./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 07:48:52,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 07:48:52,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 07:48:52,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 07:48:52,051 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 07:48:52,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 07:48:52,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 07:48:52,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 07:48:52,061 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 07:48:52,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 07:48:52,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 07:48:52,069 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 07:48:52,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 07:48:52,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 07:48:52,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 07:48:52,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 07:48:52,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 07:48:52,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 07:48:52,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 07:48:52,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 07:48:52,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 07:48:52,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 07:48:52,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 07:48:52,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 07:48:52,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 07:48:52,096 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 07:48:52,096 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 07:48:52,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 07:48:52,098 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 07:48:52,099 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 07:48:52,100 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 07:48:52,101 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 07:48:52,102 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 07:48:52,103 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 07:48:52,104 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 07:48:52,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 07:48:52,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 07:48:52,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 07:48:52,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 07:48:52,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 07:48:52,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 07:48:52,108 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 07:48:52,143 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 07:48:52,143 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 07:48:52,145 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 07:48:52,145 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 07:48:52,146 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 07:48:52,146 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 07:48:52,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 07:48:52,147 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 07:48:52,147 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 07:48:52,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 07:48:52,148 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 07:48:52,148 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 07:48:52,148 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 07:48:52,149 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 07:48:52,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 07:48:52,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 07:48:52,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 07:48:52,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 07:48:52,150 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 07:48:52,150 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 07:48:52,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 07:48:52,150 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 07:48:52,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 07:48:52,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 07:48:52,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 07:48:52,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 07:48:52,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 07:48:52,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 07:48:52,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 07:48:52,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 07:48:52,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 07:48:52,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 07:48:52,153 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 07:48:52,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 07:48:52,153 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 07:48:52,153 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 07:48:52,153 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 07:48:52,154 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 07:48:52,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 07:48:52,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 07:48:52,491 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 07:48:52,492 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 07:48:52,492 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 07:48:52,493 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c [2023-09-01 07:48:53,737 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 07:48:53,957 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 07:48:53,961 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c [2023-09-01 07:48:53,966 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e90024cd2/ab1dca60f6d34756bdbdcc45f0131961/FLAG7f0c4e1ce [2023-09-01 07:48:53,978 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e90024cd2/ab1dca60f6d34756bdbdcc45f0131961 [2023-09-01 07:48:53,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 07:48:53,981 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 07:48:53,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 07:48:53,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 07:48:53,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 07:48:53,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 07:48:53" (1/1) ... [2023-09-01 07:48:53,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7862c0b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:48:53, skipping insertion in model container [2023-09-01 07:48:53,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 07:48:53" (1/1) ... [2023-09-01 07:48:53,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 07:48:54,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 07:48:54,186 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c[2950,2963] [2023-09-01 07:48:54,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 07:48:54,202 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 07:48:54,236 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c[2950,2963] [2023-09-01 07:48:54,237 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 07:48:54,247 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 07:48:54,247 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 07:48:54,253 INFO L208 MainTranslator]: Completed translation [2023-09-01 07:48:54,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:48:54 WrapperNode [2023-09-01 07:48:54,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 07:48:54,255 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 07:48:54,255 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 07:48:54,255 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 07:48:54,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:48:54" (1/1) ... [2023-09-01 07:48:54,275 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:48:54" (1/1) ... [2023-09-01 07:48:54,301 INFO L138 Inliner]: procedures = 22, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2023-09-01 07:48:54,302 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 07:48:54,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 07:48:54,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 07:48:54,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 07:48:54,312 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:48:54" (1/1) ... [2023-09-01 07:48:54,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:48:54" (1/1) ... [2023-09-01 07:48:54,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:48:54" (1/1) ... [2023-09-01 07:48:54,327 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:48:54" (1/1) ... [2023-09-01 07:48:54,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:48:54" (1/1) ... [2023-09-01 07:48:54,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:48:54" (1/1) ... [2023-09-01 07:48:54,343 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:48:54" (1/1) ... [2023-09-01 07:48:54,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:48:54" (1/1) ... [2023-09-01 07:48:54,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 07:48:54,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 07:48:54,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 07:48:54,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 07:48:54,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:48:54" (1/1) ... [2023-09-01 07:48:54,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 07:48:54,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:48:54,386 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) [2023-09-01 07:48:54,413 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 [2023-09-01 07:48:54,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 07:48:54,431 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 07:48:54,431 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 07:48:54,431 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 07:48:54,432 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 07:48:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 07:48:54,432 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 07:48:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 07:48:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 07:48:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 07:48:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 07:48:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 07:48:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 07:48:54,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 07:48:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 07:48:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 07:48:54,435 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 07:48:54,560 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 07:48:54,562 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 07:48:54,837 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 07:48:54,884 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 07:48:54,884 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 07:48:54,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 07:48:54 BoogieIcfgContainer [2023-09-01 07:48:54,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 07:48:54,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 07:48:54,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 07:48:54,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 07:48:54,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 07:48:53" (1/3) ... [2023-09-01 07:48:54,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5450a149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 07:48:54, skipping insertion in model container [2023-09-01 07:48:54,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:48:54" (2/3) ... [2023-09-01 07:48:54,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5450a149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 07:48:54, skipping insertion in model container [2023-09-01 07:48:54,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 07:48:54" (3/3) ... [2023-09-01 07:48:54,894 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-4.wvr.c [2023-09-01 07:48:54,901 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 07:48:54,909 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 07:48:54,909 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-09-01 07:48:54,909 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 07:48:54,975 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 07:48:55,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 110 transitions, 244 flow [2023-09-01 07:48:55,070 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2023-09-01 07:48:55,072 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 07:48:55,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 107 events. 7/107 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 114 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 86. Up to 2 conditions per place. [2023-09-01 07:48:55,078 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 110 transitions, 244 flow [2023-09-01 07:48:55,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 92 transitions, 196 flow [2023-09-01 07:48:55,086 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 07:48:55,099 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 92 transitions, 196 flow [2023-09-01 07:48:55,101 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 92 transitions, 196 flow [2023-09-01 07:48:55,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 92 transitions, 196 flow [2023-09-01 07:48:55,131 INFO L130 PetriNetUnfolder]: 7/92 cut-off events. [2023-09-01 07:48:55,131 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 07:48:55,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 92 events. 7/92 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 113 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 86. Up to 2 conditions per place. [2023-09-01 07:48:55,133 INFO L119 LiptonReduction]: Number of co-enabled transitions 1604 [2023-09-01 07:48:58,180 INFO L134 LiptonReduction]: Checked pairs total: 1874 [2023-09-01 07:48:58,180 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-09-01 07:48:58,205 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 07:48:58,213 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=true, 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;@451a008c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 07:48:58,213 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-09-01 07:48:58,219 INFO L130 PetriNetUnfolder]: 0/4 cut-off events. [2023-09-01 07:48:58,220 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 07:48:58,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:48:58,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 07:48:58,222 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-09-01 07:48:58,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:48:58,228 INFO L85 PathProgramCache]: Analyzing trace with hash 13360126, now seen corresponding path program 1 times [2023-09-01 07:48:58,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:48:58,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054103359] [2023-09-01 07:48:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:48:58,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:48:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:48:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:48:58,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:48:58,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054103359] [2023-09-01 07:48:58,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054103359] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:48:58,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:48:58,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 07:48:58,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152457138] [2023-09-01 07:48:58,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:48:58,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:48:58,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:48:58,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:48:58,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 07:48:58,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 197 [2023-09-01 07:48:58,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:48:58,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:48:58,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 197 [2023-09-01 07:48:58,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:48:59,007 INFO L130 PetriNetUnfolder]: 1323/1787 cut-off events. [2023-09-01 07:48:59,008 INFO L131 PetriNetUnfolder]: For 118/118 co-relation queries the response was YES. [2023-09-01 07:48:59,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3750 conditions, 1787 events. 1323/1787 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 7192 event pairs, 231 based on Foata normal form. 0/806 useless extension candidates. Maximal degree in co-relation 3479. Up to 1713 conditions per place. [2023-09-01 07:48:59,026 INFO L137 encePairwiseOnDemand]: 186/197 looper letters, 33 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2023-09-01 07:48:59,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 38 transitions, 169 flow [2023-09-01 07:48:59,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:48:59,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:48:59,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2023-09-01 07:48:59,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5109983079526227 [2023-09-01 07:48:59,047 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2023-09-01 07:48:59,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2023-09-01 07:48:59,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:48:59,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2023-09-01 07:48:59,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:48:59,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:48:59,065 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:48:59,066 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 64 flow. Second operand 3 states and 302 transitions. [2023-09-01 07:48:59,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 38 transitions, 169 flow [2023-09-01 07:48:59,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 38 transitions, 159 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 07:48:59,074 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 91 flow [2023-09-01 07:48:59,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-09-01 07:48:59,082 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2023-09-01 07:48:59,083 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 91 flow [2023-09-01 07:48:59,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:48:59,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:48:59,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 07:48:59,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 07:48:59,089 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-09-01 07:48:59,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:48:59,090 INFO L85 PathProgramCache]: Analyzing trace with hash -45806983, now seen corresponding path program 1 times [2023-09-01 07:48:59,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:48:59,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177287425] [2023-09-01 07:48:59,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:48:59,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:48:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:48:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:48:59,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:48:59,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177287425] [2023-09-01 07:48:59,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177287425] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:48:59,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:48:59,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 07:48:59,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648852700] [2023-09-01 07:48:59,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:48:59,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:48:59,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:48:59,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:48:59,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 07:48:59,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 197 [2023-09-01 07:48:59,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:48:59,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:48:59,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 197 [2023-09-01 07:48:59,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:48:59,369 INFO L130 PetriNetUnfolder]: 993/1361 cut-off events. [2023-09-01 07:48:59,370 INFO L131 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2023-09-01 07:48:59,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3564 conditions, 1361 events. 993/1361 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 5659 event pairs, 539 based on Foata normal form. 0/864 useless extension candidates. Maximal degree in co-relation 2011. Up to 1357 conditions per place. [2023-09-01 07:48:59,379 INFO L137 encePairwiseOnDemand]: 194/197 looper letters, 23 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-09-01 07:48:59,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 26 transitions, 131 flow [2023-09-01 07:48:59,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:48:59,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:48:59,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2023-09-01 07:48:59,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47715736040609136 [2023-09-01 07:48:59,382 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2023-09-01 07:48:59,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2023-09-01 07:48:59,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:48:59,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2023-09-01 07:48:59,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:48:59,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:48:59,385 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:48:59,385 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 91 flow. Second operand 3 states and 282 transitions. [2023-09-01 07:48:59,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 26 transitions, 131 flow [2023-09-01 07:48:59,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 128 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 07:48:59,387 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 82 flow [2023-09-01 07:48:59,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-09-01 07:48:59,388 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2023-09-01 07:48:59,388 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 82 flow [2023-09-01 07:48:59,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:48:59,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:48:59,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 07:48:59,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 07:48:59,389 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-09-01 07:48:59,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:48:59,390 INFO L85 PathProgramCache]: Analyzing trace with hash -45806981, now seen corresponding path program 1 times [2023-09-01 07:48:59,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:48:59,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117788380] [2023-09-01 07:48:59,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:48:59,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:48:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:48:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:48:59,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:48:59,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117788380] [2023-09-01 07:48:59,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117788380] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:48:59,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641426531] [2023-09-01 07:48:59,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:48:59,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:48:59,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:48:59,549 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) [2023-09-01 07:48:59,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 07:48:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:48:59,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 07:48:59,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:48:59,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:48:59,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:49:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:00,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641426531] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:49:00,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:49:00,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-09-01 07:49:00,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858450963] [2023-09-01 07:49:00,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:49:00,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 07:49:00,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:49:00,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 07:49:00,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-09-01 07:49:00,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 197 [2023-09-01 07:49:00,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 82 flow. Second operand has 8 states, 8 states have (on average 83.875) internal successors, (671), 8 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:00,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:49:00,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 197 [2023-09-01 07:49:00,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:49:00,592 INFO L130 PetriNetUnfolder]: 2165/3031 cut-off events. [2023-09-01 07:49:00,593 INFO L131 PetriNetUnfolder]: For 158/158 co-relation queries the response was YES. [2023-09-01 07:49:00,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7754 conditions, 3031 events. 2165/3031 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 13315 event pairs, 35 based on Foata normal form. 0/2053 useless extension candidates. Maximal degree in co-relation 7746. Up to 1415 conditions per place. [2023-09-01 07:49:00,611 INFO L137 encePairwiseOnDemand]: 187/197 looper letters, 87 selfloop transitions, 28 changer transitions 0/117 dead transitions. [2023-09-01 07:49:00,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 117 transitions, 575 flow [2023-09-01 07:49:00,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 07:49:00,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 07:49:00,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 781 transitions. [2023-09-01 07:49:00,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49555837563451777 [2023-09-01 07:49:00,614 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 781 transitions. [2023-09-01 07:49:00,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 781 transitions. [2023-09-01 07:49:00,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:49:00,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 781 transitions. [2023-09-01 07:49:00,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.625) internal successors, (781), 8 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:00,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:00,620 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:00,620 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 82 flow. Second operand 8 states and 781 transitions. [2023-09-01 07:49:00,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 117 transitions, 575 flow [2023-09-01 07:49:00,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 117 transitions, 574 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 07:49:00,623 INFO L231 Difference]: Finished difference. Result has 41 places, 50 transitions, 280 flow [2023-09-01 07:49:00,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=280, PETRI_PLACES=41, PETRI_TRANSITIONS=50} [2023-09-01 07:49:00,624 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-09-01 07:49:00,624 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 50 transitions, 280 flow [2023-09-01 07:49:00,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 83.875) internal successors, (671), 8 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:00,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:49:00,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:49:00,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 07:49:00,833 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 [2023-09-01 07:49:00,834 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-09-01 07:49:00,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:49:00,834 INFO L85 PathProgramCache]: Analyzing trace with hash -2094255097, now seen corresponding path program 1 times [2023-09-01 07:49:00,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:49:00,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303086289] [2023-09-01 07:49:00,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:49:00,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:49:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:49:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:01,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:49:01,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303086289] [2023-09-01 07:49:01,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303086289] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:49:01,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:49:01,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 07:49:01,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449473381] [2023-09-01 07:49:01,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:49:01,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 07:49:01,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:49:01,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 07:49:01,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 07:49:01,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-09-01 07:49:01,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 50 transitions, 280 flow. Second operand has 4 states, 4 states have (on average 77.5) internal successors, (310), 4 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:01,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:49:01,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-09-01 07:49:01,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:49:01,517 INFO L130 PetriNetUnfolder]: 2149/3089 cut-off events. [2023-09-01 07:49:01,517 INFO L131 PetriNetUnfolder]: For 2478/2478 co-relation queries the response was YES. [2023-09-01 07:49:01,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9838 conditions, 3089 events. 2149/3089 cut-off events. For 2478/2478 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 14213 event pairs, 63 based on Foata normal form. 76/2771 useless extension candidates. Maximal degree in co-relation 9826. Up to 2305 conditions per place. [2023-09-01 07:49:01,538 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 63 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2023-09-01 07:49:01,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 77 transitions, 517 flow [2023-09-01 07:49:01,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 07:49:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 07:49:01,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 358 transitions. [2023-09-01 07:49:01,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543147208121827 [2023-09-01 07:49:01,541 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 358 transitions. [2023-09-01 07:49:01,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 358 transitions. [2023-09-01 07:49:01,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:49:01,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 358 transitions. [2023-09-01 07:49:01,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:01,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:01,544 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:01,544 INFO L175 Difference]: Start difference. First operand has 41 places, 50 transitions, 280 flow. Second operand 4 states and 358 transitions. [2023-09-01 07:49:01,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 77 transitions, 517 flow [2023-09-01 07:49:01,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 77 transitions, 498 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-09-01 07:49:01,552 INFO L231 Difference]: Finished difference. Result has 45 places, 54 transitions, 360 flow [2023-09-01 07:49:01,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=360, PETRI_PLACES=45, PETRI_TRANSITIONS=54} [2023-09-01 07:49:01,553 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 11 predicate places. [2023-09-01 07:49:01,553 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 54 transitions, 360 flow [2023-09-01 07:49:01,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.5) internal successors, (310), 4 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:01,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:49:01,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:49:01,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 07:49:01,554 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-09-01 07:49:01,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:49:01,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2094252108, now seen corresponding path program 1 times [2023-09-01 07:49:01,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:49:01,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090395460] [2023-09-01 07:49:01,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:49:01,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:49:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:49:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:01,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:49:01,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090395460] [2023-09-01 07:49:01,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090395460] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:49:01,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800949668] [2023-09-01 07:49:01,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:49:01,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:49:01,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:49:01,706 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) [2023-09-01 07:49:01,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 07:49:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:49:01,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 07:49:01,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:49:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:02,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:49:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:02,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800949668] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:49:02,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:49:02,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-09-01 07:49:02,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785694829] [2023-09-01 07:49:02,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:49:02,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 07:49:02,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:49:02,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 07:49:02,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-09-01 07:49:02,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 197 [2023-09-01 07:49:02,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 54 transitions, 360 flow. Second operand has 8 states, 8 states have (on average 84.625) internal successors, (677), 8 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:02,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:49:02,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 197 [2023-09-01 07:49:02,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:49:02,802 INFO L130 PetriNetUnfolder]: 2697/3791 cut-off events. [2023-09-01 07:49:02,803 INFO L131 PetriNetUnfolder]: For 7118/7118 co-relation queries the response was YES. [2023-09-01 07:49:02,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12919 conditions, 3791 events. 2697/3791 cut-off events. For 7118/7118 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 17168 event pairs, 41 based on Foata normal form. 180/3519 useless extension candidates. Maximal degree in co-relation 12904. Up to 1477 conditions per place. [2023-09-01 07:49:02,840 INFO L137 encePairwiseOnDemand]: 187/197 looper letters, 86 selfloop transitions, 55 changer transitions 0/143 dead transitions. [2023-09-01 07:49:02,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 143 transitions, 1023 flow [2023-09-01 07:49:02,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 07:49:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 07:49:02,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 768 transitions. [2023-09-01 07:49:02,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4873096446700508 [2023-09-01 07:49:02,843 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 768 transitions. [2023-09-01 07:49:02,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 768 transitions. [2023-09-01 07:49:02,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:49:02,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 768 transitions. [2023-09-01 07:49:02,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.0) internal successors, (768), 8 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:02,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:02,853 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 197.0) internal successors, (1773), 9 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:02,853 INFO L175 Difference]: Start difference. First operand has 45 places, 54 transitions, 360 flow. Second operand 8 states and 768 transitions. [2023-09-01 07:49:02,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 143 transitions, 1023 flow [2023-09-01 07:49:02,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 143 transitions, 988 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-09-01 07:49:02,885 INFO L231 Difference]: Finished difference. Result has 53 places, 82 transitions, 716 flow [2023-09-01 07:49:02,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=716, PETRI_PLACES=53, PETRI_TRANSITIONS=82} [2023-09-01 07:49:02,887 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 19 predicate places. [2023-09-01 07:49:02,890 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 82 transitions, 716 flow [2023-09-01 07:49:02,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 84.625) internal successors, (677), 8 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:02,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:49:02,891 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-09-01 07:49:02,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 07:49:03,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:49:03,103 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-09-01 07:49:03,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:49:03,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1070822922, now seen corresponding path program 1 times [2023-09-01 07:49:03,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:49:03,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954093834] [2023-09-01 07:49:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:49:03,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:49:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:49:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:03,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:49:03,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954093834] [2023-09-01 07:49:03,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954093834] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:49:03,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111870388] [2023-09-01 07:49:03,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:49:03,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:49:03,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:49:03,302 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) [2023-09-01 07:49:03,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 07:49:03,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:49:03,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 07:49:03,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:49:03,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:03,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:49:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:03,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111870388] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:49:03,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:49:03,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2023-09-01 07:49:03,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792911670] [2023-09-01 07:49:03,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:49:03,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 07:49:03,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:49:03,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 07:49:03,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2023-09-01 07:49:03,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 197 [2023-09-01 07:49:03,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 82 transitions, 716 flow. Second operand has 12 states, 12 states have (on average 82.75) internal successors, (993), 12 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:03,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:49:03,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 197 [2023-09-01 07:49:03,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:49:04,720 INFO L130 PetriNetUnfolder]: 3007/4487 cut-off events. [2023-09-01 07:49:04,721 INFO L131 PetriNetUnfolder]: For 14638/14638 co-relation queries the response was YES. [2023-09-01 07:49:04,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16334 conditions, 4487 events. 3007/4487 cut-off events. For 14638/14638 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 23097 event pairs, 65 based on Foata normal form. 446/4931 useless extension candidates. Maximal degree in co-relation 16316. Up to 1279 conditions per place. [2023-09-01 07:49:04,751 INFO L137 encePairwiseOnDemand]: 187/197 looper letters, 139 selfloop transitions, 69 changer transitions 0/210 dead transitions. [2023-09-01 07:49:04,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 210 transitions, 1548 flow [2023-09-01 07:49:04,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 07:49:04,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 07:49:04,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1490 transitions. [2023-09-01 07:49:04,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727157360406091 [2023-09-01 07:49:04,756 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1490 transitions. [2023-09-01 07:49:04,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1490 transitions. [2023-09-01 07:49:04,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:49:04,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1490 transitions. [2023-09-01 07:49:04,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 93.125) internal successors, (1490), 16 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:04,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 197.0) internal successors, (3349), 17 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:04,765 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 197.0) internal successors, (3349), 17 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:04,765 INFO L175 Difference]: Start difference. First operand has 53 places, 82 transitions, 716 flow. Second operand 16 states and 1490 transitions. [2023-09-01 07:49:04,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 210 transitions, 1548 flow [2023-09-01 07:49:04,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 210 transitions, 1406 flow, removed 42 selfloop flow, removed 5 redundant places. [2023-09-01 07:49:04,855 INFO L231 Difference]: Finished difference. Result has 67 places, 96 transitions, 939 flow [2023-09-01 07:49:04,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=939, PETRI_PLACES=67, PETRI_TRANSITIONS=96} [2023-09-01 07:49:04,857 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 33 predicate places. [2023-09-01 07:49:04,858 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 96 transitions, 939 flow [2023-09-01 07:49:04,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 82.75) internal successors, (993), 12 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:04,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:49:04,859 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:49:04,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 07:49:05,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:49:05,065 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-09-01 07:49:05,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:49:05,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1763394028, now seen corresponding path program 1 times [2023-09-01 07:49:05,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:49:05,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722905470] [2023-09-01 07:49:05,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:49:05,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:49:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:49:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:05,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:49:05,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722905470] [2023-09-01 07:49:05,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722905470] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:49:05,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418990959] [2023-09-01 07:49:05,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:49:05,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:49:05,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:49:05,405 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) [2023-09-01 07:49:05,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 07:49:05,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:49:05,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 07:49:05,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:49:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:05,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:49:05,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:05,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418990959] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:49:05,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:49:05,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2023-09-01 07:49:05,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602640744] [2023-09-01 07:49:05,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:49:05,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 07:49:05,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:49:05,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 07:49:05,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-09-01 07:49:06,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 197 [2023-09-01 07:49:06,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 96 transitions, 939 flow. Second operand has 12 states, 12 states have (on average 75.0) internal successors, (900), 12 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:06,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:49:06,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 197 [2023-09-01 07:49:06,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:49:07,303 INFO L130 PetriNetUnfolder]: 3953/5917 cut-off events. [2023-09-01 07:49:07,304 INFO L131 PetriNetUnfolder]: For 24924/24924 co-relation queries the response was YES. [2023-09-01 07:49:07,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24165 conditions, 5917 events. 3953/5917 cut-off events. For 24924/24924 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 31928 event pairs, 313 based on Foata normal form. 100/6009 useless extension candidates. Maximal degree in co-relation 24142. Up to 3417 conditions per place. [2023-09-01 07:49:07,354 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 179 selfloop transitions, 79 changer transitions 0/260 dead transitions. [2023-09-01 07:49:07,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 260 transitions, 2425 flow [2023-09-01 07:49:07,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 07:49:07,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 07:49:07,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1194 transitions. [2023-09-01 07:49:07,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43292240754169686 [2023-09-01 07:49:07,359 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1194 transitions. [2023-09-01 07:49:07,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1194 transitions. [2023-09-01 07:49:07,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:49:07,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1194 transitions. [2023-09-01 07:49:07,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 85.28571428571429) internal successors, (1194), 14 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:07,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 197.0) internal successors, (2955), 15 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:07,369 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 197.0) internal successors, (2955), 15 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:07,369 INFO L175 Difference]: Start difference. First operand has 67 places, 96 transitions, 939 flow. Second operand 14 states and 1194 transitions. [2023-09-01 07:49:07,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 260 transitions, 2425 flow [2023-09-01 07:49:07,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 260 transitions, 2317 flow, removed 50 selfloop flow, removed 3 redundant places. [2023-09-01 07:49:07,418 INFO L231 Difference]: Finished difference. Result has 88 places, 155 transitions, 1864 flow [2023-09-01 07:49:07,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1864, PETRI_PLACES=88, PETRI_TRANSITIONS=155} [2023-09-01 07:49:07,418 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 54 predicate places. [2023-09-01 07:49:07,419 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 155 transitions, 1864 flow [2023-09-01 07:49:07,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 75.0) internal successors, (900), 12 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:07,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:49:07,419 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1] [2023-09-01 07:49:07,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 07:49:07,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:49:07,621 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-09-01 07:49:07,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:49:07,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1731336819, now seen corresponding path program 2 times [2023-09-01 07:49:07,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:49:07,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736416034] [2023-09-01 07:49:07,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:49:07,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:49:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:49:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 07:49:07,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:49:07,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736416034] [2023-09-01 07:49:07,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736416034] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:49:07,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104281806] [2023-09-01 07:49:07,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 07:49:07,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:49:07,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:49:07,864 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) [2023-09-01 07:49:07,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 07:49:07,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 07:49:07,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:49:07,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 07:49:07,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:49:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:08,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:49:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:08,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104281806] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:49:08,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:49:08,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-09-01 07:49:08,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623283769] [2023-09-01 07:49:08,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:49:08,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 07:49:08,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:49:08,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 07:49:08,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-09-01 07:49:08,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 197 [2023-09-01 07:49:08,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 155 transitions, 1864 flow. Second operand has 14 states, 14 states have (on average 82.92857142857143) internal successors, (1161), 14 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:08,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:49:08,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 197 [2023-09-01 07:49:08,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:49:10,105 INFO L130 PetriNetUnfolder]: 5437/8197 cut-off events. [2023-09-01 07:49:10,105 INFO L131 PetriNetUnfolder]: For 59174/59174 co-relation queries the response was YES. [2023-09-01 07:49:10,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36940 conditions, 8197 events. 5437/8197 cut-off events. For 59174/59174 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 46728 event pairs, 179 based on Foata normal form. 558/8753 useless extension candidates. Maximal degree in co-relation 36906. Up to 1464 conditions per place. [2023-09-01 07:49:10,201 INFO L137 encePairwiseOnDemand]: 189/197 looper letters, 193 selfloop transitions, 161 changer transitions 7/363 dead transitions. [2023-09-01 07:49:10,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 363 transitions, 3993 flow [2023-09-01 07:49:10,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 07:49:10,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 07:49:10,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1580 transitions. [2023-09-01 07:49:10,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47178262167811286 [2023-09-01 07:49:10,207 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1580 transitions. [2023-09-01 07:49:10,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1580 transitions. [2023-09-01 07:49:10,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:49:10,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1580 transitions. [2023-09-01 07:49:10,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 92.94117647058823) internal successors, (1580), 17 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:10,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 197.0) internal successors, (3546), 18 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:10,218 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 197.0) internal successors, (3546), 18 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:10,218 INFO L175 Difference]: Start difference. First operand has 88 places, 155 transitions, 1864 flow. Second operand 17 states and 1580 transitions. [2023-09-01 07:49:10,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 363 transitions, 3993 flow [2023-09-01 07:49:10,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 363 transitions, 3675 flow, removed 139 selfloop flow, removed 3 redundant places. [2023-09-01 07:49:10,497 INFO L231 Difference]: Finished difference. Result has 107 places, 216 transitions, 2983 flow [2023-09-01 07:49:10,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2983, PETRI_PLACES=107, PETRI_TRANSITIONS=216} [2023-09-01 07:49:10,499 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 73 predicate places. [2023-09-01 07:49:10,499 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 216 transitions, 2983 flow [2023-09-01 07:49:10,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.92857142857143) internal successors, (1161), 14 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:10,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:49:10,500 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:49:10,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 07:49:10,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:49:10,706 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-09-01 07:49:10,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:49:10,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1474241966, now seen corresponding path program 1 times [2023-09-01 07:49:10,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:49:10,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263854192] [2023-09-01 07:49:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:49:10,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:49:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:49:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:10,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:49:10,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263854192] [2023-09-01 07:49:10,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263854192] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:49:10,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892336804] [2023-09-01 07:49:10,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:49:10,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:49:10,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:49:10,938 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) [2023-09-01 07:49:10,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 07:49:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:49:11,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 07:49:11,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:49:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:11,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:49:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:11,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892336804] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:49:11,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:49:11,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2023-09-01 07:49:11,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709600723] [2023-09-01 07:49:11,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:49:11,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 07:49:11,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:49:11,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 07:49:11,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2023-09-01 07:49:11,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-09-01 07:49:11,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 216 transitions, 2983 flow. Second operand has 19 states, 19 states have (on average 77.57894736842105) internal successors, (1474), 19 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:11,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:49:11,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-09-01 07:49:11,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:49:15,016 INFO L130 PetriNetUnfolder]: 9901/14819 cut-off events. [2023-09-01 07:49:15,016 INFO L131 PetriNetUnfolder]: For 150170/150170 co-relation queries the response was YES. [2023-09-01 07:49:15,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72758 conditions, 14819 events. 9901/14819 cut-off events. For 150170/150170 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 90561 event pairs, 127 based on Foata normal form. 954/15771 useless extension candidates. Maximal degree in co-relation 72718. Up to 2715 conditions per place. [2023-09-01 07:49:15,137 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 307 selfloop transitions, 412 changer transitions 10/731 dead transitions. [2023-09-01 07:49:15,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 731 transitions, 9035 flow [2023-09-01 07:49:15,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 07:49:15,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 07:49:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3011 transitions. [2023-09-01 07:49:15,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44953717527620185 [2023-09-01 07:49:15,149 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3011 transitions. [2023-09-01 07:49:15,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3011 transitions. [2023-09-01 07:49:15,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:49:15,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3011 transitions. [2023-09-01 07:49:15,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 88.55882352941177) internal successors, (3011), 34 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:15,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 197.0) internal successors, (6895), 35 states have internal predecessors, (6895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:15,170 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 197.0) internal successors, (6895), 35 states have internal predecessors, (6895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:15,171 INFO L175 Difference]: Start difference. First operand has 107 places, 216 transitions, 2983 flow. Second operand 34 states and 3011 transitions. [2023-09-01 07:49:15,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 731 transitions, 9035 flow [2023-09-01 07:49:15,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 731 transitions, 8315 flow, removed 243 selfloop flow, removed 8 redundant places. [2023-09-01 07:49:15,968 INFO L231 Difference]: Finished difference. Result has 143 places, 466 transitions, 7293 flow [2023-09-01 07:49:15,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=2408, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=7293, PETRI_PLACES=143, PETRI_TRANSITIONS=466} [2023-09-01 07:49:15,970 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 109 predicate places. [2023-09-01 07:49:15,970 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 466 transitions, 7293 flow [2023-09-01 07:49:15,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 77.57894736842105) internal successors, (1474), 19 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:15,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:49:15,971 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:49:15,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 07:49:16,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:49:16,175 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-09-01 07:49:16,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:49:16,175 INFO L85 PathProgramCache]: Analyzing trace with hash -350204012, now seen corresponding path program 1 times [2023-09-01 07:49:16,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:49:16,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588434633] [2023-09-01 07:49:16,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:49:16,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:49:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:49:16,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:16,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:49:16,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588434633] [2023-09-01 07:49:16,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588434633] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:49:16,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49565040] [2023-09-01 07:49:16,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:49:16,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:49:16,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:49:16,453 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) [2023-09-01 07:49:16,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 07:49:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:49:16,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 07:49:16,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:49:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:16,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:49:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:16,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49565040] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:49:16,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:49:16,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 14 [2023-09-01 07:49:16,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536900370] [2023-09-01 07:49:16,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:49:16,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 07:49:16,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:49:16,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 07:49:16,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2023-09-01 07:49:17,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 197 [2023-09-01 07:49:17,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 466 transitions, 7293 flow. Second operand has 15 states, 15 states have (on average 78.73333333333333) internal successors, (1181), 15 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:17,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:49:17,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 197 [2023-09-01 07:49:17,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:49:20,218 INFO L130 PetriNetUnfolder]: 11063/16757 cut-off events. [2023-09-01 07:49:20,218 INFO L131 PetriNetUnfolder]: For 200538/200538 co-relation queries the response was YES. [2023-09-01 07:49:20,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86750 conditions, 16757 events. 11063/16757 cut-off events. For 200538/200538 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 107193 event pairs, 679 based on Foata normal form. 1168/17923 useless extension candidates. Maximal degree in co-relation 86702. Up to 5946 conditions per place. [2023-09-01 07:49:20,371 INFO L137 encePairwiseOnDemand]: 189/197 looper letters, 247 selfloop transitions, 337 changer transitions 22/608 dead transitions. [2023-09-01 07:49:20,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 608 transitions, 9801 flow [2023-09-01 07:49:20,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 07:49:20,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 07:49:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1061 transitions. [2023-09-01 07:49:20,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4488155668358714 [2023-09-01 07:49:20,374 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1061 transitions. [2023-09-01 07:49:20,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1061 transitions. [2023-09-01 07:49:20,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:49:20,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1061 transitions. [2023-09-01 07:49:20,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 88.41666666666667) internal successors, (1061), 12 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:20,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 197.0) internal successors, (2561), 13 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:20,382 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 197.0) internal successors, (2561), 13 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:20,382 INFO L175 Difference]: Start difference. First operand has 143 places, 466 transitions, 7293 flow. Second operand 12 states and 1061 transitions. [2023-09-01 07:49:20,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 608 transitions, 9801 flow [2023-09-01 07:49:21,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 608 transitions, 8305 flow, removed 667 selfloop flow, removed 7 redundant places. [2023-09-01 07:49:21,632 INFO L231 Difference]: Finished difference. Result has 153 places, 513 transitions, 7775 flow [2023-09-01 07:49:21,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=5587, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7775, PETRI_PLACES=153, PETRI_TRANSITIONS=513} [2023-09-01 07:49:21,633 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 119 predicate places. [2023-09-01 07:49:21,633 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 513 transitions, 7775 flow [2023-09-01 07:49:21,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 78.73333333333333) internal successors, (1181), 15 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:21,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:49:21,634 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:49:21,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-09-01 07:49:21,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:49:21,837 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-09-01 07:49:21,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:49:21,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1890407148, now seen corresponding path program 2 times [2023-09-01 07:49:21,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:49:21,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153233055] [2023-09-01 07:49:21,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:49:21,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:49:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:49:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:22,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:49:22,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153233055] [2023-09-01 07:49:22,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153233055] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:49:22,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611217326] [2023-09-01 07:49:22,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 07:49:22,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:49:22,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:49:22,113 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) [2023-09-01 07:49:22,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 07:49:22,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 07:49:22,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:49:22,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 07:49:22,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:49:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:22,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:49:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:23,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611217326] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:49:23,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:49:23,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-09-01 07:49:23,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685881490] [2023-09-01 07:49:23,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:49:23,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 07:49:23,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:49:23,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 07:49:23,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2023-09-01 07:49:23,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 197 [2023-09-01 07:49:23,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 513 transitions, 7775 flow. Second operand has 14 states, 14 states have (on average 80.14285714285714) internal successors, (1122), 14 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:23,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:49:23,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 197 [2023-09-01 07:49:23,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:49:26,815 INFO L130 PetriNetUnfolder]: 13555/20411 cut-off events. [2023-09-01 07:49:26,815 INFO L131 PetriNetUnfolder]: For 189894/189894 co-relation queries the response was YES. [2023-09-01 07:49:26,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103407 conditions, 20411 events. 13555/20411 cut-off events. For 189894/189894 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 131862 event pairs, 767 based on Foata normal form. 262/20671 useless extension candidates. Maximal degree in co-relation 103358. Up to 10943 conditions per place. [2023-09-01 07:49:27,116 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 394 selfloop transitions, 372 changer transitions 18/786 dead transitions. [2023-09-01 07:49:27,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 786 transitions, 12036 flow [2023-09-01 07:49:27,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 07:49:27,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 07:49:27,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1447 transitions. [2023-09-01 07:49:27,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590736040609137 [2023-09-01 07:49:27,120 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1447 transitions. [2023-09-01 07:49:27,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1447 transitions. [2023-09-01 07:49:27,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:49:27,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1447 transitions. [2023-09-01 07:49:27,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 90.4375) internal successors, (1447), 16 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:27,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 197.0) internal successors, (3349), 17 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:27,127 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 197.0) internal successors, (3349), 17 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:27,127 INFO L175 Difference]: Start difference. First operand has 153 places, 513 transitions, 7775 flow. Second operand 16 states and 1447 transitions. [2023-09-01 07:49:27,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 786 transitions, 12036 flow [2023-09-01 07:49:29,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 786 transitions, 11793 flow, removed 118 selfloop flow, removed 3 redundant places. [2023-09-01 07:49:29,062 INFO L231 Difference]: Finished difference. Result has 172 places, 644 transitions, 11060 flow [2023-09-01 07:49:29,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=7512, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=11060, PETRI_PLACES=172, PETRI_TRANSITIONS=644} [2023-09-01 07:49:29,063 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 138 predicate places. [2023-09-01 07:49:29,063 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 644 transitions, 11060 flow [2023-09-01 07:49:29,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 80.14285714285714) internal successors, (1122), 14 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:29,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:49:29,064 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:49:29,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 07:49:29,273 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,SelfDestructingSolverStorable10 [2023-09-01 07:49:29,273 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-09-01 07:49:29,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:49:29,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1543992597, now seen corresponding path program 1 times [2023-09-01 07:49:29,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:49:29,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72475843] [2023-09-01 07:49:29,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:49:29,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:49:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:49:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:29,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:49:29,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72475843] [2023-09-01 07:49:29,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72475843] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:49:29,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872953507] [2023-09-01 07:49:29,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:49:29,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:49:29,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:49:29,625 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) [2023-09-01 07:49:29,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 07:49:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:49:29,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 07:49:29,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:49:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:29,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:49:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:30,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872953507] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:49:30,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:49:30,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-09-01 07:49:30,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525740417] [2023-09-01 07:49:30,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:49:30,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 07:49:30,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:49:30,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 07:49:30,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2023-09-01 07:49:31,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-09-01 07:49:31,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 644 transitions, 11060 flow. Second operand has 22 states, 22 states have (on average 77.63636363636364) internal successors, (1708), 22 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:31,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:49:31,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-09-01 07:49:31,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:49:43,512 INFO L130 PetriNetUnfolder]: 28973/43331 cut-off events. [2023-09-01 07:49:43,512 INFO L131 PetriNetUnfolder]: For 453510/453510 co-relation queries the response was YES. [2023-09-01 07:49:43,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221983 conditions, 43331 events. 28973/43331 cut-off events. For 453510/453510 co-relation queries the response was YES. Maximal size of possible extension queue 1967. Compared 309885 event pairs, 397 based on Foata normal form. 1916/45245 useless extension candidates. Maximal degree in co-relation 221928. Up to 5224 conditions per place. [2023-09-01 07:49:44,058 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 454 selfloop transitions, 1415 changer transitions 85/1956 dead transitions. [2023-09-01 07:49:44,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 1956 transitions, 30167 flow [2023-09-01 07:49:44,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-09-01 07:49:44,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-09-01 07:49:44,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 5828 transitions. [2023-09-01 07:49:44,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44154860216683084 [2023-09-01 07:49:44,069 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 5828 transitions. [2023-09-01 07:49:44,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 5828 transitions. [2023-09-01 07:49:44,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:49:44,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 5828 transitions. [2023-09-01 07:49:44,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 86.98507462686567) internal successors, (5828), 67 states have internal predecessors, (5828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:44,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 197.0) internal successors, (13396), 68 states have internal predecessors, (13396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:44,102 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 197.0) internal successors, (13396), 68 states have internal predecessors, (13396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:44,103 INFO L175 Difference]: Start difference. First operand has 172 places, 644 transitions, 11060 flow. Second operand 67 states and 5828 transitions. [2023-09-01 07:49:44,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 1956 transitions, 30167 flow [2023-09-01 07:49:52,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 1956 transitions, 29991 flow, removed 81 selfloop flow, removed 4 redundant places. [2023-09-01 07:49:52,622 INFO L231 Difference]: Finished difference. Result has 241 places, 1501 transitions, 28392 flow [2023-09-01 07:49:52,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=10619, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=592, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=28392, PETRI_PLACES=241, PETRI_TRANSITIONS=1501} [2023-09-01 07:49:52,623 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 207 predicate places. [2023-09-01 07:49:52,624 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 1501 transitions, 28392 flow [2023-09-01 07:49:52,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 77.63636363636364) internal successors, (1708), 22 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:52,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:49:52,624 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:49:52,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-09-01 07:49:52,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:49:52,825 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-09-01 07:49:52,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:49:52,825 INFO L85 PathProgramCache]: Analyzing trace with hash -303418250, now seen corresponding path program 2 times [2023-09-01 07:49:52,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:49:52,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958341073] [2023-09-01 07:49:52,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:49:52,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:49:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:49:53,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:53,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:49:53,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958341073] [2023-09-01 07:49:53,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958341073] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:49:53,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410162001] [2023-09-01 07:49:53,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 07:49:53,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:49:53,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:49:53,237 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) [2023-09-01 07:49:53,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 07:49:53,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 07:49:53,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:49:53,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 07:49:53,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:49:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:53,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:49:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:49:53,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410162001] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:49:53,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:49:53,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-09-01 07:49:53,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450857087] [2023-09-01 07:49:53,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:49:53,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 07:49:53,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:49:53,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 07:49:53,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2023-09-01 07:49:54,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-09-01 07:49:54,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 1501 transitions, 28392 flow. Second operand has 22 states, 22 states have (on average 77.63636363636364) internal successors, (1708), 22 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:49:54,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:49:54,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-09-01 07:49:54,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:50:20,509 INFO L130 PetriNetUnfolder]: 55441/81771 cut-off events. [2023-09-01 07:50:20,509 INFO L131 PetriNetUnfolder]: For 912050/912050 co-relation queries the response was YES. [2023-09-01 07:50:21,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467989 conditions, 81771 events. 55441/81771 cut-off events. For 912050/912050 co-relation queries the response was YES. Maximal size of possible extension queue 3688. Compared 616059 event pairs, 1395 based on Foata normal form. 786/82555 useless extension candidates. Maximal degree in co-relation 467926. Up to 11135 conditions per place. [2023-09-01 07:50:22,023 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 533 selfloop transitions, 3016 changer transitions 42/3593 dead transitions. [2023-09-01 07:50:22,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 3593 transitions, 68633 flow [2023-09-01 07:50:22,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-09-01 07:50:22,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-09-01 07:50:22,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 5118 transitions. [2023-09-01 07:50:22,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44033382087240813 [2023-09-01 07:50:22,042 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 5118 transitions. [2023-09-01 07:50:22,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 5118 transitions. [2023-09-01 07:50:22,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:50:22,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 5118 transitions. [2023-09-01 07:50:22,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 86.7457627118644) internal successors, (5118), 59 states have internal predecessors, (5118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:50:22,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 197.0) internal successors, (11820), 60 states have internal predecessors, (11820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:50:22,070 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 197.0) internal successors, (11820), 60 states have internal predecessors, (11820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:50:22,071 INFO L175 Difference]: Start difference. First operand has 241 places, 1501 transitions, 28392 flow. Second operand 59 states and 5118 transitions. [2023-09-01 07:50:22,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 3593 transitions, 68633 flow [2023-09-01 07:51:04,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 3593 transitions, 63586 flow, removed 2289 selfloop flow, removed 6 redundant places. [2023-09-01 07:51:04,641 INFO L231 Difference]: Finished difference. Result has 300 places, 3182 transitions, 62644 flow [2023-09-01 07:51:04,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=26151, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=62644, PETRI_PLACES=300, PETRI_TRANSITIONS=3182} [2023-09-01 07:51:04,643 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 266 predicate places. [2023-09-01 07:51:04,643 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 3182 transitions, 62644 flow [2023-09-01 07:51:04,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 77.63636363636364) internal successors, (1708), 22 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:51:04,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:51:04,644 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:51:04,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 07:51:04,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 07:51:04,850 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-09-01 07:51:04,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:51:04,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1929491086, now seen corresponding path program 2 times [2023-09-01 07:51:04,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:51:04,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098805225] [2023-09-01 07:51:04,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:51:04,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:51:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:51:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:51:05,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:51:05,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098805225] [2023-09-01 07:51:05,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098805225] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:51:05,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517261799] [2023-09-01 07:51:05,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 07:51:05,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:51:05,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:51:05,159 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 07:51:05,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 07:51:05,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 07:51:05,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:51:05,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 07:51:05,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:51:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:51:05,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:51:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:51:05,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517261799] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:51:05,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:51:05,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2023-09-01 07:51:05,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192411680] [2023-09-01 07:51:05,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:51:05,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 07:51:05,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:51:05,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 07:51:05,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2023-09-01 07:51:06,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-09-01 07:51:06,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 3182 transitions, 62644 flow. Second operand has 20 states, 20 states have (on average 77.8) internal successors, (1556), 20 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:51:06,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:51:06,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-09-01 07:51:06,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:51:48,606 INFO L130 PetriNetUnfolder]: 62629/92343 cut-off events. [2023-09-01 07:51:48,606 INFO L131 PetriNetUnfolder]: For 994460/994460 co-relation queries the response was YES. [2023-09-01 07:51:50,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530389 conditions, 92343 events. 62629/92343 cut-off events. For 994460/994460 co-relation queries the response was YES. Maximal size of possible extension queue 4250. Compared 706552 event pairs, 4387 based on Foata normal form. 1592/93933 useless extension candidates. Maximal degree in co-relation 530320. Up to 31082 conditions per place. [2023-09-01 07:51:50,283 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 455 selfloop transitions, 3382 changer transitions 38/3877 dead transitions. [2023-09-01 07:51:50,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 3877 transitions, 79990 flow [2023-09-01 07:51:50,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 07:51:50,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 07:51:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2435 transitions. [2023-09-01 07:51:50,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44144307469180566 [2023-09-01 07:51:50,287 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2435 transitions. [2023-09-01 07:51:50,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2435 transitions. [2023-09-01 07:51:50,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:51:50,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2435 transitions. [2023-09-01 07:51:50,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 86.96428571428571) internal successors, (2435), 28 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:51:50,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 197.0) internal successors, (5713), 29 states have internal predecessors, (5713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:51:50,303 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 197.0) internal successors, (5713), 29 states have internal predecessors, (5713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:51:50,303 INFO L175 Difference]: Start difference. First operand has 300 places, 3182 transitions, 62644 flow. Second operand 28 states and 2435 transitions. [2023-09-01 07:51:50,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 3877 transitions, 79990 flow [2023-09-01 07:52:46,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 3877 transitions, 77220 flow, removed 1184 selfloop flow, removed 8 redundant places. [2023-09-01 07:52:46,798 INFO L231 Difference]: Finished difference. Result has 323 places, 3675 transitions, 78642 flow [2023-09-01 07:52:46,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=56989, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3034, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2754, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=78642, PETRI_PLACES=323, PETRI_TRANSITIONS=3675} [2023-09-01 07:52:46,802 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 289 predicate places. [2023-09-01 07:52:46,802 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 3675 transitions, 78642 flow [2023-09-01 07:52:46,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 77.8) internal successors, (1556), 20 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:52:46,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:52:46,803 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:52:46,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 07:52:47,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 07:52:47,008 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-09-01 07:52:47,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:52:47,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1929457606, now seen corresponding path program 3 times [2023-09-01 07:52:47,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:52:47,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164265022] [2023-09-01 07:52:47,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:52:47,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:52:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:52:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:52:47,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:52:47,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164265022] [2023-09-01 07:52:47,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164265022] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:52:47,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572012048] [2023-09-01 07:52:47,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 07:52:47,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:52:47,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:52:47,289 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 07:52:47,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 07:52:47,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 07:52:47,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:52:47,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 07:52:47,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:52:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:52:47,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:52:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:52:48,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572012048] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:52:48,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:52:48,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-09-01 07:52:48,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746317459] [2023-09-01 07:52:48,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:52:48,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 07:52:48,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:52:48,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 07:52:48,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2023-09-01 07:52:48,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-09-01 07:52:48,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 3675 transitions, 78642 flow. Second operand has 21 states, 21 states have (on average 77.52380952380952) internal successors, (1628), 21 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:52:48,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:52:48,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-09-01 07:52:48,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:53:56,630 INFO L130 PetriNetUnfolder]: 81507/119767 cut-off events. [2023-09-01 07:53:56,631 INFO L131 PetriNetUnfolder]: For 1408722/1408722 co-relation queries the response was YES. [2023-09-01 07:53:58,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734545 conditions, 119767 events. 81507/119767 cut-off events. For 1408722/1408722 co-relation queries the response was YES. Maximal size of possible extension queue 5536. Compared 939666 event pairs, 3963 based on Foata normal form. 1788/121553 useless extension candidates. Maximal degree in co-relation 734472. Up to 23612 conditions per place. [2023-09-01 07:53:58,871 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 778 selfloop transitions, 4241 changer transitions 44/5065 dead transitions. [2023-09-01 07:53:58,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 5065 transitions, 114571 flow [2023-09-01 07:53:58,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 07:53:58,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 07:53:58,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2694 transitions. [2023-09-01 07:53:58,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4411331259210742 [2023-09-01 07:53:58,874 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2694 transitions. [2023-09-01 07:53:58,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2694 transitions. [2023-09-01 07:53:58,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:53:58,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2694 transitions. [2023-09-01 07:53:58,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 86.90322580645162) internal successors, (2694), 31 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:53:58,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 197.0) internal successors, (6304), 32 states have internal predecessors, (6304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:53:58,884 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 197.0) internal successors, (6304), 32 states have internal predecessors, (6304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:53:58,884 INFO L175 Difference]: Start difference. First operand has 323 places, 3675 transitions, 78642 flow. Second operand 31 states and 2694 transitions. [2023-09-01 07:53:58,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 5065 transitions, 114571 flow [2023-09-01 07:56:12,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 5065 transitions, 114008 flow, removed 248 selfloop flow, removed 9 redundant places. [2023-09-01 07:56:12,227 INFO L231 Difference]: Finished difference. Result has 358 places, 4844 transitions, 119868 flow [2023-09-01 07:56:12,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=76476, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3068, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=119868, PETRI_PLACES=358, PETRI_TRANSITIONS=4844} [2023-09-01 07:56:12,230 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 324 predicate places. [2023-09-01 07:56:12,230 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 4844 transitions, 119868 flow [2023-09-01 07:56:12,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 77.52380952380952) internal successors, (1628), 21 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:56:12,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:56:12,231 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:56:12,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 07:56:12,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 07:56:12,432 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-09-01 07:56:12,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:56:12,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1034135572, now seen corresponding path program 1 times [2023-09-01 07:56:12,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:56:12,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507946050] [2023-09-01 07:56:12,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:56:12,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:56:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:56:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:56:12,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:56:12,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507946050] [2023-09-01 07:56:12,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507946050] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:56:12,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502082440] [2023-09-01 07:56:12,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:56:12,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:56:12,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:56:12,817 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 07:56:12,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 07:56:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:56:12,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 07:56:12,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:56:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:56:13,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:56:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:56:13,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502082440] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:56:13,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:56:13,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2023-09-01 07:56:13,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385134445] [2023-09-01 07:56:13,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:56:13,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 07:56:13,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:56:13,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 07:56:13,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-09-01 07:56:13,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 197 [2023-09-01 07:56:13,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 4844 transitions, 119868 flow. Second operand has 23 states, 23 states have (on average 77.56521739130434) internal successors, (1784), 23 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:56:13,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:56:13,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 197 [2023-09-01 07:56:13,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:58:22,156 INFO L130 PetriNetUnfolder]: 95533/140441 cut-off events. [2023-09-01 07:58:22,156 INFO L131 PetriNetUnfolder]: For 2121146/2121146 co-relation queries the response was YES. [2023-09-01 07:58:24,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963673 conditions, 140441 events. 95533/140441 cut-off events. For 2121146/2121146 co-relation queries the response was YES. Maximal size of possible extension queue 6516. Compared 1125764 event pairs, 8111 based on Foata normal form. 1270/141709 useless extension candidates. Maximal degree in co-relation 963586. Up to 57922 conditions per place. [2023-09-01 07:58:25,139 INFO L137 encePairwiseOnDemand]: 188/197 looper letters, 600 selfloop transitions, 5511 changer transitions 77/6190 dead transitions. [2023-09-01 07:58:25,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 6190 transitions, 155413 flow [2023-09-01 07:58:25,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-09-01 07:58:25,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-09-01 07:58:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5579 transitions. [2023-09-01 07:58:25,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43568918391253414 [2023-09-01 07:58:25,146 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 5579 transitions. [2023-09-01 07:58:25,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 5579 transitions. [2023-09-01 07:58:25,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:58:25,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 5579 transitions. [2023-09-01 07:58:25,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 85.83076923076923) internal successors, (5579), 65 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:58:25,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 197.0) internal successors, (13002), 66 states have internal predecessors, (13002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:58:25,170 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 197.0) internal successors, (13002), 66 states have internal predecessors, (13002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 07:58:25,170 INFO L175 Difference]: Start difference. First operand has 358 places, 4844 transitions, 119868 flow. Second operand 65 states and 5579 transitions. [2023-09-01 07:58:25,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 6190 transitions, 155413 flow Killed by 15