./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-send-receive.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/popl20-send-receive.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 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 --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 08:32:53,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 08:32:53,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 08:32:53,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 08:32:53,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 08:32:53,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 08:32:53,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 08:32:53,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 08:32:53,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 08:32:53,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 08:32:53,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 08:32:53,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 08:32:53,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 08:32:53,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 08:32:53,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 08:32:53,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 08:32:53,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 08:32:53,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 08:32:53,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 08:32:53,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 08:32:53,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 08:32:53,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 08:32:53,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 08:32:53,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 08:32:53,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 08:32:53,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 08:32:53,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 08:32:53,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 08:32:53,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 08:32:53,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 08:32:53,727 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 08:32:53,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 08:32:53,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 08:32:53,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 08:32:53,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 08:32:53,732 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 08:32:53,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 08:32:53,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 08:32:53,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 08:32:53,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 08:32:53,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 08:32:53,736 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 08:32:53,769 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 08:32:53,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 08:32:53,770 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 08:32:53,771 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 08:32:53,771 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 08:32:53,772 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 08:32:53,772 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 08:32:53,772 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 08:32:53,773 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 08:32:53,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 08:32:53,774 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 08:32:53,774 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 08:32:53,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 08:32:53,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 08:32:53,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 08:32:53,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 08:32:53,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 08:32:53,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 08:32:53,775 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 08:32:53,775 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 08:32:53,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 08:32:53,776 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 08:32:53,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 08:32:53,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 08:32:53,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 08:32:53,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 08:32:53,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:32:53,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 08:32:53,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 08:32:53,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 08:32:53,778 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 08:32:53,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 08:32:53,778 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 08:32:53,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 08:32:53,779 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 08:32:53,779 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 08:32:53,779 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 08:32:53,779 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 08:32:54,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 08:32:54,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 08:32:54,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 08:32:54,111 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 08:32:54,112 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 08:32:54,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c [2023-09-01 08:32:55,376 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 08:32:55,596 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 08:32:55,596 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c [2023-09-01 08:32:55,602 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e54d8b42/4321044f666b46ec8c0f5232d757ab4e/FLAGf2c11fa69 [2023-09-01 08:32:55,615 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e54d8b42/4321044f666b46ec8c0f5232d757ab4e [2023-09-01 08:32:55,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 08:32:55,618 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 08:32:55,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 08:32:55,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 08:32:55,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 08:32:55,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:32:55" (1/1) ... [2023-09-01 08:32:55,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f76bfd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:55, skipping insertion in model container [2023-09-01 08:32:55,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:32:55" (1/1) ... [2023-09-01 08:32:55,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 08:32:55,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 08:32:55,816 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/popl20-send-receive.wvr.c[3107,3120] [2023-09-01 08:32:55,824 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:32:55,836 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 08:32:55,873 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/popl20-send-receive.wvr.c[3107,3120] [2023-09-01 08:32:55,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:32:55,895 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:32:55,896 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:32:55,902 INFO L208 MainTranslator]: Completed translation [2023-09-01 08:32:55,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:55 WrapperNode [2023-09-01 08:32:55,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 08:32:55,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 08:32:55,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 08:32:55,905 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 08:32:55,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:55" (1/1) ... [2023-09-01 08:32:55,927 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:55" (1/1) ... [2023-09-01 08:32:55,958 INFO L138 Inliner]: procedures = 25, calls = 52, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 174 [2023-09-01 08:32:55,959 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 08:32:55,960 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 08:32:55,960 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 08:32:55,960 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 08:32:55,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:55" (1/1) ... [2023-09-01 08:32:55,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:55" (1/1) ... [2023-09-01 08:32:55,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:55" (1/1) ... [2023-09-01 08:32:55,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:55" (1/1) ... [2023-09-01 08:32:55,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:55" (1/1) ... [2023-09-01 08:32:56,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:55" (1/1) ... [2023-09-01 08:32:56,004 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:55" (1/1) ... [2023-09-01 08:32:56,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:55" (1/1) ... [2023-09-01 08:32:56,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 08:32:56,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 08:32:56,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 08:32:56,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 08:32:56,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:55" (1/1) ... [2023-09-01 08:32:56,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:32:56,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:32:56,048 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 08:32:56,057 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 08:32:56,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 08:32:56,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 08:32:56,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 08:32:56,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 08:32:56,082 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 08:32:56,082 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 08:32:56,082 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 08:32:56,082 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 08:32:56,082 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 08:32:56,082 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 08:32:56,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 08:32:56,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 08:32:56,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 08:32:56,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 08:32:56,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 08:32:56,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 08:32:56,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 08:32:56,085 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 08:32:56,232 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 08:32:56,244 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 08:32:56,580 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 08:32:56,801 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 08:32:56,801 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 08:32:56,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:32:56 BoogieIcfgContainer [2023-09-01 08:32:56,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 08:32:56,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 08:32:56,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 08:32:56,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 08:32:56,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 08:32:55" (1/3) ... [2023-09-01 08:32:56,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2865c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:32:56, skipping insertion in model container [2023-09-01 08:32:56,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:32:55" (2/3) ... [2023-09-01 08:32:56,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2865c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:32:56, skipping insertion in model container [2023-09-01 08:32:56,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:32:56" (3/3) ... [2023-09-01 08:32:56,813 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2023-09-01 08:32:56,820 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 08:32:56,828 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 08:32:56,829 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-09-01 08:32:56,829 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 08:32:56,897 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 08:32:56,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 146 transitions, 316 flow [2023-09-01 08:32:57,033 INFO L130 PetriNetUnfolder]: 10/143 cut-off events. [2023-09-01 08:32:57,034 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 08:32:57,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 143 events. 10/143 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 142 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 122. Up to 2 conditions per place. [2023-09-01 08:32:57,039 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 146 transitions, 316 flow [2023-09-01 08:32:57,047 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 128 transitions, 268 flow [2023-09-01 08:32:57,050 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 08:32:57,064 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 128 transitions, 268 flow [2023-09-01 08:32:57,066 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 128 transitions, 268 flow [2023-09-01 08:32:57,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 128 transitions, 268 flow [2023-09-01 08:32:57,089 INFO L130 PetriNetUnfolder]: 10/128 cut-off events. [2023-09-01 08:32:57,090 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 08:32:57,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 128 events. 10/128 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 142 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 122. Up to 2 conditions per place. [2023-09-01 08:32:57,096 INFO L119 LiptonReduction]: Number of co-enabled transitions 1764 [2023-09-01 08:33:02,482 INFO L134 LiptonReduction]: Checked pairs total: 2655 [2023-09-01 08:33:02,482 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-09-01 08:33:02,506 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 08:33:02,513 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;@d8324c9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 08:33:02,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-09-01 08:33:02,519 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 08:33:02,519 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 08:33:02,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:02,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 08:33:02,521 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:33:02,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:02,527 INFO L85 PathProgramCache]: Analyzing trace with hash 20429, now seen corresponding path program 1 times [2023-09-01 08:33:02,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:02,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462400438] [2023-09-01 08:33:02,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:02,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:02,851 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 08:33:02,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:02,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462400438] [2023-09-01 08:33:02,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462400438] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:33:02,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:33:02,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:33:02,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289507845] [2023-09-01 08:33:02,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:33:02,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:33:02,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:02,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:33:02,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:33:02,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 273 [2023-09-01 08:33:02,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 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 08:33:02,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:02,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 273 [2023-09-01 08:33:02,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:03,182 INFO L130 PetriNetUnfolder]: 845/1357 cut-off events. [2023-09-01 08:33:03,183 INFO L131 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2023-09-01 08:33:03,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2875 conditions, 1357 events. 845/1357 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 7731 event pairs, 806 based on Foata normal form. 0/808 useless extension candidates. Maximal degree in co-relation 1300. Up to 661 conditions per place. [2023-09-01 08:33:03,194 INFO L137 encePairwiseOnDemand]: 266/273 looper letters, 43 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-09-01 08:33:03,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 48 transitions, 210 flow [2023-09-01 08:33:03,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:33:03,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:33:03,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 410 transitions. [2023-09-01 08:33:03,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5006105006105006 [2023-09-01 08:33:03,208 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 410 transitions. [2023-09-01 08:33:03,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 410 transitions. [2023-09-01 08:33:03,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:03,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 410 transitions. [2023-09-01 08:33:03,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 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 08:33:03,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 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 08:33:03,221 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 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 08:33:03,223 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 72 flow. Second operand 3 states and 410 transitions. [2023-09-01 08:33:03,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 48 transitions, 210 flow [2023-09-01 08:33:03,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 48 transitions, 198 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 08:33:03,230 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 74 flow [2023-09-01 08:33:03,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-09-01 08:33:03,234 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2023-09-01 08:33:03,235 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 74 flow [2023-09-01 08:33:03,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 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 08:33:03,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:03,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 08:33:03,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 08:33:03,236 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:33:03,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:03,237 INFO L85 PathProgramCache]: Analyzing trace with hash 634105, now seen corresponding path program 1 times [2023-09-01 08:33:03,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:03,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899318497] [2023-09-01 08:33:03,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:03,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:03,299 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 08:33:03,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:03,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899318497] [2023-09-01 08:33:03,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899318497] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:03,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429356751] [2023-09-01 08:33:03,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:03,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:03,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:03,313 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 08:33:03,350 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 08:33:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:03,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:33:03,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:03,466 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 08:33:03,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:33:03,497 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 08:33:03,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429356751] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:33:03,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:33:03,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-09-01 08:33:03,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488961048] [2023-09-01 08:33:03,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:33:03,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:33:03,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:03,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:33:03,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 08:33:03,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 273 [2023-09-01 08:33:03,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 74 flow. Second operand has 7 states, 7 states have (on average 120.14285714285714) internal successors, (841), 7 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 08:33:03,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:03,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 273 [2023-09-01 08:33:03,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:04,046 INFO L130 PetriNetUnfolder]: 2114/3391 cut-off events. [2023-09-01 08:33:04,046 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 08:33:04,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7123 conditions, 3391 events. 2114/3391 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 22224 event pairs, 2015 based on Foata normal form. 0/2025 useless extension candidates. Maximal degree in co-relation 5695. Up to 660 conditions per place. [2023-09-01 08:33:04,069 INFO L137 encePairwiseOnDemand]: 269/273 looper letters, 102 selfloop transitions, 9 changer transitions 0/114 dead transitions. [2023-09-01 08:33:04,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 114 transitions, 504 flow [2023-09-01 08:33:04,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 08:33:04,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 08:33:04,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 947 transitions. [2023-09-01 08:33:04,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4955520669806384 [2023-09-01 08:33:04,095 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 947 transitions. [2023-09-01 08:33:04,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 947 transitions. [2023-09-01 08:33:04,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:04,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 947 transitions. [2023-09-01 08:33:04,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 135.28571428571428) internal successors, (947), 7 states have internal predecessors, (947), 0 states have call successors, (0), 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 08:33:04,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 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 08:33:04,104 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 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 08:33:04,104 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 74 flow. Second operand 7 states and 947 transitions. [2023-09-01 08:33:04,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 114 transitions, 504 flow [2023-09-01 08:33:04,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 114 transitions, 502 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:33:04,107 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 131 flow [2023-09-01 08:33:04,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=131, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2023-09-01 08:33:04,108 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-09-01 08:33:04,108 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 131 flow [2023-09-01 08:33:04,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.14285714285714) internal successors, (841), 7 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 08:33:04,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:04,109 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-09-01 08:33:04,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 08:33:04,320 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 08:33:04,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:33:04,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:04,321 INFO L85 PathProgramCache]: Analyzing trace with hash 19658062, now seen corresponding path program 1 times [2023-09-01 08:33:04,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:04,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979640982] [2023-09-01 08:33:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:04,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:04,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:04,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979640982] [2023-09-01 08:33:04,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979640982] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:04,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43030675] [2023-09-01 08:33:04,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:04,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:04,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:04,436 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 08:33:04,459 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 08:33:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:04,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 08:33:04,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:04,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:33:04,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43030675] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:33:04,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:33:04,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-09-01 08:33:04,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593006381] [2023-09-01 08:33:04,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:33:04,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 08:33:04,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:04,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 08:33:04,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 08:33:04,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 273 [2023-09-01 08:33:04,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 131 flow. Second operand has 5 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 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 08:33:04,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:04,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 273 [2023-09-01 08:33:04,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:05,001 INFO L130 PetriNetUnfolder]: 2111/3387 cut-off events. [2023-09-01 08:33:05,002 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-09-01 08:33:05,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7125 conditions, 3387 events. 2111/3387 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 22515 event pairs, 2015 based on Foata normal form. 2/2028 useless extension candidates. Maximal degree in co-relation 4265. Up to 1973 conditions per place. [2023-09-01 08:33:05,025 INFO L137 encePairwiseOnDemand]: 270/273 looper letters, 64 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2023-09-01 08:33:05,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 70 transitions, 330 flow [2023-09-01 08:33:05,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 08:33:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 08:33:05,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 662 transitions. [2023-09-01 08:33:05,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484981684981685 [2023-09-01 08:33:05,028 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 662 transitions. [2023-09-01 08:33:05,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 662 transitions. [2023-09-01 08:33:05,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:05,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 662 transitions. [2023-09-01 08:33:05,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 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 08:33:05,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 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 08:33:05,034 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 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 08:33:05,034 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 131 flow. Second operand 5 states and 662 transitions. [2023-09-01 08:33:05,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 70 transitions, 330 flow [2023-09-01 08:33:05,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 70 transitions, 322 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 08:33:05,039 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 102 flow [2023-09-01 08:33:05,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=102, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2023-09-01 08:33:05,043 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2023-09-01 08:33:05,044 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 102 flow [2023-09-01 08:33:05,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 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 08:33:05,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:05,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 08:33:05,056 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 08:33:05,250 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,SelfDestructingSolverStorable2 [2023-09-01 08:33:05,251 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:33:05,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:05,252 INFO L85 PathProgramCache]: Analyzing trace with hash 609342769, now seen corresponding path program 1 times [2023-09-01 08:33:05,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:05,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658945459] [2023-09-01 08:33:05,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:05,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:05,331 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 08:33:05,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:05,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658945459] [2023-09-01 08:33:05,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658945459] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:33:05,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:33:05,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:33:05,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649942711] [2023-09-01 08:33:05,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:33:05,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:33:05,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:05,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:33:05,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:33:05,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 273 [2023-09-01 08:33:05,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 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 08:33:05,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:05,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 273 [2023-09-01 08:33:05,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:05,797 INFO L130 PetriNetUnfolder]: 2656/4092 cut-off events. [2023-09-01 08:33:05,798 INFO L131 PetriNetUnfolder]: For 68/68 co-relation queries the response was YES. [2023-09-01 08:33:05,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8370 conditions, 4092 events. 2656/4092 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 24616 event pairs, 895 based on Foata normal form. 0/2287 useless extension candidates. Maximal degree in co-relation 6677. Up to 2921 conditions per place. [2023-09-01 08:33:05,821 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 35 selfloop transitions, 2 changer transitions 1/41 dead transitions. [2023-09-01 08:33:05,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 203 flow [2023-09-01 08:33:05,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:33:05,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:33:05,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 386 transitions. [2023-09-01 08:33:05,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4713064713064713 [2023-09-01 08:33:05,824 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 386 transitions. [2023-09-01 08:33:05,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 386 transitions. [2023-09-01 08:33:05,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:05,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 386 transitions. [2023-09-01 08:33:05,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 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 08:33:05,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 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 08:33:05,827 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 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 08:33:05,827 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 102 flow. Second operand 3 states and 386 transitions. [2023-09-01 08:33:05,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 203 flow [2023-09-01 08:33:05,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 198 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 08:33:05,829 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 115 flow [2023-09-01 08:33:05,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-09-01 08:33:05,830 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2023-09-01 08:33:05,831 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 115 flow [2023-09-01 08:33:05,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 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 08:33:05,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:05,831 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 08:33:05,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 08:33:05,832 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:33:05,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:05,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1711553229, now seen corresponding path program 2 times [2023-09-01 08:33:05,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:05,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244107532] [2023-09-01 08:33:05,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:05,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:05,932 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 08:33:05,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:05,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244107532] [2023-09-01 08:33:05,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244107532] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:05,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402113564] [2023-09-01 08:33:05,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:33:05,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:05,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:05,937 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 08:33:05,958 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 08:33:06,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:33:06,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:33:06,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 08:33:06,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:06,031 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 08:33:06,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:33:06,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402113564] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:33:06,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:33:06,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-09-01 08:33:06,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969816141] [2023-09-01 08:33:06,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:33:06,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:33:06,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:06,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:33:06,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 08:33:06,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 273 [2023-09-01 08:33:06,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 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 08:33:06,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:06,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 273 [2023-09-01 08:33:06,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:06,486 INFO L130 PetriNetUnfolder]: 2656/4041 cut-off events. [2023-09-01 08:33:06,487 INFO L131 PetriNetUnfolder]: For 413/413 co-relation queries the response was YES. [2023-09-01 08:33:06,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9634 conditions, 4041 events. 2656/4041 cut-off events. For 413/413 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 24067 event pairs, 1855 based on Foata normal form. 1/2717 useless extension candidates. Maximal degree in co-relation 7693. Up to 3886 conditions per place. [2023-09-01 08:33:06,507 INFO L137 encePairwiseOnDemand]: 271/273 looper letters, 26 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-09-01 08:33:06,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 30 transitions, 159 flow [2023-09-01 08:33:06,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:33:06,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:33:06,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 383 transitions. [2023-09-01 08:33:06,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46764346764346765 [2023-09-01 08:33:06,510 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 383 transitions. [2023-09-01 08:33:06,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 383 transitions. [2023-09-01 08:33:06,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:06,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 383 transitions. [2023-09-01 08:33:06,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 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 08:33:06,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 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 08:33:06,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 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 08:33:06,513 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 115 flow. Second operand 3 states and 383 transitions. [2023-09-01 08:33:06,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 30 transitions, 159 flow [2023-09-01 08:33:06,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 30 transitions, 147 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-09-01 08:33:06,516 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 95 flow [2023-09-01 08:33:06,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2023-09-01 08:33:06,517 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2023-09-01 08:33:06,517 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 95 flow [2023-09-01 08:33:06,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 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 08:33:06,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:06,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:06,526 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 08:33:06,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:06,724 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:33:06,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:06,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1467362211, now seen corresponding path program 1 times [2023-09-01 08:33:06,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:06,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344726191] [2023-09-01 08:33:06,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:06,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:06,800 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 08:33:06,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:06,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344726191] [2023-09-01 08:33:06,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344726191] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:33:06,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:33:06,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:33:06,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992755433] [2023-09-01 08:33:06,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:33:06,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:33:06,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:06,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:33:06,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 08:33:06,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 273 [2023-09-01 08:33:06,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 95 flow. Second operand has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 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 08:33:06,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:06,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 273 [2023-09-01 08:33:06,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:07,185 INFO L130 PetriNetUnfolder]: 2184/3347 cut-off events. [2023-09-01 08:33:07,185 INFO L131 PetriNetUnfolder]: For 343/343 co-relation queries the response was YES. [2023-09-01 08:33:07,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7884 conditions, 3347 events. 2184/3347 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 19315 event pairs, 1543 based on Foata normal form. 16/2306 useless extension candidates. Maximal degree in co-relation 7874. Up to 3110 conditions per place. [2023-09-01 08:33:07,198 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 25 selfloop transitions, 2 changer transitions 13/43 dead transitions. [2023-09-01 08:33:07,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 43 transitions, 207 flow [2023-09-01 08:33:07,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:33:07,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:33:07,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 503 transitions. [2023-09-01 08:33:07,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4606227106227106 [2023-09-01 08:33:07,201 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 503 transitions. [2023-09-01 08:33:07,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 503 transitions. [2023-09-01 08:33:07,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:07,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 503 transitions. [2023-09-01 08:33:07,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 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 08:33:07,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 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 08:33:07,204 INFO L81 ComplementDD]: Finished complementDD. Result 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 08:33:07,205 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 95 flow. Second operand 4 states and 503 transitions. [2023-09-01 08:33:07,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 43 transitions, 207 flow [2023-09-01 08:33:07,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 43 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:33:07,206 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 108 flow [2023-09-01 08:33:07,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2023-09-01 08:33:07,207 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2023-09-01 08:33:07,207 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 108 flow [2023-09-01 08:33:07,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 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 08:33:07,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:07,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:07,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 08:33:07,208 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:33:07,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:07,209 INFO L85 PathProgramCache]: Analyzing trace with hash -220976649, now seen corresponding path program 1 times [2023-09-01 08:33:07,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:07,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515095844] [2023-09-01 08:33:07,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:07,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:07,279 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 08:33:07,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:07,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515095844] [2023-09-01 08:33:07,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515095844] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:07,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027713504] [2023-09-01 08:33:07,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:07,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:07,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:07,281 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 08:33:07,304 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 08:33:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:07,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:33:07,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:33:07,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:33:07,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027713504] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:33:07,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:33:07,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-09-01 08:33:07,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774204451] [2023-09-01 08:33:07,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:33:07,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:33:07,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:07,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:33:07,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 08:33:07,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 273 [2023-09-01 08:33:07,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 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 08:33:07,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:07,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 273 [2023-09-01 08:33:07,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:07,531 INFO L130 PetriNetUnfolder]: 973/1538 cut-off events. [2023-09-01 08:33:07,531 INFO L131 PetriNetUnfolder]: For 512/512 co-relation queries the response was YES. [2023-09-01 08:33:07,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3723 conditions, 1538 events. 973/1538 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7870 event pairs, 644 based on Foata normal form. 184/1494 useless extension candidates. Maximal degree in co-relation 3710. Up to 1462 conditions per place. [2023-09-01 08:33:07,537 INFO L137 encePairwiseOnDemand]: 269/273 looper letters, 20 selfloop transitions, 1 changer transitions 3/27 dead transitions. [2023-09-01 08:33:07,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 27 transitions, 144 flow [2023-09-01 08:33:07,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:33:07,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:33:07,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2023-09-01 08:33:07,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46642246642246643 [2023-09-01 08:33:07,540 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2023-09-01 08:33:07,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2023-09-01 08:33:07,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:07,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2023-09-01 08:33:07,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 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 08:33:07,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 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 08:33:07,543 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 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 08:33:07,543 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 108 flow. Second operand 3 states and 382 transitions. [2023-09-01 08:33:07,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 27 transitions, 144 flow [2023-09-01 08:33:07,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 27 transitions, 136 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 08:33:07,544 INFO L231 Difference]: Finished difference. Result has 37 places, 24 transitions, 83 flow [2023-09-01 08:33:07,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=37, PETRI_TRANSITIONS=24} [2023-09-01 08:33:07,545 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2023-09-01 08:33:07,545 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 24 transitions, 83 flow [2023-09-01 08:33:07,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 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 08:33:07,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:07,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:07,556 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 08:33:07,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:07,757 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:33:07,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:07,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1905150117, now seen corresponding path program 1 times [2023-09-01 08:33:07,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:07,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278408472] [2023-09-01 08:33:07,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:07,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:08,270 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 08:33:08,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:08,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278408472] [2023-09-01 08:33:08,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278408472] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:08,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256106390] [2023-09-01 08:33:08,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:08,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:08,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:08,273 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 08:33:08,275 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 08:33:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:08,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 08:33:08,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:08,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:33:08,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:33:08,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:33:08,711 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 08:33:08,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:33:09,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:09,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-09-01 08:33:09,175 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:09,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 140 [2023-09-01 08:33:09,190 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:09,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 116 [2023-09-01 08:33:09,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:09,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 79 [2023-09-01 08:33:09,624 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 08:33:09,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256106390] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:33:09,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:33:09,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 16 [2023-09-01 08:33:09,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888460089] [2023-09-01 08:33:09,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:33:09,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 08:33:09,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:09,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 08:33:09,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=227, Unknown=1, NotChecked=0, Total=306 [2023-09-01 08:33:09,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 273 [2023-09-01 08:33:09,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 24 transitions, 83 flow. Second operand has 18 states, 18 states have (on average 71.66666666666667) internal successors, (1290), 18 states have internal predecessors, (1290), 0 states have call successors, (0), 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 08:33:09,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:09,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 273 [2023-09-01 08:33:09,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:11,470 INFO L130 PetriNetUnfolder]: 2024/3196 cut-off events. [2023-09-01 08:33:11,471 INFO L131 PetriNetUnfolder]: For 259/259 co-relation queries the response was YES. [2023-09-01 08:33:11,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7779 conditions, 3196 events. 2024/3196 cut-off events. For 259/259 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 17221 event pairs, 280 based on Foata normal form. 12/2843 useless extension candidates. Maximal degree in co-relation 7767. Up to 1251 conditions per place. [2023-09-01 08:33:11,491 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 119 selfloop transitions, 66 changer transitions 3/188 dead transitions. [2023-09-01 08:33:11,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 188 transitions, 912 flow [2023-09-01 08:33:11,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 08:33:11,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 08:33:11,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1943 transitions. [2023-09-01 08:33:11,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2846886446886447 [2023-09-01 08:33:11,498 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1943 transitions. [2023-09-01 08:33:11,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1943 transitions. [2023-09-01 08:33:11,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:11,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1943 transitions. [2023-09-01 08:33:11,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 77.72) internal successors, (1943), 25 states have internal predecessors, (1943), 0 states have call successors, (0), 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 08:33:11,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 273.0) internal successors, (7098), 26 states have internal predecessors, (7098), 0 states have call successors, (0), 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 08:33:11,519 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 273.0) internal successors, (7098), 26 states have internal predecessors, (7098), 0 states have call successors, (0), 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 08:33:11,520 INFO L175 Difference]: Start difference. First operand has 37 places, 24 transitions, 83 flow. Second operand 25 states and 1943 transitions. [2023-09-01 08:33:11,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 188 transitions, 912 flow [2023-09-01 08:33:11,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 188 transitions, 911 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:33:11,524 INFO L231 Difference]: Finished difference. Result has 71 places, 94 transitions, 600 flow [2023-09-01 08:33:11,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=600, PETRI_PLACES=71, PETRI_TRANSITIONS=94} [2023-09-01 08:33:11,527 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 34 predicate places. [2023-09-01 08:33:11,527 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 94 transitions, 600 flow [2023-09-01 08:33:11,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 71.66666666666667) internal successors, (1290), 18 states have internal predecessors, (1290), 0 states have call successors, (0), 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 08:33:11,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:11,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:11,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 08:33:11,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:11,734 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:33:11,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:11,735 INFO L85 PathProgramCache]: Analyzing trace with hash -97608240, now seen corresponding path program 1 times [2023-09-01 08:33:11,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:11,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924467199] [2023-09-01 08:33:11,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:11,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:12,208 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 08:33:12,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:12,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924467199] [2023-09-01 08:33:12,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924467199] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:12,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817358557] [2023-09-01 08:33:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:12,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:12,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:12,211 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 08:33:12,223 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 08:33:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:12,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 39 conjunts are in the unsatisfiable core [2023-09-01 08:33:12,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:12,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:33:12,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:33:12,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:33:12,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:33:12,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 08:33:12,692 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 08:33:12,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:33:13,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:13,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2023-09-01 08:33:13,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:13,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 484 treesize of output 460 [2023-09-01 08:33:13,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 128 [2023-09-01 08:33:13,264 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:13,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 122 [2023-09-01 08:33:13,282 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:13,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 109 [2023-09-01 08:33:13,669 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 08:33:13,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817358557] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:33:13,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:33:13,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-09-01 08:33:13,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244149328] [2023-09-01 08:33:13,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:33:13,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 08:33:13,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:13,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 08:33:13,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=450, Unknown=3, NotChecked=0, Total=552 [2023-09-01 08:33:14,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 273 [2023-09-01 08:33:14,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 94 transitions, 600 flow. Second operand has 24 states, 24 states have (on average 68.375) internal successors, (1641), 24 states have internal predecessors, (1641), 0 states have call successors, (0), 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 08:33:14,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:14,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 273 [2023-09-01 08:33:14,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:17,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:33:18,945 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_307 (Array Int Int))) (< (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_307) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)))) (and (or (< 2147483646 c_~back~0) (= (mod c_~v_assert~0 256) 0) (<= c_~n~0 c_~back~0) .cse0 (< c_~back~0 0) (not (= (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1))) (or .cse0 (= (mod |c_thread1Thread1of1ForFork2_~cond~0#1| 256) 0)))) is different from false [2023-09-01 08:33:20,031 INFO L130 PetriNetUnfolder]: 2549/4094 cut-off events. [2023-09-01 08:33:20,032 INFO L131 PetriNetUnfolder]: For 17876/17876 co-relation queries the response was YES. [2023-09-01 08:33:20,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17431 conditions, 4094 events. 2549/4094 cut-off events. For 17876/17876 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 23645 event pairs, 570 based on Foata normal form. 210/4304 useless extension candidates. Maximal degree in co-relation 17404. Up to 1965 conditions per place. [2023-09-01 08:33:20,056 INFO L137 encePairwiseOnDemand]: 256/273 looper letters, 163 selfloop transitions, 125 changer transitions 5/293 dead transitions. [2023-09-01 08:33:20,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 293 transitions, 2413 flow [2023-09-01 08:33:20,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-09-01 08:33:20,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-09-01 08:33:20,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2649 transitions. [2023-09-01 08:33:20,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2695360195360195 [2023-09-01 08:33:20,067 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2649 transitions. [2023-09-01 08:33:20,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2649 transitions. [2023-09-01 08:33:20,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:20,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2649 transitions. [2023-09-01 08:33:20,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 73.58333333333333) internal successors, (2649), 36 states have internal predecessors, (2649), 0 states have call successors, (0), 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 08:33:20,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 273.0) internal successors, (10101), 37 states have internal predecessors, (10101), 0 states have call successors, (0), 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 08:33:20,087 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 273.0) internal successors, (10101), 37 states have internal predecessors, (10101), 0 states have call successors, (0), 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 08:33:20,088 INFO L175 Difference]: Start difference. First operand has 71 places, 94 transitions, 600 flow. Second operand 36 states and 2649 transitions. [2023-09-01 08:33:20,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 293 transitions, 2413 flow [2023-09-01 08:33:20,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 293 transitions, 2321 flow, removed 42 selfloop flow, removed 4 redundant places. [2023-09-01 08:33:20,132 INFO L231 Difference]: Finished difference. Result has 121 places, 168 transitions, 1441 flow [2023-09-01 08:33:20,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1441, PETRI_PLACES=121, PETRI_TRANSITIONS=168} [2023-09-01 08:33:20,133 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 84 predicate places. [2023-09-01 08:33:20,133 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 168 transitions, 1441 flow [2023-09-01 08:33:20,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 68.375) internal successors, (1641), 24 states have internal predecessors, (1641), 0 states have call successors, (0), 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 08:33:20,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:20,134 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:20,146 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 08:33:20,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:20,344 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:33:20,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:20,344 INFO L85 PathProgramCache]: Analyzing trace with hash -846278372, now seen corresponding path program 1 times [2023-09-01 08:33:20,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:20,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267459918] [2023-09-01 08:33:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:20,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:21,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:21,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267459918] [2023-09-01 08:33:21,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267459918] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:21,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712948688] [2023-09-01 08:33:21,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:21,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:21,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:21,301 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 08:33:21,325 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 08:33:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:21,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 08:33:21,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:33:21,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:33:21,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:21,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 45 [2023-09-01 08:33:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:33:21,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712948688] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:21,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 08:33:21,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 13 [2023-09-01 08:33:21,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018849962] [2023-09-01 08:33:21,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:33:21,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 08:33:21,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:21,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 08:33:21,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-09-01 08:33:21,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 273 [2023-09-01 08:33:21,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 168 transitions, 1441 flow. Second operand has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 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 08:33:21,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:21,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 273 [2023-09-01 08:33:21,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:22,545 INFO L130 PetriNetUnfolder]: 2282/3749 cut-off events. [2023-09-01 08:33:22,545 INFO L131 PetriNetUnfolder]: For 46262/46309 co-relation queries the response was YES. [2023-09-01 08:33:22,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23112 conditions, 3749 events. 2282/3749 cut-off events. For 46262/46309 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 22686 event pairs, 167 based on Foata normal form. 66/3815 useless extension candidates. Maximal degree in co-relation 23065. Up to 1677 conditions per place. [2023-09-01 08:33:22,582 INFO L137 encePairwiseOnDemand]: 263/273 looper letters, 216 selfloop transitions, 74 changer transitions 3/304 dead transitions. [2023-09-01 08:33:22,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 304 transitions, 3307 flow [2023-09-01 08:33:22,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 08:33:22,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 08:33:22,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 775 transitions. [2023-09-01 08:33:22,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4055468341182627 [2023-09-01 08:33:22,585 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 775 transitions. [2023-09-01 08:33:22,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 775 transitions. [2023-09-01 08:33:22,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:22,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 775 transitions. [2023-09-01 08:33:22,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.71428571428571) internal successors, (775), 7 states have internal predecessors, (775), 0 states have call successors, (0), 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 08:33:22,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 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 08:33:22,590 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 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 08:33:22,591 INFO L175 Difference]: Start difference. First operand has 121 places, 168 transitions, 1441 flow. Second operand 7 states and 775 transitions. [2023-09-01 08:33:22,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 304 transitions, 3307 flow [2023-09-01 08:33:22,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 304 transitions, 3139 flow, removed 70 selfloop flow, removed 7 redundant places. [2023-09-01 08:33:22,758 INFO L231 Difference]: Finished difference. Result has 126 places, 217 transitions, 2169 flow [2023-09-01 08:33:22,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2169, PETRI_PLACES=126, PETRI_TRANSITIONS=217} [2023-09-01 08:33:22,759 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 89 predicate places. [2023-09-01 08:33:22,759 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 217 transitions, 2169 flow [2023-09-01 08:33:22,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 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 08:33:22,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:22,760 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:22,772 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 08:33:22,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:22,972 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:33:22,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:22,973 INFO L85 PathProgramCache]: Analyzing trace with hash -644454118, now seen corresponding path program 2 times [2023-09-01 08:33:22,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:22,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795183652] [2023-09-01 08:33:22,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:22,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:24,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:24,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795183652] [2023-09-01 08:33:24,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795183652] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:24,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688328062] [2023-09-01 08:33:24,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:33:24,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:24,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:24,130 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 08:33:24,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 08:33:24,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:33:24,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:33:24,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 08:33:24,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:33:24,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:33:24,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688328062] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:33:24,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:33:24,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 12 [2023-09-01 08:33:24,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934553217] [2023-09-01 08:33:24,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:33:24,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 08:33:24,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:24,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 08:33:24,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-09-01 08:33:24,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 273 [2023-09-01 08:33:24,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 217 transitions, 2169 flow. Second operand has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 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 08:33:24,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:24,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 273 [2023-09-01 08:33:24,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:24,884 INFO L130 PetriNetUnfolder]: 1828/3020 cut-off events. [2023-09-01 08:33:24,884 INFO L131 PetriNetUnfolder]: For 48386/48415 co-relation queries the response was YES. [2023-09-01 08:33:24,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20187 conditions, 3020 events. 1828/3020 cut-off events. For 48386/48415 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 17482 event pairs, 284 based on Foata normal form. 45/3065 useless extension candidates. Maximal degree in co-relation 20133. Up to 2485 conditions per place. [2023-09-01 08:33:24,914 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 174 selfloop transitions, 52 changer transitions 0/237 dead transitions. [2023-09-01 08:33:24,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 237 transitions, 2785 flow [2023-09-01 08:33:24,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 08:33:24,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 08:33:24,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 670 transitions. [2023-09-01 08:33:24,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409035409035409 [2023-09-01 08:33:24,917 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 670 transitions. [2023-09-01 08:33:24,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 670 transitions. [2023-09-01 08:33:24,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:24,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 670 transitions. [2023-09-01 08:33:24,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 111.66666666666667) internal successors, (670), 6 states have internal predecessors, (670), 0 states have call successors, (0), 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 08:33:24,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 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 08:33:24,921 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 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 08:33:24,921 INFO L175 Difference]: Start difference. First operand has 126 places, 217 transitions, 2169 flow. Second operand 6 states and 670 transitions. [2023-09-01 08:33:24,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 237 transitions, 2785 flow [2023-09-01 08:33:25,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 237 transitions, 2686 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-09-01 08:33:25,099 INFO L231 Difference]: Finished difference. Result has 130 places, 217 transitions, 2209 flow [2023-09-01 08:33:25,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2020, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2209, PETRI_PLACES=130, PETRI_TRANSITIONS=217} [2023-09-01 08:33:25,100 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 93 predicate places. [2023-09-01 08:33:25,100 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 217 transitions, 2209 flow [2023-09-01 08:33:25,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 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 08:33:25,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:25,101 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:25,113 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 08:33:25,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-09-01 08:33:25,307 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:33:25,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:25,307 INFO L85 PathProgramCache]: Analyzing trace with hash 967492083, now seen corresponding path program 1 times [2023-09-01 08:33:25,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:25,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462389292] [2023-09-01 08:33:25,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:25,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:26,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:26,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462389292] [2023-09-01 08:33:26,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462389292] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:26,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487131987] [2023-09-01 08:33:26,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:26,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:26,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:26,208 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 08:33:26,212 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 08:33:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:26,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 08:33:26,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:26,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:33:26,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:33:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:33:26,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:33:26,586 WARN L839 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_452 (Array Int Int))) (< 0 (+ c_~sum~0 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_452) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))))) (= (mod |c_thread1Thread1of1ForFork2_~cond~0#1| 256) 0)) is different from false [2023-09-01 08:33:26,626 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:26,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 66 [2023-09-01 08:33:26,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-09-01 08:33:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:33:26,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487131987] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:26,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 08:33:26,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 21 [2023-09-01 08:33:26,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926127828] [2023-09-01 08:33:26,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:33:26,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 08:33:26,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:26,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 08:33:26,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=399, Unknown=1, NotChecked=40, Total=506 [2023-09-01 08:33:27,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 273 [2023-09-01 08:33:27,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 217 transitions, 2209 flow. Second operand has 8 states, 8 states have (on average 86.375) internal successors, (691), 8 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:33:27,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:27,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 273 [2023-09-01 08:33:27,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:27,856 INFO L130 PetriNetUnfolder]: 2726/4310 cut-off events. [2023-09-01 08:33:27,856 INFO L131 PetriNetUnfolder]: For 56355/56355 co-relation queries the response was YES. [2023-09-01 08:33:27,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28388 conditions, 4310 events. 2726/4310 cut-off events. For 56355/56355 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 24506 event pairs, 570 based on Foata normal form. 49/4359 useless extension candidates. Maximal degree in co-relation 28333. Up to 3274 conditions per place. [2023-09-01 08:33:27,887 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 227 selfloop transitions, 112 changer transitions 1/340 dead transitions. [2023-09-01 08:33:27,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 340 transitions, 4248 flow [2023-09-01 08:33:27,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 08:33:27,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 08:33:27,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 828 transitions. [2023-09-01 08:33:27,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.336996336996337 [2023-09-01 08:33:27,893 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 828 transitions. [2023-09-01 08:33:27,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 828 transitions. [2023-09-01 08:33:27,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:27,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 828 transitions. [2023-09-01 08:33:27,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 92.0) internal successors, (828), 9 states have internal predecessors, (828), 0 states have call successors, (0), 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 08:33:27,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 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 08:33:27,900 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 273.0) internal successors, (2730), 10 states have internal predecessors, (2730), 0 states have call successors, (0), 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 08:33:27,900 INFO L175 Difference]: Start difference. First operand has 130 places, 217 transitions, 2209 flow. Second operand 9 states and 828 transitions. [2023-09-01 08:33:27,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 340 transitions, 4248 flow [2023-09-01 08:33:28,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 340 transitions, 4125 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-09-01 08:33:28,121 INFO L231 Difference]: Finished difference. Result has 142 places, 289 transitions, 3568 flow [2023-09-01 08:33:28,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2143, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3568, PETRI_PLACES=142, PETRI_TRANSITIONS=289} [2023-09-01 08:33:28,123 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 105 predicate places. [2023-09-01 08:33:28,123 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 289 transitions, 3568 flow [2023-09-01 08:33:28,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 86.375) internal successors, (691), 8 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:33:28,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:28,124 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:28,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 08:33:28,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:28,330 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:33:28,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:28,330 INFO L85 PathProgramCache]: Analyzing trace with hash -464822802, now seen corresponding path program 3 times [2023-09-01 08:33:28,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:28,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208619783] [2023-09-01 08:33:28,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:28,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:29,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:29,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208619783] [2023-09-01 08:33:29,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208619783] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:29,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458589097] [2023-09-01 08:33:29,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:33:29,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:29,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:29,309 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 08:33:29,315 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 08:33:29,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 08:33:29,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:33:29,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 08:33:29,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:29,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:33:29,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:33:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:33:29,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:33:29,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458589097] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:33:29,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:33:29,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-09-01 08:33:29,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565320667] [2023-09-01 08:33:29,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:33:29,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:33:29,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:29,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:33:29,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-09-01 08:33:29,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 273 [2023-09-01 08:33:29,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 289 transitions, 3568 flow. Second operand has 7 states, 7 states have (on average 101.42857142857143) internal successors, (710), 7 states have internal predecessors, (710), 0 states have call successors, (0), 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 08:33:29,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:29,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 273 [2023-09-01 08:33:29,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:30,440 INFO L130 PetriNetUnfolder]: 2389/3924 cut-off events. [2023-09-01 08:33:30,441 INFO L131 PetriNetUnfolder]: For 74669/74712 co-relation queries the response was YES. [2023-09-01 08:33:30,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28911 conditions, 3924 events. 2389/3924 cut-off events. For 74669/74712 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 23523 event pairs, 355 based on Foata normal form. 70/3994 useless extension candidates. Maximal degree in co-relation 28850. Up to 2336 conditions per place. [2023-09-01 08:33:30,472 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 203 selfloop transitions, 100 changer transitions 0/317 dead transitions. [2023-09-01 08:33:30,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 317 transitions, 4474 flow [2023-09-01 08:33:30,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 08:33:30,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 08:33:30,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 639 transitions. [2023-09-01 08:33:30,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3901098901098901 [2023-09-01 08:33:30,475 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 639 transitions. [2023-09-01 08:33:30,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 639 transitions. [2023-09-01 08:33:30,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:30,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 639 transitions. [2023-09-01 08:33:30,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.5) internal successors, (639), 6 states have internal predecessors, (639), 0 states have call successors, (0), 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 08:33:30,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 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 08:33:30,479 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 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 08:33:30,479 INFO L175 Difference]: Start difference. First operand has 142 places, 289 transitions, 3568 flow. Second operand 6 states and 639 transitions. [2023-09-01 08:33:30,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 317 transitions, 4474 flow [2023-09-01 08:33:30,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 317 transitions, 4396 flow, removed 39 selfloop flow, removed 0 redundant places. [2023-09-01 08:33:30,722 INFO L231 Difference]: Finished difference. Result has 148 places, 293 transitions, 3847 flow [2023-09-01 08:33:30,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3498, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3847, PETRI_PLACES=148, PETRI_TRANSITIONS=293} [2023-09-01 08:33:30,723 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 111 predicate places. [2023-09-01 08:33:30,723 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 293 transitions, 3847 flow [2023-09-01 08:33:30,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 101.42857142857143) internal successors, (710), 7 states have internal predecessors, (710), 0 states have call successors, (0), 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 08:33:30,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:30,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:30,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 08:33:30,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 08:33:30,929 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:33:30,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:30,929 INFO L85 PathProgramCache]: Analyzing trace with hash -840121789, now seen corresponding path program 1 times [2023-09-01 08:33:30,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:30,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073844082] [2023-09-01 08:33:30,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:30,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:30,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:31,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:31,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073844082] [2023-09-01 08:33:31,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073844082] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:31,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078410431] [2023-09-01 08:33:31,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:31,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:31,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:31,048 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:33:31,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 08:33:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:31,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 08:33:31,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:31,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 98 [2023-09-01 08:33:31,281 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 08:33:31,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:33:31,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078410431] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:33:31,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:33:31,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2023-09-01 08:33:31,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483515423] [2023-09-01 08:33:31,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:33:31,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 08:33:31,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:31,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 08:33:31,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-09-01 08:33:31,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 273 [2023-09-01 08:33:31,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 293 transitions, 3847 flow. Second operand has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 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 08:33:31,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:31,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 273 [2023-09-01 08:33:31,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:32,178 INFO L130 PetriNetUnfolder]: 3166/5294 cut-off events. [2023-09-01 08:33:32,178 INFO L131 PetriNetUnfolder]: For 124220/124742 co-relation queries the response was YES. [2023-09-01 08:33:32,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41057 conditions, 5294 events. 3166/5294 cut-off events. For 124220/124742 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 34164 event pairs, 556 based on Foata normal form. 304/5503 useless extension candidates. Maximal degree in co-relation 40993. Up to 2550 conditions per place. [2023-09-01 08:33:32,215 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 199 selfloop transitions, 85 changer transitions 22/325 dead transitions. [2023-09-01 08:33:32,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 325 transitions, 5127 flow [2023-09-01 08:33:32,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:33:32,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:33:32,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 506 transitions. [2023-09-01 08:33:32,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4633699633699634 [2023-09-01 08:33:32,221 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 506 transitions. [2023-09-01 08:33:32,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 506 transitions. [2023-09-01 08:33:32,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:32,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 506 transitions. [2023-09-01 08:33:32,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 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 08:33:32,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 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 08:33:32,236 INFO L81 ComplementDD]: Finished complementDD. Result 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 08:33:32,236 INFO L175 Difference]: Start difference. First operand has 148 places, 293 transitions, 3847 flow. Second operand 4 states and 506 transitions. [2023-09-01 08:33:32,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 325 transitions, 5127 flow [2023-09-01 08:33:32,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 325 transitions, 4918 flow, removed 40 selfloop flow, removed 10 redundant places. [2023-09-01 08:33:32,559 INFO L231 Difference]: Finished difference. Result has 139 places, 264 transitions, 3813 flow [2023-09-01 08:33:32,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3336, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3813, PETRI_PLACES=139, PETRI_TRANSITIONS=264} [2023-09-01 08:33:32,560 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 102 predicate places. [2023-09-01 08:33:32,560 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 264 transitions, 3813 flow [2023-09-01 08:33:32,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 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 08:33:32,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:32,561 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:32,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 08:33:32,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 08:33:32,770 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:33:32,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:32,770 INFO L85 PathProgramCache]: Analyzing trace with hash -464822803, now seen corresponding path program 2 times [2023-09-01 08:33:32,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:32,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409320977] [2023-09-01 08:33:32,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:32,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:33,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:33,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409320977] [2023-09-01 08:33:33,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409320977] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:33,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901868157] [2023-09-01 08:33:33,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:33:33,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:33,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:33,567 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:33:33,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 08:33:33,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:33:33,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:33:33,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 08:33:33,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:33,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:33:33,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:33:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:33:33,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:33:33,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901868157] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:33:33,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:33:33,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-09-01 08:33:33,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231159347] [2023-09-01 08:33:33,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:33:33,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:33:33,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:33,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:33:33,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-09-01 08:33:33,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 273 [2023-09-01 08:33:33,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 264 transitions, 3813 flow. Second operand has 7 states, 7 states have (on average 101.42857142857143) internal successors, (710), 7 states have internal predecessors, (710), 0 states have call successors, (0), 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 08:33:33,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:33,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 273 [2023-09-01 08:33:33,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:34,687 INFO L130 PetriNetUnfolder]: 2910/4963 cut-off events. [2023-09-01 08:33:34,687 INFO L131 PetriNetUnfolder]: For 92159/92304 co-relation queries the response was YES. [2023-09-01 08:33:34,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38549 conditions, 4963 events. 2910/4963 cut-off events. For 92159/92304 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 31966 event pairs, 568 based on Foata normal form. 115/5075 useless extension candidates. Maximal degree in co-relation 38490. Up to 3087 conditions per place. [2023-09-01 08:33:34,728 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 161 selfloop transitions, 103 changer transitions 0/278 dead transitions. [2023-09-01 08:33:34,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 278 transitions, 4479 flow [2023-09-01 08:33:34,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 08:33:34,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 08:33:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 638 transitions. [2023-09-01 08:33:34,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894993894993895 [2023-09-01 08:33:34,730 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 638 transitions. [2023-09-01 08:33:34,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 638 transitions. [2023-09-01 08:33:34,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:34,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 638 transitions. [2023-09-01 08:33:34,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.33333333333333) internal successors, (638), 6 states have internal predecessors, (638), 0 states have call successors, (0), 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 08:33:34,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 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 08:33:34,733 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 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 08:33:34,733 INFO L175 Difference]: Start difference. First operand has 139 places, 264 transitions, 3813 flow. Second operand 6 states and 638 transitions. [2023-09-01 08:33:34,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 278 transitions, 4479 flow [2023-09-01 08:33:34,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 278 transitions, 4469 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-09-01 08:33:34,998 INFO L231 Difference]: Finished difference. Result has 144 places, 255 transitions, 4023 flow [2023-09-01 08:33:34,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3733, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4023, PETRI_PLACES=144, PETRI_TRANSITIONS=255} [2023-09-01 08:33:34,998 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 107 predicate places. [2023-09-01 08:33:34,999 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 255 transitions, 4023 flow [2023-09-01 08:33:34,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 101.42857142857143) internal successors, (710), 7 states have internal predecessors, (710), 0 states have call successors, (0), 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 08:33:34,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:34,999 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:35,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 08:33:35,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 08:33:35,203 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:33:35,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:35,203 INFO L85 PathProgramCache]: Analyzing trace with hash -273968203, now seen corresponding path program 2 times [2023-09-01 08:33:35,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:35,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856044904] [2023-09-01 08:33:35,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:35,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:35,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:35,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856044904] [2023-09-01 08:33:35,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856044904] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:35,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186019473] [2023-09-01 08:33:35,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:33:35,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:35,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:35,297 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:33:35,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 08:33:35,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:33:35,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:33:35,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 08:33:35,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:35,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:33:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:35,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186019473] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:33:35,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:33:35,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-09-01 08:33:35,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530675093] [2023-09-01 08:33:35,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:33:35,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 08:33:35,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:35,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 08:33:35,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-09-01 08:33:35,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 273 [2023-09-01 08:33:35,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 255 transitions, 4023 flow. Second operand has 16 states, 16 states have (on average 112.0625) internal successors, (1793), 16 states have internal predecessors, (1793), 0 states have call successors, (0), 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 08:33:35,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:35,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 273 [2023-09-01 08:33:35,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:36,364 INFO L130 PetriNetUnfolder]: 1876/3327 cut-off events. [2023-09-01 08:33:36,364 INFO L131 PetriNetUnfolder]: For 66275/66543 co-relation queries the response was YES. [2023-09-01 08:33:36,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26266 conditions, 3327 events. 1876/3327 cut-off events. For 66275/66543 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 21032 event pairs, 782 based on Foata normal form. 93/3372 useless extension candidates. Maximal degree in co-relation 26204. Up to 2445 conditions per place. [2023-09-01 08:33:36,390 INFO L137 encePairwiseOnDemand]: 268/273 looper letters, 138 selfloop transitions, 3 changer transitions 81/230 dead transitions. [2023-09-01 08:33:36,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 230 transitions, 4027 flow [2023-09-01 08:33:36,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 08:33:36,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 08:33:36,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 811 transitions. [2023-09-01 08:33:36,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424385138670853 [2023-09-01 08:33:36,393 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 811 transitions. [2023-09-01 08:33:36,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 811 transitions. [2023-09-01 08:33:36,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:36,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 811 transitions. [2023-09-01 08:33:36,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 115.85714285714286) internal successors, (811), 7 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:33:36,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 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 08:33:36,401 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 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 08:33:36,401 INFO L175 Difference]: Start difference. First operand has 144 places, 255 transitions, 4023 flow. Second operand 7 states and 811 transitions. [2023-09-01 08:33:36,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 230 transitions, 4027 flow [2023-09-01 08:33:36,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 230 transitions, 3810 flow, removed 12 selfloop flow, removed 9 redundant places. [2023-09-01 08:33:36,558 INFO L231 Difference]: Finished difference. Result has 138 places, 149 transitions, 2308 flow [2023-09-01 08:33:36,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=3192, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2308, PETRI_PLACES=138, PETRI_TRANSITIONS=149} [2023-09-01 08:33:36,559 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 101 predicate places. [2023-09-01 08:33:36,559 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 149 transitions, 2308 flow [2023-09-01 08:33:36,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 112.0625) internal successors, (1793), 16 states have internal predecessors, (1793), 0 states have call successors, (0), 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 08:33:36,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:36,559 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:36,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 08:33:36,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 08:33:36,760 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:33:36,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:36,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1047368430, now seen corresponding path program 1 times [2023-09-01 08:33:36,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:36,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556456438] [2023-09-01 08:33:36,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:36,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:37,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:37,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556456438] [2023-09-01 08:33:37,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556456438] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:37,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869014965] [2023-09-01 08:33:37,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:37,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:37,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:37,709 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:33:37,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 08:33:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:37,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 08:33:37,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:33:37,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:33:38,048 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:38,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 44 [2023-09-01 08:33:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:33:38,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869014965] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:38,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 08:33:38,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 18 [2023-09-01 08:33:38,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108272289] [2023-09-01 08:33:38,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:33:38,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:33:38,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:38,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:33:38,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-09-01 08:33:38,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 273 [2023-09-01 08:33:38,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 149 transitions, 2308 flow. Second operand has 7 states, 7 states have (on average 102.85714285714286) internal successors, (720), 7 states have internal predecessors, (720), 0 states have call successors, (0), 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 08:33:38,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:38,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 273 [2023-09-01 08:33:38,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:39,054 INFO L130 PetriNetUnfolder]: 2410/3947 cut-off events. [2023-09-01 08:33:39,054 INFO L131 PetriNetUnfolder]: For 65497/65781 co-relation queries the response was YES. [2023-09-01 08:33:39,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29651 conditions, 3947 events. 2410/3947 cut-off events. For 65497/65781 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23425 event pairs, 559 based on Foata normal form. 28/3887 useless extension candidates. Maximal degree in co-relation 29592. Up to 2361 conditions per place. [2023-09-01 08:33:39,083 INFO L137 encePairwiseOnDemand]: 265/273 looper letters, 124 selfloop transitions, 87 changer transitions 1/214 dead transitions. [2023-09-01 08:33:39,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 214 transitions, 3684 flow [2023-09-01 08:33:39,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 08:33:39,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 08:33:39,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 758 transitions. [2023-09-01 08:33:39,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39665096807953953 [2023-09-01 08:33:39,085 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 758 transitions. [2023-09-01 08:33:39,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 758 transitions. [2023-09-01 08:33:39,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:39,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 758 transitions. [2023-09-01 08:33:39,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 108.28571428571429) internal successors, (758), 7 states have internal predecessors, (758), 0 states have call successors, (0), 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 08:33:39,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 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 08:33:39,089 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 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 08:33:39,089 INFO L175 Difference]: Start difference. First operand has 138 places, 149 transitions, 2308 flow. Second operand 7 states and 758 transitions. [2023-09-01 08:33:39,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 214 transitions, 3684 flow [2023-09-01 08:33:39,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 214 transitions, 3516 flow, removed 56 selfloop flow, removed 16 redundant places. [2023-09-01 08:33:39,203 INFO L231 Difference]: Finished difference. Result has 112 places, 185 transitions, 3159 flow [2023-09-01 08:33:39,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2202, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3159, PETRI_PLACES=112, PETRI_TRANSITIONS=185} [2023-09-01 08:33:39,204 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 75 predicate places. [2023-09-01 08:33:39,204 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 185 transitions, 3159 flow [2023-09-01 08:33:39,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 102.85714285714286) internal successors, (720), 7 states have internal predecessors, (720), 0 states have call successors, (0), 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 08:33:39,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:39,204 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:39,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 08:33:39,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:39,410 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:33:39,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:39,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1045456349, now seen corresponding path program 1 times [2023-09-01 08:33:39,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:39,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895022744] [2023-09-01 08:33:39,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:39,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:40,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:40,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895022744] [2023-09-01 08:33:40,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895022744] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:40,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77985483] [2023-09-01 08:33:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:40,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:40,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:40,197 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:33:40,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 08:33:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:40,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 08:33:40,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:33:40,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:33:40,479 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:40,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 45 [2023-09-01 08:33:40,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:33:40,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77985483] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:40,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 08:33:40,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 5] total 17 [2023-09-01 08:33:40,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854014234] [2023-09-01 08:33:40,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:33:40,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 08:33:40,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:40,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 08:33:40,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-09-01 08:33:40,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 273 [2023-09-01 08:33:40,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 185 transitions, 3159 flow. Second operand has 6 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 0 states have call successors, (0), 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 08:33:40,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:40,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 273 [2023-09-01 08:33:40,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:41,401 INFO L130 PetriNetUnfolder]: 1936/3336 cut-off events. [2023-09-01 08:33:41,401 INFO L131 PetriNetUnfolder]: For 59955/60082 co-relation queries the response was YES. [2023-09-01 08:33:41,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26289 conditions, 3336 events. 1936/3336 cut-off events. For 59955/60082 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 20537 event pairs, 200 based on Foata normal form. 175/3507 useless extension candidates. Maximal degree in co-relation 26237. Up to 1528 conditions per place. [2023-09-01 08:33:41,424 INFO L137 encePairwiseOnDemand]: 264/273 looper letters, 105 selfloop transitions, 100 changer transitions 4/216 dead transitions. [2023-09-01 08:33:41,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 216 transitions, 3933 flow [2023-09-01 08:33:41,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 08:33:41,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 08:33:41,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 772 transitions. [2023-09-01 08:33:41,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40397697540554683 [2023-09-01 08:33:41,429 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 772 transitions. [2023-09-01 08:33:41,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 772 transitions. [2023-09-01 08:33:41,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:41,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 772 transitions. [2023-09-01 08:33:41,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 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 08:33:41,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 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 08:33:41,433 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 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 08:33:41,433 INFO L175 Difference]: Start difference. First operand has 112 places, 185 transitions, 3159 flow. Second operand 7 states and 772 transitions. [2023-09-01 08:33:41,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 216 transitions, 3933 flow [2023-09-01 08:33:41,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 216 transitions, 3745 flow, removed 68 selfloop flow, removed 2 redundant places. [2023-09-01 08:33:41,525 INFO L231 Difference]: Finished difference. Result has 116 places, 182 transitions, 3140 flow [2023-09-01 08:33:41,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2933, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3140, PETRI_PLACES=116, PETRI_TRANSITIONS=182} [2023-09-01 08:33:41,526 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 79 predicate places. [2023-09-01 08:33:41,526 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 182 transitions, 3140 flow [2023-09-01 08:33:41,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 0 states have call successors, (0), 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 08:33:41,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:41,527 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:41,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 08:33:41,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 08:33:41,733 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:33:41,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:41,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1045456350, now seen corresponding path program 2 times [2023-09-01 08:33:41,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:41,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949087584] [2023-09-01 08:33:41,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:41,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:42,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:42,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949087584] [2023-09-01 08:33:42,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949087584] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:42,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343311046] [2023-09-01 08:33:42,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:33:42,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:42,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:42,188 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:33:42,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 08:33:42,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:33:42,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:33:42,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 08:33:42,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:33:42,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:33:42,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343311046] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:33:42,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:33:42,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-09-01 08:33:42,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599345960] [2023-09-01 08:33:42,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:33:42,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 08:33:42,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:42,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 08:33:42,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-09-01 08:33:42,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 273 [2023-09-01 08:33:42,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 182 transitions, 3140 flow. Second operand has 6 states, 6 states have (on average 106.0) internal successors, (636), 6 states have internal predecessors, (636), 0 states have call successors, (0), 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 08:33:42,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:42,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 273 [2023-09-01 08:33:42,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:43,073 INFO L130 PetriNetUnfolder]: 1864/3222 cut-off events. [2023-09-01 08:33:43,073 INFO L131 PetriNetUnfolder]: For 50599/50686 co-relation queries the response was YES. [2023-09-01 08:33:43,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24637 conditions, 3222 events. 1864/3222 cut-off events. For 50599/50686 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19471 event pairs, 364 based on Foata normal form. 135/3353 useless extension candidates. Maximal degree in co-relation 24585. Up to 2207 conditions per place. [2023-09-01 08:33:43,103 INFO L137 encePairwiseOnDemand]: 267/273 looper letters, 94 selfloop transitions, 89 changer transitions 0/190 dead transitions. [2023-09-01 08:33:43,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 190 transitions, 3518 flow [2023-09-01 08:33:43,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 08:33:43,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 08:33:43,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 555 transitions. [2023-09-01 08:33:43,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065934065934066 [2023-09-01 08:33:43,105 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 555 transitions. [2023-09-01 08:33:43,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 555 transitions. [2023-09-01 08:33:43,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:43,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 555 transitions. [2023-09-01 08:33:43,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:33:43,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 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 08:33:43,108 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 0 states have call successors, (0), 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 08:33:43,108 INFO L175 Difference]: Start difference. First operand has 116 places, 182 transitions, 3140 flow. Second operand 5 states and 555 transitions. [2023-09-01 08:33:43,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 190 transitions, 3518 flow [2023-09-01 08:33:43,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 190 transitions, 3386 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-09-01 08:33:43,191 INFO L231 Difference]: Finished difference. Result has 114 places, 175 transitions, 3072 flow [2023-09-01 08:33:43,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2894, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3072, PETRI_PLACES=114, PETRI_TRANSITIONS=175} [2023-09-01 08:33:43,193 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 77 predicate places. [2023-09-01 08:33:43,193 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 175 transitions, 3072 flow [2023-09-01 08:33:43,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 106.0) internal successors, (636), 6 states have internal predecessors, (636), 0 states have call successors, (0), 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 08:33:43,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:43,193 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:43,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 08:33:43,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:43,400 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:33:43,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:43,400 INFO L85 PathProgramCache]: Analyzing trace with hash -665209678, now seen corresponding path program 1 times [2023-09-01 08:33:43,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:43,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705195899] [2023-09-01 08:33:43,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:43,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:44,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:44,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705195899] [2023-09-01 08:33:44,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705195899] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:44,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269964126] [2023-09-01 08:33:44,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:44,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:44,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:44,137 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:33:44,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 08:33:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:44,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 08:33:44,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:44,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:33:45,097 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-09-01 08:33:45,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 183 [2023-09-01 08:33:45,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:45,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269964126] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:33:45,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:33:45,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2023-09-01 08:33:45,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816251099] [2023-09-01 08:33:45,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:33:45,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 08:33:45,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:45,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 08:33:45,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2023-09-01 08:33:47,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 273 [2023-09-01 08:33:47,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 175 transitions, 3072 flow. Second operand has 27 states, 27 states have (on average 92.44444444444444) internal successors, (2496), 27 states have internal predecessors, (2496), 0 states have call successors, (0), 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 08:33:47,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:47,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 273 [2023-09-01 08:33:47,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:49,756 INFO L130 PetriNetUnfolder]: 3996/6751 cut-off events. [2023-09-01 08:33:49,756 INFO L131 PetriNetUnfolder]: For 109147/109250 co-relation queries the response was YES. [2023-09-01 08:33:49,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49971 conditions, 6751 events. 3996/6751 cut-off events. For 109147/109250 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 46285 event pairs, 411 based on Foata normal form. 272/7018 useless extension candidates. Maximal degree in co-relation 49920. Up to 3250 conditions per place. [2023-09-01 08:33:49,801 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 241 selfloop transitions, 253 changer transitions 9/510 dead transitions. [2023-09-01 08:33:49,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 510 transitions, 8906 flow [2023-09-01 08:33:49,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 08:33:49,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 08:33:49,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2946 transitions. [2023-09-01 08:33:49,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597069597069597 [2023-09-01 08:33:49,806 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2946 transitions. [2023-09-01 08:33:49,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2946 transitions. [2023-09-01 08:33:49,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:33:49,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2946 transitions. [2023-09-01 08:33:49,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 98.2) internal successors, (2946), 30 states have internal predecessors, (2946), 0 states have call successors, (0), 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 08:33:49,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 273.0) internal successors, (8463), 31 states have internal predecessors, (8463), 0 states have call successors, (0), 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 08:33:49,818 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 273.0) internal successors, (8463), 31 states have internal predecessors, (8463), 0 states have call successors, (0), 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 08:33:49,818 INFO L175 Difference]: Start difference. First operand has 114 places, 175 transitions, 3072 flow. Second operand 30 states and 2946 transitions. [2023-09-01 08:33:49,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 510 transitions, 8906 flow [2023-09-01 08:33:49,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 510 transitions, 8736 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 08:33:49,890 INFO L231 Difference]: Finished difference. Result has 161 places, 357 transitions, 7220 flow [2023-09-01 08:33:49,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=2968, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=7220, PETRI_PLACES=161, PETRI_TRANSITIONS=357} [2023-09-01 08:33:49,891 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 124 predicate places. [2023-09-01 08:33:49,891 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 357 transitions, 7220 flow [2023-09-01 08:33:49,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 92.44444444444444) internal successors, (2496), 27 states have internal predecessors, (2496), 0 states have call successors, (0), 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 08:33:49,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:33:49,892 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:33:49,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 08:33:50,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:50,092 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:33:50,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:33:50,093 INFO L85 PathProgramCache]: Analyzing trace with hash -665209679, now seen corresponding path program 3 times [2023-09-01 08:33:50,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:33:50,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604240640] [2023-09-01 08:33:50,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:33:50,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:33:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:33:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:50,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:33:50,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604240640] [2023-09-01 08:33:50,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604240640] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:33:50,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399772379] [2023-09-01 08:33:50,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:33:50,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:33:50,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:33:50,835 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:33:50,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 08:33:50,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 08:33:50,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:33:50,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 45 conjunts are in the unsatisfiable core [2023-09-01 08:33:50,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:33:51,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 08:33:51,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:33:51,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 08:33:51,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:33:51,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 08:33:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:51,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:33:52,707 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:52,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 66 [2023-09-01 08:33:52,758 INFO L321 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2023-09-01 08:33:52,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 397 treesize of output 381 [2023-09-01 08:33:52,785 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:33:52,796 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:33:52,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 104 [2023-09-01 08:33:52,823 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-09-01 08:33:52,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 91 [2023-09-01 08:33:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:33:55,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399772379] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:33:55,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:33:55,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2023-09-01 08:33:55,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429597589] [2023-09-01 08:33:55,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:33:55,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 08:33:55,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:33:55,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 08:33:55,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=742, Unknown=2, NotChecked=0, Total=870 [2023-09-01 08:33:55,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 273 [2023-09-01 08:33:55,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 357 transitions, 7220 flow. Second operand has 30 states, 30 states have (on average 71.5) internal successors, (2145), 30 states have internal predecessors, (2145), 0 states have call successors, (0), 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 08:33:55,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:33:55,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 273 [2023-09-01 08:33:55,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:33:58,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 08:34:04,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:34:06,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:34:15,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:34:23,618 INFO L130 PetriNetUnfolder]: 11336/18013 cut-off events. [2023-09-01 08:34:23,618 INFO L131 PetriNetUnfolder]: For 396718/396718 co-relation queries the response was YES. [2023-09-01 08:34:23,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145413 conditions, 18013 events. 11336/18013 cut-off events. For 396718/396718 co-relation queries the response was YES. Maximal size of possible extension queue 937. Compared 126427 event pairs, 1350 based on Foata normal form. 370/18383 useless extension candidates. Maximal degree in co-relation 145342. Up to 8164 conditions per place. [2023-09-01 08:34:23,871 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 617 selfloop transitions, 909 changer transitions 25/1551 dead transitions. [2023-09-01 08:34:23,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1551 transitions, 29923 flow [2023-09-01 08:34:23,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-09-01 08:34:23,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2023-09-01 08:34:23,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 7661 transitions. [2023-09-01 08:34:23,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2806227106227106 [2023-09-01 08:34:23,882 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 7661 transitions. [2023-09-01 08:34:23,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 7661 transitions. [2023-09-01 08:34:23,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:34:23,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 7661 transitions. [2023-09-01 08:34:23,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 76.61) internal successors, (7661), 100 states have internal predecessors, (7661), 0 states have call successors, (0), 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 08:34:23,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 273.0) internal successors, (27573), 101 states have internal predecessors, (27573), 0 states have call successors, (0), 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 08:34:23,923 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 273.0) internal successors, (27573), 101 states have internal predecessors, (27573), 0 states have call successors, (0), 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 08:34:23,923 INFO L175 Difference]: Start difference. First operand has 161 places, 357 transitions, 7220 flow. Second operand 100 states and 7661 transitions. [2023-09-01 08:34:23,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1551 transitions, 29923 flow [2023-09-01 08:34:25,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 1551 transitions, 28111 flow, removed 839 selfloop flow, removed 4 redundant places. [2023-09-01 08:34:25,485 INFO L231 Difference]: Finished difference. Result has 312 places, 1175 transitions, 24915 flow [2023-09-01 08:34:25,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=6703, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=24915, PETRI_PLACES=312, PETRI_TRANSITIONS=1175} [2023-09-01 08:34:25,486 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 275 predicate places. [2023-09-01 08:34:25,486 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 1175 transitions, 24915 flow [2023-09-01 08:34:25,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 71.5) internal successors, (2145), 30 states have internal predecessors, (2145), 0 states have call successors, (0), 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 08:34:25,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:34:25,487 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:34:25,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 08:34:25,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:34:25,687 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:34:25,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:34:25,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1541597126, now seen corresponding path program 2 times [2023-09-01 08:34:25,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:34:25,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685231907] [2023-09-01 08:34:25,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:34:25,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:34:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:34:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:34:26,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:34:26,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685231907] [2023-09-01 08:34:26,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685231907] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:34:26,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443278622] [2023-09-01 08:34:26,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:34:26,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:34:26,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:34:26,548 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:34:26,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 08:34:26,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:34:26,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:34:26,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 08:34:26,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:34:26,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:34:26,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:34:26,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:34:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:34:27,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:34:28,869 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:34:28,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 105 [2023-09-01 08:34:28,896 INFO L321 Elim1Store]: treesize reduction 31, result has 31.1 percent of original size [2023-09-01 08:34:28,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 715 treesize of output 646 [2023-09-01 08:34:28,917 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:34:28,918 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:34:28,919 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:34:28,920 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:34:28,925 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:34:28,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 187 [2023-09-01 08:34:28,948 INFO L321 Elim1Store]: treesize reduction 37, result has 17.8 percent of original size [2023-09-01 08:34:28,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 213 treesize of output 159 [2023-09-01 08:34:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:34:29,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443278622] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:34:29,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:34:29,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-09-01 08:34:29,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791798667] [2023-09-01 08:34:29,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:34:29,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 08:34:29,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:34:29,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 08:34:29,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=690, Unknown=2, NotChecked=0, Total=930 [2023-09-01 08:34:30,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 273 [2023-09-01 08:34:30,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 1175 transitions, 24915 flow. Second operand has 31 states, 31 states have (on average 71.54838709677419) internal successors, (2218), 31 states have internal predecessors, (2218), 0 states have call successors, (0), 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 08:34:30,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:34:30,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 273 [2023-09-01 08:34:30,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:34:45,249 INFO L130 PetriNetUnfolder]: 13877/22547 cut-off events. [2023-09-01 08:34:45,249 INFO L131 PetriNetUnfolder]: For 1803148/1803148 co-relation queries the response was YES. [2023-09-01 08:34:45,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261393 conditions, 22547 events. 13877/22547 cut-off events. For 1803148/1803148 co-relation queries the response was YES. Maximal size of possible extension queue 1152. Compared 166399 event pairs, 1481 based on Foata normal form. 328/22875 useless extension candidates. Maximal degree in co-relation 261266. Up to 10481 conditions per place. [2023-09-01 08:34:45,600 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 804 selfloop transitions, 1214 changer transitions 18/2036 dead transitions. [2023-09-01 08:34:45,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 2036 transitions, 46423 flow [2023-09-01 08:34:45,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-09-01 08:34:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-09-01 08:34:45,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3154 transitions. [2023-09-01 08:34:45,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28178325739301346 [2023-09-01 08:34:45,606 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3154 transitions. [2023-09-01 08:34:45,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3154 transitions. [2023-09-01 08:34:45,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:34:45,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3154 transitions. [2023-09-01 08:34:45,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 76.92682926829268) internal successors, (3154), 41 states have internal predecessors, (3154), 0 states have call successors, (0), 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 08:34:45,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 273.0) internal successors, (11466), 42 states have internal predecessors, (11466), 0 states have call successors, (0), 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 08:34:45,622 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 273.0) internal successors, (11466), 42 states have internal predecessors, (11466), 0 states have call successors, (0), 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 08:34:45,622 INFO L175 Difference]: Start difference. First operand has 312 places, 1175 transitions, 24915 flow. Second operand 41 states and 3154 transitions. [2023-09-01 08:34:45,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 2036 transitions, 46423 flow [2023-09-01 08:34:54,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 2036 transitions, 40419 flow, removed 2947 selfloop flow, removed 13 redundant places. [2023-09-01 08:34:54,598 INFO L231 Difference]: Finished difference. Result has 360 places, 1774 transitions, 37580 flow [2023-09-01 08:34:54,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=20620, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=686, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=37580, PETRI_PLACES=360, PETRI_TRANSITIONS=1774} [2023-09-01 08:34:54,599 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 323 predicate places. [2023-09-01 08:34:54,599 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 1774 transitions, 37580 flow [2023-09-01 08:34:54,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 71.54838709677419) internal successors, (2218), 31 states have internal predecessors, (2218), 0 states have call successors, (0), 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 08:34:54,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:34:54,600 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:34:54,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 08:34:54,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:34:54,800 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:34:54,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:34:54,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1296655661, now seen corresponding path program 4 times [2023-09-01 08:34:54,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:34:54,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243512097] [2023-09-01 08:34:54,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:34:54,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:34:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:34:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:34:55,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:34:55,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243512097] [2023-09-01 08:34:55,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243512097] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:34:55,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635584965] [2023-09-01 08:34:55,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:34:55,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:34:55,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:34:55,444 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:34:55,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 08:34:55,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:34:55,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:34:55,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 08:34:55,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:34:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:34:55,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:34:56,055 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-09-01 08:34:56,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 213 treesize of output 184 [2023-09-01 08:34:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:34:56,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635584965] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:34:56,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:34:56,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 20 [2023-09-01 08:34:56,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952260336] [2023-09-01 08:34:56,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:34:56,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 08:34:56,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:34:56,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 08:34:56,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2023-09-01 08:34:57,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 273 [2023-09-01 08:34:57,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 1774 transitions, 37580 flow. Second operand has 22 states, 22 states have (on average 94.81818181818181) internal successors, (2086), 22 states have internal predecessors, (2086), 0 states have call successors, (0), 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 08:34:57,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:34:57,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 273 [2023-09-01 08:34:57,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:35:11,374 INFO L130 PetriNetUnfolder]: 16768/27367 cut-off events. [2023-09-01 08:35:11,374 INFO L131 PetriNetUnfolder]: For 2419565/2423808 co-relation queries the response was YES. [2023-09-01 08:35:11,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315667 conditions, 27367 events. 16768/27367 cut-off events. For 2419565/2423808 co-relation queries the response was YES. Maximal size of possible extension queue 1636. Compared 217013 event pairs, 4196 based on Foata normal form. 477/27189 useless extension candidates. Maximal degree in co-relation 315518. Up to 15258 conditions per place. [2023-09-01 08:35:11,843 INFO L137 encePairwiseOnDemand]: 261/273 looper letters, 1664 selfloop transitions, 671 changer transitions 31/2422 dead transitions. [2023-09-01 08:35:11,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 2422 transitions, 53868 flow [2023-09-01 08:35:11,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 08:35:11,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 08:35:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3091 transitions. [2023-09-01 08:35:11,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3652369136240104 [2023-09-01 08:35:11,847 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3091 transitions. [2023-09-01 08:35:11,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3091 transitions. [2023-09-01 08:35:11,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:35:11,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3091 transitions. [2023-09-01 08:35:11,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 99.70967741935483) internal successors, (3091), 31 states have internal predecessors, (3091), 0 states have call successors, (0), 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 08:35:11,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 273.0) internal successors, (8736), 32 states have internal predecessors, (8736), 0 states have call successors, (0), 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 08:35:11,859 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 273.0) internal successors, (8736), 32 states have internal predecessors, (8736), 0 states have call successors, (0), 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 08:35:11,859 INFO L175 Difference]: Start difference. First operand has 360 places, 1774 transitions, 37580 flow. Second operand 31 states and 3091 transitions. [2023-09-01 08:35:11,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 2422 transitions, 53868 flow [2023-09-01 08:35:26,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 2422 transitions, 51940 flow, removed 909 selfloop flow, removed 7 redundant places. [2023-09-01 08:35:26,311 INFO L231 Difference]: Finished difference. Result has 392 places, 2068 transitions, 44217 flow [2023-09-01 08:35:26,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=35849, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=44217, PETRI_PLACES=392, PETRI_TRANSITIONS=2068} [2023-09-01 08:35:26,313 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 355 predicate places. [2023-09-01 08:35:26,313 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 2068 transitions, 44217 flow [2023-09-01 08:35:26,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 94.81818181818181) internal successors, (2086), 22 states have internal predecessors, (2086), 0 states have call successors, (0), 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 08:35:26,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:35:26,314 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:35:26,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-09-01 08:35:26,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-09-01 08:35:26,514 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:35:26,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:35:26,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1628308683, now seen corresponding path program 1 times [2023-09-01 08:35:26,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:35:26,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804258068] [2023-09-01 08:35:26,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:35:26,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:35:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:35:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:35:27,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:35:27,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804258068] [2023-09-01 08:35:27,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804258068] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:35:27,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577704116] [2023-09-01 08:35:27,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:35:27,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:35:27,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:35:27,496 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:35:27,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 08:35:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:35:27,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 50 conjunts are in the unsatisfiable core [2023-09-01 08:35:27,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:35:27,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:35:27,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-09-01 08:35:27,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:35:27,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 08:35:27,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:35:27,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 08:35:28,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:35:28,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2023-09-01 08:35:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:35:28,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:35:28,291 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1013 (Array Int Int))) (< (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1013) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)) is different from false [2023-09-01 08:35:29,209 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:35:29,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 158 treesize of output 103 [2023-09-01 08:35:29,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:35:29,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 2061 treesize of output 1908 [2023-09-01 08:35:29,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2023-09-01 08:35:29,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:35:29,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 314 treesize of output 286 [2023-09-01 08:35:29,346 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:35:29,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 250 treesize of output 254 [2023-09-01 08:35:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:35:41,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577704116] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:35:41,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:35:41,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2023-09-01 08:35:41,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185837759] [2023-09-01 08:35:41,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:35:41,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 08:35:41,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:35:41,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 08:35:41,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=4, NotChecked=60, Total=1056 [2023-09-01 08:35:41,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 273 [2023-09-01 08:35:41,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 2068 transitions, 44217 flow. Second operand has 33 states, 33 states have (on average 68.45454545454545) internal successors, (2259), 33 states have internal predecessors, (2259), 0 states have call successors, (0), 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 08:35:41,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:35:41,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 273 [2023-09-01 08:35:41,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:35:50,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:35:53,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:35:58,892 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_1013 (Array Int Int))) (< (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1013) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)))) (and (or .cse0 (let ((.cse1 (< 2147483646 c_~back~0)) (.cse2 (= (mod |c_thread2Thread1of1ForFork0_~b~0#1| 256) 0)) (.cse3 (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))))) (and (or .cse1 (not .cse2) (not (= (+ .cse3 1) 0))) (or .cse1 .cse2 (not (= .cse3 1))))) (<= c_~n~0 c_~back~0) (< c_~back~0 0)) .cse0)) is different from false [2023-09-01 08:36:09,132 WARN L222 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 171 DAG size of output: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:36:12,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:36:34,326 INFO L130 PetriNetUnfolder]: 29855/47651 cut-off events. [2023-09-01 08:36:34,327 INFO L131 PetriNetUnfolder]: For 5122438/5122438 co-relation queries the response was YES. [2023-09-01 08:36:35,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 600908 conditions, 47651 events. 29855/47651 cut-off events. For 5122438/5122438 co-relation queries the response was YES. Maximal size of possible extension queue 2215. Compared 379875 event pairs, 3321 based on Foata normal form. 2078/49729 useless extension candidates. Maximal degree in co-relation 600749. Up to 21863 conditions per place. [2023-09-01 08:36:35,724 INFO L137 encePairwiseOnDemand]: 257/273 looper letters, 2012 selfloop transitions, 2591 changer transitions 93/4696 dead transitions. [2023-09-01 08:36:35,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 4696 transitions, 112114 flow [2023-09-01 08:36:35,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-09-01 08:36:35,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-09-01 08:36:35,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4725 transitions. [2023-09-01 08:36:35,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2704326923076923 [2023-09-01 08:36:35,730 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4725 transitions. [2023-09-01 08:36:35,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4725 transitions. [2023-09-01 08:36:35,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:36:35,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4725 transitions. [2023-09-01 08:36:35,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 73.828125) internal successors, (4725), 64 states have internal predecessors, (4725), 0 states have call successors, (0), 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 08:36:35,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 273.0) internal successors, (17745), 65 states have internal predecessors, (17745), 0 states have call successors, (0), 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 08:36:35,750 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 273.0) internal successors, (17745), 65 states have internal predecessors, (17745), 0 states have call successors, (0), 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 08:36:35,750 INFO L175 Difference]: Start difference. First operand has 392 places, 2068 transitions, 44217 flow. Second operand 64 states and 4725 transitions. [2023-09-01 08:36:35,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 4696 transitions, 112114 flow [2023-09-01 08:37:16,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 4696 transitions, 109430 flow, removed 983 selfloop flow, removed 9 redundant places. [2023-09-01 08:37:17,074 INFO L231 Difference]: Finished difference. Result has 471 places, 3693 transitions, 90221 flow [2023-09-01 08:37:17,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=40092, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1913, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1003, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=758, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=90221, PETRI_PLACES=471, PETRI_TRANSITIONS=3693} [2023-09-01 08:37:17,078 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 434 predicate places. [2023-09-01 08:37:17,078 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 3693 transitions, 90221 flow [2023-09-01 08:37:17,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 68.45454545454545) internal successors, (2259), 33 states have internal predecessors, (2259), 0 states have call successors, (0), 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 08:37:17,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:37:17,079 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:37:17,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 08:37:17,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-09-01 08:37:17,285 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:37:17,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:37:17,286 INFO L85 PathProgramCache]: Analyzing trace with hash 13853192, now seen corresponding path program 1 times [2023-09-01 08:37:17,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:37:17,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400616797] [2023-09-01 08:37:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:37:17,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:37:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:37:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:37:18,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:37:18,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400616797] [2023-09-01 08:37:18,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400616797] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:37:18,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198757919] [2023-09-01 08:37:18,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:37:18,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:37:18,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:37:18,125 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:37:18,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 08:37:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:37:18,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 44 conjunts are in the unsatisfiable core [2023-09-01 08:37:18,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:37:18,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 08:37:18,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:37:18,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 08:37:18,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:37:18,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 08:37:18,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:37:18,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 32 [2023-09-01 08:37:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:37:19,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:37:19,743 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:37:19,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 73 [2023-09-01 08:37:19,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:37:19,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1051 treesize of output 1011 [2023-09-01 08:37:19,803 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:37:19,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 167 treesize of output 147 [2023-09-01 08:37:19,826 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:37:19,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 129 treesize of output 128 [2023-09-01 08:37:20,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:37:20,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 58 [2023-09-01 08:37:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:37:21,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198757919] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:37:21,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:37:21,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2023-09-01 08:37:21,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425032803] [2023-09-01 08:37:21,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:37:21,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 08:37:21,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:37:21,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 08:37:21,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=907, Unknown=7, NotChecked=0, Total=1056 [2023-09-01 08:37:23,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:37:27,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:37:27,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 273 [2023-09-01 08:37:27,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 3693 transitions, 90221 flow. Second operand has 33 states, 33 states have (on average 68.45454545454545) internal successors, (2259), 33 states have internal predecessors, (2259), 0 states have call successors, (0), 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 08:37:27,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:37:27,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 273 [2023-09-01 08:37:27,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:37:41,680 WARN L222 SmtUtils]: Spent 10.31s on a formula simplification. DAG size of input: 119 DAG size of output: 94 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:37:44,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:37:46,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:37:48,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:38:03,358 WARN L222 SmtUtils]: Spent 14.43s on a formula simplification. DAG size of input: 136 DAG size of output: 109 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:38:05,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:38:11,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:38:19,538 WARN L222 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 96 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:38:29,599 WARN L222 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 118 DAG size of output: 93 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:38:32,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:38:42,633 WARN L222 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:38:46,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:38:58,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:39:01,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:39:45,670 INFO L130 PetriNetUnfolder]: 36048/57587 cut-off events. [2023-09-01 08:39:45,671 INFO L131 PetriNetUnfolder]: For 6332801/6332801 co-relation queries the response was YES. [2023-09-01 08:39:47,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803825 conditions, 57587 events. 36048/57587 cut-off events. For 6332801/6332801 co-relation queries the response was YES. Maximal size of possible extension queue 2721. Compared 474729 event pairs, 8166 based on Foata normal form. 803/58390 useless extension candidates. Maximal degree in co-relation 803643. Up to 35107 conditions per place. [2023-09-01 08:39:47,503 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 3214 selfloop transitions, 2041 changer transitions 82/5337 dead transitions. [2023-09-01 08:39:47,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 5337 transitions, 137624 flow [2023-09-01 08:39:47,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-09-01 08:39:47,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-09-01 08:39:47,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 4120 transitions. [2023-09-01 08:39:47,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26949241234955523 [2023-09-01 08:39:47,507 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 4120 transitions. [2023-09-01 08:39:47,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 4120 transitions. [2023-09-01 08:39:47,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:39:47,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 4120 transitions. [2023-09-01 08:39:47,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 73.57142857142857) internal successors, (4120), 56 states have internal predecessors, (4120), 0 states have call successors, (0), 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 08:39:47,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 273.0) internal successors, (15561), 57 states have internal predecessors, (15561), 0 states have call successors, (0), 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 08:39:47,521 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 273.0) internal successors, (15561), 57 states have internal predecessors, (15561), 0 states have call successors, (0), 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 08:39:47,522 INFO L175 Difference]: Start difference. First operand has 471 places, 3693 transitions, 90221 flow. Second operand 56 states and 4120 transitions. [2023-09-01 08:39:47,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 5337 transitions, 137624 flow [2023-09-01 08:41:08,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 5337 transitions, 126008 flow, removed 5783 selfloop flow, removed 11 redundant places. [2023-09-01 08:41:08,570 INFO L231 Difference]: Finished difference. Result has 542 places, 4605 transitions, 109060 flow [2023-09-01 08:41:08,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=81078, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1962, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=109060, PETRI_PLACES=542, PETRI_TRANSITIONS=4605} [2023-09-01 08:41:08,574 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 505 predicate places. [2023-09-01 08:41:08,575 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 4605 transitions, 109060 flow [2023-09-01 08:41:08,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 68.45454545454545) internal successors, (2259), 33 states have internal predecessors, (2259), 0 states have call successors, (0), 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 08:41:08,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:41:08,576 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:41:08,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 08:41:08,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:41:08,781 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:41:08,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:41:08,781 INFO L85 PathProgramCache]: Analyzing trace with hash 240982344, now seen corresponding path program 2 times [2023-09-01 08:41:08,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:41:08,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623929587] [2023-09-01 08:41:08,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:41:08,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:41:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:41:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:41:09,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:41:09,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623929587] [2023-09-01 08:41:09,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623929587] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:41:09,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278577837] [2023-09-01 08:41:09,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:41:09,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:41:09,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:41:09,683 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:41:09,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 08:41:09,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:41:09,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:41:09,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 51 conjunts are in the unsatisfiable core [2023-09-01 08:41:09,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:41:09,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:41:10,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:41:10,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 08:41:10,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:41:10,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 08:41:10,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:41:10,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2023-09-01 08:41:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:41:10,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:41:11,145 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:41:11,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 70 [2023-09-01 08:41:11,176 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:41:11,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 4011 treesize of output 3639 [2023-09-01 08:41:11,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 183 [2023-09-01 08:41:11,236 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:41:11,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 247 treesize of output 215 [2023-09-01 08:41:11,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:41:11,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 134 treesize of output 127 [2023-09-01 08:41:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:41:13,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278577837] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:41:13,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:41:13,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2023-09-01 08:41:13,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204980701] [2023-09-01 08:41:13,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:41:13,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-09-01 08:41:13,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:41:13,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-09-01 08:41:13,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=970, Unknown=3, NotChecked=0, Total=1122 [2023-09-01 08:41:15,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 273 [2023-09-01 08:41:15,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 4605 transitions, 109060 flow. Second operand has 34 states, 34 states have (on average 68.41176470588235) internal successors, (2326), 34 states have internal predecessors, (2326), 0 states have call successors, (0), 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 08:41:15,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:41:15,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 273 [2023-09-01 08:41:15,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:41:18,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:41:20,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:41:23,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:41:25,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:41:30,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:41:32,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:41:35,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:41:43,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:41:56,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:41:58,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:42:01,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:43:11,340 INFO L130 PetriNetUnfolder]: 50794/82464 cut-off events. [2023-09-01 08:43:11,340 INFO L131 PetriNetUnfolder]: For 9573385/9573385 co-relation queries the response was YES. [2023-09-01 08:43:13,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132124 conditions, 82464 events. 50794/82464 cut-off events. For 9573385/9573385 co-relation queries the response was YES. Maximal size of possible extension queue 3840. Compared 722700 event pairs, 4932 based on Foata normal form. 5018/87482 useless extension candidates. Maximal degree in co-relation 1131916. Up to 34081 conditions per place. [2023-09-01 08:43:14,266 INFO L137 encePairwiseOnDemand]: 260/273 looper letters, 2846 selfloop transitions, 4890 changer transitions 46/7782 dead transitions. [2023-09-01 08:43:14,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 7782 transitions, 192796 flow [2023-09-01 08:43:14,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-09-01 08:43:14,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-09-01 08:43:14,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 4245 transitions. [2023-09-01 08:43:14,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27279737806053594 [2023-09-01 08:43:14,271 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 4245 transitions. [2023-09-01 08:43:14,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 4245 transitions. [2023-09-01 08:43:14,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:43:14,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 4245 transitions. [2023-09-01 08:43:14,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 74.47368421052632) internal successors, (4245), 57 states have internal predecessors, (4245), 0 states have call successors, (0), 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 08:43:14,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 273.0) internal successors, (15834), 58 states have internal predecessors, (15834), 0 states have call successors, (0), 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 08:43:14,286 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 273.0) internal successors, (15834), 58 states have internal predecessors, (15834), 0 states have call successors, (0), 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 08:43:14,286 INFO L175 Difference]: Start difference. First operand has 542 places, 4605 transitions, 109060 flow. Second operand 57 states and 4245 transitions. [2023-09-01 08:43:14,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 595 places, 7782 transitions, 192796 flow [2023-09-01 08:45:33,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 7782 transitions, 189953 flow, removed 1326 selfloop flow, removed 18 redundant places. [2023-09-01 08:45:34,128 INFO L231 Difference]: Finished difference. Result has 610 places, 6761 transitions, 175763 flow [2023-09-01 08:45:34,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=97516, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2743, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=175763, PETRI_PLACES=610, PETRI_TRANSITIONS=6761} [2023-09-01 08:45:34,131 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 573 predicate places. [2023-09-01 08:45:34,131 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 6761 transitions, 175763 flow [2023-09-01 08:45:34,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 68.41176470588235) internal successors, (2326), 34 states have internal predecessors, (2326), 0 states have call successors, (0), 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 08:45:34,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:45:34,132 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:45:34,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 08:45:34,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:45:34,333 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-09-01 08:45:34,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:45:34,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1024129333, now seen corresponding path program 5 times [2023-09-01 08:45:34,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:45:34,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141509144] [2023-09-01 08:45:34,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:45:34,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:45:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:45:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:45:35,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:45:35,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141509144] [2023-09-01 08:45:35,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141509144] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:45:35,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430713799] [2023-09-01 08:45:35,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 08:45:35,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:45:35,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:45:35,455 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:45:35,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 08:45:35,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 08:45:35,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:45:35,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 08:45:35,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:45:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:45:35,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:45:36,232 INFO L321 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-09-01 08:45:36,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 213 treesize of output 176 [2023-09-01 08:45:36,704 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 08:45:36,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430713799] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:45:36,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:45:36,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 5] total 23 [2023-09-01 08:45:36,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910897592] [2023-09-01 08:45:36,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:45:36,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 08:45:36,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:45:36,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 08:45:36,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2023-09-01 08:45:37,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 273 [2023-09-01 08:45:37,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 6761 transitions, 175763 flow. Second operand has 25 states, 25 states have (on average 89.6) internal successors, (2240), 25 states have internal predecessors, (2240), 0 states have call successors, (0), 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 08:45:37,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:45:37,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 273 [2023-09-01 08:45:37,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15