./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-trans.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/array-eq-trans.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 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 --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 07:20:41,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 07:20:41,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 07:20:41,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 07:20:41,660 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 07:20:41,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 07:20:41,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 07:20:41,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 07:20:41,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 07:20:41,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 07:20:41,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 07:20:41,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 07:20:41,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 07:20:41,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 07:20:41,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 07:20:41,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 07:20:41,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 07:20:41,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 07:20:41,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 07:20:41,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 07:20:41,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 07:20:41,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 07:20:41,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 07:20:41,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 07:20:41,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 07:20:41,712 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 07:20:41,713 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 07:20:41,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 07:20:41,714 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 07:20:41,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 07:20:41,718 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 07:20:41,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 07:20:41,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 07:20:41,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 07:20:41,721 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 07:20:41,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 07:20:41,723 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 07:20:41,724 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 07:20:41,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 07:20:41,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 07:20:41,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 07:20:41,726 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 07:20:41,757 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 07:20:41,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 07:20:41,759 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 07:20:41,759 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 07:20:41,760 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 07:20:41,760 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 07:20:41,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 07:20:41,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 07:20:41,761 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 07:20:41,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 07:20:41,762 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 07:20:41,762 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 07:20:41,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 07:20:41,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 07:20:41,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 07:20:41,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 07:20:41,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 07:20:41,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 07:20:41,763 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 07:20:41,763 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 07:20:41,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 07:20:41,764 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 07:20:41,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 07:20:41,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 07:20:41,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 07:20:41,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 07:20:41,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 07:20:41,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 07:20:41,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 07:20:41,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 07:20:41,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 07:20:41,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 07:20:41,766 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 07:20:41,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 07:20:41,766 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 07:20:41,767 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 07:20:41,767 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 07:20:41,767 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 07:20:42,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 07:20:42,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 07:20:42,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 07:20:42,145 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 07:20:42,146 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 07:20:42,147 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2023-09-01 07:20:43,427 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 07:20:43,657 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 07:20:43,658 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2023-09-01 07:20:43,664 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70a7a0f5d/c90c604f5d5e48c1a64ceaaa8df1ba33/FLAG377c37f0f [2023-09-01 07:20:43,679 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70a7a0f5d/c90c604f5d5e48c1a64ceaaa8df1ba33 [2023-09-01 07:20:43,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 07:20:43,683 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 07:20:43,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 07:20:43,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 07:20:43,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 07:20:43,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 07:20:43" (1/1) ... [2023-09-01 07:20:43,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a4e0182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:20:43, skipping insertion in model container [2023-09-01 07:20:43,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 07:20:43" (1/1) ... [2023-09-01 07:20:43,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 07:20:43,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 07:20:43,894 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/array-eq-trans.wvr.c[2737,2750] [2023-09-01 07:20:43,902 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 07:20:43,913 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 07:20:43,952 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/array-eq-trans.wvr.c[2737,2750] [2023-09-01 07:20:43,958 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 07:20:43,975 INFO L208 MainTranslator]: Completed translation [2023-09-01 07:20:43,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:20:43 WrapperNode [2023-09-01 07:20:43,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 07:20:43,978 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 07:20:43,978 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 07:20:43,978 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 07:20:43,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:20:43" (1/1) ... [2023-09-01 07:20:44,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:20:43" (1/1) ... [2023-09-01 07:20:44,040 INFO L138 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 216 [2023-09-01 07:20:44,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 07:20:44,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 07:20:44,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 07:20:44,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 07:20:44,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:20:43" (1/1) ... [2023-09-01 07:20:44,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:20:43" (1/1) ... [2023-09-01 07:20:44,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:20:43" (1/1) ... [2023-09-01 07:20:44,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:20:43" (1/1) ... [2023-09-01 07:20:44,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:20:43" (1/1) ... [2023-09-01 07:20:44,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:20:43" (1/1) ... [2023-09-01 07:20:44,095 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:20:43" (1/1) ... [2023-09-01 07:20:44,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:20:43" (1/1) ... [2023-09-01 07:20:44,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 07:20:44,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 07:20:44,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 07:20:44,106 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 07:20:44,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:20:43" (1/1) ... [2023-09-01 07:20:44,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 07:20:44,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:20:44,135 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 07:20:44,161 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 07:20:44,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 07:20:44,172 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 07:20:44,172 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 07:20:44,172 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 07:20:44,172 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 07:20:44,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 07:20:44,173 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 07:20:44,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 07:20:44,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 07:20:44,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 07:20:44,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 07:20:44,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 07:20:44,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 07:20:44,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 07:20:44,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 07:20:44,175 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 07:20:44,345 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 07:20:44,346 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 07:20:44,834 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 07:20:44,844 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 07:20:44,844 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-09-01 07:20:44,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 07:20:44 BoogieIcfgContainer [2023-09-01 07:20:44,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 07:20:44,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 07:20:44,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 07:20:44,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 07:20:44,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 07:20:43" (1/3) ... [2023-09-01 07:20:44,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2038a5b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 07:20:44, skipping insertion in model container [2023-09-01 07:20:44,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 07:20:43" (2/3) ... [2023-09-01 07:20:44,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2038a5b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 07:20:44, skipping insertion in model container [2023-09-01 07:20:44,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 07:20:44" (3/3) ... [2023-09-01 07:20:44,855 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2023-09-01 07:20:44,862 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 07:20:44,870 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 07:20:44,870 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-09-01 07:20:44,871 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 07:20:44,989 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 07:20:45,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 310 transitions, 644 flow [2023-09-01 07:20:45,180 INFO L130 PetriNetUnfolder]: 30/307 cut-off events. [2023-09-01 07:20:45,182 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 07:20:45,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 307 events. 30/307 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 328 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 209. Up to 3 conditions per place. [2023-09-01 07:20:45,191 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 310 transitions, 644 flow [2023-09-01 07:20:45,199 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 235 transitions, 485 flow [2023-09-01 07:20:45,204 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 07:20:45,222 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 224 places, 235 transitions, 485 flow [2023-09-01 07:20:45,229 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 224 places, 235 transitions, 485 flow [2023-09-01 07:20:45,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 235 transitions, 485 flow [2023-09-01 07:20:45,271 INFO L130 PetriNetUnfolder]: 21/235 cut-off events. [2023-09-01 07:20:45,271 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 07:20:45,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 235 events. 21/235 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 270 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 209. Up to 3 conditions per place. [2023-09-01 07:20:45,276 INFO L119 LiptonReduction]: Number of co-enabled transitions 3840 [2023-09-01 07:20:52,811 INFO L134 LiptonReduction]: Checked pairs total: 5555 [2023-09-01 07:20:52,811 INFO L136 LiptonReduction]: Total number of compositions: 265 [2023-09-01 07:20:52,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 07:20:52,830 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;@582c1f82, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 07:20:52,830 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-09-01 07:20:52,834 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 07:20:52,834 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 07:20:52,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:20:52,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 07:20:52,836 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:20:52,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:20:52,841 INFO L85 PathProgramCache]: Analyzing trace with hash 35310, now seen corresponding path program 1 times [2023-09-01 07:20:52,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:20:52,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160819950] [2023-09-01 07:20:52,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:20:52,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:20:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:20:53,110 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 07:20:53,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:20:53,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160819950] [2023-09-01 07:20:53,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160819950] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:20:53,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:20:53,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 07:20:53,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494781942] [2023-09-01 07:20:53,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:20:53,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:20:53,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:20:53,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:20:53,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 07:20:53,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 575 [2023-09-01 07:20:53,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 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 07:20:53,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:20:53,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 575 [2023-09-01 07:20:53,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:20:53,522 INFO L130 PetriNetUnfolder]: 1623/2253 cut-off events. [2023-09-01 07:20:53,522 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2023-09-01 07:20:53,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4683 conditions, 2253 events. 1623/2253 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 8622 event pairs, 1054 based on Foata normal form. 0/989 useless extension candidates. Maximal degree in co-relation 2004. Up to 1131 conditions per place. [2023-09-01 07:20:53,539 INFO L137 encePairwiseOnDemand]: 563/575 looper letters, 65 selfloop transitions, 6 changer transitions 0/71 dead transitions. [2023-09-01 07:20:53,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 71 transitions, 314 flow [2023-09-01 07:20:53,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:20:53,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:20:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 914 transitions. [2023-09-01 07:20:53,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5298550724637681 [2023-09-01 07:20:53,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 914 transitions. [2023-09-01 07:20:53,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 914 transitions. [2023-09-01 07:20:53,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:20:53,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 914 transitions. [2023-09-01 07:20:53,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.6666666666667) internal successors, (914), 3 states have internal predecessors, (914), 0 states have call successors, (0), 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 07:20:53,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 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 07:20:53,582 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 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 07:20:53,583 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 93 flow. Second operand 3 states and 914 transitions. [2023-09-01 07:20:53,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 71 transitions, 314 flow [2023-09-01 07:20:53,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 71 transitions, 296 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-09-01 07:20:53,592 INFO L231 Difference]: Finished difference. Result has 40 places, 44 transitions, 140 flow [2023-09-01 07:20:53,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=40, PETRI_TRANSITIONS=44} [2023-09-01 07:20:53,597 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2023-09-01 07:20:53,597 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 44 transitions, 140 flow [2023-09-01 07:20:53,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 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 07:20:53,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:20:53,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 07:20:53,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 07:20:53,602 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:20:53,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:20:53,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1096113, now seen corresponding path program 1 times [2023-09-01 07:20:53,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:20:53,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066275917] [2023-09-01 07:20:53,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:20:53,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:20:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:20:53,787 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 07:20:53,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:20:53,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066275917] [2023-09-01 07:20:53,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066275917] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:20:53,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73240236] [2023-09-01 07:20:53,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:20:53,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:20:53,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:20:53,798 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 07:20:53,806 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 07:20:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:20:53,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 07:20:53,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:20:53,918 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 07:20:53,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:20:53,933 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 07:20:53,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73240236] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:20:53,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:20:53,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-09-01 07:20:53,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304617572] [2023-09-01 07:20:53,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:20:53,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 07:20:53,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:20:53,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 07:20:53,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 07:20:54,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 575 [2023-09-01 07:20:54,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 44 transitions, 140 flow. Second operand has 7 states, 7 states have (on average 280.14285714285717) internal successors, (1961), 7 states have internal predecessors, (1961), 0 states have call successors, (0), 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 07:20:54,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:20:54,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 575 [2023-09-01 07:20:54,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:20:54,751 INFO L130 PetriNetUnfolder]: 4065/5631 cut-off events. [2023-09-01 07:20:54,752 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2023-09-01 07:20:54,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11599 conditions, 5631 events. 4065/5631 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 24519 event pairs, 2635 based on Foata normal form. 0/2486 useless extension candidates. Maximal degree in co-relation 9195. Up to 1129 conditions per place. [2023-09-01 07:20:54,788 INFO L137 encePairwiseOnDemand]: 563/575 looper letters, 143 selfloop transitions, 33 changer transitions 0/176 dead transitions. [2023-09-01 07:20:54,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 176 transitions, 840 flow [2023-09-01 07:20:54,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 07:20:54,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 07:20:54,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2138 transitions. [2023-09-01 07:20:54,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311801242236025 [2023-09-01 07:20:54,794 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2138 transitions. [2023-09-01 07:20:54,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2138 transitions. [2023-09-01 07:20:54,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:20:54,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2138 transitions. [2023-09-01 07:20:54,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 305.42857142857144) internal successors, (2138), 7 states have internal predecessors, (2138), 0 states have call successors, (0), 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 07:20:54,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 575.0) internal successors, (4600), 8 states have internal predecessors, (4600), 0 states have call successors, (0), 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 07:20:54,809 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 575.0) internal successors, (4600), 8 states have internal predecessors, (4600), 0 states have call successors, (0), 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 07:20:54,809 INFO L175 Difference]: Start difference. First operand has 40 places, 44 transitions, 140 flow. Second operand 7 states and 2138 transitions. [2023-09-01 07:20:54,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 176 transitions, 840 flow [2023-09-01 07:20:54,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 176 transitions, 816 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 07:20:54,816 INFO L231 Difference]: Finished difference. Result has 47 places, 68 transitions, 347 flow [2023-09-01 07:20:54,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=347, PETRI_PLACES=47, PETRI_TRANSITIONS=68} [2023-09-01 07:20:54,817 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2023-09-01 07:20:54,817 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 68 transitions, 347 flow [2023-09-01 07:20:54,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 280.14285714285717) internal successors, (1961), 7 states have internal predecessors, (1961), 0 states have call successors, (0), 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 07:20:54,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:20:54,819 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-09-01 07:20:54,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 07:20:55,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:20:55,028 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:20:55,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:20:55,029 INFO L85 PathProgramCache]: Analyzing trace with hash 33980558, now seen corresponding path program 1 times [2023-09-01 07:20:55,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:20:55,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596244918] [2023-09-01 07:20:55,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:20:55,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:20:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:20:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 07:20:55,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:20:55,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596244918] [2023-09-01 07:20:55,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596244918] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:20:55,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:20:55,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 07:20:55,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240010130] [2023-09-01 07:20:55,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:20:55,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:20:55,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:20:55,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:20:55,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 07:20:55,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 575 [2023-09-01 07:20:55,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 68 transitions, 347 flow. Second operand has 3 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 0 states have call successors, (0), 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 07:20:55,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:20:55,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 575 [2023-09-01 07:20:55,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:20:55,647 INFO L130 PetriNetUnfolder]: 4056/5619 cut-off events. [2023-09-01 07:20:55,647 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2023-09-01 07:20:55,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11602 conditions, 5619 events. 4056/5619 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 25002 event pairs, 2635 based on Foata normal form. 2/2487 useless extension candidates. Maximal degree in co-relation 6933. Up to 5619 conditions per place. [2023-09-01 07:20:55,692 INFO L137 encePairwiseOnDemand]: 571/575 looper letters, 55 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-09-01 07:20:55,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 378 flow [2023-09-01 07:20:55,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:20:55,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:20:55,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 876 transitions. [2023-09-01 07:20:55,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078260869565218 [2023-09-01 07:20:55,696 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 876 transitions. [2023-09-01 07:20:55,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 876 transitions. [2023-09-01 07:20:55,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:20:55,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 876 transitions. [2023-09-01 07:20:55,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 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 07:20:55,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 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 07:20:55,703 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 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 07:20:55,703 INFO L175 Difference]: Start difference. First operand has 47 places, 68 transitions, 347 flow. Second operand 3 states and 876 transitions. [2023-09-01 07:20:55,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 378 flow [2023-09-01 07:20:55,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 348 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-09-01 07:20:55,709 INFO L231 Difference]: Finished difference. Result has 44 places, 56 transitions, 238 flow [2023-09-01 07:20:55,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=44, PETRI_TRANSITIONS=56} [2023-09-01 07:20:55,711 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2023-09-01 07:20:55,711 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 56 transitions, 238 flow [2023-09-01 07:20:55,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 0 states have call successors, (0), 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 07:20:55,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:20:55,712 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 07:20:55,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 07:20:55,712 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:20:55,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:20:55,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1704374468, now seen corresponding path program 2 times [2023-09-01 07:20:55,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:20:55,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695041104] [2023-09-01 07:20:55,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:20:55,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:20:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:20:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:20:55,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:20:55,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695041104] [2023-09-01 07:20:55,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695041104] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:20:55,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073418098] [2023-09-01 07:20:55,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 07:20:55,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:20:55,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:20:55,858 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 07:20:55,861 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 07:20:55,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 07:20:55,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:20:55,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 07:20:55,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:20:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 07:20:55,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 07:20:55,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073418098] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:20:55,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 07:20:55,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-09-01 07:20:55,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852968377] [2023-09-01 07:20:55,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:20:55,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:20:55,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:20:55,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:20:55,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 07:20:55,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 575 [2023-09-01 07:20:55,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 56 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 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 07:20:55,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:20:55,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 575 [2023-09-01 07:20:55,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:20:56,495 INFO L130 PetriNetUnfolder]: 4056/5618 cut-off events. [2023-09-01 07:20:56,496 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2023-09-01 07:20:56,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11580 conditions, 5618 events. 4056/5618 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 24992 event pairs, 2635 based on Foata normal form. 1/2487 useless extension candidates. Maximal degree in co-relation 11568. Up to 5613 conditions per place. [2023-09-01 07:20:56,521 INFO L137 encePairwiseOnDemand]: 572/575 looper letters, 49 selfloop transitions, 6 changer transitions 0/55 dead transitions. [2023-09-01 07:20:56,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 338 flow [2023-09-01 07:20:56,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:20:56,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:20:56,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 882 transitions. [2023-09-01 07:20:56,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113043478260869 [2023-09-01 07:20:56,524 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 882 transitions. [2023-09-01 07:20:56,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 882 transitions. [2023-09-01 07:20:56,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:20:56,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 882 transitions. [2023-09-01 07:20:56,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 294.0) internal successors, (882), 3 states have internal predecessors, (882), 0 states have call successors, (0), 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 07:20:56,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 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 07:20:56,531 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 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 07:20:56,531 INFO L175 Difference]: Start difference. First operand has 44 places, 56 transitions, 238 flow. Second operand 3 states and 882 transitions. [2023-09-01 07:20:56,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 338 flow [2023-09-01 07:20:56,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 337 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 07:20:56,534 INFO L231 Difference]: Finished difference. Result has 44 places, 55 transitions, 239 flow [2023-09-01 07:20:56,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=239, PETRI_PLACES=44, PETRI_TRANSITIONS=55} [2023-09-01 07:20:56,534 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2023-09-01 07:20:56,535 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 55 transitions, 239 flow [2023-09-01 07:20:56,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 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 07:20:56,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:20:56,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:20:56,545 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 07:20:56,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-09-01 07:20:56,742 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:20:56,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:20:56,742 INFO L85 PathProgramCache]: Analyzing trace with hash -268262969, now seen corresponding path program 1 times [2023-09-01 07:20:56,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:20:56,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498092745] [2023-09-01 07:20:56,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:20:56,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:20:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:20:56,795 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 07:20:56,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:20:56,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498092745] [2023-09-01 07:20:56,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498092745] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:20:56,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:20:56,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 07:20:56,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296315471] [2023-09-01 07:20:56,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:20:56,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:20:56,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:20:56,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:20:56,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 07:20:56,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 575 [2023-09-01 07:20:56,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 239 flow. Second operand has 3 states, 3 states have (on average 288.3333333333333) internal successors, (865), 3 states have internal predecessors, (865), 0 states have call successors, (0), 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 07:20:56,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:20:56,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 575 [2023-09-01 07:20:56,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:20:57,554 INFO L130 PetriNetUnfolder]: 6776/9358 cut-off events. [2023-09-01 07:20:57,554 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2023-09-01 07:20:57,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19231 conditions, 9358 events. 6776/9358 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 47289 event pairs, 1615 based on Foata normal form. 0/4317 useless extension candidates. Maximal degree in co-relation 19218. Up to 5841 conditions per place. [2023-09-01 07:20:57,604 INFO L137 encePairwiseOnDemand]: 571/575 looper letters, 76 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-09-01 07:20:57,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 78 transitions, 446 flow [2023-09-01 07:20:57,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:20:57,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:20:57,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 918 transitions. [2023-09-01 07:20:57,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5321739130434783 [2023-09-01 07:20:57,608 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 918 transitions. [2023-09-01 07:20:57,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 918 transitions. [2023-09-01 07:20:57,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:20:57,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 918 transitions. [2023-09-01 07:20:57,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 306.0) internal successors, (918), 3 states have internal predecessors, (918), 0 states have call successors, (0), 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 07:20:57,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 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 07:20:57,619 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 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 07:20:57,619 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 239 flow. Second operand 3 states and 918 transitions. [2023-09-01 07:20:57,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 78 transitions, 446 flow [2023-09-01 07:20:57,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 78 transitions, 434 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 07:20:57,622 INFO L231 Difference]: Finished difference. Result has 45 places, 56 transitions, 241 flow [2023-09-01 07:20:57,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=45, PETRI_TRANSITIONS=56} [2023-09-01 07:20:57,624 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2023-09-01 07:20:57,625 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 56 transitions, 241 flow [2023-09-01 07:20:57,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 288.3333333333333) internal successors, (865), 3 states have internal predecessors, (865), 0 states have call successors, (0), 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 07:20:57,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:20:57,625 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-09-01 07:20:57,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 07:20:57,626 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:20:57,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:20:57,626 INFO L85 PathProgramCache]: Analyzing trace with hash -264396176, now seen corresponding path program 1 times [2023-09-01 07:20:57,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:20:57,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585921221] [2023-09-01 07:20:57,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:20:57,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:20:57,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:20:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:20:57,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:20:57,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585921221] [2023-09-01 07:20:57,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585921221] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:20:57,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523116683] [2023-09-01 07:20:57,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:20:57,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:20:57,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:20:57,749 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 07:20:57,752 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 07:20:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:20:57,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 07:20:57,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:20:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:20:57,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:20:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:20:57,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523116683] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:20:57,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:20:57,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 07:20:57,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279156161] [2023-09-01 07:20:57,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:20:57,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 07:20:57,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:20:57,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 07:20:57,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 07:20:58,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 575 [2023-09-01 07:20:58,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 56 transitions, 241 flow. Second operand has 13 states, 13 states have (on average 280.15384615384613) internal successors, (3642), 13 states have internal predecessors, (3642), 0 states have call successors, (0), 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 07:20:58,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:20:58,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 575 [2023-09-01 07:20:58,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:20:59,920 INFO L130 PetriNetUnfolder]: 14906/20584 cut-off events. [2023-09-01 07:20:59,921 INFO L131 PetriNetUnfolder]: For 1483/1483 co-relation queries the response was YES. [2023-09-01 07:20:59,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45121 conditions, 20584 events. 14906/20584 cut-off events. For 1483/1483 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 103648 event pairs, 9911 based on Foata normal form. 12/10638 useless extension candidates. Maximal degree in co-relation 45107. Up to 2289 conditions per place. [2023-09-01 07:21:00,033 INFO L137 encePairwiseOnDemand]: 567/575 looper letters, 315 selfloop transitions, 51 changer transitions 0/366 dead transitions. [2023-09-01 07:21:00,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 366 transitions, 1851 flow [2023-09-01 07:21:00,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 07:21:00,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 07:21:00,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3715 transitions. [2023-09-01 07:21:00,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384057971014493 [2023-09-01 07:21:00,042 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3715 transitions. [2023-09-01 07:21:00,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3715 transitions. [2023-09-01 07:21:00,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:21:00,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3715 transitions. [2023-09-01 07:21:00,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 309.5833333333333) internal successors, (3715), 12 states have internal predecessors, (3715), 0 states have call successors, (0), 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 07:21:00,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 575.0) internal successors, (7475), 13 states have internal predecessors, (7475), 0 states have call successors, (0), 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 07:21:00,062 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 575.0) internal successors, (7475), 13 states have internal predecessors, (7475), 0 states have call successors, (0), 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 07:21:00,063 INFO L175 Difference]: Start difference. First operand has 45 places, 56 transitions, 241 flow. Second operand 12 states and 3715 transitions. [2023-09-01 07:21:00,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 366 transitions, 1851 flow [2023-09-01 07:21:00,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 366 transitions, 1839 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 07:21:00,150 INFO L231 Difference]: Finished difference. Result has 61 places, 86 transitions, 587 flow [2023-09-01 07:21:00,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=587, PETRI_PLACES=61, PETRI_TRANSITIONS=86} [2023-09-01 07:21:00,150 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2023-09-01 07:21:00,151 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 86 transitions, 587 flow [2023-09-01 07:21:00,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 280.15384615384613) internal successors, (3642), 13 states have internal predecessors, (3642), 0 states have call successors, (0), 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 07:21:00,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:21:00,152 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:21:00,161 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 07:21:00,359 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 07:21:00,359 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:21:00,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:21:00,360 INFO L85 PathProgramCache]: Analyzing trace with hash -102605411, now seen corresponding path program 1 times [2023-09-01 07:21:00,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:21:00,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186574438] [2023-09-01 07:21:00,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:21:00,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:21:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:21:00,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:21:00,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:21:00,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186574438] [2023-09-01 07:21:00,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186574438] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:21:00,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:21:00,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 07:21:00,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579566213] [2023-09-01 07:21:00,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:21:00,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:21:00,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:21:00,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:21:00,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 07:21:00,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 575 [2023-09-01 07:21:00,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 86 transitions, 587 flow. Second operand has 3 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 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 07:21:00,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:21:00,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 575 [2023-09-01 07:21:00,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:21:01,670 INFO L130 PetriNetUnfolder]: 13454/18560 cut-off events. [2023-09-01 07:21:01,670 INFO L131 PetriNetUnfolder]: For 1502/1502 co-relation queries the response was YES. [2023-09-01 07:21:01,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39910 conditions, 18560 events. 13454/18560 cut-off events. For 1502/1502 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 93455 event pairs, 8789 based on Foata normal form. 0/9954 useless extension candidates. Maximal degree in co-relation 39889. Up to 18560 conditions per place. [2023-09-01 07:21:01,758 INFO L137 encePairwiseOnDemand]: 573/575 looper letters, 84 selfloop transitions, 1 changer transitions 0/85 dead transitions. [2023-09-01 07:21:01,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 85 transitions, 753 flow [2023-09-01 07:21:01,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:21:01,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:21:01,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 893 transitions. [2023-09-01 07:21:01,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176811594202898 [2023-09-01 07:21:01,762 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 893 transitions. [2023-09-01 07:21:01,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 893 transitions. [2023-09-01 07:21:01,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:21:01,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 893 transitions. [2023-09-01 07:21:01,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.6666666666667) internal successors, (893), 3 states have internal predecessors, (893), 0 states have call successors, (0), 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 07:21:01,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 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 07:21:01,768 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 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 07:21:01,768 INFO L175 Difference]: Start difference. First operand has 61 places, 86 transitions, 587 flow. Second operand 3 states and 893 transitions. [2023-09-01 07:21:01,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 85 transitions, 753 flow [2023-09-01 07:21:01,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 85 transitions, 609 flow, removed 39 selfloop flow, removed 5 redundant places. [2023-09-01 07:21:01,773 INFO L231 Difference]: Finished difference. Result has 57 places, 85 transitions, 441 flow [2023-09-01 07:21:01,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=441, PETRI_PLACES=57, PETRI_TRANSITIONS=85} [2023-09-01 07:21:01,773 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2023-09-01 07:21:01,774 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 85 transitions, 441 flow [2023-09-01 07:21:01,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 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 07:21:01,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:21:01,774 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:21:01,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 07:21:01,775 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:21:01,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:21:01,775 INFO L85 PathProgramCache]: Analyzing trace with hash -102605369, now seen corresponding path program 1 times [2023-09-01 07:21:01,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:21:01,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114526809] [2023-09-01 07:21:01,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:21:01,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:21:01,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:21:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 07:21:01,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:21:01,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114526809] [2023-09-01 07:21:01,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114526809] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:21:01,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:21:01,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 07:21:01,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35405997] [2023-09-01 07:21:01,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:21:01,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 07:21:01,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:21:01,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 07:21:01,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 07:21:01,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 575 [2023-09-01 07:21:01,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 85 transitions, 441 flow. Second operand has 4 states, 4 states have (on average 274.25) internal successors, (1097), 4 states have internal predecessors, (1097), 0 states have call successors, (0), 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 07:21:01,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:21:01,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 575 [2023-09-01 07:21:01,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:21:03,482 INFO L130 PetriNetUnfolder]: 16116/22577 cut-off events. [2023-09-01 07:21:03,482 INFO L131 PetriNetUnfolder]: For 1695/1695 co-relation queries the response was YES. [2023-09-01 07:21:03,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48210 conditions, 22577 events. 16116/22577 cut-off events. For 1695/1695 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 120886 event pairs, 10604 based on Foata normal form. 0/12300 useless extension candidates. Maximal degree in co-relation 48189. Up to 18559 conditions per place. [2023-09-01 07:21:03,596 INFO L137 encePairwiseOnDemand]: 570/575 looper letters, 138 selfloop transitions, 3 changer transitions 0/141 dead transitions. [2023-09-01 07:21:03,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 141 transitions, 1008 flow [2023-09-01 07:21:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 07:21:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 07:21:03,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1152 transitions. [2023-09-01 07:21:03,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5008695652173913 [2023-09-01 07:21:03,604 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1152 transitions. [2023-09-01 07:21:03,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1152 transitions. [2023-09-01 07:21:03,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:21:03,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1152 transitions. [2023-09-01 07:21:03,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 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 07:21:03,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 575.0) internal successors, (2875), 5 states have internal predecessors, (2875), 0 states have call successors, (0), 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 07:21:03,624 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 575.0) internal successors, (2875), 5 states have internal predecessors, (2875), 0 states have call successors, (0), 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 07:21:03,625 INFO L175 Difference]: Start difference. First operand has 57 places, 85 transitions, 441 flow. Second operand 4 states and 1152 transitions. [2023-09-01 07:21:03,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 141 transitions, 1008 flow [2023-09-01 07:21:03,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 141 transitions, 1007 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 07:21:03,630 INFO L231 Difference]: Finished difference. Result has 60 places, 85 transitions, 451 flow [2023-09-01 07:21:03,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=451, PETRI_PLACES=60, PETRI_TRANSITIONS=85} [2023-09-01 07:21:03,633 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2023-09-01 07:21:03,633 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 85 transitions, 451 flow [2023-09-01 07:21:03,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 274.25) internal successors, (1097), 4 states have internal predecessors, (1097), 0 states have call successors, (0), 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 07:21:03,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:21:03,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:21:03,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 07:21:03,634 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:21:03,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:21:03,635 INFO L85 PathProgramCache]: Analyzing trace with hash -98991969, now seen corresponding path program 1 times [2023-09-01 07:21:03,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:21:03,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637874078] [2023-09-01 07:21:03,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:21:03,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:21:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:21:03,684 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 07:21:03,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:21:03,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637874078] [2023-09-01 07:21:03,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637874078] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:21:03,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:21:03,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 07:21:03,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758129489] [2023-09-01 07:21:03,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:21:03,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:21:03,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:21:03,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:21:03,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 07:21:03,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 575 [2023-09-01 07:21:03,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 85 transitions, 451 flow. Second operand has 3 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 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 07:21:03,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:21:03,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 575 [2023-09-01 07:21:03,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:21:06,161 INFO L130 PetriNetUnfolder]: 27380/37647 cut-off events. [2023-09-01 07:21:06,161 INFO L131 PetriNetUnfolder]: For 5721/5721 co-relation queries the response was YES. [2023-09-01 07:21:06,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83414 conditions, 37647 events. 27380/37647 cut-off events. For 5721/5721 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 213624 event pairs, 8316 based on Foata normal form. 0/23938 useless extension candidates. Maximal degree in co-relation 83391. Up to 19141 conditions per place. [2023-09-01 07:21:06,337 INFO L137 encePairwiseOnDemand]: 571/575 looper letters, 104 selfloop transitions, 3 changer transitions 0/107 dead transitions. [2023-09-01 07:21:06,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 107 transitions, 723 flow [2023-09-01 07:21:06,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:21:06,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:21:06,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 914 transitions. [2023-09-01 07:21:06,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5298550724637681 [2023-09-01 07:21:06,344 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 914 transitions. [2023-09-01 07:21:06,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 914 transitions. [2023-09-01 07:21:06,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:21:06,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 914 transitions. [2023-09-01 07:21:06,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.6666666666667) internal successors, (914), 3 states have internal predecessors, (914), 0 states have call successors, (0), 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 07:21:06,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 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 07:21:06,349 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 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 07:21:06,349 INFO L175 Difference]: Start difference. First operand has 60 places, 85 transitions, 451 flow. Second operand 3 states and 914 transitions. [2023-09-01 07:21:06,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 107 transitions, 723 flow [2023-09-01 07:21:06,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 107 transitions, 717 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 07:21:06,358 INFO L231 Difference]: Finished difference. Result has 63 places, 87 transitions, 467 flow [2023-09-01 07:21:06,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=467, PETRI_PLACES=63, PETRI_TRANSITIONS=87} [2023-09-01 07:21:06,359 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2023-09-01 07:21:06,359 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 87 transitions, 467 flow [2023-09-01 07:21:06,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 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 07:21:06,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:21:06,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:21:06,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 07:21:06,360 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:21:06,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:21:06,361 INFO L85 PathProgramCache]: Analyzing trace with hash -98991971, now seen corresponding path program 1 times [2023-09-01 07:21:06,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:21:06,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326297128] [2023-09-01 07:21:06,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:21:06,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:21:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:21:06,404 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 07:21:06,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:21:06,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326297128] [2023-09-01 07:21:06,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326297128] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:21:06,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:21:06,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 07:21:06,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821797726] [2023-09-01 07:21:06,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:21:06,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:21:06,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:21:06,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:21:06,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 07:21:06,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 575 [2023-09-01 07:21:06,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 87 transitions, 467 flow. Second operand has 3 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 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 07:21:06,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:21:06,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 575 [2023-09-01 07:21:06,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:21:08,698 INFO L130 PetriNetUnfolder]: 23310/32389 cut-off events. [2023-09-01 07:21:08,698 INFO L131 PetriNetUnfolder]: For 13324/13324 co-relation queries the response was YES. [2023-09-01 07:21:08,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76704 conditions, 32389 events. 23310/32389 cut-off events. For 13324/13324 co-relation queries the response was YES. Maximal size of possible extension queue 857. Compared 179224 event pairs, 15356 based on Foata normal form. 2376/26446 useless extension candidates. Maximal degree in co-relation 76678. Up to 32389 conditions per place. [2023-09-01 07:21:08,918 INFO L137 encePairwiseOnDemand]: 573/575 looper letters, 84 selfloop transitions, 1 changer transitions 0/85 dead transitions. [2023-09-01 07:21:08,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 85 transitions, 627 flow [2023-09-01 07:21:08,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:21:08,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:21:08,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 892 transitions. [2023-09-01 07:21:08,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5171014492753623 [2023-09-01 07:21:08,922 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 892 transitions. [2023-09-01 07:21:08,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 892 transitions. [2023-09-01 07:21:08,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:21:08,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 892 transitions. [2023-09-01 07:21:08,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.3333333333333) internal successors, (892), 3 states have internal predecessors, (892), 0 states have call successors, (0), 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 07:21:08,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 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 07:21:08,928 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 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 07:21:08,928 INFO L175 Difference]: Start difference. First operand has 63 places, 87 transitions, 467 flow. Second operand 3 states and 892 transitions. [2023-09-01 07:21:08,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 85 transitions, 627 flow [2023-09-01 07:21:08,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 623 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 07:21:08,937 INFO L231 Difference]: Finished difference. Result has 62 places, 85 transitions, 455 flow [2023-09-01 07:21:08,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=455, PETRI_PLACES=62, PETRI_TRANSITIONS=85} [2023-09-01 07:21:08,939 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2023-09-01 07:21:08,939 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 85 transitions, 455 flow [2023-09-01 07:21:08,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 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 07:21:08,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:21:08,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:21:08,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 07:21:08,940 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:21:08,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:21:08,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1226329833, now seen corresponding path program 1 times [2023-09-01 07:21:08,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:21:08,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033397209] [2023-09-01 07:21:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:21:08,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:21:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:21:08,998 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 07:21:08,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:21:08,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033397209] [2023-09-01 07:21:08,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033397209] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:21:08,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:21:08,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 07:21:09,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031801391] [2023-09-01 07:21:09,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:21:09,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 07:21:09,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:21:09,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 07:21:09,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 07:21:09,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 575 [2023-09-01 07:21:09,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 85 transitions, 455 flow. Second operand has 3 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 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 07:21:09,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:21:09,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 575 [2023-09-01 07:21:09,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:21:12,138 INFO L130 PetriNetUnfolder]: 33716/46755 cut-off events. [2023-09-01 07:21:12,138 INFO L131 PetriNetUnfolder]: For 9650/9650 co-relation queries the response was YES. [2023-09-01 07:21:12,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107372 conditions, 46755 events. 33716/46755 cut-off events. For 9650/9650 co-relation queries the response was YES. Maximal size of possible extension queue 1217. Compared 274876 event pairs, 8360 based on Foata normal form. 1474/36038 useless extension candidates. Maximal degree in co-relation 107346. Up to 29107 conditions per place. [2023-09-01 07:21:12,427 INFO L137 encePairwiseOnDemand]: 571/575 looper letters, 102 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-09-01 07:21:12,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 104 transitions, 717 flow [2023-09-01 07:21:12,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 07:21:12,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 07:21:12,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 910 transitions. [2023-09-01 07:21:12,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.527536231884058 [2023-09-01 07:21:12,431 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 910 transitions. [2023-09-01 07:21:12,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 910 transitions. [2023-09-01 07:21:12,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:21:12,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 910 transitions. [2023-09-01 07:21:12,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 303.3333333333333) internal successors, (910), 3 states have internal predecessors, (910), 0 states have call successors, (0), 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 07:21:12,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 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 07:21:12,437 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 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 07:21:12,437 INFO L175 Difference]: Start difference. First operand has 62 places, 85 transitions, 455 flow. Second operand 3 states and 910 transitions. [2023-09-01 07:21:12,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 104 transitions, 717 flow [2023-09-01 07:21:12,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 104 transitions, 716 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 07:21:12,443 INFO L231 Difference]: Finished difference. Result has 64 places, 86 transitions, 468 flow [2023-09-01 07:21:12,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=468, PETRI_PLACES=64, PETRI_TRANSITIONS=86} [2023-09-01 07:21:12,443 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2023-09-01 07:21:12,444 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 86 transitions, 468 flow [2023-09-01 07:21:12,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 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 07:21:12,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:21:12,444 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:21:12,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 07:21:12,445 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:21:12,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:21:12,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1857812366, now seen corresponding path program 1 times [2023-09-01 07:21:12,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:21:12,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418174032] [2023-09-01 07:21:12,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:21:12,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:21:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:21:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:21:12,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:21:12,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418174032] [2023-09-01 07:21:12,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418174032] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:21:12,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:21:12,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 07:21:12,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869454748] [2023-09-01 07:21:12,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:21:12,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 07:21:12,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:21:12,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 07:21:12,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 07:21:12,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 575 [2023-09-01 07:21:12,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 86 transitions, 468 flow. Second operand has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 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 07:21:12,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:21:12,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 575 [2023-09-01 07:21:12,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:21:17,261 INFO L130 PetriNetUnfolder]: 46982/66337 cut-off events. [2023-09-01 07:21:17,261 INFO L131 PetriNetUnfolder]: For 17202/17202 co-relation queries the response was YES. [2023-09-01 07:21:17,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164180 conditions, 66337 events. 46982/66337 cut-off events. For 17202/17202 co-relation queries the response was YES. Maximal size of possible extension queue 1742. Compared 424231 event pairs, 21956 based on Foata normal form. 1100/55752 useless extension candidates. Maximal degree in co-relation 164152. Up to 24786 conditions per place. [2023-09-01 07:21:17,781 INFO L137 encePairwiseOnDemand]: 568/575 looper letters, 151 selfloop transitions, 16 changer transitions 0/167 dead transitions. [2023-09-01 07:21:17,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 167 transitions, 1097 flow [2023-09-01 07:21:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 07:21:17,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 07:21:17,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1730 transitions. [2023-09-01 07:21:17,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014492753623189 [2023-09-01 07:21:17,786 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1730 transitions. [2023-09-01 07:21:17,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1730 transitions. [2023-09-01 07:21:17,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:21:17,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1730 transitions. [2023-09-01 07:21:17,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 288.3333333333333) internal successors, (1730), 6 states have internal predecessors, (1730), 0 states have call successors, (0), 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 07:21:17,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 575.0) internal successors, (4025), 7 states have internal predecessors, (4025), 0 states have call successors, (0), 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 07:21:17,796 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 575.0) internal successors, (4025), 7 states have internal predecessors, (4025), 0 states have call successors, (0), 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 07:21:17,796 INFO L175 Difference]: Start difference. First operand has 64 places, 86 transitions, 468 flow. Second operand 6 states and 1730 transitions. [2023-09-01 07:21:17,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 167 transitions, 1097 flow [2023-09-01 07:21:17,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 167 transitions, 1092 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 07:21:17,803 INFO L231 Difference]: Finished difference. Result has 70 places, 87 transitions, 513 flow [2023-09-01 07:21:17,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=513, PETRI_PLACES=70, PETRI_TRANSITIONS=87} [2023-09-01 07:21:17,804 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 29 predicate places. [2023-09-01 07:21:17,804 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 87 transitions, 513 flow [2023-09-01 07:21:17,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 0 states have call successors, (0), 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 07:21:17,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:21:17,804 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:21:17,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 07:21:17,805 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:21:17,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:21:17,805 INFO L85 PathProgramCache]: Analyzing trace with hash -641973861, now seen corresponding path program 1 times [2023-09-01 07:21:17,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:21:17,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852447609] [2023-09-01 07:21:17,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:21:17,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:21:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:21:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 07:21:17,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:21:17,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852447609] [2023-09-01 07:21:17,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852447609] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:21:17,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:21:17,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 07:21:17,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120804608] [2023-09-01 07:21:17,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:21:17,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 07:21:17,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:21:17,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 07:21:17,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 07:21:18,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 575 [2023-09-01 07:21:18,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 87 transitions, 513 flow. Second operand has 5 states, 5 states have (on average 273.2) internal successors, (1366), 5 states have internal predecessors, (1366), 0 states have call successors, (0), 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 07:21:18,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:21:18,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 575 [2023-09-01 07:21:18,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:21:21,862 INFO L130 PetriNetUnfolder]: 36378/51421 cut-off events. [2023-09-01 07:21:21,863 INFO L131 PetriNetUnfolder]: For 25619/25619 co-relation queries the response was YES. [2023-09-01 07:21:22,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131182 conditions, 51421 events. 36378/51421 cut-off events. For 25619/25619 co-relation queries the response was YES. Maximal size of possible extension queue 1384. Compared 314436 event pairs, 25608 based on Foata normal form. 0/42883 useless extension candidates. Maximal degree in co-relation 131151. Up to 46742 conditions per place. [2023-09-01 07:21:22,170 INFO L137 encePairwiseOnDemand]: 569/575 looper letters, 117 selfloop transitions, 15 changer transitions 2/134 dead transitions. [2023-09-01 07:21:22,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 134 transitions, 966 flow [2023-09-01 07:21:22,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 07:21:22,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 07:21:22,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1700 transitions. [2023-09-01 07:21:22,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4927536231884058 [2023-09-01 07:21:22,176 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1700 transitions. [2023-09-01 07:21:22,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1700 transitions. [2023-09-01 07:21:22,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:21:22,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1700 transitions. [2023-09-01 07:21:22,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 283.3333333333333) internal successors, (1700), 6 states have internal predecessors, (1700), 0 states have call successors, (0), 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 07:21:22,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 575.0) internal successors, (4025), 7 states have internal predecessors, (4025), 0 states have call successors, (0), 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 07:21:22,185 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 575.0) internal successors, (4025), 7 states have internal predecessors, (4025), 0 states have call successors, (0), 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 07:21:22,186 INFO L175 Difference]: Start difference. First operand has 70 places, 87 transitions, 513 flow. Second operand 6 states and 1700 transitions. [2023-09-01 07:21:22,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 134 transitions, 966 flow [2023-09-01 07:21:22,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 134 transitions, 958 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 07:21:22,200 INFO L231 Difference]: Finished difference. Result has 75 places, 87 transitions, 542 flow [2023-09-01 07:21:22,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=542, PETRI_PLACES=75, PETRI_TRANSITIONS=87} [2023-09-01 07:21:22,201 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2023-09-01 07:21:22,201 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 87 transitions, 542 flow [2023-09-01 07:21:22,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 273.2) internal successors, (1366), 5 states have internal predecessors, (1366), 0 states have call successors, (0), 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 07:21:22,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:21:22,202 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:21:22,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 07:21:22,202 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:21:22,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:21:22,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1947325234, now seen corresponding path program 1 times [2023-09-01 07:21:22,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:21:22,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639758064] [2023-09-01 07:21:22,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:21:22,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:21:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:21:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 07:21:22,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:21:22,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639758064] [2023-09-01 07:21:22,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639758064] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:21:22,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547784412] [2023-09-01 07:21:22,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:21:22,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:21:22,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:21:22,308 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 07:21:22,311 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 07:21:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:21:22,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 07:21:22,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:21:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 07:21:22,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:21:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 07:21:22,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547784412] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:21:22,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:21:22,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2023-09-01 07:21:22,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908126706] [2023-09-01 07:21:22,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:21:22,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 07:21:22,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:21:22,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 07:21:22,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-09-01 07:21:23,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 575 [2023-09-01 07:21:23,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 87 transitions, 542 flow. Second operand has 15 states, 15 states have (on average 264.93333333333334) internal successors, (3974), 15 states have internal predecessors, (3974), 0 states have call successors, (0), 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 07:21:23,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:21:23,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 575 [2023-09-01 07:21:23,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:21:35,049 INFO L130 PetriNetUnfolder]: 98528/139790 cut-off events. [2023-09-01 07:21:35,049 INFO L131 PetriNetUnfolder]: For 103682/103682 co-relation queries the response was YES. [2023-09-01 07:21:35,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368791 conditions, 139790 events. 98528/139790 cut-off events. For 103682/103682 co-relation queries the response was YES. Maximal size of possible extension queue 3486. Compared 986911 event pairs, 52371 based on Foata normal form. 4774/131999 useless extension candidates. Maximal degree in co-relation 368758. Up to 37726 conditions per place. [2023-09-01 07:21:36,000 INFO L137 encePairwiseOnDemand]: 564/575 looper letters, 517 selfloop transitions, 41 changer transitions 9/567 dead transitions. [2023-09-01 07:21:36,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 567 transitions, 3715 flow [2023-09-01 07:21:36,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 07:21:36,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 07:21:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 8552 transitions. [2023-09-01 07:21:36,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797755960729313 [2023-09-01 07:21:36,019 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 8552 transitions. [2023-09-01 07:21:36,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 8552 transitions. [2023-09-01 07:21:36,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:21:36,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 8552 transitions. [2023-09-01 07:21:36,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 275.8709677419355) internal successors, (8552), 31 states have internal predecessors, (8552), 0 states have call successors, (0), 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 07:21:36,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 575.0) internal successors, (18400), 32 states have internal predecessors, (18400), 0 states have call successors, (0), 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 07:21:36,072 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 575.0) internal successors, (18400), 32 states have internal predecessors, (18400), 0 states have call successors, (0), 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 07:21:36,073 INFO L175 Difference]: Start difference. First operand has 75 places, 87 transitions, 542 flow. Second operand 31 states and 8552 transitions. [2023-09-01 07:21:36,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 567 transitions, 3715 flow [2023-09-01 07:21:36,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 567 transitions, 3676 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 07:21:36,150 INFO L231 Difference]: Finished difference. Result has 113 places, 108 transitions, 873 flow [2023-09-01 07:21:36,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=873, PETRI_PLACES=113, PETRI_TRANSITIONS=108} [2023-09-01 07:21:36,151 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2023-09-01 07:21:36,151 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 108 transitions, 873 flow [2023-09-01 07:21:36,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 264.93333333333334) internal successors, (3974), 15 states have internal predecessors, (3974), 0 states have call successors, (0), 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 07:21:36,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:21:36,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:21:36,161 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 07:21:36,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:21:36,361 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:21:36,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:21:36,361 INFO L85 PathProgramCache]: Analyzing trace with hash -638479733, now seen corresponding path program 1 times [2023-09-01 07:21:36,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:21:36,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354195749] [2023-09-01 07:21:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:21:36,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:21:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:21:36,472 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 07:21:36,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:21:36,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354195749] [2023-09-01 07:21:36,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354195749] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:21:36,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133359697] [2023-09-01 07:21:36,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:21:36,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:21:36,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:21:36,474 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 07:21:36,476 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 07:21:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:21:36,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 07:21:36,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:21:36,628 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 07:21:36,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 07:21:36,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133359697] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:21:36,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 07:21:36,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2023-09-01 07:21:36,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783742227] [2023-09-01 07:21:36,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:21:36,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 07:21:36,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:21:36,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 07:21:36,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-09-01 07:21:36,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 575 [2023-09-01 07:21:36,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 108 transitions, 873 flow. Second operand has 4 states, 4 states have (on average 274.75) internal successors, (1099), 4 states have internal predecessors, (1099), 0 states have call successors, (0), 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 07:21:36,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:21:36,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 575 [2023-09-01 07:21:36,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:21:48,354 INFO L130 PetriNetUnfolder]: 90102/127866 cut-off events. [2023-09-01 07:21:48,354 INFO L131 PetriNetUnfolder]: For 252637/252637 co-relation queries the response was YES. [2023-09-01 07:21:48,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379350 conditions, 127866 events. 90102/127866 cut-off events. For 252637/252637 co-relation queries the response was YES. Maximal size of possible extension queue 3232. Compared 887417 event pairs, 64625 based on Foata normal form. 1166/118029 useless extension candidates. Maximal degree in co-relation 379305. Up to 119644 conditions per place. [2023-09-01 07:21:49,393 INFO L137 encePairwiseOnDemand]: 568/575 looper letters, 152 selfloop transitions, 16 changer transitions 8/176 dead transitions. [2023-09-01 07:21:49,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 176 transitions, 1540 flow [2023-09-01 07:21:49,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 07:21:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 07:21:49,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1441 transitions. [2023-09-01 07:21:49,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5012173913043478 [2023-09-01 07:21:49,397 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1441 transitions. [2023-09-01 07:21:49,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1441 transitions. [2023-09-01 07:21:49,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:21:49,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1441 transitions. [2023-09-01 07:21:49,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 288.2) internal successors, (1441), 5 states have internal predecessors, (1441), 0 states have call successors, (0), 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 07:21:49,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 575.0) internal successors, (3450), 6 states have internal predecessors, (3450), 0 states have call successors, (0), 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 07:21:49,405 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 575.0) internal successors, (3450), 6 states have internal predecessors, (3450), 0 states have call successors, (0), 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 07:21:49,405 INFO L175 Difference]: Start difference. First operand has 113 places, 108 transitions, 873 flow. Second operand 5 states and 1441 transitions. [2023-09-01 07:21:49,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 176 transitions, 1540 flow [2023-09-01 07:21:50,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 176 transitions, 1505 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-09-01 07:21:50,912 INFO L231 Difference]: Finished difference. Result has 115 places, 118 transitions, 982 flow [2023-09-01 07:21:50,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=982, PETRI_PLACES=115, PETRI_TRANSITIONS=118} [2023-09-01 07:21:50,913 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 74 predicate places. [2023-09-01 07:21:50,913 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 118 transitions, 982 flow [2023-09-01 07:21:50,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 274.75) internal successors, (1099), 4 states have internal predecessors, (1099), 0 states have call successors, (0), 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 07:21:50,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:21:50,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:21:50,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 07:21:51,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 07:21:51,120 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:21:51,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:21:51,120 INFO L85 PathProgramCache]: Analyzing trace with hash 529743478, now seen corresponding path program 1 times [2023-09-01 07:21:51,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:21:51,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857141263] [2023-09-01 07:21:51,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:21:51,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:21:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:21:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 07:21:51,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:21:51,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857141263] [2023-09-01 07:21:51,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857141263] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:21:51,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:21:51,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 07:21:51,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393011567] [2023-09-01 07:21:51,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:21:51,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 07:21:51,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:21:51,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 07:21:51,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 07:21:51,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 575 [2023-09-01 07:21:51,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 118 transitions, 982 flow. Second operand has 5 states, 5 states have (on average 273.4) internal successors, (1367), 5 states have internal predecessors, (1367), 0 states have call successors, (0), 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 07:21:51,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:21:51,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 575 [2023-09-01 07:21:51,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:22:02,240 INFO L130 PetriNetUnfolder]: 85120/121098 cut-off events. [2023-09-01 07:22:02,240 INFO L131 PetriNetUnfolder]: For 236041/236041 co-relation queries the response was YES. [2023-09-01 07:22:02,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367920 conditions, 121098 events. 85120/121098 cut-off events. For 236041/236041 co-relation queries the response was YES. Maximal size of possible extension queue 3143. Compared 857695 event pairs, 25883 based on Foata normal form. 480/111338 useless extension candidates. Maximal degree in co-relation 367873. Up to 67681 conditions per place. [2023-09-01 07:22:03,318 INFO L137 encePairwiseOnDemand]: 570/575 looper letters, 132 selfloop transitions, 32 changer transitions 2/166 dead transitions. [2023-09-01 07:22:03,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 166 transitions, 1512 flow [2023-09-01 07:22:03,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 07:22:03,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 07:22:03,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1429 transitions. [2023-09-01 07:22:03,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4970434782608696 [2023-09-01 07:22:03,322 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1429 transitions. [2023-09-01 07:22:03,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1429 transitions. [2023-09-01 07:22:03,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:22:03,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1429 transitions. [2023-09-01 07:22:03,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 285.8) internal successors, (1429), 5 states have internal predecessors, (1429), 0 states have call successors, (0), 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 07:22:03,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 575.0) internal successors, (3450), 6 states have internal predecessors, (3450), 0 states have call successors, (0), 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 07:22:03,328 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 575.0) internal successors, (3450), 6 states have internal predecessors, (3450), 0 states have call successors, (0), 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 07:22:03,328 INFO L175 Difference]: Start difference. First operand has 115 places, 118 transitions, 982 flow. Second operand 5 states and 1429 transitions. [2023-09-01 07:22:03,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 166 transitions, 1512 flow [2023-09-01 07:22:09,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 166 transitions, 1503 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-09-01 07:22:09,409 INFO L231 Difference]: Finished difference. Result has 117 places, 119 transitions, 1071 flow [2023-09-01 07:22:09,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=973, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1071, PETRI_PLACES=117, PETRI_TRANSITIONS=119} [2023-09-01 07:22:09,410 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 76 predicate places. [2023-09-01 07:22:09,410 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 119 transitions, 1071 flow [2023-09-01 07:22:09,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 273.4) internal successors, (1367), 5 states have internal predecessors, (1367), 0 states have call successors, (0), 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 07:22:09,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:22:09,411 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:22:09,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 07:22:09,411 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:22:09,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:22:09,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1451452051, now seen corresponding path program 1 times [2023-09-01 07:22:09,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:22:09,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970050647] [2023-09-01 07:22:09,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:22:09,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:22:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:22:09,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:22:09,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:22:09,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970050647] [2023-09-01 07:22:09,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970050647] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:22:09,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:22:09,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 07:22:09,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129805265] [2023-09-01 07:22:09,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:22:09,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 07:22:09,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:22:09,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 07:22:09,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 07:22:09,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 575 [2023-09-01 07:22:09,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 119 transitions, 1071 flow. Second operand has 5 states, 5 states have (on average 273.4) internal successors, (1367), 5 states have internal predecessors, (1367), 0 states have call successors, (0), 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 07:22:09,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:22:09,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 575 [2023-09-01 07:22:09,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:22:20,431 INFO L130 PetriNetUnfolder]: 82652/117610 cut-off events. [2023-09-01 07:22:20,432 INFO L131 PetriNetUnfolder]: For 249567/249567 co-relation queries the response was YES. [2023-09-01 07:22:21,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359549 conditions, 117610 events. 82652/117610 cut-off events. For 249567/249567 co-relation queries the response was YES. Maximal size of possible extension queue 3123. Compared 818074 event pairs, 59403 based on Foata normal form. 196/107792 useless extension candidates. Maximal degree in co-relation 359502. Up to 116227 conditions per place. [2023-09-01 07:22:21,363 INFO L137 encePairwiseOnDemand]: 570/575 looper letters, 100 selfloop transitions, 31 changer transitions 9/140 dead transitions. [2023-09-01 07:22:21,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 140 transitions, 1436 flow [2023-09-01 07:22:21,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 07:22:21,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 07:22:21,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1408 transitions. [2023-09-01 07:22:21,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897391304347826 [2023-09-01 07:22:21,366 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1408 transitions. [2023-09-01 07:22:21,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1408 transitions. [2023-09-01 07:22:21,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:22:21,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1408 transitions. [2023-09-01 07:22:21,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 281.6) internal successors, (1408), 5 states have internal predecessors, (1408), 0 states have call successors, (0), 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 07:22:21,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 575.0) internal successors, (3450), 6 states have internal predecessors, (3450), 0 states have call successors, (0), 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 07:22:21,371 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 575.0) internal successors, (3450), 6 states have internal predecessors, (3450), 0 states have call successors, (0), 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 07:22:21,371 INFO L175 Difference]: Start difference. First operand has 117 places, 119 transitions, 1071 flow. Second operand 5 states and 1408 transitions. [2023-09-01 07:22:21,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 140 transitions, 1436 flow [2023-09-01 07:22:22,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 140 transitions, 1381 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-09-01 07:22:22,459 INFO L231 Difference]: Finished difference. Result has 119 places, 119 transitions, 1081 flow [2023-09-01 07:22:22,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1081, PETRI_PLACES=119, PETRI_TRANSITIONS=119} [2023-09-01 07:22:22,462 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2023-09-01 07:22:22,462 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 119 transitions, 1081 flow [2023-09-01 07:22:22,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 273.4) internal successors, (1367), 5 states have internal predecessors, (1367), 0 states have call successors, (0), 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 07:22:22,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:22:22,463 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:22:22,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 07:22:22,463 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:22:22,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:22:22,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1427924327, now seen corresponding path program 2 times [2023-09-01 07:22:22,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:22:22,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295727060] [2023-09-01 07:22:22,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:22:22,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:22:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:22:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 07:22:22,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:22:22,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295727060] [2023-09-01 07:22:22,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295727060] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:22:22,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496502099] [2023-09-01 07:22:22,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 07:22:22,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:22:22,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:22:22,536 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 07:22:22,539 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 07:22:22,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 07:22:22,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:22:22,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 07:22:22,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:22:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 07:22:22,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:22:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 07:22:22,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496502099] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:22:22,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:22:22,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-09-01 07:22:22,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256825969] [2023-09-01 07:22:22,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:22:22,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 07:22:22,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:22:22,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 07:22:22,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 07:22:22,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 575 [2023-09-01 07:22:22,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 119 transitions, 1081 flow. Second operand has 6 states, 6 states have (on average 286.6666666666667) internal successors, (1720), 6 states have internal predecessors, (1720), 0 states have call successors, (0), 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 07:22:22,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:22:22,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 575 [2023-09-01 07:22:22,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:22:35,992 INFO L130 PetriNetUnfolder]: 98806/140004 cut-off events. [2023-09-01 07:22:35,992 INFO L131 PetriNetUnfolder]: For 325190/325190 co-relation queries the response was YES. [2023-09-01 07:22:36,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438047 conditions, 140004 events. 98806/140004 cut-off events. For 325190/325190 co-relation queries the response was YES. Maximal size of possible extension queue 3430. Compared 979147 event pairs, 32403 based on Foata normal form. 0/129284 useless extension candidates. Maximal degree in co-relation 438000. Up to 65674 conditions per place. [2023-09-01 07:22:37,209 INFO L137 encePairwiseOnDemand]: 571/575 looper letters, 178 selfloop transitions, 8 changer transitions 1/187 dead transitions. [2023-09-01 07:22:37,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 187 transitions, 1744 flow [2023-09-01 07:22:37,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 07:22:37,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 07:22:37,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1796 transitions. [2023-09-01 07:22:37,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5205797101449275 [2023-09-01 07:22:37,211 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1796 transitions. [2023-09-01 07:22:37,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1796 transitions. [2023-09-01 07:22:37,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:22:37,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1796 transitions. [2023-09-01 07:22:37,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 299.3333333333333) internal successors, (1796), 6 states have internal predecessors, (1796), 0 states have call successors, (0), 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 07:22:37,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 575.0) internal successors, (4025), 7 states have internal predecessors, (4025), 0 states have call successors, (0), 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 07:22:37,216 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 575.0) internal successors, (4025), 7 states have internal predecessors, (4025), 0 states have call successors, (0), 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 07:22:37,216 INFO L175 Difference]: Start difference. First operand has 119 places, 119 transitions, 1081 flow. Second operand 6 states and 1796 transitions. [2023-09-01 07:22:37,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 187 transitions, 1744 flow [2023-09-01 07:22:38,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 187 transitions, 1683 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 07:22:38,211 INFO L231 Difference]: Finished difference. Result has 121 places, 119 transitions, 1047 flow [2023-09-01 07:22:38,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1047, PETRI_PLACES=121, PETRI_TRANSITIONS=119} [2023-09-01 07:22:38,211 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 80 predicate places. [2023-09-01 07:22:38,211 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 119 transitions, 1047 flow [2023-09-01 07:22:38,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 286.6666666666667) internal successors, (1720), 6 states have internal predecessors, (1720), 0 states have call successors, (0), 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 07:22:38,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:22:38,212 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-09-01 07:22:38,219 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 07:22:38,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 07:22:38,418 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:22:38,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:22:38,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1987002672, now seen corresponding path program 2 times [2023-09-01 07:22:38,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:22:38,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134658488] [2023-09-01 07:22:38,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:22:38,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:22:38,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:22:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:22:38,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:22:38,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134658488] [2023-09-01 07:22:38,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134658488] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:22:38,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666605510] [2023-09-01 07:22:38,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 07:22:38,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:22:38,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:22:38,591 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 07:22:38,595 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 07:22:38,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 07:22:38,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 07:22:38,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 07:22:38,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:22:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 07:22:38,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 07:22:38,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666605510] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:22:38,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 07:22:38,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2023-09-01 07:22:38,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501681041] [2023-09-01 07:22:38,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:22:38,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 07:22:38,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:22:38,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 07:22:38,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2023-09-01 07:22:38,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 575 [2023-09-01 07:22:38,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 119 transitions, 1047 flow. Second operand has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 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 07:22:38,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:22:38,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 575 [2023-09-01 07:22:38,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:22:52,626 INFO L130 PetriNetUnfolder]: 97955/138457 cut-off events. [2023-09-01 07:22:52,626 INFO L131 PetriNetUnfolder]: For 373286/373286 co-relation queries the response was YES. [2023-09-01 07:22:53,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447344 conditions, 138457 events. 97955/138457 cut-off events. For 373286/373286 co-relation queries the response was YES. Maximal size of possible extension queue 3405. Compared 967850 event pairs, 70470 based on Foata normal form. 3/127740 useless extension candidates. Maximal degree in co-relation 447296. Up to 138401 conditions per place. [2023-09-01 07:22:53,837 INFO L137 encePairwiseOnDemand]: 572/575 looper letters, 91 selfloop transitions, 25 changer transitions 0/116 dead transitions. [2023-09-01 07:22:53,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 116 transitions, 1204 flow [2023-09-01 07:22:53,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 07:22:53,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 07:22:53,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1152 transitions. [2023-09-01 07:22:53,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5008695652173913 [2023-09-01 07:22:53,839 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1152 transitions. [2023-09-01 07:22:53,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1152 transitions. [2023-09-01 07:22:53,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:22:53,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1152 transitions. [2023-09-01 07:22:53,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 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 07:22:53,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 575.0) internal successors, (2875), 5 states have internal predecessors, (2875), 0 states have call successors, (0), 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 07:22:53,842 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 575.0) internal successors, (2875), 5 states have internal predecessors, (2875), 0 states have call successors, (0), 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 07:22:53,842 INFO L175 Difference]: Start difference. First operand has 121 places, 119 transitions, 1047 flow. Second operand 4 states and 1152 transitions. [2023-09-01 07:22:53,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 116 transitions, 1204 flow [2023-09-01 07:22:55,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 116 transitions, 1165 flow, removed 11 selfloop flow, removed 5 redundant places. [2023-09-01 07:22:55,319 INFO L231 Difference]: Finished difference. Result has 116 places, 116 transitions, 983 flow [2023-09-01 07:22:55,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=983, PETRI_PLACES=116, PETRI_TRANSITIONS=116} [2023-09-01 07:22:55,320 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2023-09-01 07:22:55,320 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 116 transitions, 983 flow [2023-09-01 07:22:55,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 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 07:22:55,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:22:55,320 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:22:55,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 07:22:55,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:22:55,521 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:22:55,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:22:55,522 INFO L85 PathProgramCache]: Analyzing trace with hash 941464443, now seen corresponding path program 1 times [2023-09-01 07:22:55,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:22:55,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994680303] [2023-09-01 07:22:55,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:22:55,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:22:55,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:22:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 07:22:55,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:22:55,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994680303] [2023-09-01 07:22:55,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994680303] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:22:55,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016060321] [2023-09-01 07:22:55,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:22:55,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:22:55,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:22:55,625 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 07:22:55,633 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 07:22:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:22:55,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 07:22:55,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:22:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 07:22:55,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:22:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 07:22:55,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016060321] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:22:55,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:22:55,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-09-01 07:22:55,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726124262] [2023-09-01 07:22:55,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:22:55,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 07:22:55,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:22:55,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 07:22:55,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-09-01 07:22:56,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 575 [2023-09-01 07:22:56,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 116 transitions, 983 flow. Second operand has 16 states, 16 states have (on average 265.125) internal successors, (4242), 16 states have internal predecessors, (4242), 0 states have call successors, (0), 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 07:22:56,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:22:56,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 575 [2023-09-01 07:22:56,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:23:07,308 INFO L130 PetriNetUnfolder]: 82459/118107 cut-off events. [2023-09-01 07:23:07,308 INFO L131 PetriNetUnfolder]: For 223774/223774 co-relation queries the response was YES. [2023-09-01 07:23:07,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344029 conditions, 118107 events. 82459/118107 cut-off events. For 223774/223774 co-relation queries the response was YES. Maximal size of possible extension queue 2920. Compared 845412 event pairs, 28878 based on Foata normal form. 2534/112833 useless extension candidates. Maximal degree in co-relation 343984. Up to 44118 conditions per place. [2023-09-01 07:23:08,268 INFO L137 encePairwiseOnDemand]: 565/575 looper letters, 251 selfloop transitions, 66 changer transitions 8/325 dead transitions. [2023-09-01 07:23:08,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 325 transitions, 2542 flow [2023-09-01 07:23:08,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 07:23:08,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 07:23:08,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 6267 transitions. [2023-09-01 07:23:08,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47387523629489603 [2023-09-01 07:23:08,276 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 6267 transitions. [2023-09-01 07:23:08,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 6267 transitions. [2023-09-01 07:23:08,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:23:08,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 6267 transitions. [2023-09-01 07:23:08,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 272.4782608695652) internal successors, (6267), 23 states have internal predecessors, (6267), 0 states have call successors, (0), 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 07:23:08,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 575.0) internal successors, (13800), 24 states have internal predecessors, (13800), 0 states have call successors, (0), 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 07:23:08,292 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 575.0) internal successors, (13800), 24 states have internal predecessors, (13800), 0 states have call successors, (0), 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 07:23:08,292 INFO L175 Difference]: Start difference. First operand has 116 places, 116 transitions, 983 flow. Second operand 23 states and 6267 transitions. [2023-09-01 07:23:08,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 325 transitions, 2542 flow [2023-09-01 07:23:08,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 325 transitions, 2516 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 07:23:08,548 INFO L231 Difference]: Finished difference. Result has 145 places, 126 transitions, 1220 flow [2023-09-01 07:23:08,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1220, PETRI_PLACES=145, PETRI_TRANSITIONS=126} [2023-09-01 07:23:08,549 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2023-09-01 07:23:08,549 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 126 transitions, 1220 flow [2023-09-01 07:23:08,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 265.125) internal successors, (4242), 16 states have internal predecessors, (4242), 0 states have call successors, (0), 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 07:23:08,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:23:08,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:23:08,555 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 07:23:08,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:23:08,750 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:23:08,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:23:08,751 INFO L85 PathProgramCache]: Analyzing trace with hash 2124159858, now seen corresponding path program 1 times [2023-09-01 07:23:08,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:23:08,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19013627] [2023-09-01 07:23:08,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:23:08,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:23:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:23:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 07:23:08,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:23:08,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19013627] [2023-09-01 07:23:08,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19013627] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 07:23:08,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 07:23:08,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 07:23:08,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343334382] [2023-09-01 07:23:08,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 07:23:08,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 07:23:08,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:23:08,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 07:23:08,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 07:23:08,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 575 [2023-09-01 07:23:08,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 126 transitions, 1220 flow. Second operand has 4 states, 4 states have (on average 289.25) internal successors, (1157), 4 states have internal predecessors, (1157), 0 states have call successors, (0), 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 07:23:08,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:23:08,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 575 [2023-09-01 07:23:08,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:23:19,320 INFO L130 PetriNetUnfolder]: 70087/100663 cut-off events. [2023-09-01 07:23:19,320 INFO L131 PetriNetUnfolder]: For 355311/355311 co-relation queries the response was YES. [2023-09-01 07:23:19,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337671 conditions, 100663 events. 70087/100663 cut-off events. For 355311/355311 co-relation queries the response was YES. Maximal size of possible extension queue 2497. Compared 705900 event pairs, 23970 based on Foata normal form. 0/98323 useless extension candidates. Maximal degree in co-relation 337617. Up to 52290 conditions per place. [2023-09-01 07:23:20,216 INFO L137 encePairwiseOnDemand]: 572/575 looper letters, 141 selfloop transitions, 2 changer transitions 7/150 dead transitions. [2023-09-01 07:23:20,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 150 transitions, 1644 flow [2023-09-01 07:23:20,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 07:23:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 07:23:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1191 transitions. [2023-09-01 07:23:20,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178260869565218 [2023-09-01 07:23:20,218 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1191 transitions. [2023-09-01 07:23:20,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1191 transitions. [2023-09-01 07:23:20,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:23:20,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1191 transitions. [2023-09-01 07:23:20,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 297.75) internal successors, (1191), 4 states have internal predecessors, (1191), 0 states have call successors, (0), 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 07:23:20,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 575.0) internal successors, (2875), 5 states have internal predecessors, (2875), 0 states have call successors, (0), 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 07:23:20,222 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 575.0) internal successors, (2875), 5 states have internal predecessors, (2875), 0 states have call successors, (0), 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 07:23:20,222 INFO L175 Difference]: Start difference. First operand has 145 places, 126 transitions, 1220 flow. Second operand 4 states and 1191 transitions. [2023-09-01 07:23:20,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 150 transitions, 1644 flow [2023-09-01 07:23:22,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 150 transitions, 1475 flow, removed 24 selfloop flow, removed 12 redundant places. [2023-09-01 07:23:22,528 INFO L231 Difference]: Finished difference. Result has 135 places, 120 transitions, 1023 flow [2023-09-01 07:23:22,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1023, PETRI_PLACES=135, PETRI_TRANSITIONS=120} [2023-09-01 07:23:22,529 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2023-09-01 07:23:22,529 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 120 transitions, 1023 flow [2023-09-01 07:23:22,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 289.25) internal successors, (1157), 4 states have internal predecessors, (1157), 0 states have call successors, (0), 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 07:23:22,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:23:22,530 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-09-01 07:23:22,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-09-01 07:23:22,530 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:23:22,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:23:22,530 INFO L85 PathProgramCache]: Analyzing trace with hash -663508963, now seen corresponding path program 1 times [2023-09-01 07:23:22,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:23:22,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379641681] [2023-09-01 07:23:22,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:23:22,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:23:22,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:23:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:23:22,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:23:22,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379641681] [2023-09-01 07:23:22,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379641681] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:23:22,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554388780] [2023-09-01 07:23:22,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:23:22,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:23:22,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:23:22,701 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 07:23:22,703 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 07:23:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:23:22,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 07:23:22,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:23:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:23:22,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:23:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 07:23:23,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554388780] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:23:23,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:23:23,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-09-01 07:23:23,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586256270] [2023-09-01 07:23:23,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:23:23,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 07:23:23,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:23:23,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 07:23:23,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-09-01 07:23:23,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 575 [2023-09-01 07:23:23,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 120 transitions, 1023 flow. Second operand has 25 states, 25 states have (on average 280.12) internal successors, (7003), 25 states have internal predecessors, (7003), 0 states have call successors, (0), 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 07:23:23,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:23:23,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 575 [2023-09-01 07:23:23,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 07:23:46,432 INFO L130 PetriNetUnfolder]: 152406/218381 cut-off events. [2023-09-01 07:23:46,432 INFO L131 PetriNetUnfolder]: For 924393/924393 co-relation queries the response was YES. [2023-09-01 07:23:47,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748832 conditions, 218381 events. 152406/218381 cut-off events. For 924393/924393 co-relation queries the response was YES. Maximal size of possible extension queue 3158. Compared 1584486 event pairs, 110439 based on Foata normal form. 108/213029 useless extension candidates. Maximal degree in co-relation 748783. Up to 34062 conditions per place. [2023-09-01 07:23:48,288 INFO L137 encePairwiseOnDemand]: 568/575 looper letters, 684 selfloop transitions, 148 changer transitions 0/832 dead transitions. [2023-09-01 07:23:48,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 832 transitions, 6687 flow [2023-09-01 07:23:48,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 07:23:48,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 07:23:48,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 7308 transitions. [2023-09-01 07:23:48,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295652173913044 [2023-09-01 07:23:48,293 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 7308 transitions. [2023-09-01 07:23:48,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 7308 transitions. [2023-09-01 07:23:48,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 07:23:48,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 7308 transitions. [2023-09-01 07:23:48,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 304.5) internal successors, (7308), 24 states have internal predecessors, (7308), 0 states have call successors, (0), 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 07:23:48,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 575.0) internal successors, (14375), 25 states have internal predecessors, (14375), 0 states have call successors, (0), 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 07:23:48,308 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 575.0) internal successors, (14375), 25 states have internal predecessors, (14375), 0 states have call successors, (0), 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 07:23:48,308 INFO L175 Difference]: Start difference. First operand has 135 places, 120 transitions, 1023 flow. Second operand 24 states and 7308 transitions. [2023-09-01 07:23:48,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 832 transitions, 6687 flow [2023-09-01 07:24:22,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 832 transitions, 6404 flow, removed 126 selfloop flow, removed 8 redundant places. [2023-09-01 07:24:22,921 INFO L231 Difference]: Finished difference. Result has 157 places, 192 transitions, 2130 flow [2023-09-01 07:24:22,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=1000, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2130, PETRI_PLACES=157, PETRI_TRANSITIONS=192} [2023-09-01 07:24:22,921 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2023-09-01 07:24:22,922 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 192 transitions, 2130 flow [2023-09-01 07:24:22,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 280.12) internal successors, (7003), 25 states have internal predecessors, (7003), 0 states have call successors, (0), 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 07:24:22,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 07:24:22,923 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 07:24:22,927 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 07:24:23,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:24:23,124 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 07:24:23,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 07:24:23,125 INFO L85 PathProgramCache]: Analyzing trace with hash 429139500, now seen corresponding path program 1 times [2023-09-01 07:24:23,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 07:24:23,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869499339] [2023-09-01 07:24:23,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:24:23,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 07:24:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:24:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 07:24:23,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 07:24:23,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869499339] [2023-09-01 07:24:23,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869499339] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 07:24:23,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025125821] [2023-09-01 07:24:23,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 07:24:23,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 07:24:23,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 07:24:23,189 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 07:24:23,194 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 07:24:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 07:24:23,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 07:24:23,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 07:24:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 07:24:23,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 07:24:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 07:24:23,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025125821] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 07:24:23,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 07:24:23,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-09-01 07:24:23,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253206954] [2023-09-01 07:24:23,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 07:24:23,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 07:24:23,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 07:24:23,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 07:24:23,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 07:24:23,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 575 [2023-09-01 07:24:23,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 192 transitions, 2130 flow. Second operand has 7 states, 7 states have (on average 291.42857142857144) internal successors, (2040), 7 states have internal predecessors, (2040), 0 states have call successors, (0), 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 07:24:23,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 07:24:23,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 575 [2023-09-01 07:24:23,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand