/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-0612a5f-m [2022-09-20 20:43:26,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-20 20:43:26,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-20 20:43:26,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-20 20:43:26,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-20 20:43:26,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-20 20:43:26,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-20 20:43:26,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-20 20:43:26,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-20 20:43:26,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-20 20:43:26,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-20 20:43:26,077 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-20 20:43:26,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-20 20:43:26,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-20 20:43:26,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-20 20:43:26,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-20 20:43:26,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-20 20:43:26,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-20 20:43:26,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-20 20:43:26,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-20 20:43:26,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-20 20:43:26,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-20 20:43:26,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-20 20:43:26,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-20 20:43:26,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-20 20:43:26,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-20 20:43:26,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-20 20:43:26,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-20 20:43:26,092 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-20 20:43:26,093 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-20 20:43:26,093 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-20 20:43:26,094 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-20 20:43:26,094 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-20 20:43:26,095 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-20 20:43:26,096 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-20 20:43:26,096 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-20 20:43:26,097 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-20 20:43:26,097 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-20 20:43:26,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-20 20:43:26,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-20 20:43:26,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-20 20:43:26,099 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2022-09-20 20:43:26,116 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-20 20:43:26,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-20 20:43:26,117 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-20 20:43:26,117 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-20 20:43:26,118 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-20 20:43:26,118 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-20 20:43:26,118 INFO L138 SettingsManager]: * Use SBE=true [2022-09-20 20:43:26,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-20 20:43:26,118 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-20 20:43:26,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-20 20:43:26,119 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-20 20:43:26,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-20 20:43:26,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-20 20:43:26,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-20 20:43:26,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-20 20:43:26,119 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-20 20:43:26,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-20 20:43:26,120 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-20 20:43:26,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-20 20:43:26,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-20 20:43:26,120 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-20 20:43:26,120 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-20 20:43:26,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-20 20:43:26,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 20:43:26,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-20 20:43:26,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-20 20:43:26,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-20 20:43:26,121 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-20 20:43:26,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-20 20:43:26,121 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-20 20:43:26,121 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-20 20:43:26,121 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-20 20:43:26,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-20 20:43:26,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-20 20:43:26,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-20 20:43:26,361 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-20 20:43:26,362 INFO L275 PluginConnector]: CDTParser initialized [2022-09-20 20:43:26,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2022-09-20 20:43:26,423 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d693f66eb/6f31ef75e8c14e9a8039f7d509ca26d2/FLAG4480054d4 [2022-09-20 20:43:26,918 INFO L306 CDTParser]: Found 1 translation units. [2022-09-20 20:43:26,919 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2022-09-20 20:43:26,949 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d693f66eb/6f31ef75e8c14e9a8039f7d509ca26d2/FLAG4480054d4 [2022-09-20 20:43:27,442 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d693f66eb/6f31ef75e8c14e9a8039f7d509ca26d2 [2022-09-20 20:43:27,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-20 20:43:27,445 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-20 20:43:27,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-20 20:43:27,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-20 20:43:27,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-20 20:43:27,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 08:43:27" (1/1) ... [2022-09-20 20:43:27,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cae7e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:43:27, skipping insertion in model container [2022-09-20 20:43:27,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 08:43:27" (1/1) ... [2022-09-20 20:43:27,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-20 20:43:27,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-20 20:43:27,653 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-09-20 20:43:27,920 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 20:43:27,929 INFO L203 MainTranslator]: Completed pre-run [2022-09-20 20:43:27,939 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-09-20 20:43:27,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 20:43:28,024 INFO L208 MainTranslator]: Completed translation [2022-09-20 20:43:28,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:43:28 WrapperNode [2022-09-20 20:43:28,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-20 20:43:28,025 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-20 20:43:28,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-20 20:43:28,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-20 20:43:28,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:43:28" (1/1) ... [2022-09-20 20:43:28,061 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:43:28" (1/1) ... [2022-09-20 20:43:28,085 INFO L138 Inliner]: procedures = 364, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-09-20 20:43:28,085 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-20 20:43:28,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-20 20:43:28,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-20 20:43:28,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-20 20:43:28,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:43:28" (1/1) ... [2022-09-20 20:43:28,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:43:28" (1/1) ... [2022-09-20 20:43:28,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:43:28" (1/1) ... [2022-09-20 20:43:28,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:43:28" (1/1) ... [2022-09-20 20:43:28,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:43:28" (1/1) ... [2022-09-20 20:43:28,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:43:28" (1/1) ... [2022-09-20 20:43:28,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:43:28" (1/1) ... [2022-09-20 20:43:28,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-20 20:43:28,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-20 20:43:28,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-20 20:43:28,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-20 20:43:28,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:43:28" (1/1) ... [2022-09-20 20:43:28,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 20:43:28,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:43:28,152 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-09-20 20:43:28,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-20 20:43:28,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-20 20:43:28,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-20 20:43:28,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-20 20:43:28,195 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-09-20 20:43:28,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-09-20 20:43:28,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-20 20:43:28,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2022-09-20 20:43:28,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2022-09-20 20:43:28,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-20 20:43:28,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-20 20:43:28,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-20 20:43:28,198 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-20 20:43:28,356 INFO L234 CfgBuilder]: Building ICFG [2022-09-20 20:43:28,357 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-20 20:43:28,474 INFO L275 CfgBuilder]: Performing block encoding [2022-09-20 20:43:28,480 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-20 20:43:28,480 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-09-20 20:43:28,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 08:43:28 BoogieIcfgContainer [2022-09-20 20:43:28,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-20 20:43:28,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-20 20:43:28,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-20 20:43:28,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-20 20:43:28,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 08:43:27" (1/3) ... [2022-09-20 20:43:28,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@187ec9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 08:43:28, skipping insertion in model container [2022-09-20 20:43:28,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:43:28" (2/3) ... [2022-09-20 20:43:28,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@187ec9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 08:43:28, skipping insertion in model container [2022-09-20 20:43:28,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 08:43:28" (3/3) ... [2022-09-20 20:43:28,490 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2022-09-20 20:43:28,504 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-20 20:43:28,504 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-09-20 20:43:28,504 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-20 20:43:28,556 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-09-20 20:43:28,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 97 transitions, 202 flow [2022-09-20 20:43:28,630 INFO L130 PetriNetUnfolder]: 7/96 cut-off events. [2022-09-20 20:43:28,630 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-09-20 20:43:28,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 96 events. 7/96 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2022-09-20 20:43:28,637 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 97 transitions, 202 flow [2022-09-20 20:43:28,640 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 86 transitions, 178 flow [2022-09-20 20:43:28,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 20:43:28,658 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;@148c3d55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 20:43:28,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-09-20 20:43:28,699 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2022-09-20 20:43:28,700 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-09-20 20:43:28,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:43:28,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:43:28,702 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:43:28,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:43:28,707 INFO L85 PathProgramCache]: Analyzing trace with hash 859936917, now seen corresponding path program 1 times [2022-09-20 20:43:28,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:43:28,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753901804] [2022-09-20 20:43:28,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:43:28,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:43:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:43:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:43:28,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:43:28,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753901804] [2022-09-20 20:43:28,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753901804] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:43:28,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:43:28,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 20:43:28,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186398534] [2022-09-20 20:43:28,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:43:28,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-09-20 20:43:28,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:43:28,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-09-20 20:43:29,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-09-20 20:43:29,004 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 97 [2022-09-20 20:43:29,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 178 flow. Second operand has 2 states, 2 states have (on average 88.5) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:29,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:43:29,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 97 [2022-09-20 20:43:29,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:43:29,055 INFO L130 PetriNetUnfolder]: 2/80 cut-off events. [2022-09-20 20:43:29,056 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-09-20 20:43:29,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 80 events. 2/80 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 4/81 useless extension candidates. Maximal degree in co-relation 35. Up to 3 conditions per place. [2022-09-20 20:43:29,057 INFO L137 encePairwiseOnDemand]: 93/97 looper letters, 2 selfloop transitions, 0 changer transitions 0/80 dead transitions. [2022-09-20 20:43:29,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 170 flow [2022-09-20 20:43:29,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-20 20:43:29,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-09-20 20:43:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 180 transitions. [2022-09-20 20:43:29,070 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9278350515463918 [2022-09-20 20:43:29,071 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 180 transitions. [2022-09-20 20:43:29,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 180 transitions. [2022-09-20 20:43:29,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:43:29,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 180 transitions. [2022-09-20 20:43:29,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 90.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:29,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:29,088 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:29,090 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 178 flow. Second operand 2 states and 180 transitions. [2022-09-20 20:43:29,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 170 flow [2022-09-20 20:43:29,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 80 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-09-20 20:43:29,098 INFO L231 Difference]: Finished difference. Result has 81 places, 80 transitions, 162 flow [2022-09-20 20:43:29,099 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=162, PETRI_PLACES=81, PETRI_TRANSITIONS=80} [2022-09-20 20:43:29,102 INFO L287 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2022-09-20 20:43:29,102 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 80 transitions, 162 flow [2022-09-20 20:43:29,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 88.5) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:29,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:43:29,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:43:29,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-20 20:43:29,104 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:43:29,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:43:29,104 INFO L85 PathProgramCache]: Analyzing trace with hash -137135436, now seen corresponding path program 1 times [2022-09-20 20:43:29,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:43:29,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787611929] [2022-09-20 20:43:29,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:43:29,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:43:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:43:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:43:29,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:43:29,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787611929] [2022-09-20 20:43:29,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787611929] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:43:29,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:43:29,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 20:43:29,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735881688] [2022-09-20 20:43:29,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:43:29,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 20:43:29,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:43:29,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 20:43:29,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 20:43:29,179 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 97 [2022-09-20 20:43:29,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 80 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:29,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:43:29,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 97 [2022-09-20 20:43:29,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:43:29,219 INFO L130 PetriNetUnfolder]: 2/87 cut-off events. [2022-09-20 20:43:29,219 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-09-20 20:43:29,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 87 events. 2/87 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 100. Up to 10 conditions per place. [2022-09-20 20:43:29,220 INFO L137 encePairwiseOnDemand]: 94/97 looper letters, 10 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2022-09-20 20:43:29,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 83 transitions, 192 flow [2022-09-20 20:43:29,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 20:43:29,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 20:43:29,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2022-09-20 20:43:29,226 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8694158075601375 [2022-09-20 20:43:29,227 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 253 transitions. [2022-09-20 20:43:29,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 253 transitions. [2022-09-20 20:43:29,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:43:29,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 253 transitions. [2022-09-20 20:43:29,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:29,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:29,229 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:29,230 INFO L175 Difference]: Start difference. First operand has 81 places, 80 transitions, 162 flow. Second operand 3 states and 253 transitions. [2022-09-20 20:43:29,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 83 transitions, 192 flow [2022-09-20 20:43:29,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 83 transitions, 192 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 20:43:29,232 INFO L231 Difference]: Finished difference. Result has 84 places, 81 transitions, 174 flow [2022-09-20 20:43:29,232 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=84, PETRI_TRANSITIONS=81} [2022-09-20 20:43:29,233 INFO L287 CegarLoopForPetriNet]: 84 programPoint places, 0 predicate places. [2022-09-20 20:43:29,233 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 81 transitions, 174 flow [2022-09-20 20:43:29,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:29,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:43:29,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:43:29,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-20 20:43:29,234 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:43:29,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:43:29,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1409393791, now seen corresponding path program 1 times [2022-09-20 20:43:29,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:43:29,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059387629] [2022-09-20 20:43:29,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:43:29,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:43:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:43:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:43:29,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:43:29,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059387629] [2022-09-20 20:43:29,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059387629] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:43:29,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182288252] [2022-09-20 20:43:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:43:29,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:43:29,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:43:29,372 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 20:43:29,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-09-20 20:43:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:43:29,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2022-09-20 20:43:29,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:43:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 20:43:29,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 20:43:29,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182288252] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:43:29,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 20:43:29,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-09-20 20:43:29,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878599754] [2022-09-20 20:43:29,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:43:29,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 20:43:29,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:43:29,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 20:43:29,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-09-20 20:43:29,513 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 97 [2022-09-20 20:43:29,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 81 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:29,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:43:29,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 97 [2022-09-20 20:43:29,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:43:29,565 INFO L130 PetriNetUnfolder]: 2/97 cut-off events. [2022-09-20 20:43:29,565 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-20 20:43:29,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 97 events. 2/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 72 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 114. Up to 9 conditions per place. [2022-09-20 20:43:29,566 INFO L137 encePairwiseOnDemand]: 94/97 looper letters, 9 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2022-09-20 20:43:29,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 84 transitions, 202 flow [2022-09-20 20:43:29,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 20:43:29,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 20:43:29,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 255 transitions. [2022-09-20 20:43:29,568 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8762886597938144 [2022-09-20 20:43:29,568 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 255 transitions. [2022-09-20 20:43:29,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 255 transitions. [2022-09-20 20:43:29,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:43:29,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 255 transitions. [2022-09-20 20:43:29,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:29,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:29,571 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:29,571 INFO L175 Difference]: Start difference. First operand has 84 places, 81 transitions, 174 flow. Second operand 3 states and 255 transitions. [2022-09-20 20:43:29,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 84 transitions, 202 flow [2022-09-20 20:43:29,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 84 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 20:43:29,576 INFO L231 Difference]: Finished difference. Result has 86 places, 82 transitions, 184 flow [2022-09-20 20:43:29,576 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=86, PETRI_TRANSITIONS=82} [2022-09-20 20:43:29,577 INFO L287 CegarLoopForPetriNet]: 84 programPoint places, 2 predicate places. [2022-09-20 20:43:29,577 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 82 transitions, 184 flow [2022-09-20 20:43:29,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:29,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:43:29,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:43:29,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-09-20 20:43:29,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:43:29,779 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:43:29,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:43:29,779 INFO L85 PathProgramCache]: Analyzing trace with hash -293330369, now seen corresponding path program 1 times [2022-09-20 20:43:29,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:43:29,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393931247] [2022-09-20 20:43:29,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:43:29,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:43:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:43:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 20:43:29,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:43:29,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393931247] [2022-09-20 20:43:29,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393931247] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:43:29,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584352740] [2022-09-20 20:43:29,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:43:29,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:43:29,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:43:29,883 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 20:43:29,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-09-20 20:43:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:43:29,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-20 20:43:29,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:43:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 20:43:30,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:43:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 20:43:30,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584352740] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:43:30,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:43:30,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-09-20 20:43:30,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841754352] [2022-09-20 20:43:30,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:43:30,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-20 20:43:30,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:43:30,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-20 20:43:30,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-09-20 20:43:30,082 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 97 [2022-09-20 20:43:30,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 82 transitions, 184 flow. Second operand has 10 states, 10 states have (on average 81.9) internal successors, (819), 10 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:30,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:43:30,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 97 [2022-09-20 20:43:30,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:43:30,195 INFO L130 PetriNetUnfolder]: 2/110 cut-off events. [2022-09-20 20:43:30,195 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-09-20 20:43:30,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 110 events. 2/110 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 2/111 useless extension candidates. Maximal degree in co-relation 139. Up to 7 conditions per place. [2022-09-20 20:43:30,197 INFO L137 encePairwiseOnDemand]: 91/97 looper letters, 9 selfloop transitions, 9 changer transitions 0/90 dead transitions. [2022-09-20 20:43:30,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 90 transitions, 238 flow [2022-09-20 20:43:30,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-20 20:43:30,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-20 20:43:30,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 740 transitions. [2022-09-20 20:43:30,204 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.847651775486827 [2022-09-20 20:43:30,204 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 740 transitions. [2022-09-20 20:43:30,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 740 transitions. [2022-09-20 20:43:30,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:43:30,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 740 transitions. [2022-09-20 20:43:30,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 82.22222222222223) internal successors, (740), 9 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:30,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:30,215 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:30,215 INFO L175 Difference]: Start difference. First operand has 86 places, 82 transitions, 184 flow. Second operand 9 states and 740 transitions. [2022-09-20 20:43:30,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 90 transitions, 238 flow [2022-09-20 20:43:30,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 90 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 20:43:30,218 INFO L231 Difference]: Finished difference. Result has 96 places, 88 transitions, 232 flow [2022-09-20 20:43:30,219 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=232, PETRI_PLACES=96, PETRI_TRANSITIONS=88} [2022-09-20 20:43:30,219 INFO L287 CegarLoopForPetriNet]: 84 programPoint places, 12 predicate places. [2022-09-20 20:43:30,220 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 88 transitions, 232 flow [2022-09-20 20:43:30,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 81.9) internal successors, (819), 10 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:30,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:43:30,220 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:43:30,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-09-20 20:43:30,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-09-20 20:43:30,436 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:43:30,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:43:30,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1462430785, now seen corresponding path program 2 times [2022-09-20 20:43:30,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:43:30,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716025211] [2022-09-20 20:43:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:43:30,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:43:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:43:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-09-20 20:43:30,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:43:30,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716025211] [2022-09-20 20:43:30,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716025211] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:43:30,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171500865] [2022-09-20 20:43:30,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 20:43:30,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:43:30,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:43:30,508 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 20:43:30,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-09-20 20:43:30,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 20:43:30,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 20:43:30,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2022-09-20 20:43:30,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:43:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-09-20 20:43:30,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:43:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-09-20 20:43:30,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171500865] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:43:30,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:43:30,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-09-20 20:43:30,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175936111] [2022-09-20 20:43:30,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:43:30,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-20 20:43:30,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:43:30,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-20 20:43:30,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-09-20 20:43:30,670 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 97 [2022-09-20 20:43:30,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 88 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:30,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:43:30,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 97 [2022-09-20 20:43:30,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:43:30,747 INFO L130 PetriNetUnfolder]: 2/120 cut-off events. [2022-09-20 20:43:30,747 INFO L131 PetriNetUnfolder]: For 7/21 co-relation queries the response was YES. [2022-09-20 20:43:30,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 120 events. 2/120 cut-off events. For 7/21 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 71 event pairs, 0 based on Foata normal form. 9/128 useless extension candidates. Maximal degree in co-relation 170. Up to 8 conditions per place. [2022-09-20 20:43:30,749 INFO L137 encePairwiseOnDemand]: 91/97 looper letters, 10 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2022-09-20 20:43:30,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 96 transitions, 288 flow [2022-09-20 20:43:30,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-20 20:43:30,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-20 20:43:30,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 732 transitions. [2022-09-20 20:43:30,751 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8384879725085911 [2022-09-20 20:43:30,751 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 732 transitions. [2022-09-20 20:43:30,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 732 transitions. [2022-09-20 20:43:30,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:43:30,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 732 transitions. [2022-09-20 20:43:30,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.33333333333333) internal successors, (732), 9 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:30,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:30,755 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:30,756 INFO L175 Difference]: Start difference. First operand has 96 places, 88 transitions, 232 flow. Second operand 9 states and 732 transitions. [2022-09-20 20:43:30,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 96 transitions, 288 flow [2022-09-20 20:43:30,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 96 transitions, 282 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-09-20 20:43:30,759 INFO L231 Difference]: Finished difference. Result has 106 places, 94 transitions, 276 flow [2022-09-20 20:43:30,759 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=276, PETRI_PLACES=106, PETRI_TRANSITIONS=94} [2022-09-20 20:43:30,760 INFO L287 CegarLoopForPetriNet]: 84 programPoint places, 22 predicate places. [2022-09-20 20:43:30,760 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 94 transitions, 276 flow [2022-09-20 20:43:30,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:30,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:43:30,761 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:43:30,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-09-20 20:43:30,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:43:30,984 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:43:30,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:43:30,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1447238555, now seen corresponding path program 3 times [2022-09-20 20:43:30,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:43:30,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835313186] [2022-09-20 20:43:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:43:30,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:43:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:43:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-09-20 20:43:31,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:43:31,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835313186] [2022-09-20 20:43:31,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835313186] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:43:31,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590903619] [2022-09-20 20:43:31,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 20:43:31,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:43:31,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:43:31,116 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 20:43:31,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-09-20 20:43:31,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-09-20 20:43:31,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 20:43:31,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-20 20:43:31,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:43:31,309 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-09-20 20:43:31,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:43:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-09-20 20:43:31,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590903619] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:43:31,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:43:31,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-09-20 20:43:31,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120338876] [2022-09-20 20:43:31,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:43:31,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-20 20:43:31,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:43:31,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-20 20:43:31,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-09-20 20:43:31,417 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 97 [2022-09-20 20:43:31,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 94 transitions, 276 flow. Second operand has 18 states, 18 states have (on average 81.0) internal successors, (1458), 18 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:31,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:43:31,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 97 [2022-09-20 20:43:31,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:43:31,595 INFO L130 PetriNetUnfolder]: 2/152 cut-off events. [2022-09-20 20:43:31,595 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-09-20 20:43:31,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 152 events. 2/152 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 93 event pairs, 0 based on Foata normal form. 4/155 useless extension candidates. Maximal degree in co-relation 263. Up to 11 conditions per place. [2022-09-20 20:43:31,598 INFO L137 encePairwiseOnDemand]: 91/97 looper letters, 14 selfloop transitions, 21 changer transitions 0/112 dead transitions. [2022-09-20 20:43:31,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 112 transitions, 442 flow [2022-09-20 20:43:31,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-20 20:43:31,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-20 20:43:31,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1698 transitions. [2022-09-20 20:43:31,603 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.833578792341679 [2022-09-20 20:43:31,603 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1698 transitions. [2022-09-20 20:43:31,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1698 transitions. [2022-09-20 20:43:31,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:43:31,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1698 transitions. [2022-09-20 20:43:31,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 80.85714285714286) internal successors, (1698), 21 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:31,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 97.0) internal successors, (2134), 22 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:31,613 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 97.0) internal successors, (2134), 22 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:31,613 INFO L175 Difference]: Start difference. First operand has 106 places, 94 transitions, 276 flow. Second operand 21 states and 1698 transitions. [2022-09-20 20:43:31,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 112 transitions, 442 flow [2022-09-20 20:43:31,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 112 transitions, 428 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-09-20 20:43:31,618 INFO L231 Difference]: Finished difference. Result has 130 places, 107 transitions, 400 flow [2022-09-20 20:43:31,618 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=400, PETRI_PLACES=130, PETRI_TRANSITIONS=107} [2022-09-20 20:43:31,619 INFO L287 CegarLoopForPetriNet]: 84 programPoint places, 46 predicate places. [2022-09-20 20:43:31,619 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 107 transitions, 400 flow [2022-09-20 20:43:31,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 81.0) internal successors, (1458), 18 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:31,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:43:31,620 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:43:31,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-09-20 20:43:31,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:43:31,823 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:43:31,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:43:31,824 INFO L85 PathProgramCache]: Analyzing trace with hash -692690511, now seen corresponding path program 4 times [2022-09-20 20:43:31,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:43:31,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103063126] [2022-09-20 20:43:31,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:43:31,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:43:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:43:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-09-20 20:43:32,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:43:32,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103063126] [2022-09-20 20:43:32,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103063126] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:43:32,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51368355] [2022-09-20 20:43:32,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 20:43:32,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:43:32,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:43:32,054 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 20:43:32,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-09-20 20:43:32,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 20:43:32,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 20:43:32,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 16 conjunts are in the unsatisfiable core [2022-09-20 20:43:32,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:43:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-09-20 20:43:32,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:43:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-09-20 20:43:32,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51368355] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:43:32,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:43:32,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-09-20 20:43:32,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954147988] [2022-09-20 20:43:32,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:43:32,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-09-20 20:43:32,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:43:32,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-09-20 20:43:32,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-09-20 20:43:32,552 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 97 [2022-09-20 20:43:32,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 107 transitions, 400 flow. Second operand has 34 states, 34 states have (on average 81.0) internal successors, (2754), 34 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:32,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:43:32,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 97 [2022-09-20 20:43:32,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:43:33,090 INFO L130 PetriNetUnfolder]: 2/216 cut-off events. [2022-09-20 20:43:33,090 INFO L131 PetriNetUnfolder]: For 267/267 co-relation queries the response was YES. [2022-09-20 20:43:33,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 216 events. 2/216 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 93 event pairs, 0 based on Foata normal form. 8/223 useless extension candidates. Maximal degree in co-relation 485. Up to 27 conditions per place. [2022-09-20 20:43:33,093 INFO L137 encePairwiseOnDemand]: 91/97 looper letters, 22 selfloop transitions, 45 changer transitions 0/144 dead transitions. [2022-09-20 20:43:33,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 144 transitions, 822 flow [2022-09-20 20:43:33,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-09-20 20:43:33,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-09-20 20:43:33,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3630 transitions. [2022-09-20 20:43:33,100 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8316151202749141 [2022-09-20 20:43:33,101 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3630 transitions. [2022-09-20 20:43:33,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3630 transitions. [2022-09-20 20:43:33,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:43:33,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3630 transitions. [2022-09-20 20:43:33,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 80.66666666666667) internal successors, (3630), 45 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:33,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 97.0) internal successors, (4462), 46 states have internal predecessors, (4462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:33,116 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 97.0) internal successors, (4462), 46 states have internal predecessors, (4462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:33,116 INFO L175 Difference]: Start difference. First operand has 130 places, 107 transitions, 400 flow. Second operand 45 states and 3630 transitions. [2022-09-20 20:43:33,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 144 transitions, 822 flow [2022-09-20 20:43:33,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 144 transitions, 782 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-09-20 20:43:33,122 INFO L231 Difference]: Finished difference. Result has 177 places, 132 transitions, 678 flow [2022-09-20 20:43:33,122 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=678, PETRI_PLACES=177, PETRI_TRANSITIONS=132} [2022-09-20 20:43:33,122 INFO L287 CegarLoopForPetriNet]: 84 programPoint places, 93 predicate places. [2022-09-20 20:43:33,123 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 132 transitions, 678 flow [2022-09-20 20:43:33,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 81.0) internal successors, (2754), 34 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:33,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:43:33,124 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:43:33,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-09-20 20:43:33,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:43:33,341 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:43:33,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:43:33,342 INFO L85 PathProgramCache]: Analyzing trace with hash 166775881, now seen corresponding path program 5 times [2022-09-20 20:43:33,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:43:33,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208211287] [2022-09-20 20:43:33,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:43:33,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:43:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:43:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 0 proven. 855 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-09-20 20:43:33,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:43:33,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208211287] [2022-09-20 20:43:33,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208211287] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:43:33,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292773223] [2022-09-20 20:43:33,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 20:43:33,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:43:33,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:43:33,852 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 20:43:33,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-09-20 20:43:34,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-09-20 20:43:34,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 20:43:34,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-20 20:43:34,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:43:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2022-09-20 20:43:34,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:43:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2022-09-20 20:43:34,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292773223] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:43:34,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:43:34,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 9, 9] total 47 [2022-09-20 20:43:34,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539427611] [2022-09-20 20:43:34,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:43:34,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-09-20 20:43:34,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:43:34,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-09-20 20:43:34,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=1803, Unknown=0, NotChecked=0, Total=2162 [2022-09-20 20:43:34,366 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 97 [2022-09-20 20:43:34,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 132 transitions, 678 flow. Second operand has 47 states, 47 states have (on average 74.29787234042553) internal successors, (3492), 47 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:43:34,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:43:34,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 97 [2022-09-20 20:43:34,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:44:23,767 INFO L130 PetriNetUnfolder]: 2209/7059 cut-off events. [2022-09-20 20:44:23,768 INFO L131 PetriNetUnfolder]: For 20228/20228 co-relation queries the response was YES. [2022-09-20 20:44:23,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22935 conditions, 7059 events. 2209/7059 cut-off events. For 20228/20228 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 51065 event pairs, 20 based on Foata normal form. 308/7363 useless extension candidates. Maximal degree in co-relation 22910. Up to 928 conditions per place. [2022-09-20 20:44:23,842 INFO L137 encePairwiseOnDemand]: 86/97 looper letters, 961 selfloop transitions, 1927 changer transitions 0/2951 dead transitions. [2022-09-20 20:44:23,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1117 places, 2951 transitions, 26324 flow [2022-09-20 20:44:23,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 941 states. [2022-09-20 20:44:23,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 941 states. [2022-09-20 20:44:23,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 70848 transitions. [2022-09-20 20:44:23,945 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.776186772133177 [2022-09-20 20:44:23,945 INFO L72 ComplementDD]: Start complementDD. Operand 941 states and 70848 transitions. [2022-09-20 20:44:23,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 941 states and 70848 transitions. [2022-09-20 20:44:23,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:44:23,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 941 states and 70848 transitions. [2022-09-20 20:44:24,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 942 states, 941 states have (on average 75.29011689691818) internal successors, (70848), 941 states have internal predecessors, (70848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:44:24,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 942 states, 942 states have (on average 97.0) internal successors, (91374), 942 states have internal predecessors, (91374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:44:24,418 INFO L81 ComplementDD]: Finished complementDD. Result has 942 states, 942 states have (on average 97.0) internal successors, (91374), 942 states have internal predecessors, (91374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:44:24,419 INFO L175 Difference]: Start difference. First operand has 177 places, 132 transitions, 678 flow. Second operand 941 states and 70848 transitions. [2022-09-20 20:44:24,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1117 places, 2951 transitions, 26324 flow [2022-09-20 20:44:24,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1099 places, 2951 transitions, 25164 flow, removed 220 selfloop flow, removed 18 redundant places. [2022-09-20 20:44:24,512 INFO L231 Difference]: Finished difference. Result has 1379 places, 2119 transitions, 18814 flow [2022-09-20 20:44:24,513 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=941, PETRI_FLOW=18814, PETRI_PLACES=1379, PETRI_TRANSITIONS=2119} [2022-09-20 20:44:24,516 INFO L287 CegarLoopForPetriNet]: 84 programPoint places, 1295 predicate places. [2022-09-20 20:44:24,516 INFO L495 AbstractCegarLoop]: Abstraction has has 1379 places, 2119 transitions, 18814 flow [2022-09-20 20:44:24,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 74.29787234042553) internal successors, (3492), 47 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:44:24,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:44:24,517 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:44:24,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-09-20 20:44:24,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:44:24,732 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:44:24,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:44:24,733 INFO L85 PathProgramCache]: Analyzing trace with hash 396055486, now seen corresponding path program 6 times [2022-09-20 20:44:24,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:44:24,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033608362] [2022-09-20 20:44:24,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:44:24,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:44:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:44:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 0 proven. 976 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-09-20 20:44:25,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:44:25,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033608362] [2022-09-20 20:44:25,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033608362] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:44:25,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056387318] [2022-09-20 20:44:25,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 20:44:25,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:44:25,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:44:25,236 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 20:44:25,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-09-20 20:44:25,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-09-20 20:44:25,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 20:44:25,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 16 conjunts are in the unsatisfiable core [2022-09-20 20:44:25,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:44:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 31 proven. 238 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2022-09-20 20:44:25,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:44:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 31 proven. 238 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2022-09-20 20:44:26,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056387318] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:44:26,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:44:26,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 17, 17] total 65 [2022-09-20 20:44:26,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489589112] [2022-09-20 20:44:26,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:44:26,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-09-20 20:44:26,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:44:26,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-09-20 20:44:26,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=594, Invalid=3566, Unknown=0, NotChecked=0, Total=4160 [2022-09-20 20:44:26,264 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 97 [2022-09-20 20:44:26,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1379 places, 2119 transitions, 18814 flow. Second operand has 65 states, 65 states have (on average 74.23076923076923) internal successors, (4825), 65 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:44:26,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:44:26,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 97 [2022-09-20 20:44:26,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:48:55,154 INFO L130 PetriNetUnfolder]: 4673/15585 cut-off events. [2022-09-20 20:48:55,155 INFO L131 PetriNetUnfolder]: For 12494543/12494738 co-relation queries the response was YES. [2022-09-20 20:48:55,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93972 conditions, 15585 events. 4673/15585 cut-off events. For 12494543/12494738 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 129340 event pairs, 20 based on Foata normal form. 830/16409 useless extension candidates. Maximal degree in co-relation 93667. Up to 1984 conditions per place. [2022-09-20 20:48:55,619 INFO L137 encePairwiseOnDemand]: 86/97 looper letters, 1974 selfloop transitions, 4834 changer transitions 0/6871 dead transitions. [2022-09-20 20:48:55,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 3579 places, 6871 transitions, 125300 flow [2022-09-20 20:48:55,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2201 states. [2022-09-20 20:48:55,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2201 states. [2022-09-20 20:48:56,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 165332 transitions. [2022-09-20 20:48:56,236 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7743996402759757 [2022-09-20 20:48:56,237 INFO L72 ComplementDD]: Start complementDD. Operand 2201 states and 165332 transitions. [2022-09-20 20:48:56,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2201 states and 165332 transitions. [2022-09-20 20:48:56,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:48:56,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2201 states and 165332 transitions. [2022-09-20 20:48:56,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 2202 states, 2201 states have (on average 75.11676510676965) internal successors, (165332), 2201 states have internal predecessors, (165332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:48:57,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 2202 states, 2202 states have (on average 97.0) internal successors, (213594), 2202 states have internal predecessors, (213594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:48:57,110 INFO L81 ComplementDD]: Finished complementDD. Result has 2202 states, 2202 states have (on average 97.0) internal successors, (213594), 2202 states have internal predecessors, (213594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:48:57,111 INFO L175 Difference]: Start difference. First operand has 1379 places, 2119 transitions, 18814 flow. Second operand 2201 states and 165332 transitions. [2022-09-20 20:48:57,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 3579 places, 6871 transitions, 125300 flow [2022-09-20 20:49:05,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 3531 places, 6871 transitions, 118724 flow, removed 804 selfloop flow, removed 48 redundant places. [2022-09-20 20:49:05,950 INFO L231 Difference]: Finished difference. Result has 4086 places, 5079 transitions, 58746 flow [2022-09-20 20:49:05,953 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=15926, PETRI_DIFFERENCE_MINUEND_PLACES=1331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1974, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2201, PETRI_FLOW=58746, PETRI_PLACES=4086, PETRI_TRANSITIONS=5079} [2022-09-20 20:49:05,954 INFO L287 CegarLoopForPetriNet]: 84 programPoint places, 4002 predicate places. [2022-09-20 20:49:05,954 INFO L495 AbstractCegarLoop]: Abstraction has has 4086 places, 5079 transitions, 58746 flow [2022-09-20 20:49:05,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 74.23076923076923) internal successors, (4825), 65 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:49:05,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:49:05,955 INFO L208 CegarLoopForPetriNet]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:49:05,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-09-20 20:49:06,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:49:06,156 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:49:06,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:49:06,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1124259841, now seen corresponding path program 7 times [2022-09-20 20:49:06,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:49:06,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094351805] [2022-09-20 20:49:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:49:06,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:49:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:49:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 29 proven. 1105 refuted. 0 times theorem prover too weak. 1141 trivial. 0 not checked. [2022-09-20 20:49:06,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:49:06,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094351805] [2022-09-20 20:49:06,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094351805] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:49:06,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550030969] [2022-09-20 20:49:06,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 20:49:06,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:49:06,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:49:06,765 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 20:49:06,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-09-20 20:49:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:49:06,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 36 conjunts are in the unsatisfiable core [2022-09-20 20:49:06,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:49:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 29 proven. 1105 refuted. 0 times theorem prover too weak. 1141 trivial. 0 not checked. [2022-09-20 20:49:07,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:49:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 29 proven. 1105 refuted. 0 times theorem prover too weak. 1141 trivial. 0 not checked. [2022-09-20 20:49:08,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550030969] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:49:08,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:49:08,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 43 [2022-09-20 20:49:08,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136154784] [2022-09-20 20:49:08,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:49:08,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-09-20 20:49:08,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:49:08,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-09-20 20:49:08,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2022-09-20 20:49:08,073 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 97 [2022-09-20 20:49:08,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 4086 places, 5079 transitions, 58746 flow. Second operand has 43 states, 43 states have (on average 81.04651162790698) internal successors, (3485), 43 states have internal predecessors, (3485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:49:08,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:49:08,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 97 [2022-09-20 20:49:08,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:49:22,242 INFO L130 PetriNetUnfolder]: 3045/11993 cut-off events. [2022-09-20 20:49:22,242 INFO L131 PetriNetUnfolder]: For 3782441/3784772 co-relation queries the response was YES. [2022-09-20 20:49:22,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80898 conditions, 11993 events. 3045/11993 cut-off events. For 3782441/3784772 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 100885 event pairs, 133 based on Foata normal form. 313/12234 useless extension candidates. Maximal degree in co-relation 80038. Up to 1373 conditions per place. [2022-09-20 20:49:23,036 INFO L137 encePairwiseOnDemand]: 91/97 looper letters, 27 selfloop transitions, 2651 changer transitions 0/5142 dead transitions. [2022-09-20 20:49:23,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 4145 places, 5142 transitions, 65940 flow [2022-09-20 20:49:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-09-20 20:49:23,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-09-20 20:49:23,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4830 transitions. [2022-09-20 20:49:23,040 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8298969072164949 [2022-09-20 20:49:23,041 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4830 transitions. [2022-09-20 20:49:23,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4830 transitions. [2022-09-20 20:49:23,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:49:23,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4830 transitions. [2022-09-20 20:49:23,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 80.5) internal successors, (4830), 60 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:49:23,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 97.0) internal successors, (5917), 61 states have internal predecessors, (5917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:49:23,055 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 97.0) internal successors, (5917), 61 states have internal predecessors, (5917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:49:23,055 INFO L175 Difference]: Start difference. First operand has 4086 places, 5079 transitions, 58746 flow. Second operand 60 states and 4830 transitions. [2022-09-20 20:49:23,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 4145 places, 5142 transitions, 65940 flow [2022-09-20 20:50:30,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 3317 places, 5142 transitions, 57964 flow, removed 2314 selfloop flow, removed 828 redundant places. [2022-09-20 20:50:30,159 INFO L231 Difference]: Finished difference. Result has 3321 places, 5126 transitions, 57849 flow [2022-09-20 20:50:30,166 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=50770, PETRI_DIFFERENCE_MINUEND_PLACES=3258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5079, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2606, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=57849, PETRI_PLACES=3321, PETRI_TRANSITIONS=5126} [2022-09-20 20:50:30,167 INFO L287 CegarLoopForPetriNet]: 84 programPoint places, 3237 predicate places. [2022-09-20 20:50:30,167 INFO L495 AbstractCegarLoop]: Abstraction has has 3321 places, 5126 transitions, 57849 flow [2022-09-20 20:50:30,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 81.04651162790698) internal successors, (3485), 43 states have internal predecessors, (3485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:50:30,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:50:30,168 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:50:30,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-09-20 20:50:30,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-09-20 20:50:30,384 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:50:30,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:50:30,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1130646662, now seen corresponding path program 8 times [2022-09-20 20:50:30,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:50:30,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734330113] [2022-09-20 20:50:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:50:30,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:50:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:50:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 338 proven. 1170 refuted. 0 times theorem prover too weak. 1202 trivial. 0 not checked. [2022-09-20 20:50:30,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:50:30,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734330113] [2022-09-20 20:50:30,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734330113] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:50:30,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680800586] [2022-09-20 20:50:30,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 20:50:30,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:50:30,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:50:30,876 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 20:50:30,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-09-20 20:50:31,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 20:50:31,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 20:50:31,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 32 conjunts are in the unsatisfiable core [2022-09-20 20:50:31,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:50:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 338 proven. 1170 refuted. 0 times theorem prover too weak. 1202 trivial. 0 not checked. [2022-09-20 20:50:31,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:50:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 338 proven. 1170 refuted. 0 times theorem prover too weak. 1202 trivial. 0 not checked. [2022-09-20 20:50:31,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680800586] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:50:31,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:50:31,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 43 [2022-09-20 20:50:31,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696132647] [2022-09-20 20:50:31,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:50:31,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-09-20 20:50:31,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:50:31,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-09-20 20:50:31,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2022-09-20 20:50:31,830 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 97 [2022-09-20 20:50:31,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 3321 places, 5126 transitions, 57849 flow. Second operand has 43 states, 43 states have (on average 82.02325581395348) internal successors, (3527), 43 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:50:31,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:50:31,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 97 [2022-09-20 20:50:31,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:50:53,801 INFO L130 PetriNetUnfolder]: 4103/17142 cut-off events. [2022-09-20 20:50:53,801 INFO L131 PetriNetUnfolder]: For 18014013/18017152 co-relation queries the response was YES. [2022-09-20 20:50:54,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101146 conditions, 17142 events. 4103/17142 cut-off events. For 18014013/18017152 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 153073 event pairs, 194 based on Foata normal form. 174/17245 useless extension candidates. Maximal degree in co-relation 100282. Up to 1916 conditions per place. [2022-09-20 20:50:54,875 INFO L137 encePairwiseOnDemand]: 91/97 looper letters, 737 selfloop transitions, 3000 changer transitions 0/6460 dead transitions. [2022-09-20 20:50:54,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 3380 places, 6460 transitions, 79631 flow [2022-09-20 20:50:54,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-09-20 20:50:54,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-09-20 20:50:54,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4891 transitions. [2022-09-20 20:50:54,879 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8403780068728522 [2022-09-20 20:50:54,879 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4891 transitions. [2022-09-20 20:50:54,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4891 transitions. [2022-09-20 20:50:54,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:50:54,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4891 transitions. [2022-09-20 20:50:54,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 81.51666666666667) internal successors, (4891), 60 states have internal predecessors, (4891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:50:54,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 97.0) internal successors, (5917), 61 states have internal predecessors, (5917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:50:54,889 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 97.0) internal successors, (5917), 61 states have internal predecessors, (5917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:50:54,889 INFO L175 Difference]: Start difference. First operand has 3321 places, 5126 transitions, 57849 flow. Second operand 60 states and 4891 transitions. [2022-09-20 20:50:54,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 3380 places, 6460 transitions, 79631 flow [2022-09-20 20:52:17,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 3232 places, 6460 transitions, 73237 flow, removed 513 selfloop flow, removed 148 redundant places. [2022-09-20 20:52:17,147 INFO L231 Difference]: Finished difference. Result has 3238 places, 5926 transitions, 65675 flow [2022-09-20 20:52:17,154 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=51455, PETRI_DIFFERENCE_MINUEND_PLACES=3173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2776, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=65675, PETRI_PLACES=3238, PETRI_TRANSITIONS=5926} [2022-09-20 20:52:17,154 INFO L287 CegarLoopForPetriNet]: 84 programPoint places, 3154 predicate places. [2022-09-20 20:52:17,154 INFO L495 AbstractCegarLoop]: Abstraction has has 3238 places, 5926 transitions, 65675 flow [2022-09-20 20:52:17,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 82.02325581395348) internal successors, (3527), 43 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:52:17,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:52:17,155 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:52:17,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-09-20 20:52:17,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:52:17,379 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:52:17,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:52:17,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1887713738, now seen corresponding path program 9 times [2022-09-20 20:52:17,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:52:17,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878345631] [2022-09-20 20:52:17,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:52:17,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:52:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:52:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:52:19,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:52:19,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878345631] [2022-09-20 20:52:19,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878345631] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:52:19,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133763803] [2022-09-20 20:52:19,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 20:52:19,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:52:19,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:52:19,369 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 20:52:19,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-09-20 20:52:20,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-09-20 20:52:20,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 20:52:20,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 165 conjunts are in the unsatisfiable core [2022-09-20 20:52:20,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:52:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:52:21,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:52:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3650 backedges. 0 proven. 3650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:52:22,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133763803] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:52:22,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:52:22,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 68 [2022-09-20 20:52:22,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808275836] [2022-09-20 20:52:22,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:52:22,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-09-20 20:52:22,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:52:22,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-09-20 20:52:22,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2022-09-20 20:52:22,352 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 97 [2022-09-20 20:52:22,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 3238 places, 5926 transitions, 65675 flow. Second operand has 68 states, 68 states have (on average 76.36764705882354) internal successors, (5193), 68 states have internal predecessors, (5193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:52:22,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:52:22,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 97 [2022-09-20 20:52:22,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand