./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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-more-queue-add-3-nl.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 c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 11:48:29,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 11:48:29,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 11:48:29,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 11:48:29,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 11:48:29,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 11:48:29,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 11:48:29,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 11:48:29,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 11:48:29,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 11:48:29,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 11:48:29,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 11:48:29,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 11:48:29,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 11:48:29,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 11:48:29,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 11:48:29,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 11:48:29,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 11:48:29,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 11:48:29,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 11:48:29,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 11:48:29,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 11:48:29,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 11:48:29,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 11:48:29,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 11:48:29,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 11:48:29,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 11:48:29,622 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 11:48:29,622 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 11:48:29,623 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 11:48:29,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 11:48:29,629 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 11:48:29,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 11:48:29,631 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 11:48:29,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 11:48:29,632 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 11:48:29,633 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 11:48:29,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 11:48:29,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 11:48:29,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 11:48:29,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 11:48:29,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 11:48:29,678 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 11:48:29,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 11:48:29,680 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 11:48:29,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 11:48:29,681 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 11:48:29,681 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 11:48:29,682 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 11:48:29,682 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 11:48:29,682 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 11:48:29,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 11:48:29,683 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 11:48:29,683 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 11:48:29,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 11:48:29,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 11:48:29,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 11:48:29,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 11:48:29,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 11:48:29,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 11:48:29,684 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 11:48:29,684 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 11:48:29,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 11:48:29,685 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 11:48:29,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 11:48:29,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 11:48:29,685 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 11:48:29,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 11:48:29,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:48:29,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 11:48:29,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 11:48:29,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 11:48:29,686 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 11:48:29,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 11:48:29,687 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 11:48:29,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 11:48:29,687 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 11:48:29,687 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 11:48:29,687 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 11:48:29,688 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 11:48:30,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 11:48:30,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 11:48:30,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 11:48:30,023 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 11:48:30,024 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 11:48:30,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-08-30 11:48:31,170 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 11:48:31,405 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 11:48:31,405 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-08-30 11:48:31,411 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/513b3d5ad/ad396180886442a1b3614334e945f33b/FLAGc6bcd3298 [2023-08-30 11:48:31,424 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/513b3d5ad/ad396180886442a1b3614334e945f33b [2023-08-30 11:48:31,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 11:48:31,427 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 11:48:31,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 11:48:31,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 11:48:31,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 11:48:31,433 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:48:31" (1/1) ... [2023-08-30 11:48:31,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71da064e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:31, skipping insertion in model container [2023-08-30 11:48:31,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:48:31" (1/1) ... [2023-08-30 11:48:31,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 11:48:31,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 11:48:31,661 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-more-queue-add-3-nl.wvr.c[3615,3628] [2023-08-30 11:48:31,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:48:31,679 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 11:48:31,726 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-more-queue-add-3-nl.wvr.c[3615,3628] [2023-08-30 11:48:31,730 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:48:31,741 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:48:31,743 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:48:31,749 INFO L208 MainTranslator]: Completed translation [2023-08-30 11:48:31,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:31 WrapperNode [2023-08-30 11:48:31,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 11:48:31,751 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 11:48:31,751 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 11:48:31,752 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 11:48:31,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:31" (1/1) ... [2023-08-30 11:48:31,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:31" (1/1) ... [2023-08-30 11:48:31,809 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 285 [2023-08-30 11:48:31,812 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 11:48:31,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 11:48:31,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 11:48:31,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 11:48:31,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:31" (1/1) ... [2023-08-30 11:48:31,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:31" (1/1) ... [2023-08-30 11:48:31,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:31" (1/1) ... [2023-08-30 11:48:31,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:31" (1/1) ... [2023-08-30 11:48:31,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:31" (1/1) ... [2023-08-30 11:48:31,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:31" (1/1) ... [2023-08-30 11:48:31,862 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:31" (1/1) ... [2023-08-30 11:48:31,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:31" (1/1) ... [2023-08-30 11:48:31,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 11:48:31,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 11:48:31,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 11:48:31,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 11:48:31,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:31" (1/1) ... [2023-08-30 11:48:31,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:48:31,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:48:31,902 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) [2023-08-30 11:48:31,922 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 [2023-08-30 11:48:31,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 11:48:31,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 11:48:31,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 11:48:31,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 11:48:31,941 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 11:48:31,941 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 11:48:31,941 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 11:48:31,941 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 11:48:31,942 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 11:48:31,942 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 11:48:31,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 11:48:31,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 11:48:31,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 11:48:31,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 11:48:31,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 11:48:31,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 11:48:31,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 11:48:31,944 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 11:48:32,104 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 11:48:32,106 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 11:48:32,526 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 11:48:32,662 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 11:48:32,665 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-30 11:48:32,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:48:32 BoogieIcfgContainer [2023-08-30 11:48:32,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 11:48:32,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 11:48:32,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 11:48:32,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 11:48:32,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:48:31" (1/3) ... [2023-08-30 11:48:32,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746e15c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:48:32, skipping insertion in model container [2023-08-30 11:48:32,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:31" (2/3) ... [2023-08-30 11:48:32,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746e15c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:48:32, skipping insertion in model container [2023-08-30 11:48:32,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:48:32" (3/3) ... [2023-08-30 11:48:32,675 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2023-08-30 11:48:32,683 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 11:48:32,689 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 11:48:32,689 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-08-30 11:48:32,689 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 11:48:32,771 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 11:48:32,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 242 transitions, 508 flow [2023-08-30 11:48:32,905 INFO L130 PetriNetUnfolder]: 18/239 cut-off events. [2023-08-30 11:48:32,905 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 11:48:32,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 239 events. 18/239 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 241 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 197. Up to 3 conditions per place. [2023-08-30 11:48:32,914 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 242 transitions, 508 flow [2023-08-30 11:48:32,922 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 214 places, 221 transitions, 457 flow [2023-08-30 11:48:32,927 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 11:48:32,939 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 214 places, 221 transitions, 457 flow [2023-08-30 11:48:32,941 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 214 places, 221 transitions, 457 flow [2023-08-30 11:48:32,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 214 places, 221 transitions, 457 flow [2023-08-30 11:48:32,980 INFO L130 PetriNetUnfolder]: 17/221 cut-off events. [2023-08-30 11:48:32,980 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 11:48:32,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 221 events. 17/221 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 240 event pairs, 0 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 197. Up to 3 conditions per place. [2023-08-30 11:48:32,984 INFO L119 LiptonReduction]: Number of co-enabled transitions 3852 [2023-08-30 11:48:41,604 INFO L134 LiptonReduction]: Checked pairs total: 7130 [2023-08-30 11:48:41,605 INFO L136 LiptonReduction]: Total number of compositions: 236 [2023-08-30 11:48:41,617 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 11:48:41,622 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;@4478ab5c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 11:48:41,622 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-08-30 11:48:41,625 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 11:48:41,625 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 11:48:41,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:41,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 11:48:41,626 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:48:41,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:41,630 INFO L85 PathProgramCache]: Analyzing trace with hash 35337, now seen corresponding path program 1 times [2023-08-30 11:48:41,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:41,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127147256] [2023-08-30 11:48:41,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:41,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:41,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:41,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127147256] [2023-08-30 11:48:41,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127147256] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:48:41,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:48:41,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:48:41,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601432775] [2023-08-30 11:48:41,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:48:41,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:48:41,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:41,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:48:41,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:48:41,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 478 [2023-08-30 11:48:41,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:41,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:41,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 478 [2023-08-30 11:48:41,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:42,858 INFO L130 PetriNetUnfolder]: 5377/7199 cut-off events. [2023-08-30 11:48:42,858 INFO L131 PetriNetUnfolder]: For 368/368 co-relation queries the response was YES. [2023-08-30 11:48:42,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14765 conditions, 7199 events. 5377/7199 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 36812 event pairs, 3536 based on Foata normal form. 0/2781 useless extension candidates. Maximal degree in co-relation 6685. Up to 3602 conditions per place. [2023-08-30 11:48:42,911 INFO L137 encePairwiseOnDemand]: 464/478 looper letters, 69 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2023-08-30 11:48:42,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 74 transitions, 324 flow [2023-08-30 11:48:42,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:48:42,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:48:42,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 692 transitions. [2023-08-30 11:48:42,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4825662482566248 [2023-08-30 11:48:42,931 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 692 transitions. [2023-08-30 11:48:42,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 692 transitions. [2023-08-30 11:48:42,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:42,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 692 transitions. [2023-08-30 11:48:42,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:42,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:42,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:42,954 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 107 flow. Second operand 3 states and 692 transitions. [2023-08-30 11:48:42,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 74 transitions, 324 flow [2023-08-30 11:48:42,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 74 transitions, 306 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 11:48:42,966 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 122 flow [2023-08-30 11:48:42,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-08-30 11:48:42,974 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2023-08-30 11:48:42,976 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 122 flow [2023-08-30 11:48:42,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:42,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:42,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 11:48:42,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 11:48:42,978 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:48:42,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:42,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1097459, now seen corresponding path program 1 times [2023-08-30 11:48:42,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:42,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711164838] [2023-08-30 11:48:42,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:42,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:43,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:43,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711164838] [2023-08-30 11:48:43,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711164838] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:48:43,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:48:43,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:48:43,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890624132] [2023-08-30 11:48:43,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:48:43,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:48:43,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:43,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:48:43,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:48:43,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 478 [2023-08-30 11:48:43,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:43,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:43,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 478 [2023-08-30 11:48:43,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:43,948 INFO L130 PetriNetUnfolder]: 5377/7197 cut-off events. [2023-08-30 11:48:43,948 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2023-08-30 11:48:43,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14649 conditions, 7197 events. 5377/7197 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 36610 event pairs, 3536 based on Foata normal form. 0/2785 useless extension candidates. Maximal degree in co-relation 7313. Up to 7195 conditions per place. [2023-08-30 11:48:43,993 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 39 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-30 11:48:43,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 194 flow [2023-08-30 11:48:43,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:48:43,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:48:43,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 642 transitions. [2023-08-30 11:48:43,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476987447698745 [2023-08-30 11:48:43,996 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 642 transitions. [2023-08-30 11:48:43,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 642 transitions. [2023-08-30 11:48:43,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:43,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 642 transitions. [2023-08-30 11:48:43,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:44,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:44,003 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:44,003 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 122 flow. Second operand 3 states and 642 transitions. [2023-08-30 11:48:44,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 194 flow [2023-08-30 11:48:44,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 11:48:44,006 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 108 flow [2023-08-30 11:48:44,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-08-30 11:48:44,007 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -8 predicate places. [2023-08-30 11:48:44,007 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 108 flow [2023-08-30 11:48:44,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:44,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:44,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 11:48:44,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 11:48:44,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:48:44,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:44,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1097490, now seen corresponding path program 1 times [2023-08-30 11:48:44,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:44,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737502641] [2023-08-30 11:48:44,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:44,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:44,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:44,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:44,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:44,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737502641] [2023-08-30 11:48:44,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737502641] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:48:44,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910738785] [2023-08-30 11:48:44,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:44,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:48:44,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:48:44,122 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) [2023-08-30 11:48:44,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 11:48:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:44,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:48:44,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:48:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:44,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:48:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:44,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910738785] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:48:44,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:48:44,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 11:48:44,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978180724] [2023-08-30 11:48:44,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:48:44,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:48:44,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:44,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:48:44,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:48:44,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 478 [2023-08-30 11:48:44,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 108 flow. Second operand has 7 states, 7 states have (on average 202.14285714285714) internal successors, (1415), 7 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:44,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:44,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 478 [2023-08-30 11:48:44,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:46,317 INFO L130 PetriNetUnfolder]: 13441/17988 cut-off events. [2023-08-30 11:48:46,317 INFO L131 PetriNetUnfolder]: For 200/200 co-relation queries the response was YES. [2023-08-30 11:48:46,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36594 conditions, 17988 events. 13441/17988 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 1223. Compared 101501 event pairs, 8840 based on Foata normal form. 0/6956 useless extension candidates. Maximal degree in co-relation 36586. Up to 3600 conditions per place. [2023-08-30 11:48:46,397 INFO L137 encePairwiseOnDemand]: 472/478 looper letters, 160 selfloop transitions, 13 changer transitions 0/174 dead transitions. [2023-08-30 11:48:46,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 174 transitions, 762 flow [2023-08-30 11:48:46,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 11:48:46,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 11:48:46,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1385 transitions. [2023-08-30 11:48:46,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4829149232914923 [2023-08-30 11:48:46,401 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1385 transitions. [2023-08-30 11:48:46,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1385 transitions. [2023-08-30 11:48:46,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:46,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1385 transitions. [2023-08-30 11:48:46,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 230.83333333333334) internal successors, (1385), 6 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:46,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:46,411 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:46,412 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 108 flow. Second operand 6 states and 1385 transitions. [2023-08-30 11:48:46,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 174 transitions, 762 flow [2023-08-30 11:48:46,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 174 transitions, 761 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:48:46,416 INFO L231 Difference]: Finished difference. Result has 49 places, 50 transitions, 200 flow [2023-08-30 11:48:46,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=49, PETRI_TRANSITIONS=50} [2023-08-30 11:48:46,418 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2023-08-30 11:48:46,418 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 50 transitions, 200 flow [2023-08-30 11:48:46,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 202.14285714285714) internal successors, (1415), 7 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:46,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:46,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:48:46,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 11:48:46,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:48:46,625 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:48:46,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:46,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1641809162, now seen corresponding path program 1 times [2023-08-30 11:48:46,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:46,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574426931] [2023-08-30 11:48:46,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:46,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:46,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:46,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574426931] [2023-08-30 11:48:46,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574426931] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:48:46,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:48:46,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:48:46,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637817876] [2023-08-30 11:48:46,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:48:46,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:48:46,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:46,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:48:46,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:48:46,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 478 [2023-08-30 11:48:46,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:46,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:46,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 478 [2023-08-30 11:48:46,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:48,670 INFO L130 PetriNetUnfolder]: 17121/24488 cut-off events. [2023-08-30 11:48:48,670 INFO L131 PetriNetUnfolder]: For 203/203 co-relation queries the response was YES. [2023-08-30 11:48:48,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49972 conditions, 24488 events. 17121/24488 cut-off events. For 203/203 co-relation queries the response was YES. Maximal size of possible extension queue 1238. Compared 152398 event pairs, 8845 based on Foata normal form. 0/11236 useless extension candidates. Maximal degree in co-relation 49960. Up to 15169 conditions per place. [2023-08-30 11:48:48,797 INFO L137 encePairwiseOnDemand]: 474/478 looper letters, 75 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-08-30 11:48:48,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 413 flow [2023-08-30 11:48:48,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:48:48,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:48:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2023-08-30 11:48:48,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4755927475592748 [2023-08-30 11:48:48,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2023-08-30 11:48:48,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2023-08-30 11:48:48,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:48,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2023-08-30 11:48:48,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:48,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:48,806 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:48,806 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 200 flow. Second operand 3 states and 682 transitions. [2023-08-30 11:48:48,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 413 flow [2023-08-30 11:48:48,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 394 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 11:48:48,809 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 195 flow [2023-08-30 11:48:48,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2023-08-30 11:48:48,810 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2023-08-30 11:48:48,811 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 195 flow [2023-08-30 11:48:48,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:48,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:48,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:48:48,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 11:48:48,812 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:48:48,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:48,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1641809190, now seen corresponding path program 1 times [2023-08-30 11:48:48,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:48,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750299500] [2023-08-30 11:48:48,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:48,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:48,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:48,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750299500] [2023-08-30 11:48:48,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750299500] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:48:48,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:48:48,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:48:48,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053341568] [2023-08-30 11:48:48,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:48:48,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:48:48,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:48,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:48:48,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 11:48:48,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 478 [2023-08-30 11:48:48,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 195 flow. Second operand has 4 states, 4 states have (on average 198.25) internal successors, (793), 4 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:48,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:48,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 478 [2023-08-30 11:48:48,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:50,514 INFO L130 PetriNetUnfolder]: 15886/22854 cut-off events. [2023-08-30 11:48:50,514 INFO L131 PetriNetUnfolder]: For 1694/2404 co-relation queries the response was YES. [2023-08-30 11:48:50,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49504 conditions, 22854 events. 15886/22854 cut-off events. For 1694/2404 co-relation queries the response was YES. Maximal size of possible extension queue 1398. Compared 145976 event pairs, 13490 based on Foata normal form. 1080/12413 useless extension candidates. Maximal degree in co-relation 49491. Up to 22547 conditions per place. [2023-08-30 11:48:50,614 INFO L137 encePairwiseOnDemand]: 469/478 looper letters, 66 selfloop transitions, 3 changer transitions 1/71 dead transitions. [2023-08-30 11:48:50,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 406 flow [2023-08-30 11:48:50,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:48:50,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:48:50,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 849 transitions. [2023-08-30 11:48:50,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4440376569037657 [2023-08-30 11:48:50,618 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 849 transitions. [2023-08-30 11:48:50,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 849 transitions. [2023-08-30 11:48:50,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:50,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 849 transitions. [2023-08-30 11:48:50,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 212.25) internal successors, (849), 4 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:50,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 478.0) internal successors, (2390), 5 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:50,624 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 478.0) internal successors, (2390), 5 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:50,624 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 195 flow. Second operand 4 states and 849 transitions. [2023-08-30 11:48:50,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 406 flow [2023-08-30 11:48:50,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 71 transitions, 404 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:48:50,627 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 212 flow [2023-08-30 11:48:50,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2023-08-30 11:48:50,627 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2023-08-30 11:48:50,628 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 212 flow [2023-08-30 11:48:50,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 198.25) internal successors, (793), 4 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:50,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:50,628 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 11:48:50,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 11:48:50,629 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:48:50,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:50,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1663339352, now seen corresponding path program 2 times [2023-08-30 11:48:50,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:50,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259315820] [2023-08-30 11:48:50,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:50,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:50,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:50,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:50,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259315820] [2023-08-30 11:48:50,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259315820] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:48:50,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939367485] [2023-08-30 11:48:50,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:48:50,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:48:50,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:48:50,725 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) [2023-08-30 11:48:50,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 11:48:50,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:48:50,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:48:50,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 11:48:50,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:48:50,829 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:48:50,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:48:50,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939367485] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:48:50,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:48:50,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 11:48:50,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908382679] [2023-08-30 11:48:50,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:48:50,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:48:50,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:50,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:48:50,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:48:50,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 478 [2023-08-30 11:48:50,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:50,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:50,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 478 [2023-08-30 11:48:50,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:52,586 INFO L130 PetriNetUnfolder]: 15886/22853 cut-off events. [2023-08-30 11:48:52,587 INFO L131 PetriNetUnfolder]: For 4429/5139 co-relation queries the response was YES. [2023-08-30 11:48:52,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54562 conditions, 22853 events. 15886/22853 cut-off events. For 4429/5139 co-relation queries the response was YES. Maximal size of possible extension queue 1484. Compared 147055 event pairs, 13490 based on Foata normal form. 711/12043 useless extension candidates. Maximal degree in co-relation 54547. Up to 22838 conditions per place. [2023-08-30 11:48:52,738 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 43 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2023-08-30 11:48:52,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 50 transitions, 300 flow [2023-08-30 11:48:52,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:48:52,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:48:52,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 646 transitions. [2023-08-30 11:48:52,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4504881450488145 [2023-08-30 11:48:52,741 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 646 transitions. [2023-08-30 11:48:52,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 646 transitions. [2023-08-30 11:48:52,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:52,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 646 transitions. [2023-08-30 11:48:52,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:52,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:52,747 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:52,747 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 212 flow. Second operand 3 states and 646 transitions. [2023-08-30 11:48:52,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 50 transitions, 300 flow [2023-08-30 11:48:52,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 50 transitions, 294 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 11:48:52,750 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 208 flow [2023-08-30 11:48:52,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2023-08-30 11:48:52,751 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2023-08-30 11:48:52,751 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 208 flow [2023-08-30 11:48:52,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:52,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:52,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:48:52,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 11:48:52,956 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,SelfDestructingSolverStorable5 [2023-08-30 11:48:52,957 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:48:52,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:52,957 INFO L85 PathProgramCache]: Analyzing trace with hash -2381116, now seen corresponding path program 1 times [2023-08-30 11:48:52,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:52,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909724109] [2023-08-30 11:48:52,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:52,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:53,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:53,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909724109] [2023-08-30 11:48:53,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909724109] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:48:53,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451625531] [2023-08-30 11:48:53,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:53,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:48:53,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:48:53,098 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) [2023-08-30 11:48:53,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 11:48:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:53,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:48:53,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:48:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:48:53,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:48:53,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451625531] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:48:53,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:48:53,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-30 11:48:53,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554796592] [2023-08-30 11:48:53,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:48:53,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:48:53,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:53,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:48:53,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 11:48:53,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 478 [2023-08-30 11:48:53,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:53,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:53,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 478 [2023-08-30 11:48:53,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:54,010 INFO L130 PetriNetUnfolder]: 9146/13293 cut-off events. [2023-08-30 11:48:54,010 INFO L131 PetriNetUnfolder]: For 3792/4432 co-relation queries the response was YES. [2023-08-30 11:48:54,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31175 conditions, 13293 events. 9146/13293 cut-off events. For 3792/4432 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 78508 event pairs, 7500 based on Foata normal form. 640/8373 useless extension candidates. Maximal degree in co-relation 31159. Up to 13283 conditions per place. [2023-08-30 11:48:54,079 INFO L137 encePairwiseOnDemand]: 474/478 looper letters, 45 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-08-30 11:48:54,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 288 flow [2023-08-30 11:48:54,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:48:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:48:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 651 transitions. [2023-08-30 11:48:54,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45397489539748953 [2023-08-30 11:48:54,081 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 651 transitions. [2023-08-30 11:48:54,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 651 transitions. [2023-08-30 11:48:54,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:54,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 651 transitions. [2023-08-30 11:48:54,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:54,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:54,086 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:54,086 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 208 flow. Second operand 3 states and 651 transitions. [2023-08-30 11:48:54,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 288 flow [2023-08-30 11:48:54,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 47 transitions, 276 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 11:48:54,089 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 186 flow [2023-08-30 11:48:54,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2023-08-30 11:48:54,089 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2023-08-30 11:48:54,090 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 186 flow [2023-08-30 11:48:54,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:54,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:54,090 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 11:48:54,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 11:48:54,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:48:54,296 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:48:54,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:54,296 INFO L85 PathProgramCache]: Analyzing trace with hash 629787670, now seen corresponding path program 1 times [2023-08-30 11:48:54,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:54,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831004601] [2023-08-30 11:48:54,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:54,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:54,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:54,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831004601] [2023-08-30 11:48:54,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831004601] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:48:54,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765899538] [2023-08-30 11:48:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:54,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:48:54,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:48:54,407 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) [2023-08-30 11:48:54,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 11:48:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:54,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 11:48:54,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:48:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:54,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:48:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:54,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765899538] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:48:54,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:48:54,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 11:48:54,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385342492] [2023-08-30 11:48:54,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:48:54,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 11:48:54,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:54,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 11:48:54,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 11:48:54,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 478 [2023-08-30 11:48:54,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 186 flow. Second operand has 13 states, 13 states have (on average 202.15384615384616) internal successors, (2628), 13 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:54,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:54,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 478 [2023-08-30 11:48:54,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:56,964 INFO L130 PetriNetUnfolder]: 20120/29241 cut-off events. [2023-08-30 11:48:56,965 INFO L131 PetriNetUnfolder]: For 8360/9768 co-relation queries the response was YES. [2023-08-30 11:48:57,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68538 conditions, 29241 events. 20120/29241 cut-off events. For 8360/9768 co-relation queries the response was YES. Maximal size of possible extension queue 972. Compared 183760 event pairs, 16500 based on Foata normal form. 1420/18422 useless extension candidates. Maximal degree in co-relation 68522. Up to 4489 conditions per place. [2023-08-30 11:48:57,111 INFO L137 encePairwiseOnDemand]: 473/478 looper letters, 323 selfloop transitions, 31 changer transitions 0/355 dead transitions. [2023-08-30 11:48:57,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 355 transitions, 1776 flow [2023-08-30 11:48:57,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 11:48:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 11:48:57,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2761 transitions. [2023-08-30 11:48:57,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813458856345886 [2023-08-30 11:48:57,119 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2761 transitions. [2023-08-30 11:48:57,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2761 transitions. [2023-08-30 11:48:57,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:57,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2761 transitions. [2023-08-30 11:48:57,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 230.08333333333334) internal successors, (2761), 12 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:57,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 478.0) internal successors, (6214), 13 states have internal predecessors, (6214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:57,136 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 478.0) internal successors, (6214), 13 states have internal predecessors, (6214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:57,136 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 186 flow. Second operand 12 states and 2761 transitions. [2023-08-30 11:48:57,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 355 transitions, 1776 flow [2023-08-30 11:48:57,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 355 transitions, 1775 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:48:57,142 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 395 flow [2023-08-30 11:48:57,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=395, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2023-08-30 11:48:57,142 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 17 predicate places. [2023-08-30 11:48:57,143 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 395 flow [2023-08-30 11:48:57,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 202.15384615384616) internal successors, (2628), 13 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:57,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:57,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:48:57,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 11:48:57,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:48:57,349 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:48:57,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:57,349 INFO L85 PathProgramCache]: Analyzing trace with hash -73812637, now seen corresponding path program 1 times [2023-08-30 11:48:57,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:57,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095411091] [2023-08-30 11:48:57,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:57,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:48:57,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:57,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095411091] [2023-08-30 11:48:57,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095411091] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:48:57,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454959431] [2023-08-30 11:48:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:57,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:48:57,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:48:57,400 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) [2023-08-30 11:48:57,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 11:48:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:57,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:48:57,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:48:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:48:57,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:48:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:48:57,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454959431] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:48:57,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:48:57,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 11:48:57,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161590474] [2023-08-30 11:48:57,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:48:57,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:48:57,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:57,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:48:57,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:48:57,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 478 [2023-08-30 11:48:57,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 395 flow. Second operand has 7 states, 7 states have (on average 206.85714285714286) internal successors, (1448), 7 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:57,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:57,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 478 [2023-08-30 11:48:57,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:02,754 INFO L130 PetriNetUnfolder]: 48456/68753 cut-off events. [2023-08-30 11:49:02,754 INFO L131 PetriNetUnfolder]: For 5277/5277 co-relation queries the response was YES. [2023-08-30 11:49:02,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161662 conditions, 68753 events. 48456/68753 cut-off events. For 5277/5277 co-relation queries the response was YES. Maximal size of possible extension queue 1922. Compared 462602 event pairs, 10164 based on Foata normal form. 0/40723 useless extension candidates. Maximal degree in co-relation 161639. Up to 18704 conditions per place. [2023-08-30 11:49:03,082 INFO L137 encePairwiseOnDemand]: 474/478 looper letters, 172 selfloop transitions, 9 changer transitions 0/181 dead transitions. [2023-08-30 11:49:03,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 181 transitions, 1042 flow [2023-08-30 11:49:03,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:49:03,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:49:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1589 transitions. [2023-08-30 11:49:03,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47489539748953974 [2023-08-30 11:49:03,086 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1589 transitions. [2023-08-30 11:49:03,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1589 transitions. [2023-08-30 11:49:03,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:03,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1589 transitions. [2023-08-30 11:49:03,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 227.0) internal successors, (1589), 7 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:03,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:03,097 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:03,097 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 395 flow. Second operand 7 states and 1589 transitions. [2023-08-30 11:49:03,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 181 transitions, 1042 flow [2023-08-30 11:49:03,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 181 transitions, 952 flow, removed 26 selfloop flow, removed 5 redundant places. [2023-08-30 11:49:03,113 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 364 flow [2023-08-30 11:49:03,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=364, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-08-30 11:49:03,114 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 21 predicate places. [2023-08-30 11:49:03,115 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 364 flow [2023-08-30 11:49:03,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 206.85714285714286) internal successors, (1448), 7 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:03,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:03,116 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:03,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 11:49:03,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:03,321 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:49:03,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:03,322 INFO L85 PathProgramCache]: Analyzing trace with hash 2006776608, now seen corresponding path program 1 times [2023-08-30 11:49:03,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:03,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417850254] [2023-08-30 11:49:03,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:03,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:49:03,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:03,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417850254] [2023-08-30 11:49:03,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417850254] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:03,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046234561] [2023-08-30 11:49:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:03,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:03,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:03,479 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) [2023-08-30 11:49:03,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 11:49:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:03,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 11:49:03,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:03,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:49:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:03,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046234561] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:49:03,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:49:03,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2023-08-30 11:49:03,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409956304] [2023-08-30 11:49:03,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:49:03,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 11:49:03,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:03,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 11:49:03,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-30 11:49:03,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 478 [2023-08-30 11:49:03,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 364 flow. Second operand has 12 states, 12 states have (on average 192.58333333333334) internal successors, (2311), 12 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:03,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:03,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 478 [2023-08-30 11:49:03,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:10,272 INFO L130 PetriNetUnfolder]: 52691/76124 cut-off events. [2023-08-30 11:49:10,272 INFO L131 PetriNetUnfolder]: For 103301/108603 co-relation queries the response was YES. [2023-08-30 11:49:10,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197002 conditions, 76124 events. 52691/76124 cut-off events. For 103301/108603 co-relation queries the response was YES. Maximal size of possible extension queue 2309. Compared 524762 event pairs, 36421 based on Foata normal form. 10450/58237 useless extension candidates. Maximal degree in co-relation 196977. Up to 63413 conditions per place. [2023-08-30 11:49:10,698 INFO L137 encePairwiseOnDemand]: 469/478 looper letters, 161 selfloop transitions, 11 changer transitions 3/176 dead transitions. [2023-08-30 11:49:10,698 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 176 transitions, 1084 flow [2023-08-30 11:49:10,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 11:49:10,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 11:49:10,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2037 transitions. [2023-08-30 11:49:10,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261506276150628 [2023-08-30 11:49:10,703 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2037 transitions. [2023-08-30 11:49:10,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2037 transitions. [2023-08-30 11:49:10,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:10,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2037 transitions. [2023-08-30 11:49:10,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 203.7) internal successors, (2037), 10 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:10,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 478.0) internal successors, (5258), 11 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:10,716 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 478.0) internal successors, (5258), 11 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:10,716 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 364 flow. Second operand 10 states and 2037 transitions. [2023-08-30 11:49:10,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 176 transitions, 1084 flow [2023-08-30 11:49:10,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 176 transitions, 1069 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 11:49:10,821 INFO L231 Difference]: Finished difference. Result has 84 places, 77 transitions, 456 flow [2023-08-30 11:49:10,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=456, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2023-08-30 11:49:10,821 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 34 predicate places. [2023-08-30 11:49:10,822 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 456 flow [2023-08-30 11:49:10,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 192.58333333333334) internal successors, (2311), 12 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:10,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:10,823 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:10,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 11:49:11,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:11,029 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:49:11,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:11,029 INFO L85 PathProgramCache]: Analyzing trace with hash -836431156, now seen corresponding path program 2 times [2023-08-30 11:49:11,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:11,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063329172] [2023-08-30 11:49:11,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:11,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:49:11,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:11,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063329172] [2023-08-30 11:49:11,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063329172] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:11,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847264418] [2023-08-30 11:49:11,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:49:11,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:11,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:11,092 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) [2023-08-30 11:49:11,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 11:49:11,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:49:11,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:49:11,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:49:11,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:49:11,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:49:11,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847264418] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:49:11,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:49:11,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-30 11:49:11,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032990760] [2023-08-30 11:49:11,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:11,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:49:11,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:11,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:49:11,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 11:49:11,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 478 [2023-08-30 11:49:11,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 456 flow. Second operand has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 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) [2023-08-30 11:49:11,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:11,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 478 [2023-08-30 11:49:11,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:17,999 INFO L130 PetriNetUnfolder]: 53021/78005 cut-off events. [2023-08-30 11:49:17,999 INFO L131 PetriNetUnfolder]: For 40010/40010 co-relation queries the response was YES. [2023-08-30 11:49:18,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208080 conditions, 78005 events. 53021/78005 cut-off events. For 40010/40010 co-relation queries the response was YES. Maximal size of possible extension queue 2201. Compared 571404 event pairs, 3597 based on Foata normal form. 2200/52572 useless extension candidates. Maximal degree in co-relation 208048. Up to 49874 conditions per place. [2023-08-30 11:49:18,423 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 112 selfloop transitions, 3 changer transitions 0/115 dead transitions. [2023-08-30 11:49:18,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 115 transitions, 775 flow [2023-08-30 11:49:18,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:49:18,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:49:18,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 896 transitions. [2023-08-30 11:49:18,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4686192468619247 [2023-08-30 11:49:18,426 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 896 transitions. [2023-08-30 11:49:18,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 896 transitions. [2023-08-30 11:49:18,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:18,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 896 transitions. [2023-08-30 11:49:18,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:18,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 478.0) internal successors, (2390), 5 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:18,431 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 478.0) internal successors, (2390), 5 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:18,431 INFO L175 Difference]: Start difference. First operand has 84 places, 77 transitions, 456 flow. Second operand 4 states and 896 transitions. [2023-08-30 11:49:18,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 115 transitions, 775 flow [2023-08-30 11:49:19,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 115 transitions, 762 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-30 11:49:19,481 INFO L231 Difference]: Finished difference. Result has 84 places, 73 transitions, 428 flow [2023-08-30 11:49:19,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=428, PETRI_PLACES=84, PETRI_TRANSITIONS=73} [2023-08-30 11:49:19,481 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 34 predicate places. [2023-08-30 11:49:19,481 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 73 transitions, 428 flow [2023-08-30 11:49:19,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 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) [2023-08-30 11:49:19,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:19,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:19,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 11:49:19,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:19,683 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:49:19,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:19,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1981082682, now seen corresponding path program 1 times [2023-08-30 11:49:19,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:19,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98574145] [2023-08-30 11:49:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:19,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:49:19,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:19,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98574145] [2023-08-30 11:49:19,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98574145] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:49:19,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:49:19,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 11:49:19,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775975439] [2023-08-30 11:49:19,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:19,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:49:19,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:19,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:49:19,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 11:49:19,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 478 [2023-08-30 11:49:19,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 73 transitions, 428 flow. Second operand has 4 states, 4 states have (on average 199.5) internal successors, (798), 4 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:19,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:19,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 478 [2023-08-30 11:49:19,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:25,374 INFO L130 PetriNetUnfolder]: 43011/63690 cut-off events. [2023-08-30 11:49:25,375 INFO L131 PetriNetUnfolder]: For 98518/103440 co-relation queries the response was YES. [2023-08-30 11:49:25,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172635 conditions, 63690 events. 43011/63690 cut-off events. For 98518/103440 co-relation queries the response was YES. Maximal size of possible extension queue 2073. Compared 456844 event pairs, 36319 based on Foata normal form. 5154/46203 useless extension candidates. Maximal degree in co-relation 172603. Up to 62769 conditions per place. [2023-08-30 11:49:25,783 INFO L137 encePairwiseOnDemand]: 465/478 looper letters, 74 selfloop transitions, 14 changer transitions 6/95 dead transitions. [2023-08-30 11:49:25,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 95 transitions, 730 flow [2023-08-30 11:49:25,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:49:25,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:49:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 846 transitions. [2023-08-30 11:49:25,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4424686192468619 [2023-08-30 11:49:25,786 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 846 transitions. [2023-08-30 11:49:25,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 846 transitions. [2023-08-30 11:49:25,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:25,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 846 transitions. [2023-08-30 11:49:25,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 211.5) internal successors, (846), 4 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:25,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 478.0) internal successors, (2390), 5 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:25,791 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 478.0) internal successors, (2390), 5 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:25,791 INFO L175 Difference]: Start difference. First operand has 84 places, 73 transitions, 428 flow. Second operand 4 states and 846 transitions. [2023-08-30 11:49:25,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 95 transitions, 730 flow [2023-08-30 11:49:25,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 95 transitions, 724 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 11:49:25,837 INFO L231 Difference]: Finished difference. Result has 87 places, 74 transitions, 491 flow [2023-08-30 11:49:25,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=491, PETRI_PLACES=87, PETRI_TRANSITIONS=74} [2023-08-30 11:49:25,838 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 37 predicate places. [2023-08-30 11:49:25,838 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 74 transitions, 491 flow [2023-08-30 11:49:25,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 199.5) internal successors, (798), 4 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:25,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:25,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:25,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 11:49:25,839 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:49:25,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:25,839 INFO L85 PathProgramCache]: Analyzing trace with hash -593899677, now seen corresponding path program 1 times [2023-08-30 11:49:25,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:25,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532782064] [2023-08-30 11:49:25,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:25,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 11:49:25,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:25,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532782064] [2023-08-30 11:49:25,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532782064] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:49:25,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:49:25,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:49:25,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480327091] [2023-08-30 11:49:25,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:25,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:49:25,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:25,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:49:25,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:49:25,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 478 [2023-08-30 11:49:25,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 74 transitions, 491 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:25,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:25,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 478 [2023-08-30 11:49:25,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:30,978 INFO L130 PetriNetUnfolder]: 39107/58234 cut-off events. [2023-08-30 11:49:30,978 INFO L131 PetriNetUnfolder]: For 61573/63391 co-relation queries the response was YES. [2023-08-30 11:49:31,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180103 conditions, 58234 events. 39107/58234 cut-off events. For 61573/63391 co-relation queries the response was YES. Maximal size of possible extension queue 1862. Compared 412522 event pairs, 9983 based on Foata normal form. 2110/39704 useless extension candidates. Maximal degree in co-relation 180069. Up to 56337 conditions per place. [2023-08-30 11:49:31,377 INFO L137 encePairwiseOnDemand]: 474/478 looper letters, 80 selfloop transitions, 5 changer transitions 0/86 dead transitions. [2023-08-30 11:49:31,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 700 flow [2023-08-30 11:49:31,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:49:31,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:49:31,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 650 transitions. [2023-08-30 11:49:31,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45327754532775455 [2023-08-30 11:49:31,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 650 transitions. [2023-08-30 11:49:31,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 650 transitions. [2023-08-30 11:49:31,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:31,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 650 transitions. [2023-08-30 11:49:31,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:31,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:31,383 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:31,383 INFO L175 Difference]: Start difference. First operand has 87 places, 74 transitions, 491 flow. Second operand 3 states and 650 transitions. [2023-08-30 11:49:31,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 700 flow [2023-08-30 11:49:31,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 86 transitions, 669 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 11:49:31,570 INFO L231 Difference]: Finished difference. Result has 88 places, 74 transitions, 481 flow [2023-08-30 11:49:31,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=481, PETRI_PLACES=88, PETRI_TRANSITIONS=74} [2023-08-30 11:49:31,570 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 38 predicate places. [2023-08-30 11:49:31,571 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 74 transitions, 481 flow [2023-08-30 11:49:31,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:31,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:31,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:31,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 11:49:31,571 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:49:31,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:31,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1857744549, now seen corresponding path program 1 times [2023-08-30 11:49:31,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:31,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015659756] [2023-08-30 11:49:31,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:31,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:49:31,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:31,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015659756] [2023-08-30 11:49:31,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015659756] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:49:31,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:49:31,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:49:31,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609526469] [2023-08-30 11:49:31,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:31,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:49:31,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:31,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:49:31,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:49:31,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 478 [2023-08-30 11:49:31,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 74 transitions, 481 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:31,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:31,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 478 [2023-08-30 11:49:31,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:37,192 INFO L130 PetriNetUnfolder]: 42127/62214 cut-off events. [2023-08-30 11:49:37,193 INFO L131 PetriNetUnfolder]: For 95079/95937 co-relation queries the response was YES. [2023-08-30 11:49:37,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202196 conditions, 62214 events. 42127/62214 cut-off events. For 95079/95937 co-relation queries the response was YES. Maximal size of possible extension queue 1914. Compared 431809 event pairs, 10035 based on Foata normal form. 2418/42072 useless extension candidates. Maximal degree in co-relation 202161. Up to 50281 conditions per place. [2023-08-30 11:49:37,618 INFO L137 encePairwiseOnDemand]: 468/478 looper letters, 86 selfloop transitions, 5 changer transitions 0/92 dead transitions. [2023-08-30 11:49:37,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 92 transitions, 751 flow [2023-08-30 11:49:37,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:49:37,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:49:37,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 655 transitions. [2023-08-30 11:49:37,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45676429567642957 [2023-08-30 11:49:37,620 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 655 transitions. [2023-08-30 11:49:37,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 655 transitions. [2023-08-30 11:49:37,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:37,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 655 transitions. [2023-08-30 11:49:37,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:37,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:37,623 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:37,624 INFO L175 Difference]: Start difference. First operand has 88 places, 74 transitions, 481 flow. Second operand 3 states and 655 transitions. [2023-08-30 11:49:37,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 92 transitions, 751 flow [2023-08-30 11:49:37,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 92 transitions, 726 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-08-30 11:49:37,674 INFO L231 Difference]: Finished difference. Result has 90 places, 78 transitions, 513 flow [2023-08-30 11:49:37,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=513, PETRI_PLACES=90, PETRI_TRANSITIONS=78} [2023-08-30 11:49:37,675 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 40 predicate places. [2023-08-30 11:49:37,675 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 78 transitions, 513 flow [2023-08-30 11:49:37,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:37,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:37,675 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:37,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 11:49:37,676 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:49:37,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:37,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1280765367, now seen corresponding path program 2 times [2023-08-30 11:49:37,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:37,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227496766] [2023-08-30 11:49:37,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:37,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:49:37,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:37,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227496766] [2023-08-30 11:49:37,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227496766] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:37,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625570575] [2023-08-30 11:49:37,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:49:37,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:37,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:37,785 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) [2023-08-30 11:49:37,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 11:49:37,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:49:37,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:49:37,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:49:37,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-30 11:49:37,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:49:37,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625570575] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:49:37,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:49:37,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-08-30 11:49:37,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416748290] [2023-08-30 11:49:37,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:37,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:49:37,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:37,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:49:37,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:49:37,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 478 [2023-08-30 11:49:37,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 78 transitions, 513 flow. Second operand has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:37,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:37,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 478 [2023-08-30 11:49:37,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:43,312 INFO L130 PetriNetUnfolder]: 39375/58342 cut-off events. [2023-08-30 11:49:43,312 INFO L131 PetriNetUnfolder]: For 56064/56922 co-relation queries the response was YES. [2023-08-30 11:49:43,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198195 conditions, 58342 events. 39375/58342 cut-off events. For 56064/56922 co-relation queries the response was YES. Maximal size of possible extension queue 1799. Compared 404113 event pairs, 27043 based on Foata normal form. 1978/42200 useless extension candidates. Maximal degree in co-relation 198158. Up to 58309 conditions per place. [2023-08-30 11:49:43,696 INFO L137 encePairwiseOnDemand]: 476/478 looper letters, 74 selfloop transitions, 1 changer transitions 1/77 dead transitions. [2023-08-30 11:49:43,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 77 transitions, 655 flow [2023-08-30 11:49:43,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:49:43,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:49:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 647 transitions. [2023-08-30 11:49:43,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511854951185495 [2023-08-30 11:49:43,697 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 647 transitions. [2023-08-30 11:49:43,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 647 transitions. [2023-08-30 11:49:43,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:43,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 647 transitions. [2023-08-30 11:49:43,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:43,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:43,701 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:43,701 INFO L175 Difference]: Start difference. First operand has 90 places, 78 transitions, 513 flow. Second operand 3 states and 647 transitions. [2023-08-30 11:49:43,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 77 transitions, 655 flow [2023-08-30 11:49:43,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 77 transitions, 638 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-30 11:49:43,756 INFO L231 Difference]: Finished difference. Result has 86 places, 76 transitions, 482 flow [2023-08-30 11:49:43,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=482, PETRI_PLACES=86, PETRI_TRANSITIONS=76} [2023-08-30 11:49:43,756 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 36 predicate places. [2023-08-30 11:49:43,757 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 76 transitions, 482 flow [2023-08-30 11:49:43,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:43,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:43,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:43,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 11:49:43,957 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,SelfDestructingSolverStorable14 [2023-08-30 11:49:43,958 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:49:43,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:43,958 INFO L85 PathProgramCache]: Analyzing trace with hash -423660763, now seen corresponding path program 1 times [2023-08-30 11:49:43,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:43,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536541947] [2023-08-30 11:49:43,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:43,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:49:44,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:44,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536541947] [2023-08-30 11:49:44,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536541947] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:44,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363156145] [2023-08-30 11:49:44,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:44,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:44,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:44,117 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) [2023-08-30 11:49:44,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 11:49:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:44,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:49:44,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 11:49:44,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:49:44,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363156145] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:49:44,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:49:44,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-08-30 11:49:44,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658581723] [2023-08-30 11:49:44,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:44,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:49:44,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:44,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:49:44,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 11:49:44,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 478 [2023-08-30 11:49:44,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 76 transitions, 482 flow. Second operand has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:44,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:44,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 478 [2023-08-30 11:49:44,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:47,822 INFO L130 PetriNetUnfolder]: 28892/42539 cut-off events. [2023-08-30 11:49:47,822 INFO L131 PetriNetUnfolder]: For 26743/27103 co-relation queries the response was YES. [2023-08-30 11:49:47,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139923 conditions, 42539 events. 28892/42539 cut-off events. For 26743/27103 co-relation queries the response was YES. Maximal size of possible extension queue 1292. Compared 278617 event pairs, 18580 based on Foata normal form. 3180/31759 useless extension candidates. Maximal degree in co-relation 139889. Up to 42509 conditions per place. [2023-08-30 11:49:48,099 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 72 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-08-30 11:49:48,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 74 transitions, 618 flow [2023-08-30 11:49:48,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:49:48,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:49:48,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 646 transitions. [2023-08-30 11:49:48,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4504881450488145 [2023-08-30 11:49:48,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 646 transitions. [2023-08-30 11:49:48,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 646 transitions. [2023-08-30 11:49:48,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:48,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 646 transitions. [2023-08-30 11:49:48,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:48,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:48,103 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:48,103 INFO L175 Difference]: Start difference. First operand has 86 places, 76 transitions, 482 flow. Second operand 3 states and 646 transitions. [2023-08-30 11:49:48,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 74 transitions, 618 flow [2023-08-30 11:49:48,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 74 transitions, 593 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-30 11:49:48,153 INFO L231 Difference]: Finished difference. Result has 83 places, 74 transitions, 449 flow [2023-08-30 11:49:48,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=449, PETRI_PLACES=83, PETRI_TRANSITIONS=74} [2023-08-30 11:49:48,154 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 33 predicate places. [2023-08-30 11:49:48,154 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 74 transitions, 449 flow [2023-08-30 11:49:48,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:48,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:48,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:48,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 11:49:48,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 11:49:48,359 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:49:48,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:48,359 INFO L85 PathProgramCache]: Analyzing trace with hash -423660575, now seen corresponding path program 1 times [2023-08-30 11:49:48,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:48,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815128804] [2023-08-30 11:49:48,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:48,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:49:49,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:49,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815128804] [2023-08-30 11:49:49,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815128804] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:49,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616430039] [2023-08-30 11:49:49,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:49,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:49,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:49,110 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) [2023-08-30 11:49:49,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 11:49:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:49,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 11:49:49,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:49,296 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 [2023-08-30 11:49:49,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:49:49,360 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 [2023-08-30 11:49:49,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:49:49,429 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 [2023-08-30 11:49:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:49:49,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:49:49,591 WARN L839 $PredicateComparison]: unable to prove that (forall ((~q2_back~0 Int) (v_ArrVal_584 (Array Int Int))) (or (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_584) c_~q2~0.base) (+ c_~q2~0.offset (* ~q2_back~0 4))) 2147483648) (< ~q2_back~0 0) (<= c_~n2~0 ~q2_back~0))) is different from false [2023-08-30 11:49:49,677 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:49:49,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 11:49:49,687 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:49:49,688 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 79 treesize of output 71 [2023-08-30 11:49:49,693 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 60 treesize of output 48 [2023-08-30 11:49:49,700 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 26 treesize of output 20 [2023-08-30 11:49:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:49:49,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616430039] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:49:49,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:49:49,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2023-08-30 11:49:49,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843255113] [2023-08-30 11:49:49,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:49:49,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 11:49:49,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:49,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 11:49:49,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=331, Unknown=1, NotChecked=36, Total=420 [2023-08-30 11:49:50,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 478 [2023-08-30 11:49:50,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 74 transitions, 449 flow. Second operand has 21 states, 21 states have (on average 141.71428571428572) internal successors, (2976), 21 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:50,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:50,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 478 [2023-08-30 11:49:50,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:57,311 INFO L130 PetriNetUnfolder]: 29192/43159 cut-off events. [2023-08-30 11:49:57,312 INFO L131 PetriNetUnfolder]: For 21575/21963 co-relation queries the response was YES. [2023-08-30 11:49:57,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122953 conditions, 43159 events. 29192/43159 cut-off events. For 21575/21963 co-relation queries the response was YES. Maximal size of possible extension queue 1263. Compared 284114 event pairs, 16192 based on Foata normal form. 388/29609 useless extension candidates. Maximal degree in co-relation 122919. Up to 41675 conditions per place. [2023-08-30 11:49:57,565 INFO L137 encePairwiseOnDemand]: 462/478 looper letters, 147 selfloop transitions, 86 changer transitions 0/234 dead transitions. [2023-08-30 11:49:57,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 234 transitions, 1608 flow [2023-08-30 11:49:57,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 11:49:57,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 11:49:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5076 transitions. [2023-08-30 11:49:57,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30340705319784816 [2023-08-30 11:49:57,574 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5076 transitions. [2023-08-30 11:49:57,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5076 transitions. [2023-08-30 11:49:57,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:57,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5076 transitions. [2023-08-30 11:49:57,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 145.02857142857144) internal successors, (5076), 35 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:57,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 478.0) internal successors, (17208), 36 states have internal predecessors, (17208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:57,602 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 478.0) internal successors, (17208), 36 states have internal predecessors, (17208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:57,602 INFO L175 Difference]: Start difference. First operand has 83 places, 74 transitions, 449 flow. Second operand 35 states and 5076 transitions. [2023-08-30 11:49:57,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 234 transitions, 1608 flow [2023-08-30 11:49:57,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 234 transitions, 1607 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:49:57,613 INFO L231 Difference]: Finished difference. Result has 133 places, 141 transitions, 1034 flow [2023-08-30 11:49:57,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1034, PETRI_PLACES=133, PETRI_TRANSITIONS=141} [2023-08-30 11:49:57,614 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 83 predicate places. [2023-08-30 11:49:57,614 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 141 transitions, 1034 flow [2023-08-30 11:49:57,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 141.71428571428572) internal successors, (2976), 21 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:57,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:57,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:57,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 11:49:57,820 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,SelfDestructingSolverStorable16 [2023-08-30 11:49:57,821 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:49:57,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:57,821 INFO L85 PathProgramCache]: Analyzing trace with hash -567670413, now seen corresponding path program 1 times [2023-08-30 11:49:57,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:57,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368309932] [2023-08-30 11:49:57,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:57,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:58,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:58,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:58,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368309932] [2023-08-30 11:49:58,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368309932] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:58,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360095431] [2023-08-30 11:49:58,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:58,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:58,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:58,567 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) [2023-08-30 11:49:58,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 11:49:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:58,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 11:49:58,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:58,758 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 [2023-08-30 11:49:58,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:49:58,808 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 [2023-08-30 11:49:58,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:49:58,858 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 [2023-08-30 11:49:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:49:58,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:50:01,193 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:01,194 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 31 treesize of output 32 [2023-08-30 11:50:01,204 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:01,204 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 89 treesize of output 81 [2023-08-30 11:50:01,215 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 36 treesize of output 30 [2023-08-30 11:50:01,221 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 62 treesize of output 50 [2023-08-30 11:50:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:50:01,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360095431] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:50:01,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:50:01,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 21 [2023-08-30 11:50:01,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784800942] [2023-08-30 11:50:01,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:50:01,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 11:50:01,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:01,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 11:50:01,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=439, Unknown=4, NotChecked=0, Total=506 [2023-08-30 11:50:03,464 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] [2023-08-30 11:50:05,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:50:08,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:50:10,549 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] [2023-08-30 11:50:10,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 478 [2023-08-30 11:50:10,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 141 transitions, 1034 flow. Second operand has 23 states, 23 states have (on average 137.56521739130434) internal successors, (3164), 23 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:10,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:10,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 478 [2023-08-30 11:50:10,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:21,886 INFO L130 PetriNetUnfolder]: 29926/44581 cut-off events. [2023-08-30 11:50:21,886 INFO L131 PetriNetUnfolder]: For 138551/138941 co-relation queries the response was YES. [2023-08-30 11:50:22,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170135 conditions, 44581 events. 29926/44581 cut-off events. For 138551/138941 co-relation queries the response was YES. Maximal size of possible extension queue 1279. Compared 300384 event pairs, 17462 based on Foata normal form. 390/34480 useless extension candidates. Maximal degree in co-relation 170083. Up to 42475 conditions per place. [2023-08-30 11:50:22,412 INFO L137 encePairwiseOnDemand]: 462/478 looper letters, 167 selfloop transitions, 122 changer transitions 11/301 dead transitions. [2023-08-30 11:50:22,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 301 transitions, 2706 flow [2023-08-30 11:50:22,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 11:50:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 11:50:22,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4799 transitions. [2023-08-30 11:50:22,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2952867339404381 [2023-08-30 11:50:22,418 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4799 transitions. [2023-08-30 11:50:22,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4799 transitions. [2023-08-30 11:50:22,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:22,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4799 transitions. [2023-08-30 11:50:22,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 141.14705882352942) internal successors, (4799), 34 states have internal predecessors, (4799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:22,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 478.0) internal successors, (16730), 35 states have internal predecessors, (16730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:22,434 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 478.0) internal successors, (16730), 35 states have internal predecessors, (16730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:22,434 INFO L175 Difference]: Start difference. First operand has 133 places, 141 transitions, 1034 flow. Second operand 34 states and 4799 transitions. [2023-08-30 11:50:22,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 301 transitions, 2706 flow [2023-08-30 11:50:24,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 301 transitions, 2611 flow, removed 24 selfloop flow, removed 7 redundant places. [2023-08-30 11:50:24,426 INFO L231 Difference]: Finished difference. Result has 174 places, 190 transitions, 1704 flow [2023-08-30 11:50:24,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=951, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1704, PETRI_PLACES=174, PETRI_TRANSITIONS=190} [2023-08-30 11:50:24,427 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 124 predicate places. [2023-08-30 11:50:24,427 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 190 transitions, 1704 flow [2023-08-30 11:50:24,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 137.56521739130434) internal successors, (3164), 23 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:24,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:24,428 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-30 11:50:24,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 11:50:24,633 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,SelfDestructingSolverStorable17 [2023-08-30 11:50:24,634 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:50:24,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:24,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1998585994, now seen corresponding path program 2 times [2023-08-30 11:50:24,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:24,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001793418] [2023-08-30 11:50:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:24,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:24,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:24,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001793418] [2023-08-30 11:50:24,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001793418] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:24,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154941402] [2023-08-30 11:50:24,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:50:24,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:24,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:24,815 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) [2023-08-30 11:50:24,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 11:50:24,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:50:24,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:50:24,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 11:50:24,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 11:50:24,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:50:24,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154941402] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:50:24,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:50:24,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2023-08-30 11:50:24,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716462595] [2023-08-30 11:50:24,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:50:24,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:50:24,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:24,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:50:24,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2023-08-30 11:50:24,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 478 [2023-08-30 11:50:24,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 190 transitions, 1704 flow. Second operand has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:24,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:24,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 478 [2023-08-30 11:50:24,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:30,501 INFO L130 PetriNetUnfolder]: 29856/44396 cut-off events. [2023-08-30 11:50:30,501 INFO L131 PetriNetUnfolder]: For 372004/372288 co-relation queries the response was YES. [2023-08-30 11:50:30,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199661 conditions, 44396 events. 29856/44396 cut-off events. For 372004/372288 co-relation queries the response was YES. Maximal size of possible extension queue 1347. Compared 298998 event pairs, 18633 based on Foata normal form. 287/38923 useless extension candidates. Maximal degree in co-relation 199596. Up to 44368 conditions per place. [2023-08-30 11:50:31,125 INFO L137 encePairwiseOnDemand]: 476/478 looper letters, 181 selfloop transitions, 1 changer transitions 4/187 dead transitions. [2023-08-30 11:50:31,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 187 transitions, 1995 flow [2023-08-30 11:50:31,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:50:31,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:50:31,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 632 transitions. [2023-08-30 11:50:31,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4407252440725244 [2023-08-30 11:50:31,126 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 632 transitions. [2023-08-30 11:50:31,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 632 transitions. [2023-08-30 11:50:31,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:31,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 632 transitions. [2023-08-30 11:50:31,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:31,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:31,128 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:31,128 INFO L175 Difference]: Start difference. First operand has 174 places, 190 transitions, 1704 flow. Second operand 3 states and 632 transitions. [2023-08-30 11:50:31,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 187 transitions, 1995 flow [2023-08-30 11:50:35,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 187 transitions, 1778 flow, removed 44 selfloop flow, removed 24 redundant places. [2023-08-30 11:50:35,938 INFO L231 Difference]: Finished difference. Result has 150 places, 183 transitions, 1389 flow [2023-08-30 11:50:35,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1389, PETRI_PLACES=150, PETRI_TRANSITIONS=183} [2023-08-30 11:50:35,939 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 100 predicate places. [2023-08-30 11:50:35,939 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 183 transitions, 1389 flow [2023-08-30 11:50:35,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:35,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:35,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:35,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 11:50:36,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:36,140 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:50:36,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:36,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1354308895, now seen corresponding path program 1 times [2023-08-30 11:50:36,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:36,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618700266] [2023-08-30 11:50:36,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:36,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:50:36,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:36,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618700266] [2023-08-30 11:50:36,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618700266] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:36,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934366940] [2023-08-30 11:50:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:36,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:36,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:36,636 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) [2023-08-30 11:50:36,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 11:50:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:36,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 11:50:36,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:36,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:50:36,969 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 [2023-08-30 11:50:37,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:50:37,013 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 [2023-08-30 11:50:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:50:37,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:50:37,210 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:37,211 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 80 treesize of output 72 [2023-08-30 11:50:37,217 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 60 treesize of output 48 [2023-08-30 11:50:37,223 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 26 treesize of output 20 [2023-08-30 11:50:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:50:37,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934366940] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:50:37,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:50:37,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-30 11:50:37,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137120] [2023-08-30 11:50:37,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:50:37,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 11:50:37,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:37,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 11:50:37,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=504, Unknown=6, NotChecked=0, Total=600 [2023-08-30 11:50:39,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:50:40,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 478 [2023-08-30 11:50:40,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 183 transitions, 1389 flow. Second operand has 25 states, 25 states have (on average 148.56) internal successors, (3714), 25 states have internal predecessors, (3714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:40,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:40,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 478 [2023-08-30 11:50:40,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:50,868 INFO L130 PetriNetUnfolder]: 44460/66755 cut-off events. [2023-08-30 11:50:50,868 INFO L131 PetriNetUnfolder]: For 762457/762847 co-relation queries the response was YES. [2023-08-30 11:50:51,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326416 conditions, 66755 events. 44460/66755 cut-off events. For 762457/762847 co-relation queries the response was YES. Maximal size of possible extension queue 2132. Compared 492079 event pairs, 5048 based on Foata normal form. 1637/62272 useless extension candidates. Maximal degree in co-relation 326364. Up to 25181 conditions per place. [2023-08-30 11:50:51,639 INFO L137 encePairwiseOnDemand]: 465/478 looper letters, 337 selfloop transitions, 121 changer transitions 1/460 dead transitions. [2023-08-30 11:50:51,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 460 transitions, 4029 flow [2023-08-30 11:50:51,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 11:50:51,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 11:50:51,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3611 transitions. [2023-08-30 11:50:51,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3284518828451883 [2023-08-30 11:50:51,643 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3611 transitions. [2023-08-30 11:50:51,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3611 transitions. [2023-08-30 11:50:51,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:51,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3611 transitions. [2023-08-30 11:50:51,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 157.0) internal successors, (3611), 23 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:51,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 478.0) internal successors, (11472), 24 states have internal predecessors, (11472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:51,654 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 478.0) internal successors, (11472), 24 states have internal predecessors, (11472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:51,655 INFO L175 Difference]: Start difference. First operand has 150 places, 183 transitions, 1389 flow. Second operand 23 states and 3611 transitions. [2023-08-30 11:50:51,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 460 transitions, 4029 flow [2023-08-30 11:51:02,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 460 transitions, 3896 flow, removed 54 selfloop flow, removed 5 redundant places. [2023-08-30 11:51:02,787 INFO L231 Difference]: Finished difference. Result has 173 places, 239 transitions, 2416 flow [2023-08-30 11:51:02,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=1303, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2416, PETRI_PLACES=173, PETRI_TRANSITIONS=239} [2023-08-30 11:51:02,787 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 123 predicate places. [2023-08-30 11:51:02,787 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 239 transitions, 2416 flow [2023-08-30 11:51:02,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 148.56) internal successors, (3714), 25 states have internal predecessors, (3714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:02,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:51:02,788 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:51:02,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-30 11:51:02,994 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,SelfDestructingSolverStorable19 [2023-08-30 11:51:02,994 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:51:02,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:51:02,995 INFO L85 PathProgramCache]: Analyzing trace with hash 632055745, now seen corresponding path program 1 times [2023-08-30 11:51:02,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:51:02,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596572473] [2023-08-30 11:51:02,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:51:02,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:51:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:51:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:51:03,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:51:03,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596572473] [2023-08-30 11:51:03,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596572473] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:51:03,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006026476] [2023-08-30 11:51:03,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:51:03,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:51:03,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:51:03,541 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) [2023-08-30 11:51:03,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 11:51:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:51:03,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 11:51:03,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:51:03,746 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 [2023-08-30 11:51:03,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:51:03,805 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 [2023-08-30 11:51:03,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:51:03,865 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 [2023-08-30 11:51:03,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:51:03,919 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 [2023-08-30 11:51:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:51:04,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:51:04,111 WARN L839 $PredicateComparison]: unable to prove that (forall ((~q2_back~0 Int) (v_ArrVal_827 (Array Int Int))) (or (< ~q2_back~0 0) (<= c_~n2~0 ~q2_back~0) (< 0 (+ 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_827) c_~q2~0.base) (+ c_~q2~0.offset (* ~q2_back~0 4))))))) is different from false [2023-08-30 11:51:04,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:51:04,252 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 34 treesize of output 35 [2023-08-30 11:51:04,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:51:04,263 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 683 treesize of output 651 [2023-08-30 11:51:04,288 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 73 treesize of output 61 [2023-08-30 11:51:04,297 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 61 treesize of output 55 [2023-08-30 11:51:04,305 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 78 treesize of output 54 [2023-08-30 11:51:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:51:04,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006026476] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:51:04,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:51:04,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2023-08-30 11:51:04,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312460378] [2023-08-30 11:51:04,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:51:04,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 11:51:04,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:51:04,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 11:51:04,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=396, Unknown=5, NotChecked=40, Total=506 [2023-08-30 11:51:04,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 478 [2023-08-30 11:51:04,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 239 transitions, 2416 flow. Second operand has 23 states, 23 states have (on average 146.6086956521739) internal successors, (3372), 23 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:04,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:51:04,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 478 [2023-08-30 11:51:04,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:51:14,935 INFO L130 PetriNetUnfolder]: 47599/71716 cut-off events. [2023-08-30 11:51:14,935 INFO L131 PetriNetUnfolder]: For 736505/736915 co-relation queries the response was YES. [2023-08-30 11:51:15,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363022 conditions, 71716 events. 47599/71716 cut-off events. For 736505/736915 co-relation queries the response was YES. Maximal size of possible extension queue 2241. Compared 532320 event pairs, 25724 based on Foata normal form. 905/65763 useless extension candidates. Maximal degree in co-relation 362960. Up to 59056 conditions per place. [2023-08-30 11:51:15,897 INFO L137 encePairwiseOnDemand]: 465/478 looper letters, 305 selfloop transitions, 131 changer transitions 0/437 dead transitions. [2023-08-30 11:51:15,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 437 transitions, 5158 flow [2023-08-30 11:51:15,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 11:51:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 11:51:15,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2015 transitions. [2023-08-30 11:51:15,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32426778242677823 [2023-08-30 11:51:15,899 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2015 transitions. [2023-08-30 11:51:15,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2015 transitions. [2023-08-30 11:51:15,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:51:15,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2015 transitions. [2023-08-30 11:51:15,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 155.0) internal successors, (2015), 13 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:15,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 478.0) internal successors, (6692), 14 states have internal predecessors, (6692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:15,904 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 478.0) internal successors, (6692), 14 states have internal predecessors, (6692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:15,904 INFO L175 Difference]: Start difference. First operand has 173 places, 239 transitions, 2416 flow. Second operand 13 states and 2015 transitions. [2023-08-30 11:51:15,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 437 transitions, 5158 flow [2023-08-30 11:52:05,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 437 transitions, 4511 flow, removed 303 selfloop flow, removed 7 redundant places. [2023-08-30 11:52:05,601 INFO L231 Difference]: Finished difference. Result has 183 places, 282 transitions, 3031 flow [2023-08-30 11:52:05,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=2132, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3031, PETRI_PLACES=183, PETRI_TRANSITIONS=282} [2023-08-30 11:52:05,602 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 133 predicate places. [2023-08-30 11:52:05,602 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 282 transitions, 3031 flow [2023-08-30 11:52:05,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 146.6086956521739) internal successors, (3372), 23 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:05,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:52:05,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:52:05,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 11:52:05,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:52:05,809 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:52:05,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:52:05,809 INFO L85 PathProgramCache]: Analyzing trace with hash -248487371, now seen corresponding path program 1 times [2023-08-30 11:52:05,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:52:05,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862552705] [2023-08-30 11:52:05,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:52:05,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:52:05,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:52:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:52:06,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:52:06,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862552705] [2023-08-30 11:52:06,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862552705] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:52:06,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027447188] [2023-08-30 11:52:06,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:52:06,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:52:06,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:52:06,505 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) [2023-08-30 11:52:06,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 11:52:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:52:06,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 11:52:06,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:52:06,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:52:06,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:52:06,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:52:06,666 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 11:52:06,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 11:52:06,749 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 [2023-08-30 11:52:06,798 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 11:52:06,798 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 11 treesize of output 11 [2023-08-30 11:52:06,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-08-30 11:52:06,870 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 [2023-08-30 11:52:06,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:52:06,951 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 [2023-08-30 11:52:07,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:52:07,032 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 [2023-08-30 11:52:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:52:07,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:52:07,139 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_889 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_889) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)) is different from false [2023-08-30 11:52:07,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:52:07,535 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 66 treesize of output 54 [2023-08-30 11:52:07,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:52:07,560 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 5040 treesize of output 4904 [2023-08-30 11:52:07,619 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 141 treesize of output 117 [2023-08-30 11:52:07,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:52:07,637 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 182 treesize of output 178 [2023-08-30 11:52:07,659 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:52:07,661 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 170 treesize of output 154 [2023-08-30 11:52:07,675 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 146 treesize of output 98 [2023-08-30 11:52:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:52:08,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027447188] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:52:08,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:52:08,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-30 11:52:08,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686620618] [2023-08-30 11:52:08,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:52:08,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 11:52:08,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:52:08,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 11:52:08,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=810, Unknown=9, NotChecked=58, Total=992 [2023-08-30 11:52:08,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 478 [2023-08-30 11:52:08,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 282 transitions, 3031 flow. Second operand has 32 states, 32 states have (on average 142.21875) internal successors, (4551), 32 states have internal predecessors, (4551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:08,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:52:08,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 478 [2023-08-30 11:52:08,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:52:20,512 INFO L130 PetriNetUnfolder]: 48513/73453 cut-off events. [2023-08-30 11:52:20,512 INFO L131 PetriNetUnfolder]: For 479622/480018 co-relation queries the response was YES. [2023-08-30 11:52:21,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337774 conditions, 73453 events. 48513/73453 cut-off events. For 479622/480018 co-relation queries the response was YES. Maximal size of possible extension queue 2334. Compared 554493 event pairs, 20699 based on Foata normal form. 446/66675 useless extension candidates. Maximal degree in co-relation 337710. Up to 44664 conditions per place. [2023-08-30 11:52:21,724 INFO L137 encePairwiseOnDemand]: 463/478 looper letters, 346 selfloop transitions, 107 changer transitions 0/454 dead transitions. [2023-08-30 11:52:21,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 454 transitions, 5111 flow [2023-08-30 11:52:21,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 11:52:21,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 11:52:21,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3419 transitions. [2023-08-30 11:52:21,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31098781153356375 [2023-08-30 11:52:21,730 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3419 transitions. [2023-08-30 11:52:21,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3419 transitions. [2023-08-30 11:52:21,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:52:21,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3419 transitions. [2023-08-30 11:52:21,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 148.65217391304347) internal successors, (3419), 23 states have internal predecessors, (3419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:21,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 478.0) internal successors, (11472), 24 states have internal predecessors, (11472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:21,745 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 478.0) internal successors, (11472), 24 states have internal predecessors, (11472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:21,745 INFO L175 Difference]: Start difference. First operand has 183 places, 282 transitions, 3031 flow. Second operand 23 states and 3419 transitions. [2023-08-30 11:52:21,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 454 transitions, 5111 flow [2023-08-30 11:52:36,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 454 transitions, 4975 flow, removed 24 selfloop flow, removed 9 redundant places. [2023-08-30 11:52:36,330 INFO L231 Difference]: Finished difference. Result has 208 places, 307 transitions, 3597 flow [2023-08-30 11:52:36,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=2929, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3597, PETRI_PLACES=208, PETRI_TRANSITIONS=307} [2023-08-30 11:52:36,331 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 158 predicate places. [2023-08-30 11:52:36,331 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 307 transitions, 3597 flow [2023-08-30 11:52:36,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 142.21875) internal successors, (4551), 32 states have internal predecessors, (4551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:36,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:52:36,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:52:36,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 11:52:36,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:52:36,532 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:52:36,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:52:36,533 INFO L85 PathProgramCache]: Analyzing trace with hash 623493125, now seen corresponding path program 2 times [2023-08-30 11:52:36,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:52:36,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198892245] [2023-08-30 11:52:36,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:52:36,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:52:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:52:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:52:37,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:52:37,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198892245] [2023-08-30 11:52:37,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198892245] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:52:37,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727021357] [2023-08-30 11:52:37,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:52:37,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:52:37,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:52:37,497 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) [2023-08-30 11:52:37,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 11:52:37,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:52:37,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:52:37,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 11:52:37,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:52:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 11:52:37,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:52:37,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727021357] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:52:37,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:52:37,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 14 [2023-08-30 11:52:37,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793091772] [2023-08-30 11:52:37,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:52:37,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 11:52:37,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:52:37,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 11:52:37,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-08-30 11:52:37,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 478 [2023-08-30 11:52:37,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 307 transitions, 3597 flow. Second operand has 6 states, 6 states have (on average 192.16666666666666) internal successors, (1153), 6 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:37,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:52:37,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 478 [2023-08-30 11:52:37,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:52:51,312 INFO L130 PetriNetUnfolder]: 60449/91683 cut-off events. [2023-08-30 11:52:51,312 INFO L131 PetriNetUnfolder]: For 721933/722410 co-relation queries the response was YES. [2023-08-30 11:52:52,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449650 conditions, 91683 events. 60449/91683 cut-off events. For 721933/722410 co-relation queries the response was YES. Maximal size of possible extension queue 2982. Compared 714012 event pairs, 15527 based on Foata normal form. 1122/83735 useless extension candidates. Maximal degree in co-relation 449578. Up to 67683 conditions per place. [2023-08-30 11:52:52,519 INFO L137 encePairwiseOnDemand]: 470/478 looper letters, 333 selfloop transitions, 84 changer transitions 0/418 dead transitions. [2023-08-30 11:52:52,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 418 transitions, 5683 flow [2023-08-30 11:52:52,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:52:52,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:52:52,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1017 transitions. [2023-08-30 11:52:52,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42552301255230124 [2023-08-30 11:52:52,521 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1017 transitions. [2023-08-30 11:52:52,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1017 transitions. [2023-08-30 11:52:52,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:52:52,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1017 transitions. [2023-08-30 11:52:52,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 203.4) internal successors, (1017), 5 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:52,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:52,525 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:52,525 INFO L175 Difference]: Start difference. First operand has 208 places, 307 transitions, 3597 flow. Second operand 5 states and 1017 transitions. [2023-08-30 11:52:52,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 418 transitions, 5683 flow [2023-08-30 11:53:41,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 418 transitions, 5579 flow, removed 26 selfloop flow, removed 6 redundant places. [2023-08-30 11:53:41,492 INFO L231 Difference]: Finished difference. Result has 208 places, 351 transitions, 4446 flow [2023-08-30 11:53:41,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=3499, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4446, PETRI_PLACES=208, PETRI_TRANSITIONS=351} [2023-08-30 11:53:41,493 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 158 predicate places. [2023-08-30 11:53:41,493 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 351 transitions, 4446 flow [2023-08-30 11:53:41,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 192.16666666666666) internal successors, (1153), 6 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:53:41,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:53:41,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:53:41,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 11:53:41,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-30 11:53:41,694 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:53:41,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:53:41,694 INFO L85 PathProgramCache]: Analyzing trace with hash -445497389, now seen corresponding path program 2 times [2023-08-30 11:53:41,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:53:41,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012007556] [2023-08-30 11:53:41,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:53:41,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:53:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:53:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:53:42,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:53:42,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012007556] [2023-08-30 11:53:42,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012007556] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:53:42,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461246379] [2023-08-30 11:53:42,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:53:42,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:53:42,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:53:42,456 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) [2023-08-30 11:53:42,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 11:53:42,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:53:42,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:53:42,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 11:53:42,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:53:42,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 11:53:42,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:53:42,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461246379] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:53:42,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:53:42,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 14 [2023-08-30 11:53:42,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373756369] [2023-08-30 11:53:42,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:53:42,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 11:53:42,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:53:42,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 11:53:42,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-08-30 11:53:42,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 478 [2023-08-30 11:53:42,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 351 transitions, 4446 flow. Second operand has 6 states, 6 states have (on average 192.16666666666666) internal successors, (1153), 6 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:53:42,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:53:42,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 478 [2023-08-30 11:53:42,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:53:58,147 INFO L130 PetriNetUnfolder]: 64285/98679 cut-off events. [2023-08-30 11:53:58,147 INFO L131 PetriNetUnfolder]: For 750925/751330 co-relation queries the response was YES. [2023-08-30 11:53:59,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488401 conditions, 98679 events. 64285/98679 cut-off events. For 750925/751330 co-relation queries the response was YES. Maximal size of possible extension queue 3322. Compared 792511 event pairs, 29481 based on Foata normal form. 619/89074 useless extension candidates. Maximal degree in co-relation 488326. Up to 90122 conditions per place. [2023-08-30 11:53:59,413 INFO L137 encePairwiseOnDemand]: 471/478 looper letters, 374 selfloop transitions, 66 changer transitions 0/441 dead transitions. [2023-08-30 11:53:59,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 441 transitions, 6350 flow [2023-08-30 11:53:59,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:53:59,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:53:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1014 transitions. [2023-08-30 11:53:59,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42426778242677826 [2023-08-30 11:53:59,414 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1014 transitions. [2023-08-30 11:53:59,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1014 transitions. [2023-08-30 11:53:59,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:53:59,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1014 transitions. [2023-08-30 11:53:59,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 202.8) internal successors, (1014), 5 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:53:59,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:53:59,417 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 478.0) internal successors, (2868), 6 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:53:59,417 INFO L175 Difference]: Start difference. First operand has 208 places, 351 transitions, 4446 flow. Second operand 5 states and 1014 transitions. [2023-08-30 11:53:59,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 441 transitions, 6350 flow [2023-08-30 11:55:11,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 441 transitions, 6244 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-30 11:55:11,466 INFO L231 Difference]: Finished difference. Result has 212 places, 369 transitions, 4774 flow [2023-08-30 11:55:11,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=4342, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4774, PETRI_PLACES=212, PETRI_TRANSITIONS=369} [2023-08-30 11:55:11,467 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 162 predicate places. [2023-08-30 11:55:11,467 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 369 transitions, 4774 flow [2023-08-30 11:55:11,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 192.16666666666666) internal successors, (1153), 6 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:11,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:55:11,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:55:11,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-30 11:55:11,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:55:11,669 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:55:11,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:55:11,670 INFO L85 PathProgramCache]: Analyzing trace with hash -524055295, now seen corresponding path program 3 times [2023-08-30 11:55:11,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:55:11,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282756249] [2023-08-30 11:55:11,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:55:11,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:55:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:55:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:55:12,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:55:12,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282756249] [2023-08-30 11:55:12,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282756249] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:55:12,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325455585] [2023-08-30 11:55:12,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:55:12,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:55:12,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:55:12,165 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) [2023-08-30 11:55:12,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 11:55:12,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 11:55:12,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:55:12,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 11:55:12,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:55:12,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:55:12,449 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 [2023-08-30 11:55:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 11:55:12,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:55:12,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325455585] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:55:12,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:55:12,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2023-08-30 11:55:12,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200054983] [2023-08-30 11:55:12,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:55:12,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 11:55:12,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:55:12,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 11:55:12,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-08-30 11:55:12,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 478 [2023-08-30 11:55:12,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 369 transitions, 4774 flow. Second operand has 8 states, 8 states have (on average 184.625) internal successors, (1477), 8 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:12,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:55:12,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 478 [2023-08-30 11:55:12,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:55:31,992 INFO L130 PetriNetUnfolder]: 74630/114875 cut-off events. [2023-08-30 11:55:31,993 INFO L131 PetriNetUnfolder]: For 938571/939152 co-relation queries the response was YES. [2023-08-30 11:55:33,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573504 conditions, 114875 events. 74630/114875 cut-off events. For 938571/939152 co-relation queries the response was YES. Maximal size of possible extension queue 3775. Compared 946081 event pairs, 20440 based on Foata normal form. 989/103650 useless extension candidates. Maximal degree in co-relation 573427. Up to 70066 conditions per place. [2023-08-30 11:55:33,594 INFO L137 encePairwiseOnDemand]: 470/478 looper letters, 368 selfloop transitions, 87 changer transitions 0/456 dead transitions. [2023-08-30 11:55:33,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 456 transitions, 6663 flow [2023-08-30 11:55:33,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 11:55:33,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 11:55:33,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1165 transitions. [2023-08-30 11:55:33,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4062064156206416 [2023-08-30 11:55:33,596 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1165 transitions. [2023-08-30 11:55:33,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1165 transitions. [2023-08-30 11:55:33,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:55:33,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1165 transitions. [2023-08-30 11:55:33,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 194.16666666666666) internal successors, (1165), 6 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:33,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:33,600 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:33,600 INFO L175 Difference]: Start difference. First operand has 212 places, 369 transitions, 4774 flow. Second operand 6 states and 1165 transitions. [2023-08-30 11:55:33,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 456 transitions, 6663 flow [2023-08-30 11:57:12,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 456 transitions, 6574 flow, removed 31 selfloop flow, removed 1 redundant places. [2023-08-30 11:57:12,968 INFO L231 Difference]: Finished difference. Result has 218 places, 382 transitions, 5170 flow [2023-08-30 11:57:12,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=4685, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5170, PETRI_PLACES=218, PETRI_TRANSITIONS=382} [2023-08-30 11:57:12,968 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 168 predicate places. [2023-08-30 11:57:12,969 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 382 transitions, 5170 flow [2023-08-30 11:57:12,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 184.625) internal successors, (1477), 8 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:57:12,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:57:12,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:57:12,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 11:57:13,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:57:13,170 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:57:13,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:57:13,170 INFO L85 PathProgramCache]: Analyzing trace with hash -2040719849, now seen corresponding path program 3 times [2023-08-30 11:57:13,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:57:13,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153942754] [2023-08-30 11:57:13,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:57:13,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:57:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:57:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:57:13,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:57:13,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153942754] [2023-08-30 11:57:13,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153942754] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:57:13,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910106991] [2023-08-30 11:57:13,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:57:13,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:57:13,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:57:13,609 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) [2023-08-30 11:57:13,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 11:57:13,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 11:57:13,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:57:13,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 11:57:13,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:57:13,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:57:13,873 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 [2023-08-30 11:57:13,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 11:57:13,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:57:13,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910106991] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:57:13,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:57:13,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-08-30 11:57:13,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807868484] [2023-08-30 11:57:13,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:57:13,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 11:57:13,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:57:13,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 11:57:13,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-08-30 11:57:14,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 478 [2023-08-30 11:57:14,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 382 transitions, 5170 flow. Second operand has 8 states, 8 states have (on average 184.625) internal successors, (1477), 8 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:57:14,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:57:14,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 478 [2023-08-30 11:57:14,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:57:34,259 INFO L130 PetriNetUnfolder]: 77370/119955 cut-off events. [2023-08-30 11:57:34,259 INFO L131 PetriNetUnfolder]: For 1044425/1045006 co-relation queries the response was YES. [2023-08-30 11:57:35,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611809 conditions, 119955 events. 77370/119955 cut-off events. For 1044425/1045006 co-relation queries the response was YES. Maximal size of possible extension queue 4005. Compared 1004411 event pairs, 37421 based on Foata normal form. 559/107304 useless extension candidates. Maximal degree in co-relation 611729. Up to 105357 conditions per place. [2023-08-30 11:57:35,866 INFO L137 encePairwiseOnDemand]: 471/478 looper letters, 398 selfloop transitions, 62 changer transitions 0/461 dead transitions. [2023-08-30 11:57:35,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 461 transitions, 7023 flow [2023-08-30 11:57:35,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 11:57:35,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 11:57:35,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1162 transitions. [2023-08-30 11:57:35,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405160390516039 [2023-08-30 11:57:35,867 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1162 transitions. [2023-08-30 11:57:35,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1162 transitions. [2023-08-30 11:57:35,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:57:35,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1162 transitions. [2023-08-30 11:57:35,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 193.66666666666666) internal successors, (1162), 6 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:57:35,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:57:35,871 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:57:35,872 INFO L175 Difference]: Start difference. First operand has 218 places, 382 transitions, 5170 flow. Second operand 6 states and 1162 transitions. [2023-08-30 11:57:35,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 461 transitions, 7023 flow [2023-08-30 11:59:48,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 461 transitions, 6897 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-08-30 11:59:48,380 INFO L231 Difference]: Finished difference. Result has 222 places, 387 transitions, 5304 flow [2023-08-30 11:59:48,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=5056, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5304, PETRI_PLACES=222, PETRI_TRANSITIONS=387} [2023-08-30 11:59:48,381 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 172 predicate places. [2023-08-30 11:59:48,381 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 387 transitions, 5304 flow [2023-08-30 11:59:48,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 184.625) internal successors, (1477), 8 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:59:48,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:59:48,382 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:59:48,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 11:59:48,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:59:48,585 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2023-08-30 11:59:48,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:59:48,585 INFO L85 PathProgramCache]: Analyzing trace with hash 902299778, now seen corresponding path program 2 times [2023-08-30 11:59:48,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:59:48,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664150110] [2023-08-30 11:59:48,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:59:48,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:59:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:59:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:59:49,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:59:49,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664150110] [2023-08-30 11:59:49,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664150110] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:59:49,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090580496] [2023-08-30 11:59:49,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:59:49,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:59:49,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:59:49,189 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) [2023-08-30 11:59:49,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 11:59:49,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:59:49,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:59:49,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 11:59:49,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:59:49,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:59:49,463 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 [2023-08-30 11:59:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:59:49,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:59:49,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090580496] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:59:49,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:59:49,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2023-08-30 11:59:49,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436940477] [2023-08-30 11:59:49,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:59:49,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 11:59:49,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:59:49,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 11:59:49,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-08-30 11:59:49,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 478 [2023-08-30 11:59:49,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 387 transitions, 5304 flow. Second operand has 8 states, 8 states have (on average 184.625) internal successors, (1477), 8 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:59:49,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:59:49,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 478 [2023-08-30 11:59:49,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:00:12,248 INFO L130 PetriNetUnfolder]: 79271/123447 cut-off events. [2023-08-30 12:00:12,248 INFO L131 PetriNetUnfolder]: For 1081885/1082466 co-relation queries the response was YES. [2023-08-30 12:00:13,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628321 conditions, 123447 events. 79271/123447 cut-off events. For 1081885/1082466 co-relation queries the response was YES. Maximal size of possible extension queue 4159. Compared 1045667 event pairs, 36838 based on Foata normal form. 719/110326 useless extension candidates. Maximal degree in co-relation 628240. Up to 113239 conditions per place. [2023-08-30 12:00:14,324 INFO L137 encePairwiseOnDemand]: 470/478 looper letters, 386 selfloop transitions, 81 changer transitions 0/468 dead transitions. [2023-08-30 12:00:14,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 468 transitions, 7138 flow [2023-08-30 12:00:14,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 12:00:14,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 12:00:14,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1351 transitions. [2023-08-30 12:00:14,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40376569037656906 [2023-08-30 12:00:14,326 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1351 transitions. [2023-08-30 12:00:14,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1351 transitions. [2023-08-30 12:00:14,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 12:00:14,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1351 transitions. [2023-08-30 12:00:14,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 193.0) internal successors, (1351), 7 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:00:14,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:00:14,330 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 478.0) internal successors, (3824), 8 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:00:14,330 INFO L175 Difference]: Start difference. First operand has 222 places, 387 transitions, 5304 flow. Second operand 7 states and 1351 transitions. [2023-08-30 12:00:14,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 468 transitions, 7138 flow Killed by 15