 conjunts are in the unsatisfiable core [2022-09-20 21:22:01,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:22:02,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:22:02,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 23 [2022-09-20 21:22:02,484 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:22:02,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-09-20 21:22:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:02,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:22:03,233 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-09-20 21:22:03,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 154 treesize of output 155 [2022-09-20 21:22:03,261 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-09-20 21:22:03,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 68 [2022-09-20 21:22:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:04,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207082729] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:22:04,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:22:04,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 75 [2022-09-20 21:22:04,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502742749] [2022-09-20 21:22:04,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:22:04,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-09-20 21:22:04,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:22:04,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-09-20 21:22:04,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=5256, Unknown=2, NotChecked=0, Total=5550 [2022-09-20 21:22:04,609 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 154 [2022-09-20 21:22:04,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 166 transitions, 634 flow. Second operand has 75 states, 75 states have (on average 70.52) internal successors, (5289), 75 states have internal predecessors, (5289), 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) [2022-09-20 21:22:04,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:22:04,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 154 [2022-09-20 21:22:04,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:22:13,453 INFO L130 PetriNetUnfolder]: 2140/5075 cut-off events. [2022-09-20 21:22:13,453 INFO L131 PetriNetUnfolder]: For 9650/9807 co-relation queries the response was YES. [2022-09-20 21:22:13,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14618 conditions, 5075 events. 2140/5075 cut-off events. For 9650/9807 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 41503 event pairs, 365 based on Foata normal form. 70/4954 useless extension candidates. Maximal degree in co-relation 14591. Up to 678 conditions per place. [2022-09-20 21:22:13,487 INFO L137 encePairwiseOnDemand]: 118/154 looper letters, 343 selfloop transitions, 114 changer transitions 79/595 dead transitions. [2022-09-20 21:22:13,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 595 transitions, 3610 flow [2022-09-20 21:22:13,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-09-20 21:22:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-09-20 21:22:13,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4842 transitions. [2022-09-20 21:22:13,496 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.49127435064935066 [2022-09-20 21:22:13,496 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4842 transitions. [2022-09-20 21:22:13,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4842 transitions. [2022-09-20 21:22:13,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:22:13,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4842 transitions. [2022-09-20 21:22:13,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 75.65625) internal successors, (4842), 64 states have internal predecessors, (4842), 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) [2022-09-20 21:22:13,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 154.0) internal successors, (10010), 65 states have internal predecessors, (10010), 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) [2022-09-20 21:22:13,516 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 154.0) internal successors, (10010), 65 states have internal predecessors, (10010), 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) [2022-09-20 21:22:13,516 INFO L175 Difference]: Start difference. First operand has 187 places, 166 transitions, 634 flow. Second operand 64 states and 4842 transitions. [2022-09-20 21:22:13,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 595 transitions, 3610 flow [2022-09-20 21:22:13,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 595 transitions, 3348 flow, removed 120 selfloop flow, removed 15 redundant places. [2022-09-20 21:22:13,565 INFO L231 Difference]: Finished difference. Result has 264 places, 248 transitions, 1606 flow [2022-09-20 21:22:13,565 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=1606, PETRI_PLACES=264, PETRI_TRANSITIONS=248} [2022-09-20 21:22:13,566 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 123 predicate places. [2022-09-20 21:22:13,566 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 248 transitions, 1606 flow [2022-09-20 21:22:13,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 70.52) internal successors, (5289), 75 states have internal predecessors, (5289), 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) [2022-09-20 21:22:13,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:22:13,568 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:22:13,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-09-20 21:22:13,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:13,785 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)] === [2022-09-20 21:22:13,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:22:13,786 INFO L85 PathProgramCache]: Analyzing trace with hash -674876392, now seen corresponding path program 5 times [2022-09-20 21:22:13,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:22:13,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643932913] [2022-09-20 21:22:13,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:13,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:22:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:15,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:22:15,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643932913] [2022-09-20 21:22:15,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643932913] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:22:15,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249891765] [2022-09-20 21:22:15,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 21:22:15,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:15,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:22:15,343 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) [2022-09-20 21:22:15,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-09-20 21:22:15,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-09-20 21:22:15,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:22:15,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 63 conjunts are in the unsatisfiable core [2022-09-20 21:22:15,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:22:15,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 21:22:15,628 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-09-20 21:22:15,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-09-20 21:22:16,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 33 treesize of output 33 [2022-09-20 21:22:16,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:22:16,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-09-20 21:22:16,865 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:22:16,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 20 [2022-09-20 21:22:16,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:16,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:22:17,430 WARN L833 $PredicateComparison]: unable to prove that (or (not (= (mod (select (select |c_#memory_int| c_~queue~0.base) (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296) (mod |c_thread2Thread1of1ForFork0_~x~1#1| 4294967296))) (not (< (+ c_~start~0 1) c_~n~0)) (not (< c_~end~0 c_~n~0)) (and (forall ((v_ArrVal_209 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_209) c_~queue~0.base)) (.cse3 (* c_~start~0 4))) (let ((.cse1 (select .cse2 (+ .cse3 c_~queue~0.offset 4))) (.cse0 (select .cse2 (+ .cse3 c_~queue~0.offset)))) (< (+ .cse0 (* 4294967296 (div .cse1 4294967296))) (+ .cse1 1 (* 4294967296 (div .cse0 4294967296))))))) (forall ((v_ArrVal_209 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_209) c_~queue~0.base)) (.cse7 (* c_~start~0 4))) (let ((.cse5 (select .cse6 (+ .cse7 c_~queue~0.offset))) (.cse4 (select .cse6 (+ .cse7 c_~queue~0.offset 4)))) (<= (+ .cse4 (* 4294967296 (div .cse5 4294967296))) (+ .cse5 (* 4294967296 (div .cse4 4294967296)))))))) (not (<= 0 c_~start~0)) (not (<= 0 c_~end~0))) is different from false [2022-09-20 21:22:17,688 INFO L356 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2022-09-20 21:22:17,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 234 treesize of output 202 [2022-09-20 21:22:17,703 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:22:17,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 109 [2022-09-20 21:22:17,711 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:22:17,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-09-20 21:22:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:20,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249891765] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:22:20,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:22:20,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 28, 28] total 82 [2022-09-20 21:22:20,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613569786] [2022-09-20 21:22:20,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:22:20,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-09-20 21:22:20,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:22:20,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-09-20 21:22:20,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=6100, Unknown=8, NotChecked=158, Total=6642 [2022-09-20 21:22:20,255 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-09-20 21:22:20,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 248 transitions, 1606 flow. Second operand has 82 states, 82 states have (on average 66.5) internal successors, (5453), 82 states have internal predecessors, (5453), 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) [2022-09-20 21:22:20,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:22:20,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-09-20 21:22:20,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:22:28,170 INFO L130 PetriNetUnfolder]: 2243/5388 cut-off events. [2022-09-20 21:22:28,170 INFO L131 PetriNetUnfolder]: For 34573/34821 co-relation queries the response was YES. [2022-09-20 21:22:28,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21303 conditions, 5388 events. 2243/5388 cut-off events. For 34573/34821 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 45059 event pairs, 792 based on Foata normal form. 59/5209 useless extension candidates. Maximal degree in co-relation 21248. Up to 1484 conditions per place. [2022-09-20 21:22:28,214 INFO L137 encePairwiseOnDemand]: 110/154 looper letters, 233 selfloop transitions, 109 changer transitions 23/422 dead transitions. [2022-09-20 21:22:28,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 422 transitions, 3412 flow [2022-09-20 21:22:28,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-09-20 21:22:28,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-09-20 21:22:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3213 transitions. [2022-09-20 21:22:28,218 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4535573122529644 [2022-09-20 21:22:28,218 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3213 transitions. [2022-09-20 21:22:28,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3213 transitions. [2022-09-20 21:22:28,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:22:28,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3213 transitions. [2022-09-20 21:22:28,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 69.84782608695652) internal successors, (3213), 46 states have internal predecessors, (3213), 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) [2022-09-20 21:22:28,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 154.0) internal successors, (7238), 47 states have internal predecessors, (7238), 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) [2022-09-20 21:22:28,228 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 154.0) internal successors, (7238), 47 states have internal predecessors, (7238), 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) [2022-09-20 21:22:28,228 INFO L175 Difference]: Start difference. First operand has 264 places, 248 transitions, 1606 flow. Second operand 46 states and 3213 transitions. [2022-09-20 21:22:28,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 422 transitions, 3412 flow [2022-09-20 21:22:28,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 422 transitions, 3077 flow, removed 134 selfloop flow, removed 29 redundant places. [2022-09-20 21:22:28,293 INFO L231 Difference]: Finished difference. Result has 283 places, 285 transitions, 2149 flow [2022-09-20 21:22:28,293 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1407, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=2149, PETRI_PLACES=283, PETRI_TRANSITIONS=285} [2022-09-20 21:22:28,293 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 142 predicate places. [2022-09-20 21:22:28,294 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 285 transitions, 2149 flow [2022-09-20 21:22:28,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 66.5) internal successors, (5453), 82 states have internal predecessors, (5453), 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) [2022-09-20 21:22:28,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:22:28,295 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:22:28,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-09-20 21:22:28,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:28,511 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)] === [2022-09-20 21:22:28,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:22:28,511 INFO L85 PathProgramCache]: Analyzing trace with hash 898526816, now seen corresponding path program 6 times [2022-09-20 21:22:28,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:22:28,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566746767] [2022-09-20 21:22:28,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:28,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:22:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:29,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:29,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:22:29,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566746767] [2022-09-20 21:22:29,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566746767] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:22:29,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449651981] [2022-09-20 21:22:29,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 21:22:29,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:29,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:22:29,233 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) [2022-09-20 21:22:29,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-09-20 21:22:29,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-09-20 21:22:29,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:22:29,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2022-09-20 21:22:29,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:22:29,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:22:29,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 34 [2022-09-20 21:22:29,894 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:22:29,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-09-20 21:22:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:22:29,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 21:22:29,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449651981] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:22:29,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 21:22:29,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [28] total 43 [2022-09-20 21:22:29,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368556637] [2022-09-20 21:22:29,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:22:29,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-09-20 21:22:29,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:22:29,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-09-20 21:22:29,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1700, Unknown=0, NotChecked=0, Total=1806 [2022-09-20 21:22:29,972 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-09-20 21:22:29,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 285 transitions, 2149 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 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) [2022-09-20 21:22:29,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:22:29,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-09-20 21:22:29,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:22:31,466 INFO L130 PetriNetUnfolder]: 2167/5301 cut-off events. [2022-09-20 21:22:31,467 INFO L131 PetriNetUnfolder]: For 42628/42791 co-relation queries the response was YES. [2022-09-20 21:22:31,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22843 conditions, 5301 events. 2167/5301 cut-off events. For 42628/42791 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 45213 event pairs, 701 based on Foata normal form. 84/5163 useless extension candidates. Maximal degree in co-relation 22784. Up to 2829 conditions per place. [2022-09-20 21:22:31,513 INFO L137 encePairwiseOnDemand]: 130/154 looper letters, 147 selfloop transitions, 65 changer transitions 56/352 dead transitions. [2022-09-20 21:22:31,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 352 transitions, 3189 flow [2022-09-20 21:22:31,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-20 21:22:31,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-20 21:22:31,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1880 transitions. [2022-09-20 21:22:31,515 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5813234384662956 [2022-09-20 21:22:31,515 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1880 transitions. [2022-09-20 21:22:31,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1880 transitions. [2022-09-20 21:22:31,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:22:31,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1880 transitions. [2022-09-20 21:22:31,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.52380952380952) internal successors, (1880), 21 states have internal predecessors, (1880), 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) [2022-09-20 21:22:31,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 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) [2022-09-20 21:22:31,520 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 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) [2022-09-20 21:22:31,520 INFO L175 Difference]: Start difference. First operand has 283 places, 285 transitions, 2149 flow. Second operand 21 states and 1880 transitions. [2022-09-20 21:22:31,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 352 transitions, 3189 flow [2022-09-20 21:22:31,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 352 transitions, 2966 flow, removed 78 selfloop flow, removed 26 redundant places. [2022-09-20 21:22:31,647 INFO L231 Difference]: Finished difference. Result has 284 places, 271 transitions, 2059 flow [2022-09-20 21:22:31,647 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2059, PETRI_PLACES=284, PETRI_TRANSITIONS=271} [2022-09-20 21:22:31,648 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 143 predicate places. [2022-09-20 21:22:31,648 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 271 transitions, 2059 flow [2022-09-20 21:22:31,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 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) [2022-09-20 21:22:31,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:22:31,648 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:22:31,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-09-20 21:22:31,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:31,864 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)] === [2022-09-20 21:22:31,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:22:31,864 INFO L85 PathProgramCache]: Analyzing trace with hash 858451822, now seen corresponding path program 7 times [2022-09-20 21:22:31,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:22:31,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170754505] [2022-09-20 21:22:31,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:31,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:22:31,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:32,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:32,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:22:32,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170754505] [2022-09-20 21:22:32,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170754505] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:22:32,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878530559] [2022-09-20 21:22:32,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 21:22:32,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:32,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:22:32,950 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) [2022-09-20 21:22:32,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-09-20 21:22:33,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:33,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 61 conjunts are in the unsatisfiable core [2022-09-20 21:22:33,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:22:33,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:22:33,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 23 [2022-09-20 21:22:34,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:22:34,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 23 [2022-09-20 21:22:34,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:22:34,393 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:22:34,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 17 [2022-09-20 21:22:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:34,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:22:35,041 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (+ c_~start~0 1) c_~n~0)) (not (< c_~end~0 c_~n~0)) (not (<= 0 c_~start~0)) (not (<= 0 c_~end~0)) (and (forall ((v_ArrVal_284 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_284) c_~queue~0.base))) (or (not (= 0 (mod (select .cse0 (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296))) (let ((.cse3 (* c_~start~0 4))) (let ((.cse1 (select .cse0 (+ .cse3 c_~queue~0.offset 4))) (.cse2 (select .cse0 (+ .cse3 c_~queue~0.offset)))) (< (+ (* (div .cse1 4294967296) 4294967296) .cse2) (+ .cse1 (* (div .cse2 4294967296) 4294967296) 1))))))) (forall ((v_ArrVal_284 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_284) c_~queue~0.base))) (or (let ((.cse7 (* c_~start~0 4))) (let ((.cse4 (select .cse6 (+ .cse7 c_~queue~0.offset 4))) (.cse5 (select .cse6 (+ .cse7 c_~queue~0.offset)))) (<= (+ .cse4 (* (div .cse5 4294967296) 4294967296)) (+ (* (div .cse4 4294967296) 4294967296) .cse5)))) (not (= 0 (mod (select .cse6 (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296)))))))) is different from false [2022-09-20 21:22:35,502 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-09-20 21:22:35,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 900 treesize of output 815 [2022-09-20 21:22:35,547 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-09-20 21:22:35,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 754 treesize of output 715 [2022-09-20 21:22:35,585 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-09-20 21:22:35,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 688 treesize of output 682 [2022-09-20 21:22:35,659 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-09-20 21:22:35,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 655 treesize of output 550 [2022-09-20 21:22:35,702 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-09-20 21:22:35,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 523 treesize of output 484 [2022-09-20 21:22:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:38,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878530559] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:22:38,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:22:38,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 30] total 82 [2022-09-20 21:22:38,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688819395] [2022-09-20 21:22:38,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:22:38,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-09-20 21:22:38,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:22:38,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-09-20 21:22:38,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=6033, Unknown=22, NotChecked=158, Total=6642 [2022-09-20 21:22:38,380 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2022-09-20 21:22:38,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 271 transitions, 2059 flow. Second operand has 82 states, 82 states have (on average 69.3170731707317) internal successors, (5684), 82 states have internal predecessors, (5684), 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) [2022-09-20 21:22:38,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:22:38,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2022-09-20 21:22:38,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:22:49,838 INFO L130 PetriNetUnfolder]: 2714/6541 cut-off events. [2022-09-20 21:22:49,838 INFO L131 PetriNetUnfolder]: For 65149/65482 co-relation queries the response was YES. [2022-09-20 21:22:49,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31094 conditions, 6541 events. 2714/6541 cut-off events. For 65149/65482 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 57234 event pairs, 364 based on Foata normal form. 88/6356 useless extension candidates. Maximal degree in co-relation 31028. Up to 950 conditions per place. [2022-09-20 21:22:49,891 INFO L137 encePairwiseOnDemand]: 113/154 looper letters, 383 selfloop transitions, 155 changer transitions 81/680 dead transitions. [2022-09-20 21:22:49,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 680 transitions, 6737 flow [2022-09-20 21:22:49,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-09-20 21:22:49,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-09-20 21:22:49,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 5247 transitions. [2022-09-20 21:22:49,902 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4798792756539235 [2022-09-20 21:22:49,903 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 5247 transitions. [2022-09-20 21:22:49,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 5247 transitions. [2022-09-20 21:22:49,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:22:49,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 5247 transitions. [2022-09-20 21:22:49,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 73.90140845070422) internal successors, (5247), 71 states have internal predecessors, (5247), 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) [2022-09-20 21:22:49,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 154.0) internal successors, (11088), 72 states have internal predecessors, (11088), 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) [2022-09-20 21:22:49,926 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 154.0) internal successors, (11088), 72 states have internal predecessors, (11088), 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) [2022-09-20 21:22:49,926 INFO L175 Difference]: Start difference. First operand has 284 places, 271 transitions, 2059 flow. Second operand 71 states and 5247 transitions. [2022-09-20 21:22:49,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 680 transitions, 6737 flow [2022-09-20 21:22:50,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 680 transitions, 5964 flow, removed 324 selfloop flow, removed 26 redundant places. [2022-09-20 21:22:50,035 INFO L231 Difference]: Finished difference. Result has 340 places, 323 transitions, 3225 flow [2022-09-20 21:22:50,035 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1884, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=3225, PETRI_PLACES=340, PETRI_TRANSITIONS=323} [2022-09-20 21:22:50,036 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 199 predicate places. [2022-09-20 21:22:50,036 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 323 transitions, 3225 flow [2022-09-20 21:22:50,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 69.3170731707317) internal successors, (5684), 82 states have internal predecessors, (5684), 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) [2022-09-20 21:22:50,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:22:50,037 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:22:50,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-09-20 21:22:50,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:50,251 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)] === [2022-09-20 21:22:50,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:22:50,252 INFO L85 PathProgramCache]: Analyzing trace with hash 527604950, now seen corresponding path program 8 times [2022-09-20 21:22:50,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:22:50,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291924052] [2022-09-20 21:22:50,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:50,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:22:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:52,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:22:52,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291924052] [2022-09-20 21:22:52,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291924052] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:22:52,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618843589] [2022-09-20 21:22:52,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:22:52,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:52,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:22:52,118 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) [2022-09-20 21:22:52,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-09-20 21:22:52,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-09-20 21:22:52,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:22:52,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjunts are in the unsatisfiable core [2022-09-20 21:22:52,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:22:52,804 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:22:52,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-09-20 21:22:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:22:52,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 21:22:52,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618843589] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:22:52,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 21:22:52,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [39] total 47 [2022-09-20 21:22:52,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158878375] [2022-09-20 21:22:52,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:22:52,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-09-20 21:22:52,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:22:52,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-09-20 21:22:52,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2017, Unknown=0, NotChecked=0, Total=2162 [2022-09-20 21:22:52,894 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2022-09-20 21:22:52,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 323 transitions, 3225 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 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) [2022-09-20 21:22:52,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:22:52,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2022-09-20 21:22:52,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:22:54,250 INFO L130 PetriNetUnfolder]: 2722/6398 cut-off events. [2022-09-20 21:22:54,250 INFO L131 PetriNetUnfolder]: For 75775/76654 co-relation queries the response was YES. [2022-09-20 21:22:54,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32193 conditions, 6398 events. 2722/6398 cut-off events. For 75775/76654 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 54837 event pairs, 875 based on Foata normal form. 90/6114 useless extension candidates. Maximal degree in co-relation 32112. Up to 4028 conditions per place. [2022-09-20 21:22:54,352 INFO L137 encePairwiseOnDemand]: 139/154 looper letters, 200 selfloop transitions, 64 changer transitions 39/404 dead transitions. [2022-09-20 21:22:54,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 404 transitions, 4532 flow [2022-09-20 21:22:54,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-09-20 21:22:54,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-09-20 21:22:54,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1395 transitions. [2022-09-20 21:22:54,368 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6968031968031968 [2022-09-20 21:22:54,369 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1395 transitions. [2022-09-20 21:22:54,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1395 transitions. [2022-09-20 21:22:54,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:22:54,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1395 transitions. [2022-09-20 21:22:54,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.3076923076923) internal successors, (1395), 13 states have internal predecessors, (1395), 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) [2022-09-20 21:22:54,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 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) [2022-09-20 21:22:54,375 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 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) [2022-09-20 21:22:54,375 INFO L175 Difference]: Start difference. First operand has 340 places, 323 transitions, 3225 flow. Second operand 13 states and 1395 transitions. [2022-09-20 21:22:54,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 404 transitions, 4532 flow [2022-09-20 21:22:54,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 404 transitions, 4041 flow, removed 183 selfloop flow, removed 47 redundant places. [2022-09-20 21:22:54,641 INFO L231 Difference]: Finished difference. Result has 300 places, 342 transitions, 3250 flow [2022-09-20 21:22:54,642 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2776, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3250, PETRI_PLACES=300, PETRI_TRANSITIONS=342} [2022-09-20 21:22:54,644 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 159 predicate places. [2022-09-20 21:22:54,644 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 342 transitions, 3250 flow [2022-09-20 21:22:54,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 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) [2022-09-20 21:22:54,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:22:54,644 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:22:54,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-09-20 21:22:54,851 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,SelfDestructingSolverStorable9 [2022-09-20 21:22:54,851 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)] === [2022-09-20 21:22:54,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:22:54,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1750272588, now seen corresponding path program 9 times [2022-09-20 21:22:54,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:22:54,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367581912] [2022-09-20 21:22:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:54,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:22:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:56,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:56,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:22:56,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367581912] [2022-09-20 21:22:56,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367581912] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:22:56,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439788210] [2022-09-20 21:22:56,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:22:56,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:56,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:22:56,457 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) [2022-09-20 21:22:56,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-09-20 21:22:56,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-09-20 21:22:56,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:22:56,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 42 conjunts are in the unsatisfiable core [2022-09-20 21:22:56,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:22:57,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:22:57,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 34 [2022-09-20 21:22:57,349 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:22:57,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-09-20 21:22:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:22:57,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 21:22:57,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439788210] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:22:57,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 21:22:57,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [35] total 50 [2022-09-20 21:22:57,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640696619] [2022-09-20 21:22:57,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:22:57,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-09-20 21:22:57,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:22:57,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-09-20 21:22:57,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2313, Unknown=0, NotChecked=0, Total=2450 [2022-09-20 21:22:57,443 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-09-20 21:22:57,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 342 transitions, 3250 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 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) [2022-09-20 21:22:57,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:22:57,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-09-20 21:22:57,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:22:59,132 INFO L130 PetriNetUnfolder]: 2743/6470 cut-off events. [2022-09-20 21:22:59,132 INFO L131 PetriNetUnfolder]: For 64690/65367 co-relation queries the response was YES. [2022-09-20 21:22:59,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30351 conditions, 6470 events. 2743/6470 cut-off events. For 64690/65367 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 55735 event pairs, 882 based on Foata normal form. 79/6179 useless extension candidates. Maximal degree in co-relation 30278. Up to 4008 conditions per place. [2022-09-20 21:22:59,197 INFO L137 encePairwiseOnDemand]: 132/154 looper letters, 210 selfloop transitions, 72 changer transitions 43/410 dead transitions. [2022-09-20 21:22:59,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 410 transitions, 4462 flow [2022-09-20 21:22:59,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-20 21:22:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-20 21:22:59,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1877 transitions. [2022-09-20 21:22:59,199 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5803957946815089 [2022-09-20 21:22:59,199 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1877 transitions. [2022-09-20 21:22:59,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1877 transitions. [2022-09-20 21:22:59,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:22:59,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1877 transitions. [2022-09-20 21:22:59,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.38095238095238) internal successors, (1877), 21 states have internal predecessors, (1877), 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) [2022-09-20 21:22:59,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 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) [2022-09-20 21:22:59,204 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 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) [2022-09-20 21:22:59,204 INFO L175 Difference]: Start difference. First operand has 300 places, 342 transitions, 3250 flow. Second operand 21 states and 1877 transitions. [2022-09-20 21:22:59,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 410 transitions, 4462 flow [2022-09-20 21:22:59,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 410 transitions, 4329 flow, removed 32 selfloop flow, removed 8 redundant places. [2022-09-20 21:22:59,329 INFO L231 Difference]: Finished difference. Result has 314 places, 343 transitions, 3323 flow [2022-09-20 21:22:59,330 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=3127, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3323, PETRI_PLACES=314, PETRI_TRANSITIONS=343} [2022-09-20 21:22:59,330 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 173 predicate places. [2022-09-20 21:22:59,330 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 343 transitions, 3323 flow [2022-09-20 21:22:59,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 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) [2022-09-20 21:22:59,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:22:59,331 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:22:59,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-09-20 21:22:59,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:59,550 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)] === [2022-09-20 21:22:59,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:22:59,550 INFO L85 PathProgramCache]: Analyzing trace with hash -166201082, now seen corresponding path program 10 times [2022-09-20 21:22:59,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:22:59,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146942050] [2022-09-20 21:22:59,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:59,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:22:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:23:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:01,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:23:01,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146942050] [2022-09-20 21:23:01,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146942050] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:23:01,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006735754] [2022-09-20 21:23:01,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:23:01,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:23:01,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:23:01,314 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) [2022-09-20 21:23:01,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-09-20 21:23:01,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:23:01,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:23:01,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 44 conjunts are in the unsatisfiable core [2022-09-20 21:23:01,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:23:02,140 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:23:02,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-09-20 21:23:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:02,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:23:02,654 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-09-20 21:23:02,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 134 treesize of output 101 [2022-09-20 21:23:09,148 WARN L233 SmtUtils]: Spent 6.23s on a formula simplification. DAG size of input: 72 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-09-20 21:23:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:09,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006735754] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:23:09,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:23:09,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 21, 21] total 71 [2022-09-20 21:23:09,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272361070] [2022-09-20 21:23:09,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:23:09,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-09-20 21:23:09,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:23:09,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-09-20 21:23:09,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=4605, Unknown=0, NotChecked=0, Total=4970 [2022-09-20 21:23:09,979 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2022-09-20 21:23:09,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 343 transitions, 3323 flow. Second operand has 71 states, 71 states have (on average 69.80281690140845) internal successors, (4956), 71 states have internal predecessors, (4956), 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) [2022-09-20 21:23:09,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:23:09,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2022-09-20 21:23:09,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:23:23,783 INFO L130 PetriNetUnfolder]: 3313/8064 cut-off events. [2022-09-20 21:23:23,783 INFO L131 PetriNetUnfolder]: For 80847/81481 co-relation queries the response was YES. [2022-09-20 21:23:23,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36577 conditions, 8064 events. 3313/8064 cut-off events. For 80847/81481 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 73975 event pairs, 841 based on Foata normal form. 71/7741 useless extension candidates. Maximal degree in co-relation 36502. Up to 2250 conditions per place. [2022-09-20 21:23:23,853 INFO L137 encePairwiseOnDemand]: 107/154 looper letters, 335 selfloop transitions, 177 changer transitions 122/694 dead transitions. [2022-09-20 21:23:23,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 694 transitions, 7168 flow [2022-09-20 21:23:23,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-09-20 21:23:23,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-09-20 21:23:23,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 5481 transitions. [2022-09-20 21:23:23,857 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.47454545454545455 [2022-09-20 21:23:23,857 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 5481 transitions. [2022-09-20 21:23:23,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 5481 transitions. [2022-09-20 21:23:23,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:23:23,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 5481 transitions. [2022-09-20 21:23:23,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 73.08) internal successors, (5481), 75 states have internal predecessors, (5481), 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) [2022-09-20 21:23:23,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 154.0) internal successors, (11704), 76 states have internal predecessors, (11704), 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) [2022-09-20 21:23:23,869 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 154.0) internal successors, (11704), 76 states have internal predecessors, (11704), 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) [2022-09-20 21:23:23,869 INFO L175 Difference]: Start difference. First operand has 314 places, 343 transitions, 3323 flow. Second operand 75 states and 5481 transitions. [2022-09-20 21:23:23,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 694 transitions, 7168 flow [2022-09-20 21:23:24,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 694 transitions, 6799 flow, removed 110 selfloop flow, removed 20 redundant places. [2022-09-20 21:23:24,031 INFO L231 Difference]: Finished difference. Result has 394 places, 393 transitions, 4484 flow [2022-09-20 21:23:24,031 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=3159, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=4484, PETRI_PLACES=394, PETRI_TRANSITIONS=393} [2022-09-20 21:23:24,032 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 253 predicate places. [2022-09-20 21:23:24,032 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 393 transitions, 4484 flow [2022-09-20 21:23:24,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 69.80281690140845) internal successors, (4956), 71 states have internal predecessors, (4956), 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) [2022-09-20 21:23:24,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:23:24,033 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:23:24,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-09-20 21:23:24,233 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,SelfDestructingSolverStorable11 [2022-09-20 21:23:24,233 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)] === [2022-09-20 21:23:24,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:23:24,234 INFO L85 PathProgramCache]: Analyzing trace with hash -28569236, now seen corresponding path program 11 times [2022-09-20 21:23:24,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:23:24,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398922075] [2022-09-20 21:23:24,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:23:24,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:23:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:23:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:24,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:23:24,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398922075] [2022-09-20 21:23:24,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398922075] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:23:24,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598386830] [2022-09-20 21:23:24,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 21:23:24,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:23:24,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:23:24,911 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) [2022-09-20 21:23:24,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-09-20 21:23:24,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-09-20 21:23:24,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:23:24,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 63 conjunts are in the unsatisfiable core [2022-09-20 21:23:24,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:23:25,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:23:25,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 22 [2022-09-20 21:23:26,176 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:23:26,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2022-09-20 21:23:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:26,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:23:26,705 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (+ c_~start~0 1) c_~n~0)) (not (< c_~end~0 c_~n~0)) (not (<= 0 c_~start~0)) (and (forall ((v_ArrVal_431 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_431) c_~queue~0.base))) (or (not (= (mod (select .cse0 (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296) (mod |c_thread1Thread1of1ForFork2_~x~0#1| 4294967296))) (let ((.cse3 (* c_~start~0 4))) (let ((.cse1 (select .cse0 (+ .cse3 c_~queue~0.offset 4))) (.cse2 (select .cse0 (+ .cse3 c_~queue~0.offset)))) (<= (+ .cse1 (* (div .cse2 4294967296) 4294967296)) (+ (* 4294967296 (div .cse1 4294967296)) .cse2))))))) (forall ((v_ArrVal_431 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_431) c_~queue~0.base))) (or (not (= (mod (select .cse4 (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296) (mod |c_thread1Thread1of1ForFork2_~x~0#1| 4294967296))) (let ((.cse7 (* c_~start~0 4))) (let ((.cse5 (select .cse4 (+ .cse7 c_~queue~0.offset 4))) (.cse6 (select .cse4 (+ .cse7 c_~queue~0.offset)))) (< (+ (* 4294967296 (div .cse5 4294967296)) .cse6) (+ .cse5 (* (div .cse6 4294967296) 4294967296) 1)))))))) (not (<= 0 c_~end~0))) is different from false [2022-09-20 21:23:26,841 INFO L356 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2022-09-20 21:23:26,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 300 treesize of output 260 [2022-09-20 21:23:26,883 INFO L356 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-09-20 21:23:26,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 199 treesize of output 194 [2022-09-20 21:23:26,923 INFO L356 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-09-20 21:23:26,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 167 treesize of output 162 [2022-09-20 21:23:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:29,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598386830] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:23:29,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:23:29,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 74 [2022-09-20 21:23:29,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318268777] [2022-09-20 21:23:29,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:23:29,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-09-20 21:23:29,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:23:29,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-09-20 21:23:29,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=4904, Unknown=1, NotChecked=142, Total=5402 [2022-09-20 21:23:29,650 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 154 [2022-09-20 21:23:29,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 393 transitions, 4484 flow. Second operand has 74 states, 74 states have (on average 70.58108108108108) internal successors, (5223), 74 states have internal predecessors, (5223), 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) [2022-09-20 21:23:29,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:23:29,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 154 [2022-09-20 21:23:29,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:23:35,706 INFO L130 PetriNetUnfolder]: 3726/8868 cut-off events. [2022-09-20 21:23:35,707 INFO L131 PetriNetUnfolder]: For 117495/118213 co-relation queries the response was YES. [2022-09-20 21:23:35,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45609 conditions, 8868 events. 3726/8868 cut-off events. For 117495/118213 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 81138 event pairs, 905 based on Foata normal form. 59/8456 useless extension candidates. Maximal degree in co-relation 45508. Up to 2065 conditions per place. [2022-09-20 21:23:35,799 INFO L137 encePairwiseOnDemand]: 115/154 looper letters, 335 selfloop transitions, 210 changer transitions 9/615 dead transitions. [2022-09-20 21:23:35,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 615 transitions, 7768 flow [2022-09-20 21:23:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-09-20 21:23:35,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-09-20 21:23:35,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3456 transitions. [2022-09-20 21:23:35,803 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4878599661208357 [2022-09-20 21:23:35,803 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3456 transitions. [2022-09-20 21:23:35,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3456 transitions. [2022-09-20 21:23:35,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:23:35,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3456 transitions. [2022-09-20 21:23:35,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 75.1304347826087) internal successors, (3456), 46 states have internal predecessors, (3456), 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) [2022-09-20 21:23:35,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 154.0) internal successors, (7238), 47 states have internal predecessors, (7238), 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) [2022-09-20 21:23:35,811 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 154.0) internal successors, (7238), 47 states have internal predecessors, (7238), 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) [2022-09-20 21:23:35,811 INFO L175 Difference]: Start difference. First operand has 394 places, 393 transitions, 4484 flow. Second operand 46 states and 3456 transitions. [2022-09-20 21:23:35,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 615 transitions, 7768 flow [2022-09-20 21:23:36,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 615 transitions, 6982 flow, removed 296 selfloop flow, removed 60 redundant places. [2022-09-20 21:23:36,192 INFO L231 Difference]: Finished difference. Result has 373 places, 451 transitions, 5339 flow [2022-09-20 21:23:36,192 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4040, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=5339, PETRI_PLACES=373, PETRI_TRANSITIONS=451} [2022-09-20 21:23:36,193 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 232 predicate places. [2022-09-20 21:23:36,193 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 451 transitions, 5339 flow [2022-09-20 21:23:36,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 70.58108108108108) internal successors, (5223), 74 states have internal predecessors, (5223), 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) [2022-09-20 21:23:36,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:23:36,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:23:36,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-09-20 21:23:36,399 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,SelfDestructingSolverStorable12 [2022-09-20 21:23:36,399 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)] === [2022-09-20 21:23:36,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:23:36,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1002490558, now seen corresponding path program 12 times [2022-09-20 21:23:36,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:23:36,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696538292] [2022-09-20 21:23:36,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:23:36,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:23:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:23:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:37,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:23:37,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696538292] [2022-09-20 21:23:37,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696538292] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:23:37,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509252764] [2022-09-20 21:23:37,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 21:23:37,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:23:37,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:23:37,898 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) [2022-09-20 21:23:37,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-09-20 21:23:38,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-09-20 21:23:38,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:23:38,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 42 conjunts are in the unsatisfiable core [2022-09-20 21:23:38,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:23:38,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:23:38,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 34 [2022-09-20 21:23:38,752 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:23:38,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-09-20 21:23:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:23:38,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 21:23:38,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509252764] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:23:38,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 21:23:38,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [35] total 50 [2022-09-20 21:23:38,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714667682] [2022-09-20 21:23:38,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:23:38,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-09-20 21:23:38,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:23:38,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-09-20 21:23:38,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2309, Unknown=0, NotChecked=0, Total=2450 [2022-09-20 21:23:38,842 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-09-20 21:23:38,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 451 transitions, 5339 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 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) [2022-09-20 21:23:38,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:23:38,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-09-20 21:23:38,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:23:41,535 INFO L130 PetriNetUnfolder]: 3785/9107 cut-off events. [2022-09-20 21:23:41,535 INFO L131 PetriNetUnfolder]: For 148808/149681 co-relation queries the response was YES. [2022-09-20 21:23:41,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52090 conditions, 9107 events. 3785/9107 cut-off events. For 148808/149681 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 84504 event pairs, 1403 based on Foata normal form. 79/8659 useless extension candidates. Maximal degree in co-relation 51999. Up to 5560 conditions per place. [2022-09-20 21:23:41,632 INFO L137 encePairwiseOnDemand]: 131/154 looper letters, 272 selfloop transitions, 90 changer transitions 77/524 dead transitions. [2022-09-20 21:23:41,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 524 transitions, 7089 flow [2022-09-20 21:23:41,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-20 21:23:41,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-20 21:23:41,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1880 transitions. [2022-09-20 21:23:41,634 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5813234384662956 [2022-09-20 21:23:41,634 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1880 transitions. [2022-09-20 21:23:41,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1880 transitions. [2022-09-20 21:23:41,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:23:41,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1880 transitions. [2022-09-20 21:23:41,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.52380952380952) internal successors, (1880), 21 states have internal predecessors, (1880), 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) [2022-09-20 21:23:41,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 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) [2022-09-20 21:23:41,638 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 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) [2022-09-20 21:23:41,638 INFO L175 Difference]: Start difference. First operand has 373 places, 451 transitions, 5339 flow. Second operand 21 states and 1880 transitions. [2022-09-20 21:23:41,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 524 transitions, 7089 flow [2022-09-20 21:23:41,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 524 transitions, 6695 flow, removed 134 selfloop flow, removed 29 redundant places. [2022-09-20 21:23:41,915 INFO L231 Difference]: Finished difference. Result has 369 places, 425 transitions, 4977 flow [2022-09-20 21:23:41,916 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4975, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4977, PETRI_PLACES=369, PETRI_TRANSITIONS=425} [2022-09-20 21:23:41,916 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 228 predicate places. [2022-09-20 21:23:41,916 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 425 transitions, 4977 flow [2022-09-20 21:23:41,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 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) [2022-09-20 21:23:41,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:23:41,916 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:23:41,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-09-20 21:23:42,117 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,SelfDestructingSolverStorable13 [2022-09-20 21:23:42,117 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)] === [2022-09-20 21:23:42,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:23:42,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1872516520, now seen corresponding path program 13 times [2022-09-20 21:23:42,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:23:42,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821553892] [2022-09-20 21:23:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:23:42,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:23:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:23:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:43,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:23:43,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821553892] [2022-09-20 21:23:43,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821553892] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:23:43,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483505796] [2022-09-20 21:23:43,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 21:23:43,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:23:43,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:23:43,959 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) [2022-09-20 21:23:43,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-09-20 21:23:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:23:44,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 43 conjunts are in the unsatisfiable core [2022-09-20 21:23:44,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:23:44,883 INFO L356 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2022-09-20 21:23:44,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 50 treesize of output 23 [2022-09-20 21:23:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:44,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:23:45,354 INFO L356 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2022-09-20 21:23:45,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 57 treesize of output 76 [2022-09-20 21:23:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:47,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483505796] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:23:47,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:23:47,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 21, 21] total 69 [2022-09-20 21:23:47,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082300987] [2022-09-20 21:23:47,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:23:47,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-09-20 21:23:47,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:23:47,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-09-20 21:23:47,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=4218, Unknown=0, NotChecked=0, Total=4692 [2022-09-20 21:23:47,108 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2022-09-20 21:23:47,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 425 transitions, 4977 flow. Second operand has 69 states, 69 states have (on average 69.8840579710145) internal successors, (4822), 69 states have internal predecessors, (4822), 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) [2022-09-20 21:23:47,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:23:47,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2022-09-20 21:23:47,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:23:55,711 INFO L130 PetriNetUnfolder]: 3951/9835 cut-off events. [2022-09-20 21:23:55,712 INFO L131 PetriNetUnfolder]: For 162137/162760 co-relation queries the response was YES. [2022-09-20 21:23:55,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56328 conditions, 9835 events. 3951/9835 cut-off events. For 162137/162760 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 93990 event pairs, 747 based on Foata normal form. 66/9450 useless extension candidates. Maximal degree in co-relation 56233. Up to 3510 conditions per place. [2022-09-20 21:23:55,813 INFO L137 encePairwiseOnDemand]: 110/154 looper letters, 315 selfloop transitions, 257 changer transitions 42/674 dead transitions. [2022-09-20 21:23:55,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 674 transitions, 9493 flow [2022-09-20 21:23:55,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-09-20 21:23:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-09-20 21:23:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3996 transitions. [2022-09-20 21:23:55,816 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4717827626918536 [2022-09-20 21:23:55,816 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3996 transitions. [2022-09-20 21:23:55,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3996 transitions. [2022-09-20 21:23:55,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:23:55,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3996 transitions. [2022-09-20 21:23:55,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 72.65454545454546) internal successors, (3996), 55 states have internal predecessors, (3996), 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) [2022-09-20 21:23:55,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 154.0) internal successors, (8624), 56 states have internal predecessors, (8624), 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) [2022-09-20 21:23:55,824 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 154.0) internal successors, (8624), 56 states have internal predecessors, (8624), 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) [2022-09-20 21:23:55,824 INFO L175 Difference]: Start difference. First operand has 369 places, 425 transitions, 4977 flow. Second operand 55 states and 3996 transitions. [2022-09-20 21:23:55,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 674 transitions, 9493 flow [2022-09-20 21:23:56,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 674 transitions, 9133 flow, removed 105 selfloop flow, removed 23 redundant places. [2022-09-20 21:23:56,135 INFO L231 Difference]: Finished difference. Result has 400 places, 527 transitions, 7121 flow [2022-09-20 21:23:56,135 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4797, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=7121, PETRI_PLACES=400, PETRI_TRANSITIONS=527} [2022-09-20 21:23:56,135 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 259 predicate places. [2022-09-20 21:23:56,136 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 527 transitions, 7121 flow [2022-09-20 21:23:56,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 69.8840579710145) internal successors, (4822), 69 states have internal predecessors, (4822), 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) [2022-09-20 21:23:56,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:23:56,136 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:23:56,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-09-20 21:23:56,337 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,SelfDestructingSolverStorable14 [2022-09-20 21:23:56,337 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)] === [2022-09-20 21:23:56,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:23:56,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1804420172, now seen corresponding path program 14 times [2022-09-20 21:23:56,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:23:56,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729786949] [2022-09-20 21:23:56,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:23:56,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:23:56,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:23:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:58,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:23:58,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729786949] [2022-09-20 21:23:58,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729786949] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:23:58,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826014567] [2022-09-20 21:23:58,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:23:58,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:23:58,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:23:58,248 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) [2022-09-20 21:23:58,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-09-20 21:23:58,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-09-20 21:23:58,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:23:58,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjunts are in the unsatisfiable core [2022-09-20 21:23:58,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:23:58,794 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:23:58,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-09-20 21:23:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:23:58,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 21:23:58,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826014567] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:23:58,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 21:23:58,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [38] total 46 [2022-09-20 21:23:58,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439869429] [2022-09-20 21:23:58,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:23:58,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-09-20 21:23:58,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:23:58,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-09-20 21:23:58,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1934, Unknown=0, NotChecked=0, Total=2070 [2022-09-20 21:23:58,874 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2022-09-20 21:23:58,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 527 transitions, 7121 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 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) [2022-09-20 21:23:58,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:23:58,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2022-09-20 21:23:58,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:24:01,273 INFO L130 PetriNetUnfolder]: 3982/9926 cut-off events. [2022-09-20 21:24:01,273 INFO L131 PetriNetUnfolder]: For 175148/176403 co-relation queries the response was YES. [2022-09-20 21:24:01,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58141 conditions, 9926 events. 3982/9926 cut-off events. For 175148/176403 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 95520 event pairs, 1561 based on Foata normal form. 127/9485 useless extension candidates. Maximal degree in co-relation 58043. Up to 6366 conditions per place. [2022-09-20 21:24:01,385 INFO L137 encePairwiseOnDemand]: 139/154 looper letters, 385 selfloop transitions, 72 changer transitions 41/599 dead transitions. [2022-09-20 21:24:01,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 599 transitions, 9051 flow [2022-09-20 21:24:01,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-09-20 21:24:01,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-09-20 21:24:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1393 transitions. [2022-09-20 21:24:01,386 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6958041958041958 [2022-09-20 21:24:01,386 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1393 transitions. [2022-09-20 21:24:01,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1393 transitions. [2022-09-20 21:24:01,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:24:01,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1393 transitions. [2022-09-20 21:24:01,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 107.15384615384616) internal successors, (1393), 13 states have internal predecessors, (1393), 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) [2022-09-20 21:24:01,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 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) [2022-09-20 21:24:01,389 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 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) [2022-09-20 21:24:01,389 INFO L175 Difference]: Start difference. First operand has 400 places, 527 transitions, 7121 flow. Second operand 13 states and 1393 transitions. [2022-09-20 21:24:01,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 599 transitions, 9051 flow [2022-09-20 21:24:01,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 599 transitions, 8599 flow, removed 185 selfloop flow, removed 34 redundant places. [2022-09-20 21:24:01,837 INFO L231 Difference]: Finished difference. Result has 379 places, 535 transitions, 7056 flow [2022-09-20 21:24:01,837 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6685, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7056, PETRI_PLACES=379, PETRI_TRANSITIONS=535} [2022-09-20 21:24:01,837 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 238 predicate places. [2022-09-20 21:24:01,838 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 535 transitions, 7056 flow [2022-09-20 21:24:01,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 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) [2022-09-20 21:24:01,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:24:01,838 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:24:01,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-09-20 21:24:02,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:24:02,043 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)] === [2022-09-20 21:24:02,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:24:02,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1028734836, now seen corresponding path program 15 times [2022-09-20 21:24:02,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:24:02,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83881988] [2022-09-20 21:24:02,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:24:02,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:24:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:24:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:24:03,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:24:03,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83881988] [2022-09-20 21:24:03,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83881988] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:24:03,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949295481] [2022-09-20 21:24:03,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:24:03,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:24:03,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:24:03,301 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) [2022-09-20 21:24:03,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-09-20 21:24:03,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-09-20 21:24:03,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:24:03,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2022-09-20 21:24:03,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:24:03,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:24:03,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 23 [2022-09-20 21:24:04,118 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:24:04,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-09-20 21:24:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:24:04,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 21:24:04,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949295481] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:24:04,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 21:24:04,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [34] total 49 [2022-09-20 21:24:04,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806428555] [2022-09-20 21:24:04,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:24:04,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-09-20 21:24:04,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:24:04,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-09-20 21:24:04,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2218, Unknown=0, NotChecked=0, Total=2352 [2022-09-20 21:24:04,223 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-09-20 21:24:04,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 535 transitions, 7056 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 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) [2022-09-20 21:24:04,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:24:04,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-09-20 21:24:04,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:24:07,080 INFO L130 PetriNetUnfolder]: 4029/10013 cut-off events. [2022-09-20 21:24:07,080 INFO L131 PetriNetUnfolder]: For 169937/171095 co-relation queries the response was YES. [2022-09-20 21:24:07,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57875 conditions, 10013 events. 4029/10013 cut-off events. For 169937/171095 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 96529 event pairs, 1557 based on Foata normal form. 104/9551 useless extension candidates. Maximal degree in co-relation 57776. Up to 6335 conditions per place. [2022-09-20 21:24:07,261 INFO L137 encePairwiseOnDemand]: 131/154 looper letters, 392 selfloop transitions, 84 changer transitions 48/609 dead transitions. [2022-09-20 21:24:07,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 609 transitions, 9042 flow [2022-09-20 21:24:07,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-20 21:24:07,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-20 21:24:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1875 transitions. [2022-09-20 21:24:07,263 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5797773654916512 [2022-09-20 21:24:07,263 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1875 transitions. [2022-09-20 21:24:07,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1875 transitions. [2022-09-20 21:24:07,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:24:07,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1875 transitions. [2022-09-20 21:24:07,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.28571428571429) internal successors, (1875), 21 states have internal predecessors, (1875), 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) [2022-09-20 21:24:07,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 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) [2022-09-20 21:24:07,267 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 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) [2022-09-20 21:24:07,267 INFO L175 Difference]: Start difference. First operand has 379 places, 535 transitions, 7056 flow. Second operand 21 states and 1875 transitions. [2022-09-20 21:24:07,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 609 transitions, 9042 flow [2022-09-20 21:24:07,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 609 transitions, 8769 flow, removed 35 selfloop flow, removed 12 redundant places. [2022-09-20 21:24:07,666 INFO L231 Difference]: Finished difference. Result has 389 places, 539 transitions, 7118 flow [2022-09-20 21:24:07,666 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6810, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7118, PETRI_PLACES=389, PETRI_TRANSITIONS=539} [2022-09-20 21:24:07,666 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 248 predicate places. [2022-09-20 21:24:07,667 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 539 transitions, 7118 flow [2022-09-20 21:24:07,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 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) [2022-09-20 21:24:07,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:24:07,667 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:24:07,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-09-20 21:24:07,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-09-20 21:24:07,871 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)] === [2022-09-20 21:24:07,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:24:07,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1080378684, now seen corresponding path program 16 times [2022-09-20 21:24:07,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:24:07,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143106491] [2022-09-20 21:24:07,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:24:07,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:24:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:24:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:24:09,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:24:09,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143106491] [2022-09-20 21:24:09,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143106491] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:24:09,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999625683] [2022-09-20 21:24:09,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:24:09,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:24:09,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:24:09,282 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) [2022-09-20 21:24:09,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-09-20 21:24:09,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:24:09,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:24:09,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 51 conjunts are in the unsatisfiable core [2022-09-20 21:24:09,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:24:10,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:24:10,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 34 [2022-09-20 21:24:10,467 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:24:10,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-09-20 21:24:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:24:10,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:24:11,077 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-09-20 21:24:11,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 87 treesize of output 105 [2022-09-20 21:24:11,212 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:24:11,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2022-09-20 21:24:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:24:12,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999625683] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:24:12,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:24:12,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 28, 28] total 83 [2022-09-20 21:24:12,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109173938] [2022-09-20 21:24:12,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:24:12,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-09-20 21:24:12,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:24:12,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-09-20 21:24:12,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=6471, Unknown=1, NotChecked=0, Total=6806 [2022-09-20 21:24:12,502 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-09-20 21:24:12,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 539 transitions, 7118 flow. Second operand has 83 states, 83 states have (on average 66.46987951807229) internal successors, (5517), 83 states have internal predecessors, (5517), 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) [2022-09-20 21:24:12,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:24:12,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-09-20 21:24:12,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:24:23,766 INFO L130 PetriNetUnfolder]: 4239/10600 cut-off events. [2022-09-20 21:24:23,767 INFO L131 PetriNetUnfolder]: For 175880/176819 co-relation queries the response was YES. [2022-09-20 21:24:23,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60974 conditions, 10600 events. 4239/10600 cut-off events. For 175880/176819 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 103773 event pairs, 1492 based on Foata normal form. 130/10224 useless extension candidates. Maximal degree in co-relation 60874. Up to 3392 conditions per place. [2022-09-20 21:24:23,961 INFO L137 encePairwiseOnDemand]: 113/154 looper letters, 453 selfloop transitions, 156 changer transitions 90/756 dead transitions. [2022-09-20 21:24:23,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 756 transitions, 10809 flow [2022-09-20 21:24:23,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-09-20 21:24:23,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-09-20 21:24:23,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 4241 transitions. [2022-09-20 21:24:23,964 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4514583776878859 [2022-09-20 21:24:23,964 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 4241 transitions. [2022-09-20 21:24:23,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 4241 transitions. [2022-09-20 21:24:23,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:24:23,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 4241 transitions. [2022-09-20 21:24:23,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 69.52459016393442) internal successors, (4241), 61 states have internal predecessors, (4241), 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) [2022-09-20 21:24:23,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 154.0) internal successors, (9548), 62 states have internal predecessors, (9548), 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) [2022-09-20 21:24:23,973 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 154.0) internal successors, (9548), 62 states have internal predecessors, (9548), 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) [2022-09-20 21:24:23,973 INFO L175 Difference]: Start difference. First operand has 389 places, 539 transitions, 7118 flow. Second operand 61 states and 4241 transitions. [2022-09-20 21:24:23,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 756 transitions, 10809 flow [2022-09-20 21:24:24,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 756 transitions, 10554 flow, removed 51 selfloop flow, removed 20 redundant places. [2022-09-20 21:24:24,447 INFO L231 Difference]: Finished difference. Result has 441 places, 542 transitions, 7377 flow [2022-09-20 21:24:24,448 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6948, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=7377, PETRI_PLACES=441, PETRI_TRANSITIONS=542} [2022-09-20 21:24:24,448 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 300 predicate places. [2022-09-20 21:24:24,448 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 542 transitions, 7377 flow [2022-09-20 21:24:24,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 66.46987951807229) internal successors, (5517), 83 states have internal predecessors, (5517), 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) [2022-09-20 21:24:24,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:24:24,449 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:24:24,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-09-20 21:24:24,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-09-20 21:24:24,654 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)] === [2022-09-20 21:24:24,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:24:24,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1325681642, now seen corresponding path program 17 times [2022-09-20 21:24:24,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:24:24,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092585735] [2022-09-20 21:24:24,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:24:24,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:24:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:24:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:24:26,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:24:26,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092585735] [2022-09-20 21:24:26,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092585735] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:24:26,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299255906] [2022-09-20 21:24:26,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 21:24:26,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:24:26,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:24:26,431 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:24:26,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-09-20 21:24:26,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-09-20 21:24:26,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:24:26,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 55 conjunts are in the unsatisfiable core [2022-09-20 21:24:26,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:24:27,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:24:27,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 33 treesize of output 33 [2022-09-20 21:24:27,956 INFO L356 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2022-09-20 21:24:27,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 50 treesize of output 23 [2022-09-20 21:24:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:24:28,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:24:28,584 INFO L356 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2022-09-20 21:24:28,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 86 treesize of output 105 [2022-09-20 21:24:28,588 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:24:28,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2022-09-20 21:24:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:24:30,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299255906] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:24:30,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:24:30,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 28, 28] total 87 [2022-09-20 21:24:30,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570447915] [2022-09-20 21:24:30,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:24:30,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-09-20 21:24:30,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:24:30,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-09-20 21:24:30,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=7064, Unknown=1, NotChecked=0, Total=7482 [2022-09-20 21:24:30,823 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2022-09-20 21:24:30,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 542 transitions, 7377 flow. Second operand has 87 states, 87 states have (on average 69.32183908045977) internal successors, (6031), 87 states have internal predecessors, (6031), 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) [2022-09-20 21:24:30,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:24:30,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2022-09-20 21:24:30,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:24:49,013 INFO L130 PetriNetUnfolder]: 4315/10930 cut-off events. [2022-09-20 21:24:49,013 INFO L131 PetriNetUnfolder]: For 195149/196110 co-relation queries the response was YES. [2022-09-20 21:24:49,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65170 conditions, 10930 events. 4315/10930 cut-off events. For 195149/196110 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 107943 event pairs, 1322 based on Foata normal form. 95/10507 useless extension candidates. Maximal degree in co-relation 65059. Up to 3346 conditions per place. [2022-09-20 21:24:49,146 INFO L137 encePairwiseOnDemand]: 108/154 looper letters, 416 selfloop transitions, 201 changer transitions 70/747 dead transitions. [2022-09-20 21:24:49,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 747 transitions, 11068 flow [2022-09-20 21:24:49,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-09-20 21:24:49,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-09-20 21:24:49,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 5080 transitions. [2022-09-20 21:24:49,149 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.46460581671849277 [2022-09-20 21:24:49,149 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 5080 transitions. [2022-09-20 21:24:49,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 5080 transitions. [2022-09-20 21:24:49,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:24:49,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 5080 transitions. [2022-09-20 21:24:49,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 71.54929577464789) internal successors, (5080), 71 states have internal predecessors, (5080), 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) [2022-09-20 21:24:49,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 154.0) internal successors, (11088), 72 states have internal predecessors, (11088), 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) [2022-09-20 21:24:49,160 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 154.0) internal successors, (11088), 72 states have internal predecessors, (11088), 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) [2022-09-20 21:24:49,160 INFO L175 Difference]: Start difference. First operand has 441 places, 542 transitions, 7377 flow. Second operand 71 states and 5080 transitions. [2022-09-20 21:24:49,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 747 transitions, 11068 flow [2022-09-20 21:24:49,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 747 transitions, 10597 flow, removed 133 selfloop flow, removed 51 redundant places. [2022-09-20 21:24:49,655 INFO L231 Difference]: Finished difference. Result has 461 places, 554 transitions, 7658 flow [2022-09-20 21:24:49,656 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=7091, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=7658, PETRI_PLACES=461, PETRI_TRANSITIONS=554} [2022-09-20 21:24:49,656 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 320 predicate places. [2022-09-20 21:24:49,656 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 554 transitions, 7658 flow [2022-09-20 21:24:49,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 69.32183908045977) internal successors, (6031), 87 states have internal predecessors, (6031), 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) [2022-09-20 21:24:49,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:24:49,657 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:24:49,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-09-20 21:24:49,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:24:49,857 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)] === [2022-09-20 21:24:49,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:24:49,858 INFO L85 PathProgramCache]: Analyzing trace with hash 519171818, now seen corresponding path program 18 times [2022-09-20 21:24:49,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:24:49,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517632499] [2022-09-20 21:24:49,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:24:49,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:24:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:24:50,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:24:50,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:24:50,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517632499] [2022-09-20 21:24:50,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517632499] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:24:50,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284518589] [2022-09-20 21:24:50,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 21:24:50,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:24:50,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:24:50,768 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:24:50,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-09-20 21:24:50,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-09-20 21:24:50,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:24:50,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 31 conjunts are in the unsatisfiable core [2022-09-20 21:24:50,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:24:51,135 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:24:51,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-09-20 21:24:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:24:51,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 21:24:51,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284518589] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:24:51,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 21:24:51,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [32] total 40 [2022-09-20 21:24:51,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393049949] [2022-09-20 21:24:51,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:24:51,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-09-20 21:24:51,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:24:51,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-09-20 21:24:51,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1449, Unknown=0, NotChecked=0, Total=1560 [2022-09-20 21:24:51,210 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 154 [2022-09-20 21:24:51,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 554 transitions, 7658 flow. Second operand has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 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) [2022-09-20 21:24:51,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:24:51,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 154 [2022-09-20 21:24:51,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:24:54,105 INFO L130 PetriNetUnfolder]: 4347/11076 cut-off events. [2022-09-20 21:24:54,105 INFO L131 PetriNetUnfolder]: For 224390/225574 co-relation queries the response was YES. [2022-09-20 21:24:54,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69515 conditions, 11076 events. 4347/11076 cut-off events. For 224390/225574 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 110722 event pairs, 1773 based on Foata normal form. 84/10567 useless extension candidates. Maximal degree in co-relation 69404. Up to 7062 conditions per place. [2022-09-20 21:24:54,242 INFO L137 encePairwiseOnDemand]: 139/154 looper letters, 401 selfloop transitions, 77 changer transitions 58/639 dead transitions. [2022-09-20 21:24:54,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 639 transitions, 9927 flow [2022-09-20 21:24:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-09-20 21:24:54,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-09-20 21:24:54,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1388 transitions. [2022-09-20 21:24:54,243 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6933066933066933 [2022-09-20 21:24:54,243 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1388 transitions. [2022-09-20 21:24:54,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1388 transitions. [2022-09-20 21:24:54,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:24:54,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1388 transitions. [2022-09-20 21:24:54,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 106.76923076923077) internal successors, (1388), 13 states have internal predecessors, (1388), 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) [2022-09-20 21:24:54,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 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) [2022-09-20 21:24:54,246 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 154.0) internal successors, (2156), 14 states have internal predecessors, (2156), 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) [2022-09-20 21:24:54,246 INFO L175 Difference]: Start difference. First operand has 461 places, 554 transitions, 7658 flow. Second operand 13 states and 1388 transitions. [2022-09-20 21:24:54,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 639 transitions, 9927 flow [2022-09-20 21:24:54,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 639 transitions, 9642 flow, removed 59 selfloop flow, removed 49 redundant places. [2022-09-20 21:24:54,790 INFO L231 Difference]: Finished difference. Result has 415 places, 563 transitions, 7785 flow [2022-09-20 21:24:54,790 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=7417, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7785, PETRI_PLACES=415, PETRI_TRANSITIONS=563} [2022-09-20 21:24:54,791 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 274 predicate places. [2022-09-20 21:24:54,791 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 563 transitions, 7785 flow [2022-09-20 21:24:54,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 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) [2022-09-20 21:24:54,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:24:54,791 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:24:54,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-09-20 21:24:55,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:24:55,010 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:24:55,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:24:55,011 INFO L85 PathProgramCache]: Analyzing trace with hash -664872168, now seen corresponding path program 19 times [2022-09-20 21:24:55,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:24:55,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222851783] [2022-09-20 21:24:55,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:24:55,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:24:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:24:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:24:55,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:24:55,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222851783] [2022-09-20 21:24:55,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222851783] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:24:55,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176414091] [2022-09-20 21:24:55,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 21:24:55,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:24:55,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:24:55,941 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:24:55,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-09-20 21:24:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:24:56,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 55 conjunts are in the unsatisfiable core [2022-09-20 21:24:56,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:24:56,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:24:56,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 22 [2022-09-20 21:24:57,188 INFO L356 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2022-09-20 21:24:57,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 50 treesize of output 23 [2022-09-20 21:24:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:24:57,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:24:57,944 INFO L356 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2022-09-20 21:24:57,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 152 treesize of output 154 [2022-09-20 21:24:57,972 INFO L356 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-09-20 21:24:57,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 68 [2022-09-20 21:24:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:24:59,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176414091] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:24:59,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:24:59,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28, 28] total 79 [2022-09-20 21:24:59,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414484879] [2022-09-20 21:24:59,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:24:59,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-09-20 21:24:59,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:24:59,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-09-20 21:24:59,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=5778, Unknown=1, NotChecked=0, Total=6162 [2022-09-20 21:24:59,975 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 154 [2022-09-20 21:24:59,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 563 transitions, 7785 flow. Second operand has 79 states, 79 states have (on average 71.40506329113924) internal successors, (5641), 79 states have internal predecessors, (5641), 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) [2022-09-20 21:24:59,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:24:59,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 154 [2022-09-20 21:24:59,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:25:09,786 INFO L130 PetriNetUnfolder]: 4443/11419 cut-off events. [2022-09-20 21:25:09,786 INFO L131 PetriNetUnfolder]: For 227677/228365 co-relation queries the response was YES. [2022-09-20 21:25:09,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69922 conditions, 11419 events. 4443/11419 cut-off events. For 227677/228365 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 114287 event pairs, 889 based on Foata normal form. 108/11031 useless extension candidates. Maximal degree in co-relation 69816. Up to 4074 conditions per place. [2022-09-20 21:25:09,931 INFO L137 encePairwiseOnDemand]: 112/154 looper letters, 381 selfloop transitions, 400 changer transitions 10/857 dead transitions. [2022-09-20 21:25:09,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 857 transitions, 13948 flow [2022-09-20 21:25:09,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-09-20 21:25:09,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-09-20 21:25:09,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 4690 transitions. [2022-09-20 21:25:09,935 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4834054834054834 [2022-09-20 21:25:09,935 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 4690 transitions. [2022-09-20 21:25:09,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 4690 transitions. [2022-09-20 21:25:09,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:25:09,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 4690 transitions. [2022-09-20 21:25:09,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 74.44444444444444) internal successors, (4690), 63 states have internal predecessors, (4690), 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) [2022-09-20 21:25:09,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 154.0) internal successors, (9856), 64 states have internal predecessors, (9856), 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) [2022-09-20 21:25:09,944 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 154.0) internal successors, (9856), 64 states have internal predecessors, (9856), 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) [2022-09-20 21:25:09,944 INFO L175 Difference]: Start difference. First operand has 415 places, 563 transitions, 7785 flow. Second operand 63 states and 4690 transitions. [2022-09-20 21:25:09,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 857 transitions, 13948 flow [2022-09-20 21:25:10,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 857 transitions, 13771 flow, removed 58 selfloop flow, removed 8 redundant places. [2022-09-20 21:25:10,549 INFO L231 Difference]: Finished difference. Result has 481 places, 731 transitions, 11502 flow [2022-09-20 21:25:10,550 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=7652, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=11502, PETRI_PLACES=481, PETRI_TRANSITIONS=731} [2022-09-20 21:25:10,550 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 340 predicate places. [2022-09-20 21:25:10,550 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 731 transitions, 11502 flow [2022-09-20 21:25:10,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 71.40506329113924) internal successors, (5641), 79 states have internal predecessors, (5641), 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) [2022-09-20 21:25:10,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:25:10,551 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:25:10,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-09-20 21:25:10,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:25:10,751 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:25:10,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:25:10,752 INFO L85 PathProgramCache]: Analyzing trace with hash -298391818, now seen corresponding path program 20 times [2022-09-20 21:25:10,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:25:10,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680207975] [2022-09-20 21:25:10,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:25:10,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:25:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:25:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:25:12,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:25:12,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680207975] [2022-09-20 21:25:12,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680207975] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:25:12,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826422334] [2022-09-20 21:25:12,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:25:12,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:25:12,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:25:12,345 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:25:12,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-09-20 21:25:12,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-09-20 21:25:12,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:25:12,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 42 conjunts are in the unsatisfiable core [2022-09-20 21:25:12,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:25:13,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:25:13,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 22 [2022-09-20 21:25:13,214 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:25:13,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-09-20 21:25:13,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:25:13,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 21:25:13,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826422334] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:25:13,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 21:25:13,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [38] total 53 [2022-09-20 21:25:13,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538647253] [2022-09-20 21:25:13,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:25:13,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-09-20 21:25:13,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:25:13,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-09-20 21:25:13,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2605, Unknown=0, NotChecked=0, Total=2756 [2022-09-20 21:25:13,305 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-09-20 21:25:13,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 731 transitions, 11502 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 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) [2022-09-20 21:25:13,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:25:13,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-09-20 21:25:13,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:25:17,128 INFO L130 PetriNetUnfolder]: 4487/11494 cut-off events. [2022-09-20 21:25:17,128 INFO L131 PetriNetUnfolder]: For 348561/349800 co-relation queries the response was YES. [2022-09-20 21:25:17,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85188 conditions, 11494 events. 4487/11494 cut-off events. For 348561/349800 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 115632 event pairs, 1728 based on Foata normal form. 98/10984 useless extension candidates. Maximal degree in co-relation 85069. Up to 7070 conditions per place. [2022-09-20 21:25:17,313 INFO L137 encePairwiseOnDemand]: 131/154 looper letters, 506 selfloop transitions, 93 changer transitions 122/808 dead transitions. [2022-09-20 21:25:17,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 808 transitions, 14198 flow [2022-09-20 21:25:17,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-20 21:25:17,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-20 21:25:17,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1870 transitions. [2022-09-20 21:25:17,315 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2022-09-20 21:25:17,315 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1870 transitions. [2022-09-20 21:25:17,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1870 transitions. [2022-09-20 21:25:17,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:25:17,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1870 transitions. [2022-09-20 21:25:17,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.04761904761905) internal successors, (1870), 21 states have internal predecessors, (1870), 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) [2022-09-20 21:25:17,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 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) [2022-09-20 21:25:17,318 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 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) [2022-09-20 21:25:17,318 INFO L175 Difference]: Start difference. First operand has 481 places, 731 transitions, 11502 flow. Second operand 21 states and 1870 transitions. [2022-09-20 21:25:17,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 808 transitions, 14198 flow [2022-09-20 21:25:18,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 808 transitions, 13300 flow, removed 332 selfloop flow, removed 31 redundant places. [2022-09-20 21:25:18,073 INFO L231 Difference]: Finished difference. Result has 476 places, 670 transitions, 10353 flow [2022-09-20 21:25:18,074 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=10652, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=10353, PETRI_PLACES=476, PETRI_TRANSITIONS=670} [2022-09-20 21:25:18,074 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 335 predicate places. [2022-09-20 21:25:18,074 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 670 transitions, 10353 flow [2022-09-20 21:25:18,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 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) [2022-09-20 21:25:18,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:25:18,074 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:25:18,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-09-20 21:25:18,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-09-20 21:25:18,275 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:25:18,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:25:18,275 INFO L85 PathProgramCache]: Analyzing trace with hash -362581732, now seen corresponding path program 21 times [2022-09-20 21:25:18,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:25:18,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389284975] [2022-09-20 21:25:18,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:25:18,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:25:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:25:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:25:20,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:25:20,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389284975] [2022-09-20 21:25:20,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389284975] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:25:20,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56646506] [2022-09-20 21:25:20,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:25:20,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:25:20,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:25:20,155 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:25:20,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-09-20 21:25:20,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-09-20 21:25:20,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:25:20,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 44 conjunts are in the unsatisfiable core [2022-09-20 21:25:20,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:25:21,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:25:21,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 34 [2022-09-20 21:25:21,176 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:25:21,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-09-20 21:25:21,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:25:21,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 21:25:21,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56646506] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:25:21,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 21:25:21,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [38] total 53 [2022-09-20 21:25:21,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110422540] [2022-09-20 21:25:21,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:25:21,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-09-20 21:25:21,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:25:21,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-09-20 21:25:21,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2605, Unknown=0, NotChecked=0, Total=2756 [2022-09-20 21:25:21,270 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 154 [2022-09-20 21:25:21,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 670 transitions, 10353 flow. Second operand has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 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) [2022-09-20 21:25:21,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:25:21,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 154 [2022-09-20 21:25:21,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:25:24,831 INFO L130 PetriNetUnfolder]: 4406/11205 cut-off events. [2022-09-20 21:25:24,831 INFO L131 PetriNetUnfolder]: For 347074/348302 co-relation queries the response was YES. [2022-09-20 21:25:24,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84389 conditions, 11205 events. 4406/11205 cut-off events. For 347074/348302 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 111990 event pairs, 1710 based on Foata normal form. 94/10698 useless extension candidates. Maximal degree in co-relation 84265. Up to 7059 conditions per place. [2022-09-20 21:25:24,989 INFO L137 encePairwiseOnDemand]: 132/154 looper letters, 504 selfloop transitions, 89 changer transitions 52/732 dead transitions. [2022-09-20 21:25:24,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 732 transitions, 12710 flow [2022-09-20 21:25:24,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-20 21:25:24,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-20 21:25:24,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1870 transitions. [2022-09-20 21:25:24,991 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2022-09-20 21:25:24,991 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1870 transitions. [2022-09-20 21:25:24,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1870 transitions. [2022-09-20 21:25:24,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:25:24,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1870 transitions. [2022-09-20 21:25:24,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.04761904761905) internal successors, (1870), 21 states have internal predecessors, (1870), 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) [2022-09-20 21:25:25,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 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) [2022-09-20 21:25:25,059 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 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) [2022-09-20 21:25:25,059 INFO L175 Difference]: Start difference. First operand has 476 places, 670 transitions, 10353 flow. Second operand 21 states and 1870 transitions. [2022-09-20 21:25:25,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 732 transitions, 12710 flow [2022-09-20 21:25:25,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 732 transitions, 12234 flow, removed 160 selfloop flow, removed 29 redundant places. [2022-09-20 21:25:25,902 INFO L231 Difference]: Finished difference. Result has 455 places, 664 transitions, 10158 flow [2022-09-20 21:25:25,903 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=10081, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=10158, PETRI_PLACES=455, PETRI_TRANSITIONS=664} [2022-09-20 21:25:25,903 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 314 predicate places. [2022-09-20 21:25:25,903 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 664 transitions, 10158 flow [2022-09-20 21:25:25,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.0) internal successors, (1634), 19 states have internal predecessors, (1634), 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) [2022-09-20 21:25:25,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:25:25,904 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:25:25,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-09-20 21:25:26,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-09-20 21:25:26,104 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:25:26,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:25:26,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1748183291, now seen corresponding path program 1 times [2022-09-20 21:25:26,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:25:26,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034404482] [2022-09-20 21:25:26,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:25:26,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:25:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:25:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:25:26,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:25:26,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034404482] [2022-09-20 21:25:26,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034404482] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:25:26,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774977324] [2022-09-20 21:25:26,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:25:26,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:25:26,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:25:26,152 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:25:26,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-09-20 21:25:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:25:26,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 6 conjunts are in the unsatisfiable core [2022-09-20 21:25:26,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:25:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:25:26,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:25:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:25:26,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774977324] provided 1 perfect and 1 imperfect interpolant sequences [2022-09-20 21:25:26,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-09-20 21:25:26,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-09-20 21:25:26,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962053666] [2022-09-20 21:25:26,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:25:26,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-20 21:25:26,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:25:26,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-20 21:25:26,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-09-20 21:25:26,336 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 154 [2022-09-20 21:25:26,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 664 transitions, 10158 flow. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 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) [2022-09-20 21:25:26,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:25:26,336 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 154 [2022-09-20 21:25:26,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:25:29,039 INFO L130 PetriNetUnfolder]: 3926/12381 cut-off events. [2022-09-20 21:25:29,039 INFO L131 PetriNetUnfolder]: For 206166/208243 co-relation queries the response was YES. [2022-09-20 21:25:29,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67634 conditions, 12381 events. 3926/12381 cut-off events. For 206166/208243 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 145154 event pairs, 1778 based on Foata normal form. 109/11393 useless extension candidates. Maximal degree in co-relation 67520. Up to 2630 conditions per place. [2022-09-20 21:25:29,213 INFO L137 encePairwiseOnDemand]: 149/154 looper letters, 370 selfloop transitions, 5 changer transitions 0/734 dead transitions. [2022-09-20 21:25:29,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 734 transitions, 12438 flow [2022-09-20 21:25:29,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-20 21:25:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-20 21:25:29,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 555 transitions. [2022-09-20 21:25:29,214 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.900974025974026 [2022-09-20 21:25:29,214 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 555 transitions. [2022-09-20 21:25:29,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 555 transitions. [2022-09-20 21:25:29,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:25:29,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 555 transitions. [2022-09-20 21:25:29,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 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) [2022-09-20 21:25:29,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 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) [2022-09-20 21:25:29,215 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 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) [2022-09-20 21:25:29,215 INFO L175 Difference]: Start difference. First operand has 455 places, 664 transitions, 10158 flow. Second operand 4 states and 555 transitions. [2022-09-20 21:25:29,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 734 transitions, 12438 flow [2022-09-20 21:25:29,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 734 transitions, 12140 flow, removed 33 selfloop flow, removed 21 redundant places. [2022-09-20 21:25:29,925 INFO L231 Difference]: Finished difference. Result has 428 places, 656 transitions, 9759 flow [2022-09-20 21:25:29,925 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=9723, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=9759, PETRI_PLACES=428, PETRI_TRANSITIONS=656} [2022-09-20 21:25:29,925 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 287 predicate places. [2022-09-20 21:25:29,925 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 656 transitions, 9759 flow [2022-09-20 21:25:29,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 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) [2022-09-20 21:25:29,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:25:29,926 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:25:29,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-09-20 21:25:30,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:25:30,126 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:25:30,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:25:30,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1659057961, now seen corresponding path program 2 times [2022-09-20 21:25:30,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:25:30,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759745195] [2022-09-20 21:25:30,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:25:30,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:25:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:25:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:25:30,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:25:30,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759745195] [2022-09-20 21:25:30,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759745195] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:25:30,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:25:30,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 21:25:30,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599759146] [2022-09-20 21:25:30,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:25:30,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 21:25:30,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:25:30,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 21:25:30,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-09-20 21:25:30,162 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-09-20 21:25:30,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 656 transitions, 9759 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 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) [2022-09-20 21:25:30,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:25:30,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-09-20 21:25:30,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:25:33,609 INFO L130 PetriNetUnfolder]: 5129/16483 cut-off events. [2022-09-20 21:25:33,609 INFO L131 PetriNetUnfolder]: For 252078/254812 co-relation queries the response was YES. [2022-09-20 21:25:33,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87211 conditions, 16483 events. 5129/16483 cut-off events. For 252078/254812 co-relation queries the response was YES. Maximal size of possible extension queue 893. Compared 203456 event pairs, 2754 based on Foata normal form. 230/16047 useless extension candidates. Maximal degree in co-relation 87103. Up to 3686 conditions per place. [2022-09-20 21:25:33,916 INFO L137 encePairwiseOnDemand]: 147/154 looper letters, 395 selfloop transitions, 7 changer transitions 31/776 dead transitions. [2022-09-20 21:25:33,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 776 transitions, 12903 flow [2022-09-20 21:25:33,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-09-20 21:25:33,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-09-20 21:25:33,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 811 transitions. [2022-09-20 21:25:33,918 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8777056277056277 [2022-09-20 21:25:33,918 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 811 transitions. [2022-09-20 21:25:33,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 811 transitions. [2022-09-20 21:25:33,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:25:33,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 811 transitions. [2022-09-20 21:25:33,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 135.16666666666666) internal successors, (811), 6 states have internal predecessors, (811), 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) [2022-09-20 21:25:33,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 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) [2022-09-20 21:25:33,919 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 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) [2022-09-20 21:25:33,919 INFO L175 Difference]: Start difference. First operand has 428 places, 656 transitions, 9759 flow. Second operand 6 states and 811 transitions. [2022-09-20 21:25:33,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 776 transitions, 12903 flow [2022-09-20 21:25:34,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 776 transitions, 12897 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-09-20 21:25:34,785 INFO L231 Difference]: Finished difference. Result has 435 places, 644 transitions, 9516 flow [2022-09-20 21:25:34,785 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=9622, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9516, PETRI_PLACES=435, PETRI_TRANSITIONS=644} [2022-09-20 21:25:34,786 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 294 predicate places. [2022-09-20 21:25:34,786 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 644 transitions, 9516 flow [2022-09-20 21:25:34,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 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) [2022-09-20 21:25:34,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:25:34,786 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:25:34,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-09-20 21:25:34,786 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:25:34,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:25:34,786 INFO L85 PathProgramCache]: Analyzing trace with hash -428573717, now seen corresponding path program 1 times [2022-09-20 21:25:34,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:25:34,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439670829] [2022-09-20 21:25:34,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:25:34,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:25:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:25:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:25:34,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:25:34,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439670829] [2022-09-20 21:25:34,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439670829] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:25:34,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:25:34,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 21:25:34,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970111849] [2022-09-20 21:25:34,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:25:34,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 21:25:34,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:25:34,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 21:25:34,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-09-20 21:25:34,824 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-09-20 21:25:34,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 644 transitions, 9516 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 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) [2022-09-20 21:25:34,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:25:34,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-09-20 21:25:34,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:25:38,757 INFO L130 PetriNetUnfolder]: 5356/17924 cut-off events. [2022-09-20 21:25:38,757 INFO L131 PetriNetUnfolder]: For 272970/275482 co-relation queries the response was YES. [2022-09-20 21:25:38,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94575 conditions, 17924 events. 5356/17924 cut-off events. For 272970/275482 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 225045 event pairs, 3234 based on Foata normal form. 392/17604 useless extension candidates. Maximal degree in co-relation 94464. Up to 4029 conditions per place. [2022-09-20 21:25:38,991 INFO L137 encePairwiseOnDemand]: 147/154 looper letters, 363 selfloop transitions, 7 changer transitions 56/726 dead transitions. [2022-09-20 21:25:38,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 726 transitions, 11849 flow [2022-09-20 21:25:38,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-09-20 21:25:38,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-09-20 21:25:38,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 812 transitions. [2022-09-20 21:25:38,992 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8787878787878788 [2022-09-20 21:25:38,992 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 812 transitions. [2022-09-20 21:25:38,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 812 transitions. [2022-09-20 21:25:38,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:25:38,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 812 transitions. [2022-09-20 21:25:38,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 135.33333333333334) internal successors, (812), 6 states have internal predecessors, (812), 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) [2022-09-20 21:25:38,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 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) [2022-09-20 21:25:38,994 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 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) [2022-09-20 21:25:38,994 INFO L175 Difference]: Start difference. First operand has 435 places, 644 transitions, 9516 flow. Second operand 6 states and 812 transitions. [2022-09-20 21:25:38,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 726 transitions, 11849 flow [2022-09-20 21:25:40,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 726 transitions, 11720 flow, removed 38 selfloop flow, removed 6 redundant places. [2022-09-20 21:25:40,027 INFO L231 Difference]: Finished difference. Result has 433 places, 590 transitions, 8342 flow [2022-09-20 21:25:40,028 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=8736, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8342, PETRI_PLACES=433, PETRI_TRANSITIONS=590} [2022-09-20 21:25:40,028 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 292 predicate places. [2022-09-20 21:25:40,028 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 590 transitions, 8342 flow [2022-09-20 21:25:40,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 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) [2022-09-20 21:25:40,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:25:40,028 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:25:40,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-09-20 21:25:40,029 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:25:40,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:25:40,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1036336407, now seen corresponding path program 2 times [2022-09-20 21:25:40,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:25:40,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962839883] [2022-09-20 21:25:40,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:25:40,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:25:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:25:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:25:40,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:25:40,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962839883] [2022-09-20 21:25:40,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962839883] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:25:40,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:25:40,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 21:25:40,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287755247] [2022-09-20 21:25:40,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:25:40,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 21:25:40,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:25:40,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 21:25:40,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-09-20 21:25:40,071 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-09-20 21:25:40,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 590 transitions, 8342 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 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) [2022-09-20 21:25:40,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:25:40,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-09-20 21:25:40,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:25:43,877 INFO L130 PetriNetUnfolder]: 5504/18179 cut-off events. [2022-09-20 21:25:43,877 INFO L131 PetriNetUnfolder]: For 270905/274117 co-relation queries the response was YES. [2022-09-20 21:25:44,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97025 conditions, 18179 events. 5504/18179 cut-off events. For 270905/274117 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 227434 event pairs, 3220 based on Foata normal form. 199/17633 useless extension candidates. Maximal degree in co-relation 96915. Up to 3999 conditions per place. [2022-09-20 21:25:44,203 INFO L137 encePairwiseOnDemand]: 146/154 looper letters, 354 selfloop transitions, 12 changer transitions 24/690 dead transitions. [2022-09-20 21:25:44,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 690 transitions, 10849 flow [2022-09-20 21:25:44,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-20 21:25:44,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-20 21:25:44,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 690 transitions. [2022-09-20 21:25:44,204 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8961038961038961 [2022-09-20 21:25:44,204 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 690 transitions. [2022-09-20 21:25:44,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 690 transitions. [2022-09-20 21:25:44,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:25:44,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 690 transitions. [2022-09-20 21:25:44,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.0) internal successors, (690), 5 states have internal predecessors, (690), 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) [2022-09-20 21:25:44,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 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) [2022-09-20 21:25:44,205 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 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) [2022-09-20 21:25:44,205 INFO L175 Difference]: Start difference. First operand has 433 places, 590 transitions, 8342 flow. Second operand 5 states and 690 transitions. [2022-09-20 21:25:44,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 690 transitions, 10849 flow [2022-09-20 21:25:45,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 690 transitions, 10654 flow, removed 47 selfloop flow, removed 7 redundant places. [2022-09-20 21:25:45,134 INFO L231 Difference]: Finished difference. Result has 426 places, 598 transitions, 8283 flow [2022-09-20 21:25:45,134 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=8168, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=8283, PETRI_PLACES=426, PETRI_TRANSITIONS=598} [2022-09-20 21:25:45,135 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 285 predicate places. [2022-09-20 21:25:45,135 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 598 transitions, 8283 flow [2022-09-20 21:25:45,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 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) [2022-09-20 21:25:45,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:25:45,135 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:25:45,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-09-20 21:25:45,135 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:25:45,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:25:45,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1917776335, now seen corresponding path program 3 times [2022-09-20 21:25:45,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:25:45,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85846885] [2022-09-20 21:25:45,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:25:45,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:25:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:25:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:25:45,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:25:45,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85846885] [2022-09-20 21:25:45,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85846885] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:25:45,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585260455] [2022-09-20 21:25:45,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:25:45,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:25:45,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:25:45,185 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:25:45,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-09-20 21:25:45,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-09-20 21:25:45,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:25:45,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 6 conjunts are in the unsatisfiable core [2022-09-20 21:25:45,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:25:45,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:25:45,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:25:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:25:45,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585260455] provided 1 perfect and 1 imperfect interpolant sequences [2022-09-20 21:25:45,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-09-20 21:25:45,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-09-20 21:25:45,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310348427] [2022-09-20 21:25:45,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:25:45,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-20 21:25:45,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:25:45,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-20 21:25:45,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-09-20 21:25:45,647 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 154 [2022-09-20 21:25:45,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 598 transitions, 8283 flow. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 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) [2022-09-20 21:25:45,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:25:45,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 154 [2022-09-20 21:25:45,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:25:48,909 INFO L130 PetriNetUnfolder]: 4189/15436 cut-off events. [2022-09-20 21:25:48,909 INFO L131 PetriNetUnfolder]: For 229793/232624 co-relation queries the response was YES. [2022-09-20 21:25:49,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82533 conditions, 15436 events. 4189/15436 cut-off events. For 229793/232624 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 194811 event pairs, 2470 based on Foata normal form. 480/15332 useless extension candidates. Maximal degree in co-relation 82423. Up to 3072 conditions per place. [2022-09-20 21:25:49,188 INFO L137 encePairwiseOnDemand]: 149/154 looper letters, 308 selfloop transitions, 10 changer transitions 20/645 dead transitions. [2022-09-20 21:25:49,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 645 transitions, 9934 flow [2022-09-20 21:25:49,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-20 21:25:49,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-20 21:25:49,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 555 transitions. [2022-09-20 21:25:49,189 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.900974025974026 [2022-09-20 21:25:49,189 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 555 transitions. [2022-09-20 21:25:49,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 555 transitions. [2022-09-20 21:25:49,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:25:49,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 555 transitions. [2022-09-20 21:25:49,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 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) [2022-09-20 21:25:49,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 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) [2022-09-20 21:25:49,191 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 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) [2022-09-20 21:25:49,191 INFO L175 Difference]: Start difference. First operand has 426 places, 598 transitions, 8283 flow. Second operand 4 states and 555 transitions. [2022-09-20 21:25:49,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 645 transitions, 9934 flow [2022-09-20 21:25:50,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 645 transitions, 9916 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-09-20 21:25:50,041 INFO L231 Difference]: Finished difference. Result has 429 places, 584 transitions, 8008 flow [2022-09-20 21:25:50,042 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=7952, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=8008, PETRI_PLACES=429, PETRI_TRANSITIONS=584} [2022-09-20 21:25:50,042 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 288 predicate places. [2022-09-20 21:25:50,042 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 584 transitions, 8008 flow [2022-09-20 21:25:50,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 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) [2022-09-20 21:25:50,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:25:50,042 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:25:50,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-09-20 21:25:50,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:25:50,250 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:25:50,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:25:50,250 INFO L85 PathProgramCache]: Analyzing trace with hash 929036907, now seen corresponding path program 3 times [2022-09-20 21:25:50,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:25:50,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244501821] [2022-09-20 21:25:50,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:25:50,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:25:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:25:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:25:50,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:25:50,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244501821] [2022-09-20 21:25:50,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244501821] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:25:50,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:25:50,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-20 21:25:50,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330382144] [2022-09-20 21:25:50,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:25:50,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 21:25:50,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:25:50,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 21:25:50,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-09-20 21:25:50,307 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-09-20 21:25:50,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 584 transitions, 8008 flow. Second operand has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 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) [2022-09-20 21:25:50,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:25:50,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-09-20 21:25:50,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:25:53,646 INFO L130 PetriNetUnfolder]: 4878/15541 cut-off events. [2022-09-20 21:25:53,646 INFO L131 PetriNetUnfolder]: For 238989/241905 co-relation queries the response was YES. [2022-09-20 21:25:53,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85806 conditions, 15541 events. 4878/15541 cut-off events. For 238989/241905 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 187444 event pairs, 2595 based on Foata normal form. 167/15088 useless extension candidates. Maximal degree in co-relation 85694. Up to 3531 conditions per place. [2022-09-20 21:25:53,852 INFO L137 encePairwiseOnDemand]: 146/154 looper letters, 289 selfloop transitions, 20 changer transitions 51/615 dead transitions. [2022-09-20 21:25:53,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 615 transitions, 9268 flow [2022-09-20 21:25:53,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-09-20 21:25:53,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-09-20 21:25:53,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 824 transitions. [2022-09-20 21:25:53,853 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8917748917748918 [2022-09-20 21:25:53,853 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 824 transitions. [2022-09-20 21:25:53,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 824 transitions. [2022-09-20 21:25:53,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:25:53,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 824 transitions. [2022-09-20 21:25:53,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 137.33333333333334) internal successors, (824), 6 states have internal predecessors, (824), 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) [2022-09-20 21:25:53,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 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) [2022-09-20 21:25:53,854 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 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) [2022-09-20 21:25:53,854 INFO L175 Difference]: Start difference. First operand has 429 places, 584 transitions, 8008 flow. Second operand 6 states and 824 transitions. [2022-09-20 21:25:53,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 615 transitions, 9268 flow [2022-09-20 21:25:54,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 615 transitions, 8850 flow, removed 25 selfloop flow, removed 16 redundant places. [2022-09-20 21:25:54,743 INFO L231 Difference]: Finished difference. Result has 413 places, 481 transitions, 5805 flow [2022-09-20 21:25:54,743 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6179, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5805, PETRI_PLACES=413, PETRI_TRANSITIONS=481} [2022-09-20 21:25:54,744 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 272 predicate places. [2022-09-20 21:25:54,744 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 481 transitions, 5805 flow [2022-09-20 21:25:54,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 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) [2022-09-20 21:25:54,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:25:54,744 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:25:54,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-09-20 21:25:54,744 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:25:54,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:25:54,745 INFO L85 PathProgramCache]: Analyzing trace with hash -657327825, now seen corresponding path program 4 times [2022-09-20 21:25:54,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:25:54,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805566108] [2022-09-20 21:25:54,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:25:54,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:25:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:25:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:25:54,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:25:54,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805566108] [2022-09-20 21:25:54,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805566108] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:25:54,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574024863] [2022-09-20 21:25:54,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:25:54,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:25:54,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:25:54,796 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:25:54,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-09-20 21:25:54,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:25:54,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:25:54,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-20 21:25:54,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:25:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:25:54,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:25:54,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:25:54,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574024863] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:25:54,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:25:54,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-09-20 21:25:54,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120003336] [2022-09-20 21:25:54,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:25:54,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-09-20 21:25:54,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:25:54,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-09-20 21:25:54,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-09-20 21:25:54,963 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-09-20 21:25:54,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 481 transitions, 5805 flow. Second operand has 9 states, 9 states have (on average 129.0) internal successors, (1161), 9 states have internal predecessors, (1161), 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) [2022-09-20 21:25:54,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:25:54,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-09-20 21:25:54,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:25:57,502 INFO L130 PetriNetUnfolder]: 4348/12800 cut-off events. [2022-09-20 21:25:57,502 INFO L131 PetriNetUnfolder]: For 183292/185167 co-relation queries the response was YES. [2022-09-20 21:25:57,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69314 conditions, 12800 events. 4348/12800 cut-off events. For 183292/185167 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 144955 event pairs, 2316 based on Foata normal form. 154/12432 useless extension candidates. Maximal degree in co-relation 69203. Up to 2987 conditions per place. [2022-09-20 21:25:57,796 INFO L137 encePairwiseOnDemand]: 146/154 looper letters, 248 selfloop transitions, 25 changer transitions 6/524 dead transitions. [2022-09-20 21:25:57,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 524 transitions, 6980 flow [2022-09-20 21:25:57,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-09-20 21:25:57,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-09-20 21:25:57,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1089 transitions. [2022-09-20 21:25:57,798 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8839285714285714 [2022-09-20 21:25:57,798 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1089 transitions. [2022-09-20 21:25:57,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1089 transitions. [2022-09-20 21:25:57,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:25:57,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1089 transitions. [2022-09-20 21:25:57,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 136.125) internal successors, (1089), 8 states have internal predecessors, (1089), 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) [2022-09-20 21:25:57,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 154.0) internal successors, (1386), 9 states have internal predecessors, (1386), 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) [2022-09-20 21:25:57,800 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 154.0) internal successors, (1386), 9 states have internal predecessors, (1386), 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) [2022-09-20 21:25:57,800 INFO L175 Difference]: Start difference. First operand has 413 places, 481 transitions, 5805 flow. Second operand 8 states and 1089 transitions. [2022-09-20 21:25:57,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 524 transitions, 6980 flow [2022-09-20 21:25:58,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 524 transitions, 6575 flow, removed 107 selfloop flow, removed 20 redundant places. [2022-09-20 21:25:58,226 INFO L231 Difference]: Finished difference. Result has 389 places, 426 transitions, 4658 flow [2022-09-20 21:25:58,226 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4601, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4658, PETRI_PLACES=389, PETRI_TRANSITIONS=426} [2022-09-20 21:25:58,227 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 248 predicate places. [2022-09-20 21:25:58,227 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 426 transitions, 4658 flow [2022-09-20 21:25:58,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 129.0) internal successors, (1161), 9 states have internal predecessors, (1161), 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) [2022-09-20 21:25:58,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:25:58,227 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:25:58,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-09-20 21:25:58,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:25:58,433 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:25:58,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:25:58,434 INFO L85 PathProgramCache]: Analyzing trace with hash -255877260, now seen corresponding path program 22 times [2022-09-20 21:25:58,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:25:58,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134743937] [2022-09-20 21:25:58,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:25:58,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:25:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:26:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:26:01,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:26:01,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134743937] [2022-09-20 21:26:01,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134743937] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:26:01,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910040464] [2022-09-20 21:26:01,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:26:01,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:26:01,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:26:01,144 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:26:01,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-09-20 21:26:01,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:26:01,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:26:01,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 62 conjunts are in the unsatisfiable core [2022-09-20 21:26:01,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:26:02,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:26:02,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 34 [2022-09-20 21:26:02,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:26:02,733 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:26:02,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 17 [2022-09-20 21:26:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:26:02,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:26:03,547 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-09-20 21:26:03,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 238 treesize of output 205 [2022-09-20 21:26:03,556 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:26:03,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 110 [2022-09-20 21:26:03,562 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:26:03,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 84 [2022-09-20 21:26:11,962 WARN L233 SmtUtils]: Spent 8.13s on a formula simplification. DAG size of input: 60 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-09-20 21:26:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:26:13,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910040464] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:26:13,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:26:13,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 30, 30] total 88 [2022-09-20 21:26:13,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44425740] [2022-09-20 21:26:13,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:26:13,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-09-20 21:26:13,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:26:13,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-09-20 21:26:13,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=7272, Unknown=1, NotChecked=0, Total=7656 [2022-09-20 21:26:13,493 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-09-20 21:26:13,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 426 transitions, 4658 flow. Second operand has 88 states, 88 states have (on average 66.56818181818181) internal successors, (5858), 88 states have internal predecessors, (5858), 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) [2022-09-20 21:26:13,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:26:13,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-09-20 21:26:13,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:26:22,334 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_#StackHeapBarrier| 1))) (and (<= .cse0 |c_ULTIMATE.start_main_~#t1~0#1.base|) (or (not (= (mod (select (select |c_#memory_int| c_~queue~0.base) (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296) (mod |c_thread2Thread1of1ForFork0_~x~1#1| 4294967296))) (not (< (+ c_~start~0 1) c_~n~0)) (and (forall ((v_ArrVal_1021 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1021) c_~queue~0.base)) (.cse4 (* c_~start~0 4))) (let ((.cse1 (select .cse3 (+ .cse4 c_~queue~0.offset 4))) (.cse2 (select .cse3 (+ .cse4 c_~queue~0.offset)))) (<= (+ .cse1 (* (div .cse2 4294967296) 4294967296)) (+ (* (div .cse1 4294967296) 4294967296) .cse2))))) (forall ((v_ArrVal_1021 (Array Int Int))) (not (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1021) c_~queue~0.base)) (.cse8 (* c_~start~0 4))) (let ((.cse5 (select .cse7 (+ .cse8 c_~queue~0.offset 4))) (.cse6 (select .cse7 (+ .cse8 c_~queue~0.offset)))) (<= (+ .cse5 (* (div .cse6 4294967296) 4294967296) 1) (+ (* (div .cse5 4294967296) 4294967296) .cse6))))))) (not (<= 0 c_~start~0))) (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#t3~0#1.base|) (= (select |c_#valid| |c_ULTIMATE.start_main_~#t3~0#1.base|) 1) (<= .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base|))) is different from false [2022-09-20 21:26:28,840 WARN L233 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 79 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-09-20 21:26:35,027 INFO L130 PetriNetUnfolder]: 5639/14884 cut-off events. [2022-09-20 21:26:35,028 INFO L131 PetriNetUnfolder]: For 207665/208733 co-relation queries the response was YES. [2022-09-20 21:26:35,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86983 conditions, 14884 events. 5639/14884 cut-off events. For 207665/208733 co-relation queries the response was YES. Maximal size of possible extension queue 791. Compared 162742 event pairs, 2293 based on Foata normal form. 140/14479 useless extension candidates. Maximal degree in co-relation 86881. Up to 7800 conditions per place. [2022-09-20 21:26:35,228 INFO L137 encePairwiseOnDemand]: 114/154 looper letters, 344 selfloop transitions, 109 changer transitions 100/643 dead transitions. [2022-09-20 21:26:35,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 643 transitions, 8522 flow [2022-09-20 21:26:35,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-09-20 21:26:35,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-09-20 21:26:35,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4649 transitions. [2022-09-20 21:26:35,230 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4439457601222307 [2022-09-20 21:26:35,230 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4649 transitions. [2022-09-20 21:26:35,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4649 transitions. [2022-09-20 21:26:35,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:26:35,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4649 transitions. [2022-09-20 21:26:35,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 68.36764705882354) internal successors, (4649), 68 states have internal predecessors, (4649), 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) [2022-09-20 21:26:35,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 154.0) internal successors, (10626), 69 states have internal predecessors, (10626), 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) [2022-09-20 21:26:35,239 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 154.0) internal successors, (10626), 69 states have internal predecessors, (10626), 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) [2022-09-20 21:26:35,239 INFO L175 Difference]: Start difference. First operand has 389 places, 426 transitions, 4658 flow. Second operand 68 states and 4649 transitions. [2022-09-20 21:26:35,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 643 transitions, 8522 flow [2022-09-20 21:26:35,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 643 transitions, 8376 flow, removed 63 selfloop flow, removed 2 redundant places. [2022-09-20 21:26:35,690 INFO L231 Difference]: Finished difference. Result has 475 places, 478 transitions, 5719 flow [2022-09-20 21:26:35,690 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4564, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=5719, PETRI_PLACES=475, PETRI_TRANSITIONS=478} [2022-09-20 21:26:35,691 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 334 predicate places. [2022-09-20 21:26:35,691 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 478 transitions, 5719 flow [2022-09-20 21:26:35,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 66.56818181818181) internal successors, (5858), 88 states have internal predecessors, (5858), 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) [2022-09-20 21:26:35,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:26:35,692 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:26:35,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-09-20 21:26:35,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-09-20 21:26:35,898 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:26:35,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:26:35,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1416167584, now seen corresponding path program 23 times [2022-09-20 21:26:35,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:26:35,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117582985] [2022-09-20 21:26:35,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:26:35,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:26:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:26:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:26:40,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:26:40,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117582985] [2022-09-20 21:26:40,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117582985] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:26:40,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138638530] [2022-09-20 21:26:40,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 21:26:40,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:26:40,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:26:40,550 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:26:40,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-09-20 21:26:40,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-09-20 21:26:40,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:26:40,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 48 conjunts are in the unsatisfiable core [2022-09-20 21:26:40,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:26:41,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:26:41,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 22 [2022-09-20 21:26:41,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:26:41,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 22 [2022-09-20 21:26:41,805 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:26:41,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-09-20 21:26:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-09-20 21:26:41,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:26:42,303 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1063 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1063) c_~queue~0.base))) (or (not (= (mod |c_thread2Thread1of1ForFork0_~x~1#1| 4294967296) (mod (select .cse0 (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296))) (let ((.cse3 (* c_~start~0 4))) (let ((.cse2 (select .cse0 (+ .cse3 c_~queue~0.offset))) (.cse1 (select .cse0 (+ .cse3 c_~queue~0.offset 4)))) (<= (+ .cse1 (* (div .cse2 4294967296) 4294967296)) (+ .cse2 (* (div .cse1 4294967296) 4294967296)))))))) (forall ((v_ArrVal_1063 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1063) c_~queue~0.base))) (or (not (let ((.cse7 (* c_~start~0 4))) (let ((.cse5 (select .cse6 (+ .cse7 c_~queue~0.offset))) (.cse4 (select .cse6 (+ .cse7 c_~queue~0.offset 4)))) (<= (+ .cse4 (* (div .cse5 4294967296) 4294967296) 1) (+ .cse5 (* (div .cse4 4294967296) 4294967296)))))) (not (= (mod |c_thread2Thread1of1ForFork0_~x~1#1| 4294967296) (mod (select .cse6 (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296))))))) is different from false [2022-09-20 21:26:42,360 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1063 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1063) c_~queue~0.base))) (or (not (= (mod (select .cse0 (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296) 0)) (let ((.cse3 (* c_~start~0 4))) (let ((.cse2 (select .cse0 (+ .cse3 c_~queue~0.offset))) (.cse1 (select .cse0 (+ .cse3 c_~queue~0.offset 4)))) (<= (+ .cse1 (* (div .cse2 4294967296) 4294967296)) (+ .cse2 (* (div .cse1 4294967296) 4294967296)))))))) (forall ((v_ArrVal_1063 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1063) c_~queue~0.base))) (or (not (let ((.cse7 (* c_~start~0 4))) (let ((.cse5 (select .cse6 (+ .cse7 c_~queue~0.offset))) (.cse4 (select .cse6 (+ .cse7 c_~queue~0.offset 4)))) (<= (+ .cse4 (* (div .cse5 4294967296) 4294967296) 1) (+ .cse5 (* (div .cse4 4294967296) 4294967296)))))) (not (= (mod (select .cse6 (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296) 0)))))) is different from false [2022-09-20 21:26:42,383 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1063 (Array Int Int)) (v_ArrVal_1062 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1062) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1063) c_~queue~0.base))) (or (not (= (mod (select .cse0 (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296) 0)) (let ((.cse3 (* c_~start~0 4))) (let ((.cse2 (select .cse0 (+ .cse3 c_~queue~0.offset))) (.cse1 (select .cse0 (+ .cse3 c_~queue~0.offset 4)))) (<= (+ .cse1 (* 4294967296 (div .cse2 4294967296))) (+ .cse2 (* (div .cse1 4294967296) 4294967296)))))))) (forall ((v_ArrVal_1063 (Array Int Int)) (v_ArrVal_1062 (Array Int Int))) (let ((.cse4 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1062) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1063) c_~queue~0.base))) (or (not (= (mod (select .cse4 (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296) 0)) (not (let ((.cse7 (* c_~start~0 4))) (let ((.cse6 (select .cse4 (+ .cse7 c_~queue~0.offset))) (.cse5 (select .cse4 (+ .cse7 c_~queue~0.offset 4)))) (<= (+ .cse5 (* 4294967296 (div .cse6 4294967296)) 1) (+ .cse6 (* (div .cse5 4294967296) 4294967296)))))))))) is different from false [2022-09-20 21:26:42,498 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-09-20 21:26:42,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1219 treesize of output 1091 [2022-09-20 21:26:42,534 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-09-20 21:26:42,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1030 treesize of output 991 [2022-09-20 21:26:42,572 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-09-20 21:26:42,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 964 treesize of output 859 [2022-09-20 21:26:42,609 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-09-20 21:26:42,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 832 treesize of output 727 [2022-09-20 21:26:42,648 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-09-20 21:26:42,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 700 treesize of output 661 [2022-09-20 21:26:43,695 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2022-09-20 21:26:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 21:26:44,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138638530] provided 1 perfect and 1 imperfect interpolant sequences [2022-09-20 21:26:44,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-09-20 21:26:44,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [42, 23] total 77 [2022-09-20 21:26:44,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757600745] [2022-09-20 21:26:44,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:26:44,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-09-20 21:26:44,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:26:44,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-09-20 21:26:44,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=5151, Unknown=3, NotChecked=438, Total=5852 [2022-09-20 21:26:44,563 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 154 [2022-09-20 21:26:44,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 478 transitions, 5719 flow. Second operand has 21 states, 21 states have (on average 83.71428571428571) internal successors, (1758), 21 states have internal predecessors, (1758), 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) [2022-09-20 21:26:44,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:26:44,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 154 [2022-09-20 21:26:44,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:26:49,053 INFO L130 PetriNetUnfolder]: 5802/14458 cut-off events. [2022-09-20 21:26:49,053 INFO L131 PetriNetUnfolder]: For 242755/244135 co-relation queries the response was YES. [2022-09-20 21:26:49,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93030 conditions, 14458 events. 5802/14458 cut-off events. For 242755/244135 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 152332 event pairs, 2677 based on Foata normal form. 138/14002 useless extension candidates. Maximal degree in co-relation 92902. Up to 8033 conditions per place. [2022-09-20 21:26:49,268 INFO L137 encePairwiseOnDemand]: 130/154 looper letters, 352 selfloop transitions, 75 changer transitions 41/592 dead transitions. [2022-09-20 21:26:49,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 592 transitions, 8115 flow [2022-09-20 21:26:49,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-09-20 21:26:49,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-09-20 21:26:49,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2182 transitions. [2022-09-20 21:26:49,270 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5667532467532468 [2022-09-20 21:26:49,270 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2182 transitions. [2022-09-20 21:26:49,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2182 transitions. [2022-09-20 21:26:49,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:26:49,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2182 transitions. [2022-09-20 21:26:49,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 87.28) internal successors, (2182), 25 states have internal predecessors, (2182), 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) [2022-09-20 21:26:49,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 154.0) internal successors, (4004), 26 states have internal predecessors, (4004), 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) [2022-09-20 21:26:49,274 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 154.0) internal successors, (4004), 26 states have internal predecessors, (4004), 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) [2022-09-20 21:26:49,274 INFO L175 Difference]: Start difference. First operand has 475 places, 478 transitions, 5719 flow. Second operand 25 states and 2182 transitions. [2022-09-20 21:26:49,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 592 transitions, 8115 flow [2022-09-20 21:26:49,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 592 transitions, 7710 flow, removed 159 selfloop flow, removed 46 redundant places. [2022-09-20 21:26:49,947 INFO L231 Difference]: Finished difference. Result has 442 places, 494 transitions, 5911 flow [2022-09-20 21:26:49,947 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=5445, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5911, PETRI_PLACES=442, PETRI_TRANSITIONS=494} [2022-09-20 21:26:49,948 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 301 predicate places. [2022-09-20 21:26:49,948 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 494 transitions, 5911 flow [2022-09-20 21:26:49,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 83.71428571428571) internal successors, (1758), 21 states have internal predecessors, (1758), 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) [2022-09-20 21:26:49,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:26:49,948 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2022-09-20 21:26:49,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-09-20 21:26:50,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-09-20 21:26:50,149 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:26:50,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:26:50,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1194847778, now seen corresponding path program 24 times [2022-09-20 21:26:50,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:26:50,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106692386] [2022-09-20 21:26:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:26:50,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:26:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:26:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:26:51,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:26:51,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106692386] [2022-09-20 21:26:51,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106692386] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:26:51,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046154388] [2022-09-20 21:26:51,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 21:26:51,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:26:51,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:26:51,657 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:26:51,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-09-20 21:26:51,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-09-20 21:26:51,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:26:51,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 46 conjunts are in the unsatisfiable core [2022-09-20 21:26:51,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:26:52,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:26:52,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 23 [2022-09-20 21:26:52,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:26:52,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 34 [2022-09-20 21:26:52,617 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:26:52,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 17 [2022-09-20 21:26:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-09-20 21:26:52,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 21:26:52,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046154388] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:26:52,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 21:26:52,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [35] total 52 [2022-09-20 21:26:52,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618174362] [2022-09-20 21:26:52,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:26:52,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-09-20 21:26:52,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:26:52,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-09-20 21:26:52,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2507, Unknown=0, NotChecked=0, Total=2652 [2022-09-20 21:26:52,701 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 154 [2022-09-20 21:26:52,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 494 transitions, 5911 flow. Second operand has 21 states, 21 states have (on average 83.71428571428571) internal successors, (1758), 21 states have internal predecessors, (1758), 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) [2022-09-20 21:26:52,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:26:52,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 154 [2022-09-20 21:26:52,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:26:56,809 INFO L130 PetriNetUnfolder]: 5321/13612 cut-off events. [2022-09-20 21:26:56,809 INFO L131 PetriNetUnfolder]: For 223568/224845 co-relation queries the response was YES. [2022-09-20 21:26:56,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86632 conditions, 13612 events. 5321/13612 cut-off events. For 223568/224845 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 144280 event pairs, 2194 based on Foata normal form. 215/13291 useless extension candidates. Maximal degree in co-relation 86509. Up to 7328 conditions per place. [2022-09-20 21:26:57,014 INFO L137 encePairwiseOnDemand]: 131/154 looper letters, 287 selfloop transitions, 80 changer transitions 56/547 dead transitions. [2022-09-20 21:26:57,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 547 transitions, 7489 flow [2022-09-20 21:26:57,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-09-20 21:26:57,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-09-20 21:26:57,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1916 transitions. [2022-09-20 21:26:57,016 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5655253837072018 [2022-09-20 21:26:57,016 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1916 transitions. [2022-09-20 21:26:57,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1916 transitions. [2022-09-20 21:26:57,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:26:57,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1916 transitions. [2022-09-20 21:26:57,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 87.0909090909091) internal successors, (1916), 22 states have internal predecessors, (1916), 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) [2022-09-20 21:26:57,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 154.0) internal successors, (3542), 23 states have internal predecessors, (3542), 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) [2022-09-20 21:26:57,019 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 154.0) internal successors, (3542), 23 states have internal predecessors, (3542), 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) [2022-09-20 21:26:57,019 INFO L175 Difference]: Start difference. First operand has 442 places, 494 transitions, 5911 flow. Second operand 22 states and 1916 transitions. [2022-09-20 21:26:57,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 547 transitions, 7489 flow [2022-09-20 21:26:57,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 547 transitions, 7296 flow, removed 60 selfloop flow, removed 20 redundant places. [2022-09-20 21:26:57,598 INFO L231 Difference]: Finished difference. Result has 441 places, 481 transitions, 5770 flow [2022-09-20 21:26:57,598 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=5688, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5770, PETRI_PLACES=441, PETRI_TRANSITIONS=481} [2022-09-20 21:26:57,598 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 300 predicate places. [2022-09-20 21:26:57,599 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 481 transitions, 5770 flow [2022-09-20 21:26:57,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 83.71428571428571) internal successors, (1758), 21 states have internal predecessors, (1758), 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) [2022-09-20 21:26:57,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:26:57,599 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:26:57,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-09-20 21:26:57,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:26:57,800 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:26:57,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:26:57,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1394423926, now seen corresponding path program 1 times [2022-09-20 21:26:57,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:26:57,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186510619] [2022-09-20 21:26:57,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:26:57,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:26:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:26:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-09-20 21:26:57,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:26:57,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186510619] [2022-09-20 21:26:57,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186510619] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:26:57,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:26:57,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-09-20 21:26:57,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836607162] [2022-09-20 21:26:57,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:26:57,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-20 21:26:57,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:26:57,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-20 21:26:57,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-09-20 21:26:57,829 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 154 [2022-09-20 21:26:57,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 481 transitions, 5770 flow. Second operand has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 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) [2022-09-20 21:26:57,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:26:57,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 154 [2022-09-20 21:26:57,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:26:58,624 INFO L130 PetriNetUnfolder]: 1011/4270 cut-off events. [2022-09-20 21:26:58,624 INFO L131 PetriNetUnfolder]: For 68050/68543 co-relation queries the response was YES. [2022-09-20 21:26:58,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23670 conditions, 4270 events. 1011/4270 cut-off events. For 68050/68543 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 41626 event pairs, 193 based on Foata normal form. 287/4374 useless extension candidates. Maximal degree in co-relation 23549. Up to 412 conditions per place. [2022-09-20 21:26:58,683 INFO L137 encePairwiseOnDemand]: 150/154 looper letters, 48 selfloop transitions, 64 changer transitions 0/419 dead transitions. [2022-09-20 21:26:58,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 419 transitions, 4959 flow [2022-09-20 21:26:58,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-20 21:26:58,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-20 21:26:58,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 550 transitions. [2022-09-20 21:26:58,684 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8928571428571429 [2022-09-20 21:26:58,684 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 550 transitions. [2022-09-20 21:26:58,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 550 transitions. [2022-09-20 21:26:58,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:26:58,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 550 transitions. [2022-09-20 21:26:58,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 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) [2022-09-20 21:26:58,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 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) [2022-09-20 21:26:58,685 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 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) [2022-09-20 21:26:58,685 INFO L175 Difference]: Start difference. First operand has 441 places, 481 transitions, 5770 flow. Second operand 4 states and 550 transitions. [2022-09-20 21:26:58,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 419 transitions, 4959 flow [2022-09-20 21:26:58,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 419 transitions, 4638 flow, removed 75 selfloop flow, removed 30 redundant places. [2022-09-20 21:26:58,839 INFO L231 Difference]: Finished difference. Result has 387 places, 414 transitions, 4564 flow [2022-09-20 21:26:58,840 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4365, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4564, PETRI_PLACES=387, PETRI_TRANSITIONS=414} [2022-09-20 21:26:58,840 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 246 predicate places. [2022-09-20 21:26:58,840 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 414 transitions, 4564 flow [2022-09-20 21:26:58,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 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) [2022-09-20 21:26:58,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:26:58,840 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:26:58,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-09-20 21:26:58,841 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:26:58,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:26:58,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1274820838, now seen corresponding path program 2 times [2022-09-20 21:26:58,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:26:58,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562803905] [2022-09-20 21:26:58,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:26:58,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:26:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:26:59,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:26:59,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:26:59,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562803905] [2022-09-20 21:26:59,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562803905] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:26:59,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801806038] [2022-09-20 21:26:59,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:26:59,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:26:59,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:26:59,469 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:26:59,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-09-20 21:26:59,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:26:59,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:26:59,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 54 conjunts are in the unsatisfiable core [2022-09-20 21:26:59,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:27:00,495 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:27:00,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 20 [2022-09-20 21:27:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:27:00,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:27:01,010 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-09-20 21:27:01,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 134 treesize of output 101 [2022-09-20 21:27:09,381 WARN L233 SmtUtils]: Spent 8.13s on a formula simplification. DAG size of input: 67 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-09-20 21:27:17,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:27:17,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801806038] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:27:17,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:27:17,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 23] total 68 [2022-09-20 21:27:17,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654480709] [2022-09-20 21:27:17,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:27:17,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-09-20 21:27:17,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:27:17,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-09-20 21:27:17,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=608, Invalid=3948, Unknown=0, NotChecked=0, Total=4556 [2022-09-20 21:27:17,692 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 154 [2022-09-20 21:27:17,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 414 transitions, 4564 flow. Second operand has 68 states, 68 states have (on average 79.67647058823529) internal successors, (5418), 68 states have internal predecessors, (5418), 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) [2022-09-20 21:27:17,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:27:17,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 154 [2022-09-20 21:27:17,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:27:26,240 WARN L233 SmtUtils]: Spent 7.35s on a formula simplification. DAG size of input: 51 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-09-20 21:27:49,602 WARN L233 SmtUtils]: Spent 13.22s on a formula simplification. DAG size of input: 65 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-09-20 21:28:00,828 WARN L233 SmtUtils]: Spent 8.51s on a formula simplification. DAG size of input: 93 DAG size of output: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-09-20 21:28:38,425 WARN L233 SmtUtils]: Spent 32.64s on a formula simplification. DAG size of input: 107 DAG size of output: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-09-20 21:28:54,486 WARN L233 SmtUtils]: Spent 12.01s on a formula simplification. DAG size of input: 98 DAG size of output: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-09-20 21:28:56,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-09-20 21:29:05,548 WARN L233 SmtUtils]: Spent 6.77s on a formula simplification. DAG size of input: 71 DAG size of output: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-09-20 21:29:07,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-09-20 21:29:14,896 INFO L130 PetriNetUnfolder]: 3872/12071 cut-off events. [2022-09-20 21:29:14,896 INFO L131 PetriNetUnfolder]: For 142886/143590 co-relation queries the response was YES. [2022-09-20 21:29:15,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66180 conditions, 12071 events. 3872/12071 cut-off events. For 142886/143590 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 131425 event pairs, 653 based on Foata normal form. 346/12113 useless extension candidates. Maximal degree in co-relation 66074. Up to 1263 conditions per place. [2022-09-20 21:29:15,047 INFO L137 encePairwiseOnDemand]: 116/154 looper letters, 595 selfloop transitions, 318 changer transitions 136/1150 dead transitions. [2022-09-20 21:29:15,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 1150 transitions, 15876 flow [2022-09-20 21:29:15,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-09-20 21:29:15,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-09-20 21:29:15,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 7397 transitions. [2022-09-20 21:29:15,051 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5458234946871311 [2022-09-20 21:29:15,051 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 7397 transitions. [2022-09-20 21:29:15,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 7397 transitions. [2022-09-20 21:29:15,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:29:15,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 7397 transitions. [2022-09-20 21:29:15,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 84.05681818181819) internal successors, (7397), 88 states have internal predecessors, (7397), 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) [2022-09-20 21:29:15,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 154.0) internal successors, (13706), 89 states have internal predecessors, (13706), 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) [2022-09-20 21:29:15,063 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 154.0) internal successors, (13706), 89 states have internal predecessors, (13706), 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) [2022-09-20 21:29:15,063 INFO L175 Difference]: Start difference. First operand has 387 places, 414 transitions, 4564 flow. Second operand 88 states and 7397 transitions. [2022-09-20 21:29:15,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 1150 transitions, 15876 flow [2022-09-20 21:29:15,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 1150 transitions, 15506 flow, removed 18 selfloop flow, removed 7 redundant places. [2022-09-20 21:29:15,445 INFO L231 Difference]: Finished difference. Result has 512 places, 636 transitions, 9476 flow [2022-09-20 21:29:15,445 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4442, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=9476, PETRI_PLACES=512, PETRI_TRANSITIONS=636} [2022-09-20 21:29:15,445 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 371 predicate places. [2022-09-20 21:29:15,446 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 636 transitions, 9476 flow [2022-09-20 21:29:15,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 79.67647058823529) internal successors, (5418), 68 states have internal predecessors, (5418), 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) [2022-09-20 21:29:15,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:29:15,446 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:29:15,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-09-20 21:29:15,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:29:15,647 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:29:15,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:29:15,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1693756494, now seen corresponding path program 3 times [2022-09-20 21:29:15,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:29:15,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659559071] [2022-09-20 21:29:15,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:29:15,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:29:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:29:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:29:16,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:29:16,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659559071] [2022-09-20 21:29:16,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659559071] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:29:16,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434887491] [2022-09-20 21:29:16,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:29:16,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:29:16,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:29:16,485 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:29:16,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-09-20 21:29:16,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-09-20 21:29:16,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:29:16,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 40 conjunts are in the unsatisfiable core [2022-09-20 21:29:16,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:29:17,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:29:17,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 25 [2022-09-20 21:29:17,406 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:29:17,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 14 [2022-09-20 21:29:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:29:17,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:29:17,845 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1196 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1196) c_~queue~0.base))) (or (let ((.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296))) (not (= (mod |c_thread2Thread1of1ForFork0_~x~1#1| 4294967296) (mod (select .cse0 (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296)))))) is different from false [2022-09-20 21:29:17,922 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-09-20 21:29:17,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 130 [2022-09-20 21:29:17,953 INFO L356 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-09-20 21:29:17,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 64 [2022-09-20 21:29:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:29:18,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434887491] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:29:18,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:29:18,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 21, 21] total 61 [2022-09-20 21:29:18,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105987195] [2022-09-20 21:29:18,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:29:18,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-09-20 21:29:18,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:29:18,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-09-20 21:29:18,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3365, Unknown=1, NotChecked=116, Total=3660 [2022-09-20 21:29:18,847 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 154 [2022-09-20 21:29:18,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 636 transitions, 9476 flow. Second operand has 61 states, 61 states have (on average 69.04918032786885) internal successors, (4212), 61 states have internal predecessors, (4212), 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) [2022-09-20 21:29:18,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:29:18,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 154 [2022-09-20 21:29:18,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:29:32,525 INFO L130 PetriNetUnfolder]: 4752/14071 cut-off events. [2022-09-20 21:29:32,525 INFO L131 PetriNetUnfolder]: For 226396/227747 co-relation queries the response was YES. [2022-09-20 21:29:32,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89548 conditions, 14071 events. 4752/14071 cut-off events. For 226396/227747 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 154042 event pairs, 802 based on Foata normal form. 648/14248 useless extension candidates. Maximal degree in co-relation 89402. Up to 1466 conditions per place. [2022-09-20 21:29:32,766 INFO L137 encePairwiseOnDemand]: 123/154 looper letters, 471 selfloop transitions, 337 changer transitions 153/1055 dead transitions. [2022-09-20 21:29:32,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 1055 transitions, 17522 flow [2022-09-20 21:29:32,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-09-20 21:29:32,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2022-09-20 21:29:32,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 5489 transitions. [2022-09-20 21:29:32,769 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.46898496240601506 [2022-09-20 21:29:32,769 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 5489 transitions. [2022-09-20 21:29:32,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 5489 transitions. [2022-09-20 21:29:32,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:29:32,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 5489 transitions. [2022-09-20 21:29:32,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 72.22368421052632) internal successors, (5489), 76 states have internal predecessors, (5489), 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) [2022-09-20 21:29:32,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 154.0) internal successors, (11858), 77 states have internal predecessors, (11858), 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) [2022-09-20 21:29:32,781 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 154.0) internal successors, (11858), 77 states have internal predecessors, (11858), 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) [2022-09-20 21:29:32,781 INFO L175 Difference]: Start difference. First operand has 512 places, 636 transitions, 9476 flow. Second operand 76 states and 5489 transitions. [2022-09-20 21:29:32,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 1055 transitions, 17522 flow [2022-09-20 21:29:33,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 1055 transitions, 16523 flow, removed 413 selfloop flow, removed 48 redundant places. [2022-09-20 21:29:33,811 INFO L231 Difference]: Finished difference. Result has 549 places, 692 transitions, 10953 flow [2022-09-20 21:29:33,811 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=8763, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=10953, PETRI_PLACES=549, PETRI_TRANSITIONS=692} [2022-09-20 21:29:33,811 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 408 predicate places. [2022-09-20 21:29:33,812 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 692 transitions, 10953 flow [2022-09-20 21:29:33,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 69.04918032786885) internal successors, (4212), 61 states have internal predecessors, (4212), 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) [2022-09-20 21:29:33,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:29:33,812 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:29:33,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-09-20 21:29:34,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:29:34,013 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:29:34,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:29:34,013 INFO L85 PathProgramCache]: Analyzing trace with hash -924430848, now seen corresponding path program 4 times [2022-09-20 21:29:34,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:29:34,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517737363] [2022-09-20 21:29:34,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:29:34,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:29:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:29:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:29:34,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:29:34,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517737363] [2022-09-20 21:29:34,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517737363] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:29:34,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961506931] [2022-09-20 21:29:34,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:29:34,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:29:34,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:29:34,826 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:29:34,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-09-20 21:29:34,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:29:34,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:29:34,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 57 conjunts are in the unsatisfiable core [2022-09-20 21:29:34,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:29:35,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:29:35,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 31 [2022-09-20 21:29:36,096 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:29:36,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 14 [2022-09-20 21:29:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:29:36,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:29:36,902 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-09-20 21:29:36,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 237 treesize of output 204 [2022-09-20 21:29:36,913 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:29:36,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 109 [2022-09-20 21:29:36,928 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:29:36,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-09-20 21:29:44,420 WARN L233 SmtUtils]: Spent 7.08s on a formula simplification. DAG size of input: 74 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-09-20 21:29:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:29:58,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961506931] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:29:58,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:29:58,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 79 [2022-09-20 21:29:58,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159518494] [2022-09-20 21:29:58,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:29:58,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-09-20 21:29:58,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:29:58,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-09-20 21:29:58,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=5841, Unknown=1, NotChecked=0, Total=6162 [2022-09-20 21:29:58,476 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 154 [2022-09-20 21:29:58,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 692 transitions, 10953 flow. Second operand has 79 states, 79 states have (on average 73.40506329113924) internal successors, (5799), 79 states have internal predecessors, (5799), 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) [2022-09-20 21:29:58,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:29:58,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 154 [2022-09-20 21:29:58,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:30:08,947 WARN L233 SmtUtils]: Spent 8.17s on a formula simplification. DAG size of input: 65 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-09-20 21:30:31,162 WARN L233 SmtUtils]: Spent 14.06s on a formula simplification. DAG size of input: 57 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-09-20 21:30:39,054 INFO L130 PetriNetUnfolder]: 4785/14385 cut-off events. [2022-09-20 21:30:39,054 INFO L131 PetriNetUnfolder]: For 241158/242788 co-relation queries the response was YES. [2022-09-20 21:30:39,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91806 conditions, 14385 events. 4785/14385 cut-off events. For 241158/242788 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 159332 event pairs, 893 based on Foata normal form. 660/14623 useless extension candidates. Maximal degree in co-relation 91652. Up to 2893 conditions per place. [2022-09-20 21:30:39,377 INFO L137 encePairwiseOnDemand]: 118/154 looper letters, 548 selfloop transitions, 269 changer transitions 117/1031 dead transitions. [2022-09-20 21:30:39,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 1031 transitions, 17470 flow [2022-09-20 21:30:39,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-09-20 21:30:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-09-20 21:30:39,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 5181 transitions. [2022-09-20 21:30:39,380 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.502132196162047 [2022-09-20 21:30:39,380 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 5181 transitions. [2022-09-20 21:30:39,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 5181 transitions. [2022-09-20 21:30:39,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:30:39,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 5181 transitions. [2022-09-20 21:30:39,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 77.32835820895522) internal successors, (5181), 67 states have internal predecessors, (5181), 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) [2022-09-20 21:30:39,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 154.0) internal successors, (10472), 68 states have internal predecessors, (10472), 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) [2022-09-20 21:30:39,389 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 154.0) internal successors, (10472), 68 states have internal predecessors, (10472), 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) [2022-09-20 21:30:39,389 INFO L175 Difference]: Start difference. First operand has 549 places, 692 transitions, 10953 flow. Second operand 67 states and 5181 transitions. [2022-09-20 21:30:39,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 1031 transitions, 17470 flow [2022-09-20 21:30:40,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 1031 transitions, 16752 flow, removed 222 selfloop flow, removed 55 redundant places. [2022-09-20 21:30:40,437 INFO L231 Difference]: Finished difference. Result has 558 places, 699 transitions, 11324 flow [2022-09-20 21:30:40,437 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=10495, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=11324, PETRI_PLACES=558, PETRI_TRANSITIONS=699} [2022-09-20 21:30:40,437 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 417 predicate places. [2022-09-20 21:30:40,437 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 699 transitions, 11324 flow [2022-09-20 21:30:40,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 73.40506329113924) internal successors, (5799), 79 states have internal predecessors, (5799), 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) [2022-09-20 21:30:40,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:30:40,438 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:30:40,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-09-20 21:30:40,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-09-20 21:30:40,651 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:30:40,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:30:40,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1864482006, now seen corresponding path program 5 times [2022-09-20 21:30:40,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:30:40,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236812573] [2022-09-20 21:30:40,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:30:40,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:30:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:30:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:41,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:30:41,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236812573] [2022-09-20 21:30:41,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236812573] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:30:41,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58561314] [2022-09-20 21:30:41,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 21:30:41,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:41,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:30:41,269 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:30:41,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-09-20 21:30:41,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-09-20 21:30:41,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:30:41,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 48 conjunts are in the unsatisfiable core [2022-09-20 21:30:41,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:30:42,350 INFO L356 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2022-09-20 21:30:42,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 20 [2022-09-20 21:30:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:42,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:30:43,200 INFO L356 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2022-09-20 21:30:43,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 133 treesize of output 101 [2022-09-20 21:30:51,695 WARN L233 SmtUtils]: Spent 8.16s on a formula simplification. DAG size of input: 97 DAG size of output: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-09-20 21:30:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:53,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58561314] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:30:53,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:30:53,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23, 22] total 60 [2022-09-20 21:30:53,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908614909] [2022-09-20 21:30:53,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:30:53,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-09-20 21:30:53,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:30:53,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-09-20 21:30:53,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=3148, Unknown=0, NotChecked=0, Total=3540 [2022-09-20 21:30:53,902 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 154 [2022-09-20 21:30:53,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 699 transitions, 11324 flow. Second operand has 60 states, 60 states have (on average 79.88333333333334) internal successors, (4793), 60 states have internal predecessors, (4793), 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) [2022-09-20 21:30:53,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:30:53,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 154 [2022-09-20 21:30:53,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:31:08,485 WARN L233 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 76 DAG size of output: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-09-20 21:31:13,548 INFO L130 PetriNetUnfolder]: 4695/13742 cut-off events. [2022-09-20 21:31:13,548 INFO L131 PetriNetUnfolder]: For 257486/259013 co-relation queries the response was YES. [2022-09-20 21:31:13,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93057 conditions, 13742 events. 4695/13742 cut-off events. For 257486/259013 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 149266 event pairs, 1040 based on Foata normal form. 353/13541 useless extension candidates. Maximal degree in co-relation 92904. Up to 3534 conditions per place. [2022-09-20 21:31:13,781 INFO L137 encePairwiseOnDemand]: 115/154 looper letters, 512 selfloop transitions, 283 changer transitions 36/932 dead transitions. [2022-09-20 21:31:13,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 932 transitions, 16600 flow [2022-09-20 21:31:13,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-09-20 21:31:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-09-20 21:31:13,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3897 transitions. [2022-09-20 21:31:13,784 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5384084001105278 [2022-09-20 21:31:13,784 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3897 transitions. [2022-09-20 21:31:13,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3897 transitions. [2022-09-20 21:31:13,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:31:13,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3897 transitions. [2022-09-20 21:31:13,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 82.91489361702128) internal successors, (3897), 47 states have internal predecessors, (3897), 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) [2022-09-20 21:31:13,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 154.0) internal successors, (7392), 48 states have internal predecessors, (7392), 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) [2022-09-20 21:31:13,790 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 154.0) internal successors, (7392), 48 states have internal predecessors, (7392), 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) [2022-09-20 21:31:13,790 INFO L175 Difference]: Start difference. First operand has 558 places, 699 transitions, 11324 flow. Second operand 47 states and 3897 transitions. [2022-09-20 21:31:13,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 932 transitions, 16600 flow [2022-09-20 21:31:14,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 932 transitions, 15910 flow, removed 155 selfloop flow, removed 60 redundant places. [2022-09-20 21:31:14,906 INFO L231 Difference]: Finished difference. Result has 541 places, 800 transitions, 13399 flow [2022-09-20 21:31:14,906 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=10834, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=13399, PETRI_PLACES=541, PETRI_TRANSITIONS=800} [2022-09-20 21:31:14,906 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 400 predicate places. [2022-09-20 21:31:14,906 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 800 transitions, 13399 flow [2022-09-20 21:31:14,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 79.88333333333334) internal successors, (4793), 60 states have internal predecessors, (4793), 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) [2022-09-20 21:31:14,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:31:14,907 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:31:14,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-09-20 21:31:15,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-09-20 21:31:15,108 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:31:15,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:31:15,109 INFO L85 PathProgramCache]: Analyzing trace with hash 723746650, now seen corresponding path program 6 times [2022-09-20 21:31:15,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:31:15,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145502359] [2022-09-20 21:31:15,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:31:15,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:31:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:31:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:31:15,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:31:15,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145502359] [2022-09-20 21:31:15,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145502359] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:31:15,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370105112] [2022-09-20 21:31:15,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 21:31:15,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:31:15,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:31:15,743 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:31:15,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-09-20 21:31:15,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-09-20 21:31:15,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:31:15,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 35 conjunts are in the unsatisfiable core [2022-09-20 21:31:15,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:31:16,283 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:31:16,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 14 [2022-09-20 21:31:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:31:16,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:31:16,773 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-09-20 21:31:16,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 58 treesize of output 76 [2022-09-20 21:31:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:31:17,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370105112] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:31:17,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:31:17,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 14, 14] total 44 [2022-09-20 21:31:17,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594136211] [2022-09-20 21:31:17,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:31:17,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-09-20 21:31:17,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:31:17,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-09-20 21:31:17,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1746, Unknown=0, NotChecked=0, Total=1892 [2022-09-20 21:31:17,440 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 154 [2022-09-20 21:31:17,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 800 transitions, 13399 flow. Second operand has 44 states, 44 states have (on average 80.27272727272727) internal successors, (3532), 44 states have internal predecessors, (3532), 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) [2022-09-20 21:31:17,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:31:17,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 154 [2022-09-20 21:31:17,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:31:27,270 INFO L130 PetriNetUnfolder]: 4901/14563 cut-off events. [2022-09-20 21:31:27,270 INFO L131 PetriNetUnfolder]: For 292773/294255 co-relation queries the response was YES. [2022-09-20 21:31:27,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100542 conditions, 14563 events. 4901/14563 cut-off events. For 292773/294255 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 161116 event pairs, 851 based on Foata normal form. 550/14495 useless extension candidates. Maximal degree in co-relation 100389. Up to 1841 conditions per place. [2022-09-20 21:31:27,601 INFO L137 encePairwiseOnDemand]: 123/154 looper letters, 532 selfloop transitions, 385 changer transitions 88/1106 dead transitions. [2022-09-20 21:31:27,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 1106 transitions, 20229 flow [2022-09-20 21:31:27,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-09-20 21:31:27,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-09-20 21:31:27,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 4854 transitions. [2022-09-20 21:31:27,603 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5434393193013882 [2022-09-20 21:31:27,603 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 4854 transitions. [2022-09-20 21:31:27,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 4854 transitions. [2022-09-20 21:31:27,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:31:27,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 4854 transitions. [2022-09-20 21:31:27,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 83.6896551724138) internal successors, (4854), 58 states have internal predecessors, (4854), 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) [2022-09-20 21:31:27,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 154.0) internal successors, (9086), 59 states have internal predecessors, (9086), 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) [2022-09-20 21:31:27,612 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 154.0) internal successors, (9086), 59 states have internal predecessors, (9086), 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) [2022-09-20 21:31:27,612 INFO L175 Difference]: Start difference. First operand has 541 places, 800 transitions, 13399 flow. Second operand 58 states and 4854 transitions. [2022-09-20 21:31:27,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 1106 transitions, 20229 flow [2022-09-20 21:31:28,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 1106 transitions, 19759 flow, removed 206 selfloop flow, removed 28 redundant places. [2022-09-20 21:31:28,929 INFO L231 Difference]: Finished difference. Result has 586 places, 832 transitions, 14606 flow [2022-09-20 21:31:28,930 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=13045, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=355, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=14606, PETRI_PLACES=586, PETRI_TRANSITIONS=832} [2022-09-20 21:31:28,930 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 445 predicate places. [2022-09-20 21:31:28,930 INFO L495 AbstractCegarLoop]: Abstraction has has 586 places, 832 transitions, 14606 flow [2022-09-20 21:31:28,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 80.27272727272727) internal successors, (3532), 44 states have internal predecessors, (3532), 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) [2022-09-20 21:31:28,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:31:28,931 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:31:28,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-09-20 21:31:29,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-09-20 21:31:29,131 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:31:29,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:31:29,132 INFO L85 PathProgramCache]: Analyzing trace with hash -496488016, now seen corresponding path program 7 times [2022-09-20 21:31:29,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:31:29,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058406168] [2022-09-20 21:31:29,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:31:29,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:31:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:31:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:31:35,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:31:35,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058406168] [2022-09-20 21:31:35,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058406168] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:31:35,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862381700] [2022-09-20 21:31:35,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 21:31:35,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:31:35,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:31:35,359 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:31:35,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-09-20 21:31:35,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:31:35,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 57 conjunts are in the unsatisfiable core [2022-09-20 21:31:35,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:31:36,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:31:36,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-09-20 21:31:37,432 INFO L356 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2022-09-20 21:31:37,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 20 [2022-09-20 21:31:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:31:37,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:31:43,869 INFO L356 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2022-09-20 21:31:43,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 129 [2022-09-20 21:31:43,901 INFO L356 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-09-20 21:31:43,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 64 [2022-09-20 21:31:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:31:46,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862381700] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:31:46,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:31:46,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 30, 30] total 89 [2022-09-20 21:31:46,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809429052] [2022-09-20 21:31:46,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:31:46,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-09-20 21:31:46,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:31:46,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-09-20 21:31:46,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=7390, Unknown=6, NotChecked=0, Total=7832 [2022-09-20 21:31:46,850 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 154 [2022-09-20 21:31:46,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 586 places, 832 transitions, 14606 flow. Second operand has 89 states, 89 states have (on average 67.38202247191012) internal successors, (5997), 89 states have internal predecessors, (5997), 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) [2022-09-20 21:31:46,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:31:46,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 154 [2022-09-20 21:31:46,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:32:17,051 WARN L233 SmtUtils]: Spent 8.45s on a formula simplification. DAG size of input: 271 DAG size of output: 185 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-09-20 21:32:39,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-09-20 21:33:32,317 INFO L130 PetriNetUnfolder]: 5070/15307 cut-off events. [2022-09-20 21:33:32,317 INFO L131 PetriNetUnfolder]: For 328702/330279 co-relation queries the response was YES. [2022-09-20 21:33:32,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107612 conditions, 15307 events. 5070/15307 cut-off events. For 328702/330279 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 172435 event pairs, 878 based on Foata normal form. 472/15246 useless extension candidates. Maximal degree in co-relation 107442. Up to 2189 conditions per place. [2022-09-20 21:33:32,594 INFO L137 encePairwiseOnDemand]: 108/154 looper letters, 529 selfloop transitions, 523 changer transitions 27/1170 dead transitions. [2022-09-20 21:33:32,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 1170 transitions, 22590 flow [2022-09-20 21:33:32,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-09-20 21:33:32,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-09-20 21:33:32,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 4953 transitions. [2022-09-20 21:33:32,597 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.45299067130053045 [2022-09-20 21:33:32,597 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 4953 transitions. [2022-09-20 21:33:32,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 4953 transitions. [2022-09-20 21:33:32,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:33:32,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 4953 transitions. [2022-09-20 21:33:32,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 69.7605633802817) internal successors, (4953), 71 states have internal predecessors, (4953), 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) [2022-09-20 21:33:32,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 154.0) internal successors, (11088), 72 states have internal predecessors, (11088), 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) [2022-09-20 21:33:32,606 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 154.0) internal successors, (11088), 72 states have internal predecessors, (11088), 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) [2022-09-20 21:33:32,606 INFO L175 Difference]: Start difference. First operand has 586 places, 832 transitions, 14606 flow. Second operand 71 states and 4953 transitions. [2022-09-20 21:33:32,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 1170 transitions, 22590 flow [2022-09-20 21:33:34,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 601 places, 1170 transitions, 21899 flow, removed 159 selfloop flow, removed 42 redundant places. [2022-09-20 21:33:34,026 INFO L231 Difference]: Finished difference. Result has 623 places, 994 transitions, 18813 flow [2022-09-20 21:33:34,027 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=14095, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=374, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=18813, PETRI_PLACES=623, PETRI_TRANSITIONS=994} [2022-09-20 21:33:34,027 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 482 predicate places. [2022-09-20 21:33:34,027 INFO L495 AbstractCegarLoop]: Abstraction has has 623 places, 994 transitions, 18813 flow [2022-09-20 21:33:34,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 67.38202247191012) internal successors, (5997), 89 states have internal predecessors, (5997), 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) [2022-09-20 21:33:34,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:33:34,028 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:33:34,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-09-20 21:33:34,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-09-20 21:33:34,229 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:33:34,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:33:34,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1204592624, now seen corresponding path program 8 times [2022-09-20 21:33:34,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:33:34,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829634281] [2022-09-20 21:33:34,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:33:34,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:33:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:33:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:33:35,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:33:35,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829634281] [2022-09-20 21:33:35,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829634281] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:33:35,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096509247] [2022-09-20 21:33:35,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:33:35,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:33:35,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:33:35,972 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:33:35,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-09-20 21:33:36,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:33:36,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:33:36,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 67 conjunts are in the unsatisfiable core [2022-09-20 21:33:36,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:33:36,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-09-20 21:33:37,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 21:33:37,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-20 21:33:37,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:33:37,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-09-20 21:33:38,104 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:33:38,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 14 [2022-09-20 21:33:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:33:38,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:33:41,336 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:33:41,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 95 [2022-09-20 21:33:41,413 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-09-20 21:33:41,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1240 treesize of output 1175 [2022-09-20 21:33:41,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-09-20 21:33:41,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-09-20 21:33:41,465 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:33:41,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1021 treesize of output 1000 [2022-09-20 21:33:41,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-09-20 21:33:41,495 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:33:41,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 1034 treesize of output 905 [2022-09-20 21:33:41,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-09-20 21:33:41,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-09-20 21:33:41,545 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-09-20 21:33:41,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 870 treesize of output 760 [2022-09-20 21:33:44,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:33:44,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096509247] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:33:44,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:33:44,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 34, 33] total 92 [2022-09-20 21:33:44,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601553984] [2022-09-20 21:33:44,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:33:44,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-09-20 21:33:44,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:33:44,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-09-20 21:33:44,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=523, Invalid=7815, Unknown=34, NotChecked=0, Total=8372 [2022-09-20 21:33:44,947 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 154 [2022-09-20 21:33:44,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 623 places, 994 transitions, 18813 flow. Second operand has 92 states, 92 states have (on average 67.26086956521739) internal successors, (6188), 92 states have internal predecessors, (6188), 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) [2022-09-20 21:33:44,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:33:44,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 154 [2022-09-20 21:33:44,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:34:14,681 INFO L130 PetriNetUnfolder]: 5399/16804 cut-off events. [2022-09-20 21:34:14,682 INFO L131 PetriNetUnfolder]: For 388117/389701 co-relation queries the response was YES. [2022-09-20 21:34:14,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121423 conditions, 16804 events. 5399/16804 cut-off events. For 388117/389701 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 194821 event pairs, 1005 based on Foata normal form. 487/16771 useless extension candidates. Maximal degree in co-relation 121245. Up to 3008 conditions per place. [2022-09-20 21:34:15,112 INFO L137 encePairwiseOnDemand]: 110/154 looper letters, 608 selfloop transitions, 522 changer transitions 229/1450 dead transitions. [2022-09-20 21:34:15,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 706 places, 1450 transitions, 29470 flow [2022-09-20 21:34:15,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-09-20 21:34:15,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2022-09-20 21:34:15,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 6235 transitions. [2022-09-20 21:34:15,116 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4549102582810448 [2022-09-20 21:34:15,116 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 6235 transitions. [2022-09-20 21:34:15,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 6235 transitions. [2022-09-20 21:34:15,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:34:15,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 6235 transitions. [2022-09-20 21:34:15,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 70.0561797752809) internal successors, (6235), 89 states have internal predecessors, (6235), 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) [2022-09-20 21:34:15,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 154.0) internal successors, (13860), 90 states have internal predecessors, (13860), 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) [2022-09-20 21:34:15,128 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 154.0) internal successors, (13860), 90 states have internal predecessors, (13860), 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) [2022-09-20 21:34:15,128 INFO L175 Difference]: Start difference. First operand has 623 places, 994 transitions, 18813 flow. Second operand 89 states and 6235 transitions. [2022-09-20 21:34:15,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 706 places, 1450 transitions, 29470 flow [2022-09-20 21:34:17,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 670 places, 1450 transitions, 28351 flow, removed 504 selfloop flow, removed 36 redundant places. [2022-09-20 21:34:17,266 INFO L231 Difference]: Finished difference. Result has 719 places, 1037 transitions, 20910 flow [2022-09-20 21:34:17,267 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=18272, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=994, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=20910, PETRI_PLACES=719, PETRI_TRANSITIONS=1037} [2022-09-20 21:34:17,267 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 578 predicate places. [2022-09-20 21:34:17,267 INFO L495 AbstractCegarLoop]: Abstraction has has 719 places, 1037 transitions, 20910 flow [2022-09-20 21:34:17,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 67.26086956521739) internal successors, (6188), 92 states have internal predecessors, (6188), 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) [2022-09-20 21:34:17,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:34:17,268 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:34:17,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-09-20 21:34:17,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:34:17,469 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:34:17,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:34:17,469 INFO L85 PathProgramCache]: Analyzing trace with hash -693380702, now seen corresponding path program 9 times [2022-09-20 21:34:17,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:34:17,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978605095] [2022-09-20 21:34:17,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:34:17,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:34:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:34:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:34:18,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:34:18,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978605095] [2022-09-20 21:34:18,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978605095] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:34:18,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888843427] [2022-09-20 21:34:18,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:34:18,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:34:18,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:34:18,693 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:34:18,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-09-20 21:34:18,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-09-20 21:34:18,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:34:18,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 40 conjunts are in the unsatisfiable core [2022-09-20 21:34:18,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:34:19,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-09-20 21:34:19,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 31 [2022-09-20 21:34:19,680 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:34:19,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 14 [2022-09-20 21:34:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:34:19,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:34:20,075 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1420 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1420) c_~queue~0.base)) (.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296)))) is different from false [2022-09-20 21:34:20,451 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-09-20 21:34:20,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 87 treesize of output 105 [2022-09-20 21:34:20,554 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:34:20,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2022-09-20 21:34:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-09-20 21:34:23,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888843427] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:34:23,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:34:23,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 21, 21] total 66 [2022-09-20 21:34:23,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43793950] [2022-09-20 21:34:23,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:34:23,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-09-20 21:34:23,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:34:23,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-09-20 21:34:23,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=3962, Unknown=2, NotChecked=126, Total=4290 [2022-09-20 21:34:23,403 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2022-09-20 21:34:23,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 719 places, 1037 transitions, 20910 flow. Second operand has 66 states, 66 states have (on average 69.74242424242425) internal successors, (4603), 66 states have internal predecessors, (4603), 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) [2022-09-20 21:34:23,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:34:23,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2022-09-20 21:34:23,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:34:46,359 INFO L130 PetriNetUnfolder]: 5414/16728 cut-off events. [2022-09-20 21:34:46,360 INFO L131 PetriNetUnfolder]: For 438642/440201 co-relation queries the response was YES. [2022-09-20 21:34:46,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128827 conditions, 16728 events. 5414/16728 cut-off events. For 438642/440201 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 192362 event pairs, 885 based on Foata normal form. 534/16677 useless extension candidates. Maximal degree in co-relation 128605. Up to 1892 conditions per place. [2022-09-20 21:34:46,873 INFO L137 encePairwiseOnDemand]: 116/154 looper letters, 674 selfloop transitions, 407 changer transitions 228/1406 dead transitions. [2022-09-20 21:34:46,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 1406 transitions, 30320 flow [2022-09-20 21:34:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-09-20 21:34:46,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-09-20 21:34:46,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 5660 transitions. [2022-09-20 21:34:46,876 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.47119547119547117 [2022-09-20 21:34:46,876 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 5660 transitions. [2022-09-20 21:34:46,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 5660 transitions. [2022-09-20 21:34:46,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:34:46,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 5660 transitions. [2022-09-20 21:34:46,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 72.56410256410257) internal successors, (5660), 78 states have internal predecessors, (5660), 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) [2022-09-20 21:34:46,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 154.0) internal successors, (12166), 79 states have internal predecessors, (12166), 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) [2022-09-20 21:34:46,887 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 154.0) internal successors, (12166), 79 states have internal predecessors, (12166), 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) [2022-09-20 21:34:46,887 INFO L175 Difference]: Start difference. First operand has 719 places, 1037 transitions, 20910 flow. Second operand 78 states and 5660 transitions. [2022-09-20 21:34:46,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 1406 transitions, 30320 flow [2022-09-20 21:34:49,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 683 places, 1406 transitions, 29134 flow, removed 454 selfloop flow, removed 72 redundant places. [2022-09-20 21:34:49,510 INFO L231 Difference]: Finished difference. Result has 716 places, 1024 transitions, 21013 flow [2022-09-20 21:34:49,511 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=20268, PETRI_DIFFERENCE_MINUEND_PLACES=606, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1037, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=21013, PETRI_PLACES=716, PETRI_TRANSITIONS=1024} [2022-09-20 21:34:49,511 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, 575 predicate places. [2022-09-20 21:34:49,511 INFO L495 AbstractCegarLoop]: Abstraction has has 716 places, 1024 transitions, 21013 flow [2022-09-20 21:34:49,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 69.74242424242425) internal successors, (4603), 66 states have internal predecessors, (4603), 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) [2022-09-20 21:34:49,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:34:49,512 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:34:49,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-09-20 21:34:49,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-09-20 21:34:49,715 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 21:34:49,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:34:49,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1351497296, now seen corresponding path program 10 times [2022-09-20 21:34:49,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:34:49,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688352998] [2022-09-20 21:34:49,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:34:49,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:34:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:34:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:34:50,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:34:50,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688352998] [2022-09-20 21:34:50,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688352998] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:34:50,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409208330] [2022-09-20 21:34:50,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:34:50,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:34:50,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:34:50,391 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:34:50,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-09-20 21:34:50,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:34:50,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:34:50,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 50 conjunts are in the unsatisfiable core [2022-09-20 21:34:50,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:34:51,338 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-09-20 21:34:51,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 14 [2022-09-20 21:34:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:34:51,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:34:52,027 INFO L356 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2022-09-20 21:34:52,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 136 treesize of output 103 [2022-09-20 21:35:00,501 WARN L233 SmtUtils]: Spent 8.17s on a formula simplification. DAG size of input: 74 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2022-09-20 21:35:09,015 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-09-20 21:35:09,015 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-09-20 21:35:09,288 WARN L249 SmtUtils]: Removed 4 from assertion stack [2022-09-20 21:35:09,290 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-09-20 21:35:09,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-09-20 21:35:09,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:35:09,491 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 139 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 39 for 4048ms.. [2022-09-20 21:35:09,493 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-09-20 21:35:09,493 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-09-20 21:35:09,493 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-09-20 21:35:09,493 INFO L444 BasicCegarLoop]: Path program histogram: [24, 10, 4, 3, 1, 1] [2022-09-20 21:35:09,495 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-09-20 21:35:09,495 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-09-20 21:35:09,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 09:35:09 BasicIcfg [2022-09-20 21:35:09,498 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-09-20 21:35:09,498 INFO L158 Benchmark]: Toolchain (without parser) took 799125.63ms. Allocated memory was 209.7MB in the beginning and 6.4GB in the end (delta: 6.1GB). Free memory was 155.4MB in the beginning and 2.7GB in the end (delta: -2.5GB). Peak memory consumption was 3.6GB. Max. memory is 8.0GB. [2022-09-20 21:35:09,498 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 209.7MB. Free memory was 172.0MB in the beginning and 171.9MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-09-20 21:35:09,498 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.15ms. Allocated memory is still 209.7MB. Free memory was 155.2MB in the beginning and 181.7MB in the end (delta: -26.4MB). Peak memory consumption was 11.4MB. Max. memory is 8.0GB. [2022-09-20 21:35:09,498 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.12ms. Allocated memory is still 209.7MB. Free memory was 181.7MB in the beginning and 179.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-09-20 21:35:09,498 INFO L158 Benchmark]: Boogie Preprocessor took 17.42ms. Allocated memory is still 209.7MB. Free memory was 179.6MB in the beginning and 178.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-09-20 21:35:09,498 INFO L158 Benchmark]: RCFGBuilder took 430.26ms. Allocated memory is still 209.7MB. Free memory was 178.2MB in the beginning and 155.8MB in the end (delta: 22.3MB). Peak memory consumption was 22.0MB. Max. memory is 8.0GB. [2022-09-20 21:35:09,498 INFO L158 Benchmark]: TraceAbstraction took 798456.28ms. Allocated memory was 209.7MB in the beginning and 6.4GB in the end (delta: 6.1GB). Free memory was 155.1MB in the beginning and 2.7GB in the end (delta: -2.5GB). Peak memory consumption was 3.6GB. Max. memory is 8.0GB. [2022-09-20 21:35:09,502 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 209.7MB. Free memory was 172.0MB in the beginning and 171.9MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 191.15ms. Allocated memory is still 209.7MB. Free memory was 155.2MB in the beginning and 181.7MB in the end (delta: -26.4MB). Peak memory consumption was 11.4MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.12ms. Allocated memory is still 209.7MB. Free memory was 181.7MB in the beginning and 179.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.42ms. Allocated memory is still 209.7MB. Free memory was 179.6MB in the beginning and 178.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 430.26ms. Allocated memory is still 209.7MB. Free memory was 178.2MB in the beginning and 155.8MB in the end (delta: 22.3MB). Peak memory consumption was 22.0MB. Max. memory is 8.0GB. * TraceAbstraction took 798456.28ms. Allocated memory was 209.7MB in the beginning and 6.4GB in the end (delta: 6.1GB). Free memory was 155.1MB in the beginning and 2.7GB in the end (delta: -2.5GB). Peak memory consumption was 3.6GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 139 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 39 for 4048ms.. - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 139 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 39 for 4048ms.. - TimeoutResultAtElement [Line: 103]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 139 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 39 for 4048ms.. - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 139 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 39 for 4048ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 180 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 798.4s, OverallIterations: 43, TraceHistogramMax: 3, PathProgramHistogramMax: 24, EmptinessCheckTime: 0.0s, AutomataDifference: 566.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 31083 SdHoareTripleChecker+Valid, 54.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 31083 mSDsluCounter, 35768 SdHoareTripleChecker+Invalid, 47.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 11953 IncrementalHoareTripleChecker+Unchecked, 55803 mSDsCounter, 5660 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 77700 IncrementalHoareTripleChecker+Invalid, 95315 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5660 mSolverCounterUnsat, 1591 mSDtfsCounter, 77700 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10115 GetRequests, 6757 SyntacticMatches, 113 SemanticMatches, 3245 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 93763 ImplicationChecksByTransitivity, 513.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21013occurred in iteration=42, InterpolantAutomatonStates: 1505, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 198.1s InterpolantComputationTime, 10076 NumberOfCodeBlocks, 9880 NumberOfCodeBlocksAsserted, 101 NumberOfCheckSat, 13022 ConstructedInterpolants, 377 QuantifiedInterpolants, 290036 SizeOfPredicates, 848 NumberOfNonLiveVariables, 10944 ConjunctsInSsa, 1483 ConjunctsInUnsatCore, 100 InterpolantComputations, 22 PerfectInterpolantSequences, 346/1041 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown