/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/stack_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 14:21:22,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 14:21:22,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 14:21:22,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 14:21:22,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 14:21:22,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 14:21:22,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 14:21:22,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 14:21:22,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 14:21:22,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 14:21:22,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 14:21:22,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 14:21:22,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 14:21:22,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 14:21:22,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 14:21:22,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 14:21:22,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 14:21:22,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 14:21:22,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 14:21:22,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 14:21:22,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 14:21:23,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 14:21:23,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 14:21:23,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 14:21:23,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 14:21:23,012 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 14:21:23,012 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 14:21:23,013 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 14:21:23,014 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 14:21:23,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 14:21:23,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 14:21:23,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 14:21:23,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 14:21:23,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 14:21:23,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 14:21:23,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 14:21:23,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 14:21:23,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 14:21:23,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 14:21:23,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 14:21:23,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 14:21:23,024 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-12 14:21:23,046 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 14:21:23,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 14:21:23,047 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 14:21:23,047 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 14:21:23,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 14:21:23,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 14:21:23,048 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 14:21:23,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 14:21:23,049 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 14:21:23,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 14:21:23,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 14:21:23,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 14:21:23,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 14:21:23,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 14:21:23,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 14:21:23,050 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 14:21:23,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 14:21:23,050 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 14:21:23,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 14:21:23,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 14:21:23,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 14:21:23,051 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 14:21:23,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 14:21:23,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 14:21:23,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 14:21:23,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 14:21:23,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 14:21:23,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 14:21:23,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 14:21:23,051 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 14:21:23,052 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-12 14:21:23,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 14:21:23,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 14:21:23,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 14:21:23,332 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 14:21:23,332 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 14:21:23,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-2.i [2022-12-12 14:21:24,331 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 14:21:24,599 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 14:21:24,599 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i [2022-12-12 14:21:24,623 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb7754b1/28232034a9124b09a63c0be5a2b10fb2/FLAG285678d76 [2022-12-12 14:21:24,638 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb7754b1/28232034a9124b09a63c0be5a2b10fb2 [2022-12-12 14:21:24,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 14:21:24,641 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 14:21:24,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 14:21:24,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 14:21:24,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 14:21:24,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 02:21:24" (1/1) ... [2022-12-12 14:21:24,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f2ec0ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:24, skipping insertion in model container [2022-12-12 14:21:24,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 02:21:24" (1/1) ... [2022-12-12 14:21:24,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 14:21:24,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 14:21:24,967 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i[41530,41543] [2022-12-12 14:21:24,990 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 14:21:25,001 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 14:21:25,035 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i[41530,41543] [2022-12-12 14:21:25,046 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 14:21:25,098 INFO L208 MainTranslator]: Completed translation [2022-12-12 14:21:25,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:25 WrapperNode [2022-12-12 14:21:25,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 14:21:25,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 14:21:25,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 14:21:25,101 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 14:21:25,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:25" (1/1) ... [2022-12-12 14:21:25,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:25" (1/1) ... [2022-12-12 14:21:25,160 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 148 [2022-12-12 14:21:25,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 14:21:25,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 14:21:25,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 14:21:25,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 14:21:25,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:25" (1/1) ... [2022-12-12 14:21:25,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:25" (1/1) ... [2022-12-12 14:21:25,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:25" (1/1) ... [2022-12-12 14:21:25,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:25" (1/1) ... [2022-12-12 14:21:25,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:25" (1/1) ... [2022-12-12 14:21:25,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:25" (1/1) ... [2022-12-12 14:21:25,193 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:25" (1/1) ... [2022-12-12 14:21:25,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:25" (1/1) ... [2022-12-12 14:21:25,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 14:21:25,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 14:21:25,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 14:21:25,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 14:21:25,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:25" (1/1) ... [2022-12-12 14:21:25,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 14:21:25,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:21:25,253 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-12 14:21:25,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-12 14:21:25,285 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-12 14:21:25,286 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-12 14:21:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-12 14:21:25,286 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-12 14:21:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 14:21:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 14:21:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 14:21:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 14:21:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-12 14:21:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 14:21:25,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 14:21:25,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 14:21:25,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 14:21:25,290 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 14:21:25,395 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 14:21:25,396 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 14:21:25,643 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 14:21:25,649 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 14:21:25,649 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-12 14:21:25,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 02:21:25 BoogieIcfgContainer [2022-12-12 14:21:25,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 14:21:25,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 14:21:25,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 14:21:25,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 14:21:25,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 02:21:24" (1/3) ... [2022-12-12 14:21:25,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@364b71b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 02:21:25, skipping insertion in model container [2022-12-12 14:21:25,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:21:25" (2/3) ... [2022-12-12 14:21:25,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@364b71b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 02:21:25, skipping insertion in model container [2022-12-12 14:21:25,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 02:21:25" (3/3) ... [2022-12-12 14:21:25,657 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2022-12-12 14:21:25,670 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 14:21:25,670 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-12 14:21:25,670 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 14:21:25,727 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-12 14:21:25,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 150 transitions, 316 flow [2022-12-12 14:21:25,797 INFO L130 PetriNetUnfolder]: 10/148 cut-off events. [2022-12-12 14:21:25,797 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 14:21:25,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 148 events. 10/148 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 353 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 110. Up to 3 conditions per place. [2022-12-12 14:21:25,803 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 150 transitions, 316 flow [2022-12-12 14:21:25,807 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 139 transitions, 287 flow [2022-12-12 14:21:25,808 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 14:21:25,821 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 139 transitions, 287 flow [2022-12-12 14:21:25,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 139 transitions, 287 flow [2022-12-12 14:21:25,852 INFO L130 PetriNetUnfolder]: 10/139 cut-off events. [2022-12-12 14:21:25,852 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 14:21:25,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 139 events. 10/139 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 307 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 110. Up to 3 conditions per place. [2022-12-12 14:21:25,857 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 139 transitions, 287 flow [2022-12-12 14:21:25,857 INFO L226 LiptonReduction]: Number of co-enabled transitions 6382 [2022-12-12 14:21:30,028 INFO L241 LiptonReduction]: Total number of compositions: 116 [2022-12-12 14:21:30,070 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 14:21:30,090 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;@3a4894ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 14:21:30,090 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-12 14:21:30,105 INFO L130 PetriNetUnfolder]: 1/55 cut-off events. [2022-12-12 14:21:30,105 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 14:21:30,105 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:21:30,118 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-12 14:21:30,118 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 14:21:30,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:21:30,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1688471119, now seen corresponding path program 1 times [2022-12-12 14:21:30,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:21:30,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106123213] [2022-12-12 14:21:30,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:30,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:21:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:30,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:30,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:21:30,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106123213] [2022-12-12 14:21:30,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106123213] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 14:21:30,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 14:21:30,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 14:21:30,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847997524] [2022-12-12 14:21:30,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 14:21:30,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 14:21:30,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:21:30,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 14:21:30,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 14:21:30,433 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 110 [2022-12-12 14:21:30,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 110 transitions, 229 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:30,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:21:30,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 110 [2022-12-12 14:21:30,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:21:31,690 INFO L130 PetriNetUnfolder]: 12108/20257 cut-off events. [2022-12-12 14:21:31,691 INFO L131 PetriNetUnfolder]: For 196/196 co-relation queries the response was YES. [2022-12-12 14:21:31,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39810 conditions, 20257 events. 12108/20257 cut-off events. For 196/196 co-relation queries the response was YES. Maximal size of possible extension queue 888. Compared 148702 event pairs, 5729 based on Foata normal form. 0/6684 useless extension candidates. Maximal degree in co-relation 39251. Up to 12849 conditions per place. [2022-12-12 14:21:31,757 INFO L137 encePairwiseOnDemand]: 89/110 looper letters, 149 selfloop transitions, 8 changer transitions 2/171 dead transitions. [2022-12-12 14:21:31,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 171 transitions, 675 flow [2022-12-12 14:21:31,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 14:21:31,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 14:21:31,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2022-12-12 14:21:31,770 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6424242424242425 [2022-12-12 14:21:31,771 INFO L175 Difference]: Start difference. First operand has 111 places, 110 transitions, 229 flow. Second operand 3 states and 212 transitions. [2022-12-12 14:21:31,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 171 transitions, 675 flow [2022-12-12 14:21:31,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 171 transitions, 667 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-12 14:21:31,782 INFO L231 Difference]: Finished difference. Result has 107 places, 108 transitions, 270 flow [2022-12-12 14:21:31,784 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=107, PETRI_TRANSITIONS=108} [2022-12-12 14:21:31,787 INFO L295 CegarLoopForPetriNet]: 111 programPoint places, -4 predicate places. [2022-12-12 14:21:31,787 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 108 transitions, 270 flow [2022-12-12 14:21:31,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:31,787 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:21:31,788 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:21:31,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 14:21:31,789 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 14:21:31,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:21:31,789 INFO L85 PathProgramCache]: Analyzing trace with hash 603354056, now seen corresponding path program 1 times [2022-12-12 14:21:31,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:21:31,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655248424] [2022-12-12 14:21:31,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:31,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:21:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:31,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:21:31,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655248424] [2022-12-12 14:21:31,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655248424] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 14:21:31,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 14:21:31,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 14:21:31,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071906966] [2022-12-12 14:21:31,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 14:21:31,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 14:21:31,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:21:31,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 14:21:31,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 14:21:31,886 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 110 [2022-12-12 14:21:31,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 108 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:31,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:21:31,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 110 [2022-12-12 14:21:31,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:21:32,967 INFO L130 PetriNetUnfolder]: 11932/20366 cut-off events. [2022-12-12 14:21:32,970 INFO L131 PetriNetUnfolder]: For 342/369 co-relation queries the response was YES. [2022-12-12 14:21:33,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41436 conditions, 20366 events. 11932/20366 cut-off events. For 342/369 co-relation queries the response was YES. Maximal size of possible extension queue 1003. Compared 157941 event pairs, 9139 based on Foata normal form. 13/7209 useless extension candidates. Maximal degree in co-relation 36843. Up to 17512 conditions per place. [2022-12-12 14:21:33,041 INFO L137 encePairwiseOnDemand]: 101/110 looper letters, 131 selfloop transitions, 7 changer transitions 0/156 dead transitions. [2022-12-12 14:21:33,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 156 transitions, 661 flow [2022-12-12 14:21:33,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 14:21:33,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 14:21:33,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2022-12-12 14:21:33,045 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5727272727272728 [2022-12-12 14:21:33,045 INFO L175 Difference]: Start difference. First operand has 107 places, 108 transitions, 270 flow. Second operand 3 states and 189 transitions. [2022-12-12 14:21:33,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 156 transitions, 661 flow [2022-12-12 14:21:33,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 156 transitions, 650 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-12 14:21:33,056 INFO L231 Difference]: Finished difference. Result has 107 places, 113 transitions, 309 flow [2022-12-12 14:21:33,057 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=309, PETRI_PLACES=107, PETRI_TRANSITIONS=113} [2022-12-12 14:21:33,057 INFO L295 CegarLoopForPetriNet]: 111 programPoint places, -4 predicate places. [2022-12-12 14:21:33,057 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 113 transitions, 309 flow [2022-12-12 14:21:33,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:33,058 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:21:33,058 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:21:33,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 14:21:33,059 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 14:21:33,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:21:33,059 INFO L85 PathProgramCache]: Analyzing trace with hash 85783273, now seen corresponding path program 1 times [2022-12-12 14:21:33,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:21:33,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738624562] [2022-12-12 14:21:33,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:33,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:21:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:33,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:21:33,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738624562] [2022-12-12 14:21:33,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738624562] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:21:33,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10411064] [2022-12-12 14:21:33,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:33,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:21:33,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:21:33,160 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:21:33,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 14:21:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:33,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-12 14:21:33,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:21:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:33,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:21:33,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:33,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10411064] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:21:33,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:21:33,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-12-12 14:21:33,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020337551] [2022-12-12 14:21:33,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:21:33,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 14:21:33,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:21:33,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 14:21:33,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-12 14:21:33,360 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 110 [2022-12-12 14:21:33,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 113 transitions, 309 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:33,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:21:33,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 110 [2022-12-12 14:21:33,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:21:36,341 INFO L130 PetriNetUnfolder]: 29463/48122 cut-off events. [2022-12-12 14:21:36,341 INFO L131 PetriNetUnfolder]: For 3749/3749 co-relation queries the response was YES. [2022-12-12 14:21:36,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106727 conditions, 48122 events. 29463/48122 cut-off events. For 3749/3749 co-relation queries the response was YES. Maximal size of possible extension queue 1875. Compared 380788 event pairs, 4471 based on Foata normal form. 372/18353 useless extension candidates. Maximal degree in co-relation 100000. Up to 14903 conditions per place. [2022-12-12 14:21:36,478 INFO L137 encePairwiseOnDemand]: 88/110 looper letters, 494 selfloop transitions, 77 changer transitions 173/756 dead transitions. [2022-12-12 14:21:36,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 756 transitions, 3425 flow [2022-12-12 14:21:36,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-12 14:21:36,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-12 14:21:36,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 989 transitions. [2022-12-12 14:21:36,481 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.47320574162679424 [2022-12-12 14:21:36,481 INFO L175 Difference]: Start difference. First operand has 107 places, 113 transitions, 309 flow. Second operand 19 states and 989 transitions. [2022-12-12 14:21:36,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 756 transitions, 3425 flow [2022-12-12 14:21:36,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 756 transitions, 3390 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-12 14:21:36,506 INFO L231 Difference]: Finished difference. Result has 138 places, 188 transitions, 951 flow [2022-12-12 14:21:36,506 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=951, PETRI_PLACES=138, PETRI_TRANSITIONS=188} [2022-12-12 14:21:36,507 INFO L295 CegarLoopForPetriNet]: 111 programPoint places, 27 predicate places. [2022-12-12 14:21:36,508 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 188 transitions, 951 flow [2022-12-12 14:21:36,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:36,508 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:21:36,508 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:21:36,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-12 14:21:36,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:21:36,715 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 14:21:36,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:21:36,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1717678528, now seen corresponding path program 1 times [2022-12-12 14:21:36,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:21:36,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220126553] [2022-12-12 14:21:36,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:36,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:21:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:36,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:21:36,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220126553] [2022-12-12 14:21:36,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220126553] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 14:21:36,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 14:21:36,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 14:21:36,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78579165] [2022-12-12 14:21:36,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 14:21:36,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 14:21:36,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:21:36,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 14:21:36,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 14:21:36,816 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 110 [2022-12-12 14:21:36,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 188 transitions, 951 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:36,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:21:36,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 110 [2022-12-12 14:21:36,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:21:37,832 INFO L130 PetriNetUnfolder]: 8437/15088 cut-off events. [2022-12-12 14:21:37,832 INFO L131 PetriNetUnfolder]: For 5212/5212 co-relation queries the response was YES. [2022-12-12 14:21:37,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35519 conditions, 15088 events. 8437/15088 cut-off events. For 5212/5212 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 117475 event pairs, 1188 based on Foata normal form. 0/6306 useless extension candidates. Maximal degree in co-relation 31510. Up to 11508 conditions per place. [2022-12-12 14:21:37,977 INFO L137 encePairwiseOnDemand]: 88/110 looper letters, 63 selfloop transitions, 12 changer transitions 59/164 dead transitions. [2022-12-12 14:21:37,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 164 transitions, 955 flow [2022-12-12 14:21:37,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 14:21:37,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 14:21:37,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 174 transitions. [2022-12-12 14:21:37,979 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2022-12-12 14:21:37,979 INFO L175 Difference]: Start difference. First operand has 138 places, 188 transitions, 951 flow. Second operand 3 states and 174 transitions. [2022-12-12 14:21:37,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 164 transitions, 955 flow [2022-12-12 14:21:38,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 164 transitions, 868 flow, removed 30 selfloop flow, removed 11 redundant places. [2022-12-12 14:21:38,063 INFO L231 Difference]: Finished difference. Result has 122 places, 85 transitions, 345 flow [2022-12-12 14:21:38,063 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=557, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=345, PETRI_PLACES=122, PETRI_TRANSITIONS=85} [2022-12-12 14:21:38,064 INFO L295 CegarLoopForPetriNet]: 111 programPoint places, 11 predicate places. [2022-12-12 14:21:38,064 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 85 transitions, 345 flow [2022-12-12 14:21:38,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:38,064 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:21:38,065 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:21:38,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-12 14:21:38,065 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 14:21:38,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:21:38,065 INFO L85 PathProgramCache]: Analyzing trace with hash -111124954, now seen corresponding path program 1 times [2022-12-12 14:21:38,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:21:38,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555293446] [2022-12-12 14:21:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:38,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:21:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:38,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:21:38,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555293446] [2022-12-12 14:21:38,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555293446] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 14:21:38,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 14:21:38,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 14:21:38,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005987620] [2022-12-12 14:21:38,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 14:21:38,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 14:21:38,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:21:38,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 14:21:38,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 14:21:38,115 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 110 [2022-12-12 14:21:38,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 85 transitions, 345 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:38,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:21:38,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 110 [2022-12-12 14:21:38,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:21:38,450 INFO L130 PetriNetUnfolder]: 4110/7359 cut-off events. [2022-12-12 14:21:38,450 INFO L131 PetriNetUnfolder]: For 1265/1265 co-relation queries the response was YES. [2022-12-12 14:21:38,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17767 conditions, 7359 events. 4110/7359 cut-off events. For 1265/1265 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 47565 event pairs, 2588 based on Foata normal form. 92/4559 useless extension candidates. Maximal degree in co-relation 13537. Up to 5152 conditions per place. [2022-12-12 14:21:38,473 INFO L137 encePairwiseOnDemand]: 101/110 looper letters, 83 selfloop transitions, 6 changer transitions 11/112 dead transitions. [2022-12-12 14:21:38,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 112 transitions, 622 flow [2022-12-12 14:21:38,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 14:21:38,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 14:21:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2022-12-12 14:21:38,475 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3606060606060606 [2022-12-12 14:21:38,475 INFO L175 Difference]: Start difference. First operand has 122 places, 85 transitions, 345 flow. Second operand 3 states and 119 transitions. [2022-12-12 14:21:38,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 112 transitions, 622 flow [2022-12-12 14:21:38,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 112 transitions, 608 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-12 14:21:38,484 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 322 flow [2022-12-12 14:21:38,484 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=322, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2022-12-12 14:21:38,486 INFO L295 CegarLoopForPetriNet]: 111 programPoint places, -29 predicate places. [2022-12-12 14:21:38,486 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 322 flow [2022-12-12 14:21:38,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:38,486 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:21:38,486 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:21:38,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-12 14:21:38,486 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 14:21:38,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:21:38,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1374922913, now seen corresponding path program 1 times [2022-12-12 14:21:38,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:21:38,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405267715] [2022-12-12 14:21:38,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:38,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:21:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:39,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:21:39,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405267715] [2022-12-12 14:21:39,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405267715] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 14:21:39,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 14:21:39,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-12 14:21:39,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628387546] [2022-12-12 14:21:39,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 14:21:39,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 14:21:39,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:21:39,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 14:21:39,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-12 14:21:39,015 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 110 [2022-12-12 14:21:39,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 322 flow. Second operand has 11 states, 11 states have (on average 17.727272727272727) internal successors, (195), 11 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:39,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:21:39,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 110 [2022-12-12 14:21:39,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:21:40,238 INFO L130 PetriNetUnfolder]: 6921/13235 cut-off events. [2022-12-12 14:21:40,238 INFO L131 PetriNetUnfolder]: For 6198/6209 co-relation queries the response was YES. [2022-12-12 14:21:40,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30946 conditions, 13235 events. 6921/13235 cut-off events. For 6198/6209 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 97720 event pairs, 1770 based on Foata normal form. 0/8082 useless extension candidates. Maximal degree in co-relation 21431. Up to 4940 conditions per place. [2022-12-12 14:21:40,295 INFO L137 encePairwiseOnDemand]: 101/110 looper letters, 178 selfloop transitions, 14 changer transitions 26/238 dead transitions. [2022-12-12 14:21:40,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 238 transitions, 1293 flow [2022-12-12 14:21:40,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 14:21:40,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 14:21:40,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 353 transitions. [2022-12-12 14:21:40,297 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3209090909090909 [2022-12-12 14:21:40,297 INFO L175 Difference]: Start difference. First operand has 82 places, 76 transitions, 322 flow. Second operand 10 states and 353 transitions. [2022-12-12 14:21:40,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 238 transitions, 1293 flow [2022-12-12 14:21:40,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 238 transitions, 1237 flow, removed 14 selfloop flow, removed 2 redundant places. [2022-12-12 14:21:40,312 INFO L231 Difference]: Finished difference. Result has 89 places, 88 transitions, 413 flow [2022-12-12 14:21:40,312 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=413, PETRI_PLACES=89, PETRI_TRANSITIONS=88} [2022-12-12 14:21:40,313 INFO L295 CegarLoopForPetriNet]: 111 programPoint places, -22 predicate places. [2022-12-12 14:21:40,313 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 88 transitions, 413 flow [2022-12-12 14:21:40,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.727272727272727) internal successors, (195), 11 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:40,313 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:21:40,313 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:21:40,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-12 14:21:40,313 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 14:21:40,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:21:40,314 INFO L85 PathProgramCache]: Analyzing trace with hash 378476155, now seen corresponding path program 2 times [2022-12-12 14:21:40,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:21:40,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675472408] [2022-12-12 14:21:40,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:40,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:21:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:40,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:21:40,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675472408] [2022-12-12 14:21:40,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675472408] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 14:21:40,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 14:21:40,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-12 14:21:40,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584333613] [2022-12-12 14:21:40,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 14:21:40,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 14:21:40,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:21:40,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 14:21:40,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-12-12 14:21:40,774 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 110 [2022-12-12 14:21:40,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 88 transitions, 413 flow. Second operand has 11 states, 11 states have (on average 17.727272727272727) internal successors, (195), 11 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:40,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:21:40,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 110 [2022-12-12 14:21:40,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:21:42,327 INFO L130 PetriNetUnfolder]: 10187/19470 cut-off events. [2022-12-12 14:21:42,327 INFO L131 PetriNetUnfolder]: For 8392/8396 co-relation queries the response was YES. [2022-12-12 14:21:42,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46994 conditions, 19470 events. 10187/19470 cut-off events. For 8392/8396 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 154373 event pairs, 1966 based on Foata normal form. 23/12111 useless extension candidates. Maximal degree in co-relation 34026. Up to 5672 conditions per place. [2022-12-12 14:21:42,471 INFO L137 encePairwiseOnDemand]: 102/110 looper letters, 176 selfloop transitions, 22 changer transitions 25/243 dead transitions. [2022-12-12 14:21:42,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 243 transitions, 1377 flow [2022-12-12 14:21:42,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-12 14:21:42,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-12 14:21:42,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 349 transitions. [2022-12-12 14:21:42,473 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.31727272727272726 [2022-12-12 14:21:42,474 INFO L175 Difference]: Start difference. First operand has 89 places, 88 transitions, 413 flow. Second operand 10 states and 349 transitions. [2022-12-12 14:21:42,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 243 transitions, 1377 flow [2022-12-12 14:21:42,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 243 transitions, 1377 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-12 14:21:42,503 INFO L231 Difference]: Finished difference. Result has 100 places, 97 transitions, 554 flow [2022-12-12 14:21:42,504 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=554, PETRI_PLACES=100, PETRI_TRANSITIONS=97} [2022-12-12 14:21:42,504 INFO L295 CegarLoopForPetriNet]: 111 programPoint places, -11 predicate places. [2022-12-12 14:21:42,504 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 97 transitions, 554 flow [2022-12-12 14:21:42,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.727272727272727) internal successors, (195), 11 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:42,504 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:21:42,505 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:21:42,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-12 14:21:42,505 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 14:21:42,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:21:42,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1538941718, now seen corresponding path program 1 times [2022-12-12 14:21:42,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:21:42,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175477349] [2022-12-12 14:21:42,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:42,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:21:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:42,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:42,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:21:42,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175477349] [2022-12-12 14:21:42,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175477349] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:21:42,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185782697] [2022-12-12 14:21:42,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:42,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:21:42,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:21:42,576 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:21:42,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 14:21:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:42,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 14:21:42,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:21:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 14:21:42,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 14:21:42,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185782697] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 14:21:42,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 14:21:42,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-12-12 14:21:42,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136998496] [2022-12-12 14:21:42,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 14:21:42,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-12 14:21:42,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:21:42,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-12 14:21:42,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-12 14:21:42,693 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 110 [2022-12-12 14:21:42,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 97 transitions, 554 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:42,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:21:42,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 110 [2022-12-12 14:21:42,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:21:44,308 INFO L130 PetriNetUnfolder]: 12596/22630 cut-off events. [2022-12-12 14:21:44,309 INFO L131 PetriNetUnfolder]: For 12703/12748 co-relation queries the response was YES. [2022-12-12 14:21:44,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57055 conditions, 22630 events. 12596/22630 cut-off events. For 12703/12748 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 167240 event pairs, 3735 based on Foata normal form. 177/13966 useless extension candidates. Maximal degree in co-relation 42320. Up to 8031 conditions per place. [2022-12-12 14:21:44,408 INFO L137 encePairwiseOnDemand]: 102/110 looper letters, 161 selfloop transitions, 16 changer transitions 0/187 dead transitions. [2022-12-12 14:21:44,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 187 transitions, 1193 flow [2022-12-12 14:21:44,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 14:21:44,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 14:21:44,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 206 transitions. [2022-12-12 14:21:44,409 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.31212121212121213 [2022-12-12 14:21:44,409 INFO L175 Difference]: Start difference. First operand has 100 places, 97 transitions, 554 flow. Second operand 6 states and 206 transitions. [2022-12-12 14:21:44,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 187 transitions, 1193 flow [2022-12-12 14:21:44,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 187 transitions, 1173 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-12-12 14:21:44,451 INFO L231 Difference]: Finished difference. Result has 104 places, 100 transitions, 605 flow [2022-12-12 14:21:44,451 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=605, PETRI_PLACES=104, PETRI_TRANSITIONS=100} [2022-12-12 14:21:44,452 INFO L295 CegarLoopForPetriNet]: 111 programPoint places, -7 predicate places. [2022-12-12 14:21:44,452 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 100 transitions, 605 flow [2022-12-12 14:21:44,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:44,452 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:21:44,452 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2022-12-12 14:21:44,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 14:21:44,657 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,SelfDestructingSolverStorable7 [2022-12-12 14:21:44,657 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 14:21:44,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:21:44,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1297883625, now seen corresponding path program 2 times [2022-12-12 14:21:44,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:21:44,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89399426] [2022-12-12 14:21:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:44,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:21:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:44,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:21:44,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89399426] [2022-12-12 14:21:44,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89399426] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:21:44,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783073103] [2022-12-12 14:21:44,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 14:21:44,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:21:44,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:21:44,770 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:21:44,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 14:21:44,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 14:21:44,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:21:44,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 14:21:44,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:21:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:44,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:21:45,007 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:45,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783073103] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:21:45,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:21:45,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-12-12 14:21:45,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329997686] [2022-12-12 14:21:45,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:21:45,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-12 14:21:45,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:21:45,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-12 14:21:45,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-12-12 14:21:45,009 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 110 [2022-12-12 14:21:45,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 100 transitions, 605 flow. Second operand has 18 states, 18 states have (on average 15.444444444444445) internal successors, (278), 18 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:45,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:21:45,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 110 [2022-12-12 14:21:45,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:21:48,076 INFO L130 PetriNetUnfolder]: 18876/33681 cut-off events. [2022-12-12 14:21:48,076 INFO L131 PetriNetUnfolder]: For 29896/29896 co-relation queries the response was YES. [2022-12-12 14:21:48,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88662 conditions, 33681 events. 18876/33681 cut-off events. For 29896/29896 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 244242 event pairs, 4084 based on Foata normal form. 260/20749 useless extension candidates. Maximal degree in co-relation 53666. Up to 9963 conditions per place. [2022-12-12 14:21:48,638 INFO L137 encePairwiseOnDemand]: 104/110 looper letters, 405 selfloop transitions, 31 changer transitions 10/456 dead transitions. [2022-12-12 14:21:48,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 456 transitions, 2805 flow [2022-12-12 14:21:48,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 14:21:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 14:21:48,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 600 transitions. [2022-12-12 14:21:48,640 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.32085561497326204 [2022-12-12 14:21:48,640 INFO L175 Difference]: Start difference. First operand has 104 places, 100 transitions, 605 flow. Second operand 17 states and 600 transitions. [2022-12-12 14:21:48,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 456 transitions, 2805 flow [2022-12-12 14:21:48,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 456 transitions, 2801 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-12-12 14:21:48,698 INFO L231 Difference]: Finished difference. Result has 124 places, 116 transitions, 843 flow [2022-12-12 14:21:48,699 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=843, PETRI_PLACES=124, PETRI_TRANSITIONS=116} [2022-12-12 14:21:48,699 INFO L295 CegarLoopForPetriNet]: 111 programPoint places, 13 predicate places. [2022-12-12 14:21:48,699 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 116 transitions, 843 flow [2022-12-12 14:21:48,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.444444444444445) internal successors, (278), 18 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:48,700 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:21:48,700 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:21:48,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 14:21:48,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:21:48,904 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 14:21:48,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:21:48,905 INFO L85 PathProgramCache]: Analyzing trace with hash 380023960, now seen corresponding path program 1 times [2022-12-12 14:21:48,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:21:48,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100717056] [2022-12-12 14:21:48,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:48,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:21:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 14:21:49,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:21:49,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100717056] [2022-12-12 14:21:49,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100717056] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 14:21:49,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 14:21:49,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-12 14:21:49,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067008750] [2022-12-12 14:21:49,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 14:21:49,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-12 14:21:49,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:21:49,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-12 14:21:49,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-12-12 14:21:49,399 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 110 [2022-12-12 14:21:49,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 116 transitions, 843 flow. Second operand has 15 states, 15 states have (on average 11.866666666666667) internal successors, (178), 15 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:49,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:21:49,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 110 [2022-12-12 14:21:49,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:21:55,058 INFO L130 PetriNetUnfolder]: 28711/50992 cut-off events. [2022-12-12 14:21:55,059 INFO L131 PetriNetUnfolder]: For 53660/53660 co-relation queries the response was YES. [2022-12-12 14:21:55,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140840 conditions, 50992 events. 28711/50992 cut-off events. For 53660/53660 co-relation queries the response was YES. Maximal size of possible extension queue 958. Compared 393538 event pairs, 5935 based on Foata normal form. 46/31135 useless extension candidates. Maximal degree in co-relation 108822. Up to 13544 conditions per place. [2022-12-12 14:21:55,380 INFO L137 encePairwiseOnDemand]: 94/110 looper letters, 347 selfloop transitions, 133 changer transitions 8/498 dead transitions. [2022-12-12 14:21:55,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 498 transitions, 3709 flow [2022-12-12 14:21:55,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-12 14:21:55,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-12 14:21:55,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 625 transitions. [2022-12-12 14:21:55,383 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.19592476489028213 [2022-12-12 14:21:55,383 INFO L175 Difference]: Start difference. First operand has 124 places, 116 transitions, 843 flow. Second operand 29 states and 625 transitions. [2022-12-12 14:21:55,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 498 transitions, 3709 flow [2022-12-12 14:21:55,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 498 transitions, 3432 flow, removed 96 selfloop flow, removed 7 redundant places. [2022-12-12 14:21:55,541 INFO L231 Difference]: Finished difference. Result has 152 places, 214 transitions, 1877 flow [2022-12-12 14:21:55,541 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1877, PETRI_PLACES=152, PETRI_TRANSITIONS=214} [2022-12-12 14:21:55,541 INFO L295 CegarLoopForPetriNet]: 111 programPoint places, 41 predicate places. [2022-12-12 14:21:55,541 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 214 transitions, 1877 flow [2022-12-12 14:21:55,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.866666666666667) internal successors, (178), 15 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:55,542 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:21:55,542 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:21:55,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-12 14:21:55,542 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 14:21:55,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:21:55,542 INFO L85 PathProgramCache]: Analyzing trace with hash -7902112, now seen corresponding path program 2 times [2022-12-12 14:21:55,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:21:55,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546595058] [2022-12-12 14:21:55,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:21:55,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:21:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:21:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:21:57,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:21:57,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546595058] [2022-12-12 14:21:57,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546595058] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:21:57,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038325039] [2022-12-12 14:21:57,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 14:21:57,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:21:57,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:21:57,096 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:21:57,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 14:21:57,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-12 14:21:57,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:21:57,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-12 14:21:57,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:21:57,213 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-12 14:21:57,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-12 14:21:57,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-12 14:21:57,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2022-12-12 14:21:58,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2022-12-12 14:21:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 14:21:58,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:21:58,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 14:21:58,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-12 14:21:58,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 14:21:58,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-12-12 14:21:58,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-12-12 14:21:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 14:21:59,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038325039] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:21:59,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:21:59,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 47 [2022-12-12 14:21:59,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9337686] [2022-12-12 14:21:59,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:21:59,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-12 14:21:59,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:21:59,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-12 14:21:59,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2099, Unknown=10, NotChecked=0, Total=2352 [2022-12-12 14:21:59,191 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 110 [2022-12-12 14:21:59,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 214 transitions, 1877 flow. Second operand has 49 states, 49 states have (on average 11.714285714285714) internal successors, (574), 49 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:21:59,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:21:59,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 110 [2022-12-12 14:21:59,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:22:21,362 INFO L130 PetriNetUnfolder]: 42717/76153 cut-off events. [2022-12-12 14:22:21,363 INFO L131 PetriNetUnfolder]: For 93087/93087 co-relation queries the response was YES. [2022-12-12 14:22:21,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215165 conditions, 76153 events. 42717/76153 cut-off events. For 93087/93087 co-relation queries the response was YES. Maximal size of possible extension queue 1583. Compared 622143 event pairs, 4621 based on Foata normal form. 46/46465 useless extension candidates. Maximal degree in co-relation 163852. Up to 21211 conditions per place. [2022-12-12 14:22:22,099 INFO L137 encePairwiseOnDemand]: 95/110 looper letters, 597 selfloop transitions, 245 changer transitions 28/880 dead transitions. [2022-12-12 14:22:22,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 880 transitions, 6391 flow [2022-12-12 14:22:22,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-12 14:22:22,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-12-12 14:22:22,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 1136 transitions. [2022-12-12 14:22:22,102 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.20654545454545453 [2022-12-12 14:22:22,102 INFO L175 Difference]: Start difference. First operand has 152 places, 214 transitions, 1877 flow. Second operand 50 states and 1136 transitions. [2022-12-12 14:22:22,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 880 transitions, 6391 flow [2022-12-12 14:22:22,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 880 transitions, 6349 flow, removed 16 selfloop flow, removed 4 redundant places. [2022-12-12 14:22:22,598 INFO L231 Difference]: Finished difference. Result has 204 places, 317 transitions, 3418 flow [2022-12-12 14:22:22,598 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=1843, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=3418, PETRI_PLACES=204, PETRI_TRANSITIONS=317} [2022-12-12 14:22:22,599 INFO L295 CegarLoopForPetriNet]: 111 programPoint places, 93 predicate places. [2022-12-12 14:22:22,599 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 317 transitions, 3418 flow [2022-12-12 14:22:22,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 11.714285714285714) internal successors, (574), 49 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:22:22,599 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:22:22,599 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:22:22,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-12 14:22:22,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:22:22,804 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 14:22:22,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:22:22,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1420237392, now seen corresponding path program 2 times [2022-12-12 14:22:22,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:22:22,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171089630] [2022-12-12 14:22:22,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:22:22,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:22:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:22:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 14:22:22,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:22:22,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171089630] [2022-12-12 14:22:22,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171089630] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:22:22,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573583062] [2022-12-12 14:22:22,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 14:22:22,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:22:22,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:22:22,908 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:22:22,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 14:22:23,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 14:22:23,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:22:23,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 14:22:23,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:22:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 14:22:23,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:22:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-12 14:22:23,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573583062] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:22:23,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:22:23,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-12 14:22:23,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318025491] [2022-12-12 14:22:23,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:22:23,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-12 14:22:23,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:22:23,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-12 14:22:23,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-12-12 14:22:23,128 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 110 [2022-12-12 14:22:23,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 317 transitions, 3418 flow. Second operand has 16 states, 16 states have (on average 16.4375) internal successors, (263), 16 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:22:23,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:22:23,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 110 [2022-12-12 14:22:23,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:22:31,906 INFO L130 PetriNetUnfolder]: 44537/79196 cut-off events. [2022-12-12 14:22:31,906 INFO L131 PetriNetUnfolder]: For 144278/144278 co-relation queries the response was YES. [2022-12-12 14:22:32,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235644 conditions, 79196 events. 44537/79196 cut-off events. For 144278/144278 co-relation queries the response was YES. Maximal size of possible extension queue 1235. Compared 646282 event pairs, 7584 based on Foata normal form. 270/48517 useless extension candidates. Maximal degree in co-relation 209212. Up to 20239 conditions per place. [2022-12-12 14:22:32,604 INFO L137 encePairwiseOnDemand]: 102/110 looper letters, 411 selfloop transitions, 193 changer transitions 13/627 dead transitions. [2022-12-12 14:22:32,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 627 transitions, 6426 flow [2022-12-12 14:22:32,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-12 14:22:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-12 14:22:32,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 494 transitions. [2022-12-12 14:22:32,621 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.2641711229946524 [2022-12-12 14:22:32,621 INFO L175 Difference]: Start difference. First operand has 204 places, 317 transitions, 3418 flow. Second operand 17 states and 494 transitions. [2022-12-12 14:22:32,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 627 transitions, 6426 flow [2022-12-12 14:22:33,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 627 transitions, 5900 flow, removed 171 selfloop flow, removed 10 redundant places. [2022-12-12 14:22:33,954 INFO L231 Difference]: Finished difference. Result has 214 places, 333 transitions, 3825 flow [2022-12-12 14:22:33,955 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=2969, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3825, PETRI_PLACES=214, PETRI_TRANSITIONS=333} [2022-12-12 14:22:33,956 INFO L295 CegarLoopForPetriNet]: 111 programPoint places, 103 predicate places. [2022-12-12 14:22:33,956 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 333 transitions, 3825 flow [2022-12-12 14:22:33,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.4375) internal successors, (263), 16 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:22:33,956 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:22:33,956 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:22:33,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-12 14:22:34,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-12 14:22:34,161 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 14:22:34,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:22:34,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1199579638, now seen corresponding path program 1 times [2022-12-12 14:22:34,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:22:34,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292534197] [2022-12-12 14:22:34,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:22:34,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:22:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:22:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:22:34,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:22:34,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292534197] [2022-12-12 14:22:34,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292534197] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:22:34,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005261499] [2022-12-12 14:22:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:22:34,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:22:34,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:22:34,963 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:22:34,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-12 14:22:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:22:35,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-12 14:22:35,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:22:35,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-12 14:22:35,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 14:22:35,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 41 [2022-12-12 14:22:36,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2022-12-12 14:22:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:22:36,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:22:39,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-12-12 14:22:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:22:39,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005261499] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:22:39,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:22:39,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2022-12-12 14:22:39,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877565883] [2022-12-12 14:22:39,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:22:39,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-12 14:22:39,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:22:39,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-12 14:22:39,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3117, Unknown=1, NotChecked=0, Total=3306 [2022-12-12 14:22:39,570 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 110 [2022-12-12 14:22:39,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 333 transitions, 3825 flow. Second operand has 58 states, 58 states have (on average 11.913793103448276) internal successors, (691), 58 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:22:39,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:22:39,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 110 [2022-12-12 14:22:39,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:23:19,663 INFO L130 PetriNetUnfolder]: 81016/144660 cut-off events. [2022-12-12 14:23:19,663 INFO L131 PetriNetUnfolder]: For 250835/250835 co-relation queries the response was YES. [2022-12-12 14:23:20,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440109 conditions, 144660 events. 81016/144660 cut-off events. For 250835/250835 co-relation queries the response was YES. Maximal size of possible extension queue 2655. Compared 1309800 event pairs, 8446 based on Foata normal form. 92/88632 useless extension candidates. Maximal degree in co-relation 371749. Up to 17442 conditions per place. [2022-12-12 14:23:21,117 INFO L137 encePairwiseOnDemand]: 93/110 looper letters, 1093 selfloop transitions, 502 changer transitions 31/1636 dead transitions. [2022-12-12 14:23:21,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 1636 transitions, 14488 flow [2022-12-12 14:23:21,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-12-12 14:23:21,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-12-12 14:23:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 2065 transitions. [2022-12-12 14:23:21,122 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.189623507805326 [2022-12-12 14:23:21,122 INFO L175 Difference]: Start difference. First operand has 214 places, 333 transitions, 3825 flow. Second operand 99 states and 2065 transitions. [2022-12-12 14:23:21,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 1636 transitions, 14488 flow [2022-12-12 14:23:24,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 1636 transitions, 13996 flow, removed 125 selfloop flow, removed 6 redundant places. [2022-12-12 14:23:24,623 INFO L231 Difference]: Finished difference. Result has 315 places, 606 transitions, 8104 flow [2022-12-12 14:23:24,624 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=3637, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=8104, PETRI_PLACES=315, PETRI_TRANSITIONS=606} [2022-12-12 14:23:24,624 INFO L295 CegarLoopForPetriNet]: 111 programPoint places, 204 predicate places. [2022-12-12 14:23:24,624 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 606 transitions, 8104 flow [2022-12-12 14:23:24,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 11.913793103448276) internal successors, (691), 58 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:23:24,625 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:23:24,625 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:23:24,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-12 14:23:24,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:23:24,829 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 14:23:24,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:23:24,830 INFO L85 PathProgramCache]: Analyzing trace with hash -748900868, now seen corresponding path program 2 times [2022-12-12 14:23:24,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:23:24,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594498354] [2022-12-12 14:23:24,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:23:24,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:23:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:23:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:23:25,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:23:25,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594498354] [2022-12-12 14:23:25,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594498354] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:23:25,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169222466] [2022-12-12 14:23:25,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 14:23:25,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:23:25,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:23:25,916 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:23:25,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-12 14:23:26,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 14:23:26,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:23:26,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 75 conjunts are in the unsatisfiable core [2022-12-12 14:23:26,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:23:26,069 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-12 14:23:26,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-12 14:23:26,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-12 14:23:26,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2022-12-12 14:23:26,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 14:23:26,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 41 [2022-12-12 14:23:27,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2022-12-12 14:23:27,133 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:23:27,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:23:28,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 14:23:28,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-12 14:23:28,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 14:23:28,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-12-12 14:23:28,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-12-12 14:23:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:23:28,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169222466] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:23:28,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:23:28,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 20] total 64 [2022-12-12 14:23:28,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891309280] [2022-12-12 14:23:28,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:23:28,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-12-12 14:23:28,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:23:28,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-12-12 14:23:28,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=4040, Unknown=14, NotChecked=0, Total=4290 [2022-12-12 14:23:28,716 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 110 [2022-12-12 14:23:28,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 606 transitions, 8104 flow. Second operand has 66 states, 66 states have (on average 11.681818181818182) internal successors, (771), 66 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:23:28,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:23:28,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 110 [2022-12-12 14:23:28,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:24:22,060 INFO L130 PetriNetUnfolder]: 101826/181742 cut-off events. [2022-12-12 14:24:22,060 INFO L131 PetriNetUnfolder]: For 371964/371964 co-relation queries the response was YES. [2022-12-12 14:24:24,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573538 conditions, 181742 events. 101826/181742 cut-off events. For 371964/371964 co-relation queries the response was YES. Maximal size of possible extension queue 2666. Compared 1661758 event pairs, 8923 based on Foata normal form. 46/111440 useless extension candidates. Maximal degree in co-relation 503334. Up to 33086 conditions per place. [2022-12-12 14:24:24,546 INFO L137 encePairwiseOnDemand]: 92/110 looper letters, 921 selfloop transitions, 830 changer transitions 47/1808 dead transitions. [2022-12-12 14:24:24,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 1808 transitions, 18742 flow [2022-12-12 14:24:24,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-12-12 14:24:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2022-12-12 14:24:24,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 1971 transitions. [2022-12-12 14:24:24,553 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.1828385899814471 [2022-12-12 14:24:24,553 INFO L175 Difference]: Start difference. First operand has 315 places, 606 transitions, 8104 flow. Second operand 98 states and 1971 transitions. [2022-12-12 14:24:24,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 1808 transitions, 18742 flow [2022-12-12 14:24:28,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 1808 transitions, 17831 flow, removed 59 selfloop flow, removed 15 redundant places. [2022-12-12 14:24:28,344 INFO L231 Difference]: Finished difference. Result has 409 places, 924 transitions, 13448 flow [2022-12-12 14:24:28,345 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=7485, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=514, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=13448, PETRI_PLACES=409, PETRI_TRANSITIONS=924} [2022-12-12 14:24:28,345 INFO L295 CegarLoopForPetriNet]: 111 programPoint places, 298 predicate places. [2022-12-12 14:24:28,345 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 924 transitions, 13448 flow [2022-12-12 14:24:28,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 11.681818181818182) internal successors, (771), 66 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:24:28,346 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:24:28,346 INFO L214 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:24:28,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-12 14:24:28,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:24:28,551 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-12 14:24:28,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:24:28,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1944390064, now seen corresponding path program 3 times [2022-12-12 14:24:28,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:24:28,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160613828] [2022-12-12 14:24:28,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:24:28,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:24:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:24:28,728 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-12 14:24:28,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:24:28,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160613828] [2022-12-12 14:24:28,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160613828] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:24:28,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491330485] [2022-12-12 14:24:28,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 14:24:28,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:24:28,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:24:28,730 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:24:28,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-12 14:24:28,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-12 14:24:28,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:24:28,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 14:24:28,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:24:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-12 14:24:28,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:24:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-12 14:24:29,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491330485] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:24:29,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:24:29,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-12-12 14:24:29,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584326341] [2022-12-12 14:24:29,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:24:29,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-12 14:24:29,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:24:29,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-12 14:24:29,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-12-12 14:24:29,097 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 110 [2022-12-12 14:24:29,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 924 transitions, 13448 flow. Second operand has 20 states, 20 states have (on average 16.35) internal successors, (327), 20 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:24:29,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:24:29,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 110 [2022-12-12 14:24:29,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand