./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-horseshoe.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 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 08:08:52,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 08:08:52,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 08:08:52,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 08:08:52,580 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 08:08:52,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 08:08:52,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 08:08:52,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 08:08:52,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 08:08:52,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 08:08:52,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 08:08:52,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 08:08:52,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 08:08:52,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 08:08:52,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 08:08:52,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 08:08:52,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 08:08:52,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 08:08:52,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 08:08:52,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 08:08:52,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 08:08:52,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 08:08:52,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 08:08:52,620 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 08:08:52,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 08:08:52,627 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 08:08:52,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 08:08:52,629 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 08:08:52,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 08:08:52,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 08:08:52,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 08:08:52,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 08:08:52,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 08:08:52,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 08:08:52,635 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 08:08:52,635 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 08:08:52,636 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 08:08:52,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 08:08:52,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 08:08:52,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 08:08:52,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 08:08:52,639 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 08:08:52,670 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 08:08:52,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 08:08:52,672 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 08:08:52,672 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 08:08:52,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 08:08:52,673 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 08:08:52,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 08:08:52,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 08:08:52,674 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 08:08:52,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 08:08:52,674 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 08:08:52,675 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 08:08:52,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 08:08:52,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 08:08:52,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 08:08:52,675 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 08:08:52,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 08:08:52,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 08:08:52,676 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 08:08:52,676 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 08:08:52,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 08:08:52,676 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 08:08:52,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 08:08:52,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 08:08:52,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 08:08:52,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 08:08:52,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:08:52,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 08:08:52,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 08:08:52,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 08:08:52,678 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 08:08:52,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 08:08:52,679 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 08:08:52,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 08:08:52,679 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 08:08:52,679 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 08:08:52,680 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 08:08:52,680 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 08:08:52,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 08:08:53,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 08:08:53,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 08:08:53,013 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 08:08:53,013 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 08:08:53,014 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-09-01 08:08:54,183 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 08:08:54,397 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 08:08:54,397 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-09-01 08:08:54,404 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e8d2117b/1c706e1909f34c4dbc301fb380f50aa0/FLAG93d20af73 [2023-09-01 08:08:54,415 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e8d2117b/1c706e1909f34c4dbc301fb380f50aa0 [2023-09-01 08:08:54,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 08:08:54,419 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 08:08:54,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 08:08:54,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 08:08:54,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 08:08:54,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:08:54" (1/1) ... [2023-09-01 08:08:54,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@335a8baf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:08:54, skipping insertion in model container [2023-09-01 08:08:54,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:08:54" (1/1) ... [2023-09-01 08:08:54,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 08:08:54,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 08:08:54,632 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-horseshoe.wvr.c[3424,3437] [2023-09-01 08:08:54,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:08:54,649 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 08:08:54,685 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-horseshoe.wvr.c[3424,3437] [2023-09-01 08:08:54,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:08:54,709 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:08:54,711 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:08:54,716 INFO L208 MainTranslator]: Completed translation [2023-09-01 08:08:54,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:08:54 WrapperNode [2023-09-01 08:08:54,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 08:08:54,719 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 08:08:54,719 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 08:08:54,719 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 08:08:54,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:08:54" (1/1) ... [2023-09-01 08:08:54,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:08:54" (1/1) ... [2023-09-01 08:08:54,782 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 278 [2023-09-01 08:08:54,786 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 08:08:54,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 08:08:54,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 08:08:54,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 08:08:54,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:08:54" (1/1) ... [2023-09-01 08:08:54,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:08:54" (1/1) ... [2023-09-01 08:08:54,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:08:54" (1/1) ... [2023-09-01 08:08:54,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:08:54" (1/1) ... [2023-09-01 08:08:54,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:08:54" (1/1) ... [2023-09-01 08:08:54,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:08:54" (1/1) ... [2023-09-01 08:08:54,843 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:08:54" (1/1) ... [2023-09-01 08:08:54,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:08:54" (1/1) ... [2023-09-01 08:08:54,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 08:08:54,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 08:08:54,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 08:08:54,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 08:08:54,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:08:54" (1/1) ... [2023-09-01 08:08:54,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:08:54,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:08:54,890 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 08:08:54,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 08:08:54,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 08:08:54,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 08:08:54,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 08:08:54,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 08:08:54,927 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 08:08:54,927 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 08:08:54,927 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 08:08:54,927 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 08:08:54,927 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 08:08:54,927 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 08:08:54,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 08:08:54,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 08:08:54,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 08:08:54,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 08:08:54,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 08:08:54,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 08:08:54,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 08:08:54,930 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 08:08:55,075 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 08:08:55,077 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 08:08:55,495 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 08:08:55,672 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 08:08:55,673 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-09-01 08:08:55,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:08:55 BoogieIcfgContainer [2023-09-01 08:08:55,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 08:08:55,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 08:08:55,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 08:08:55,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 08:08:55,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 08:08:54" (1/3) ... [2023-09-01 08:08:55,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2700a7b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:08:55, skipping insertion in model container [2023-09-01 08:08:55,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:08:54" (2/3) ... [2023-09-01 08:08:55,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2700a7b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:08:55, skipping insertion in model container [2023-09-01 08:08:55,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:08:55" (3/3) ... [2023-09-01 08:08:55,685 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2023-09-01 08:08:55,692 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 08:08:55,700 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 08:08:55,701 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-09-01 08:08:55,701 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 08:08:55,795 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 08:08:55,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 239 transitions, 502 flow [2023-09-01 08:08:55,944 INFO L130 PetriNetUnfolder]: 18/236 cut-off events. [2023-09-01 08:08:55,945 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 08:08:55,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 236 events. 18/236 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 238 event pairs, 0 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 188. Up to 3 conditions per place. [2023-09-01 08:08:55,951 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 239 transitions, 502 flow [2023-09-01 08:08:55,962 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 212 places, 219 transitions, 456 flow [2023-09-01 08:08:55,965 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 08:08:55,976 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 212 places, 219 transitions, 456 flow [2023-09-01 08:08:55,980 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 212 places, 219 transitions, 456 flow [2023-09-01 08:08:55,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 219 transitions, 456 flow [2023-09-01 08:08:56,040 INFO L130 PetriNetUnfolder]: 17/219 cut-off events. [2023-09-01 08:08:56,041 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 08:08:56,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 219 events. 17/219 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 238 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 188. Up to 3 conditions per place. [2023-09-01 08:08:56,051 INFO L119 LiptonReduction]: Number of co-enabled transitions 3440 [2023-09-01 08:09:04,221 INFO L134 LiptonReduction]: Checked pairs total: 7488 [2023-09-01 08:09:04,221 INFO L136 LiptonReduction]: Total number of compositions: 231 [2023-09-01 08:09:04,235 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 08:09:04,240 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;@3a29b6f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 08:09:04,241 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-09-01 08:09:04,242 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 08:09:04,243 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 08:09:04,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:09:04,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 08:09:04,245 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:09:04,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:09:04,250 INFO L85 PathProgramCache]: Analyzing trace with hash 35227, now seen corresponding path program 1 times [2023-09-01 08:09:04,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:09:04,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797532108] [2023-09-01 08:09:04,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:04,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:09:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:09:04,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:09:04,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797532108] [2023-09-01 08:09:04,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797532108] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:09:04,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:09:04,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:09:04,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890928414] [2023-09-01 08:09:04,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:09:04,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:09:04,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:09:04,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:09:04,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:09:04,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 470 [2023-09-01 08:09:04,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:04,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:09:04,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 470 [2023-09-01 08:09:04,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:09:05,744 INFO L130 PetriNetUnfolder]: 7769/10041 cut-off events. [2023-09-01 08:09:05,744 INFO L131 PetriNetUnfolder]: For 274/274 co-relation queries the response was YES. [2023-09-01 08:09:05,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20476 conditions, 10041 events. 7769/10041 cut-off events. For 274/274 co-relation queries the response was YES. Maximal size of possible extension queue 982. Compared 50096 event pairs, 4235 based on Foata normal form. 0/3149 useless extension candidates. Maximal degree in co-relation 9182. Up to 4994 conditions per place. [2023-09-01 08:09:05,811 INFO L137 encePairwiseOnDemand]: 456/470 looper letters, 79 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-09-01 08:09:05,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 86 transitions, 374 flow [2023-09-01 08:09:05,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:09:05,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:09:05,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 687 transitions. [2023-09-01 08:09:05,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48723404255319147 [2023-09-01 08:09:05,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 687 transitions. [2023-09-01 08:09:05,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 687 transitions. [2023-09-01 08:09:05,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:09:05,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 687 transitions. [2023-09-01 08:09:05,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:05,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:05,846 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:05,848 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 124 flow. Second operand 3 states and 687 transitions. [2023-09-01 08:09:05,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 86 transitions, 374 flow [2023-09-01 08:09:05,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 86 transitions, 350 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 08:09:05,889 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 136 flow [2023-09-01 08:09:05,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2023-09-01 08:09:05,894 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -7 predicate places. [2023-09-01 08:09:05,896 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 136 flow [2023-09-01 08:09:05,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:05,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:09:05,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 08:09:05,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 08:09:05,898 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:09:05,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:09:05,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1094125, now seen corresponding path program 1 times [2023-09-01 08:09:05,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:09:05,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663157231] [2023-09-01 08:09:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:05,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:09:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:06,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:09:06,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:09:06,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663157231] [2023-09-01 08:09:06,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663157231] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:09:06,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:09:06,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:09:06,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996441668] [2023-09-01 08:09:06,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:09:06,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:09:06,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:09:06,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:09:06,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:09:06,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 470 [2023-09-01 08:09:06,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:06,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:09:06,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 470 [2023-09-01 08:09:06,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:09:07,046 INFO L130 PetriNetUnfolder]: 7777/10047 cut-off events. [2023-09-01 08:09:07,047 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 08:09:07,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20211 conditions, 10047 events. 7777/10047 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 1051. Compared 50689 event pairs, 4236 based on Foata normal form. 0/3105 useless extension candidates. Maximal degree in co-relation 10094. Up to 9991 conditions per place. [2023-09-01 08:09:07,118 INFO L137 encePairwiseOnDemand]: 467/470 looper letters, 44 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-09-01 08:09:07,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 218 flow [2023-09-01 08:09:07,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:09:07,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:09:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 632 transitions. [2023-09-01 08:09:07,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482269503546099 [2023-09-01 08:09:07,122 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 632 transitions. [2023-09-01 08:09:07,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 632 transitions. [2023-09-01 08:09:07,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:09:07,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 632 transitions. [2023-09-01 08:09:07,125 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) [2023-09-01 08:09:07,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:07,131 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:07,131 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 136 flow. Second operand 3 states and 632 transitions. [2023-09-01 08:09:07,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 218 flow [2023-09-01 08:09:07,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 210 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 08:09:07,134 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 122 flow [2023-09-01 08:09:07,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-09-01 08:09:07,135 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2023-09-01 08:09:07,135 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 122 flow [2023-09-01 08:09:07,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:07,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:09:07,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 08:09:07,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 08:09:07,137 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:09:07,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:09:07,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1094140, now seen corresponding path program 1 times [2023-09-01 08:09:07,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:09:07,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981870701] [2023-09-01 08:09:07,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:07,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:09:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:09:07,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:09:07,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981870701] [2023-09-01 08:09:07,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981870701] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:09:07,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202882440] [2023-09-01 08:09:07,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:07,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:09:07,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:09:07,264 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:09:07,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 08:09:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:07,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:09:07,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:09:07,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:09:07,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:09:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:09:07,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202882440] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:09:07,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:09:07,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-09-01 08:09:07,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559791017] [2023-09-01 08:09:07,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:09:07,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:09:07,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:09:07,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:09:07,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 08:09:07,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 470 [2023-09-01 08:09:07,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 122 flow. Second operand has 7 states, 7 states have (on average 197.14285714285714) internal successors, (1380), 7 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:07,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:09:07,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 470 [2023-09-01 08:09:07,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:09:09,991 INFO L130 PetriNetUnfolder]: 19409/25081 cut-off events. [2023-09-01 08:09:09,991 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 08:09:10,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50431 conditions, 25081 events. 19409/25081 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 1687. Compared 137497 event pairs, 10586 based on Foata normal form. 0/7948 useless extension candidates. Maximal degree in co-relation 50423. Up to 4997 conditions per place. [2023-09-01 08:09:10,126 INFO L137 encePairwiseOnDemand]: 464/470 looper letters, 185 selfloop transitions, 13 changer transitions 0/201 dead transitions. [2023-09-01 08:09:10,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 201 transitions, 866 flow [2023-09-01 08:09:10,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 08:09:10,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 08:09:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1380 transitions. [2023-09-01 08:09:10,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2023-09-01 08:09:10,132 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1380 transitions. [2023-09-01 08:09:10,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1380 transitions. [2023-09-01 08:09:10,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:09:10,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1380 transitions. [2023-09-01 08:09:10,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:10,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:10,144 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:10,144 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 122 flow. Second operand 6 states and 1380 transitions. [2023-09-01 08:09:10,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 201 transitions, 866 flow [2023-09-01 08:09:10,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 201 transitions, 865 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:09:10,150 INFO L231 Difference]: Finished difference. Result has 55 places, 57 transitions, 214 flow [2023-09-01 08:09:10,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=55, PETRI_TRANSITIONS=57} [2023-09-01 08:09:10,151 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-09-01 08:09:10,151 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 57 transitions, 214 flow [2023-09-01 08:09:10,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 197.14285714285714) internal successors, (1380), 7 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:10,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:09:10,153 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 08:09:10,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 08:09:10,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:09:10,367 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:09:10,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:09:10,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1762587094, now seen corresponding path program 2 times [2023-09-01 08:09:10,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:09:10,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953066001] [2023-09-01 08:09:10,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:10,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:09:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:09:10,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:09:10,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953066001] [2023-09-01 08:09:10,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953066001] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:09:10,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751927281] [2023-09-01 08:09:10,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:09:10,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:09:10,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:09:10,501 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:09:10,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 08:09:10,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:09:10,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:09:10,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 08:09:10,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:09:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:09:10,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:09:10,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751927281] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:09:10,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:09:10,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-09-01 08:09:10,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727738311] [2023-09-01 08:09:10,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:09:10,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:09:10,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:09:10,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:09:10,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 08:09:10,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 470 [2023-09-01 08:09:10,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 57 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:10,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:09:10,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 470 [2023-09-01 08:09:10,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:09:12,625 INFO L130 PetriNetUnfolder]: 19441/25111 cut-off events. [2023-09-01 08:09:12,625 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-09-01 08:09:12,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50520 conditions, 25111 events. 19441/25111 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 2003. Compared 139441 event pairs, 10590 based on Foata normal form. 2/7761 useless extension candidates. Maximal degree in co-relation 50508. Up to 24971 conditions per place. [2023-09-01 08:09:12,732 INFO L137 encePairwiseOnDemand]: 467/470 looper letters, 51 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-09-01 08:09:12,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 298 flow [2023-09-01 08:09:12,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:09:12,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:09:12,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 636 transitions. [2023-09-01 08:09:12,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.451063829787234 [2023-09-01 08:09:12,735 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 636 transitions. [2023-09-01 08:09:12,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 636 transitions. [2023-09-01 08:09:12,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:09:12,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 636 transitions. [2023-09-01 08:09:12,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:12,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:12,741 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:12,742 INFO L175 Difference]: Start difference. First operand has 55 places, 57 transitions, 214 flow. Second operand 3 states and 636 transitions. [2023-09-01 08:09:12,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 298 flow [2023-09-01 08:09:12,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 253 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-09-01 08:09:12,744 INFO L231 Difference]: Finished difference. Result has 50 places, 55 transitions, 151 flow [2023-09-01 08:09:12,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=50, PETRI_TRANSITIONS=55} [2023-09-01 08:09:12,746 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -7 predicate places. [2023-09-01 08:09:12,746 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 55 transitions, 151 flow [2023-09-01 08:09:12,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:12,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:09:12,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 08:09:12,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 08:09:12,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-09-01 08:09:12,954 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:09:12,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:09:12,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1760136119, now seen corresponding path program 1 times [2023-09-01 08:09:12,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:09:12,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774796827] [2023-09-01 08:09:12,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:12,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:09:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:09:13,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:09:13,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774796827] [2023-09-01 08:09:13,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774796827] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:09:13,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:09:13,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:09:13,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515410026] [2023-09-01 08:09:13,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:09:13,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:09:13,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:09:13,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:09:13,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 08:09:13,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 470 [2023-09-01 08:09:13,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 55 transitions, 151 flow. Second operand has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:13,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:09:13,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 470 [2023-09-01 08:09:13,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:09:14,931 INFO L130 PetriNetUnfolder]: 19451/25221 cut-off events. [2023-09-01 08:09:14,931 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 08:09:14,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50714 conditions, 25221 events. 19451/25221 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 2043. Compared 140790 event pairs, 10605 based on Foata normal form. 139/8225 useless extension candidates. Maximal degree in co-relation 50705. Up to 24925 conditions per place. [2023-09-01 08:09:15,050 INFO L137 encePairwiseOnDemand]: 458/470 looper letters, 75 selfloop transitions, 4 changer transitions 2/84 dead transitions. [2023-09-01 08:09:15,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 387 flow [2023-09-01 08:09:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 08:09:15,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 08:09:15,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1044 transitions. [2023-09-01 08:09:15,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4442553191489362 [2023-09-01 08:09:15,054 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1044 transitions. [2023-09-01 08:09:15,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1044 transitions. [2023-09-01 08:09:15,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:09:15,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1044 transitions. [2023-09-01 08:09:15,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 208.8) internal successors, (1044), 5 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:15,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:15,066 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:15,066 INFO L175 Difference]: Start difference. First operand has 50 places, 55 transitions, 151 flow. Second operand 5 states and 1044 transitions. [2023-09-01 08:09:15,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 387 flow [2023-09-01 08:09:15,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 84 transitions, 386 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:09:15,069 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 199 flow [2023-09-01 08:09:15,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2023-09-01 08:09:15,072 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-09-01 08:09:15,072 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 199 flow [2023-09-01 08:09:15,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:15,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:09:15,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:09:15,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 08:09:15,074 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:09:15,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:09:15,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1196827547, now seen corresponding path program 1 times [2023-09-01 08:09:15,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:09:15,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455598842] [2023-09-01 08:09:15,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:15,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:09:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:09:15,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:09:15,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455598842] [2023-09-01 08:09:15,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455598842] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:09:15,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335147835] [2023-09-01 08:09:15,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:15,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:09:15,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:09:15,204 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:09:15,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 08:09:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:15,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:09:15,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:09:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:09:15,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:09:15,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335147835] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:09:15,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:09:15,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-09-01 08:09:15,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356117769] [2023-09-01 08:09:15,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:09:15,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:09:15,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:09:15,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:09:15,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 08:09:15,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 470 [2023-09-01 08:09:15,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 199 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) [2023-09-01 08:09:15,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:09:15,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 470 [2023-09-01 08:09:15,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:09:16,586 INFO L130 PetriNetUnfolder]: 12431/16371 cut-off events. [2023-09-01 08:09:16,586 INFO L131 PetriNetUnfolder]: For 5660/5660 co-relation queries the response was YES. [2023-09-01 08:09:16,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44507 conditions, 16371 events. 12431/16371 cut-off events. For 5660/5660 co-relation queries the response was YES. Maximal size of possible extension queue 1336. Compared 89690 event pairs, 6930 based on Foata normal form. 0/6027 useless extension candidates. Maximal degree in co-relation 44495. Up to 16281 conditions per place. [2023-09-01 08:09:16,682 INFO L137 encePairwiseOnDemand]: 466/470 looper letters, 49 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-09-01 08:09:16,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 281 flow [2023-09-01 08:09:16,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:09:16,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:09:16,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 640 transitions. [2023-09-01 08:09:16,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45390070921985815 [2023-09-01 08:09:16,686 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 640 transitions. [2023-09-01 08:09:16,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 640 transitions. [2023-09-01 08:09:16,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:09:16,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 640 transitions. [2023-09-01 08:09:16,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:16,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:16,691 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:16,691 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 199 flow. Second operand 3 states and 640 transitions. [2023-09-01 08:09:16,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 281 flow [2023-09-01 08:09:16,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 275 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 08:09:16,694 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 177 flow [2023-09-01 08:09:16,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2023-09-01 08:09:16,695 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2023-09-01 08:09:16,695 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 177 flow [2023-09-01 08:09:16,695 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) [2023-09-01 08:09:16,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:09:16,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:09:16,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 08:09:16,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:09:16,901 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:09:16,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:09:16,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1196827669, now seen corresponding path program 1 times [2023-09-01 08:09:16,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:09:16,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585371747] [2023-09-01 08:09:16,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:16,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:09:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:09:16,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:09:16,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585371747] [2023-09-01 08:09:16,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585371747] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:09:16,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:09:16,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:09:16,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753175355] [2023-09-01 08:09:16,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:09:16,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:09:16,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:09:16,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:09:16,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:09:16,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 470 [2023-09-01 08:09:16,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:16,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:09:16,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 470 [2023-09-01 08:09:16,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:09:18,714 INFO L130 PetriNetUnfolder]: 16321/22241 cut-off events. [2023-09-01 08:09:18,714 INFO L131 PetriNetUnfolder]: For 4936/4936 co-relation queries the response was YES. [2023-09-01 08:09:18,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54815 conditions, 22241 events. 16321/22241 cut-off events. For 4936/4936 co-relation queries the response was YES. Maximal size of possible extension queue 1781. Compared 140242 event pairs, 7110 based on Foata normal form. 0/9362 useless extension candidates. Maximal degree in co-relation 54802. Up to 14747 conditions per place. [2023-09-01 08:09:18,830 INFO L137 encePairwiseOnDemand]: 466/470 looper letters, 78 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-09-01 08:09:18,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 82 transitions, 412 flow [2023-09-01 08:09:18,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:09:18,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:09:18,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 669 transitions. [2023-09-01 08:09:18,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474468085106383 [2023-09-01 08:09:18,833 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 669 transitions. [2023-09-01 08:09:18,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 669 transitions. [2023-09-01 08:09:18,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:09:18,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 669 transitions. [2023-09-01 08:09:18,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:18,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:18,838 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:18,838 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 177 flow. Second operand 3 states and 669 transitions. [2023-09-01 08:09:18,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 82 transitions, 412 flow [2023-09-01 08:09:18,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 82 transitions, 411 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:09:18,842 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 194 flow [2023-09-01 08:09:18,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2023-09-01 08:09:18,843 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-09-01 08:09:18,843 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 194 flow [2023-09-01 08:09:18,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:18,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:09:18,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:09:18,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 08:09:18,844 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:09:18,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:09:18,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1553045275, now seen corresponding path program 1 times [2023-09-01 08:09:18,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:09:18,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853003150] [2023-09-01 08:09:18,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:18,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:09:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:09:18,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:09:18,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853003150] [2023-09-01 08:09:18,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853003150] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:09:18,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422238996] [2023-09-01 08:09:18,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:18,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:09:18,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:09:18,901 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:09:18,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 08:09:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:18,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:09:19,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:09:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:09:19,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:09:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:09:19,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422238996] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:09:19,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:09:19,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 08:09:19,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258286982] [2023-09-01 08:09:19,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:09:19,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:09:19,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:09:19,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:09:19,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 08:09:19,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 470 [2023-09-01 08:09:19,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 194 flow. Second operand has 7 states, 7 states have (on average 201.85714285714286) internal successors, (1413), 7 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:19,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:09:19,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 470 [2023-09-01 08:09:19,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:09:22,066 INFO L130 PetriNetUnfolder]: 34261/45896 cut-off events. [2023-09-01 08:09:22,066 INFO L131 PetriNetUnfolder]: For 15251/15251 co-relation queries the response was YES. [2023-09-01 08:09:22,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124041 conditions, 45896 events. 34261/45896 cut-off events. For 15251/15251 co-relation queries the response was YES. Maximal size of possible extension queue 2830. Compared 300174 event pairs, 5390 based on Foata normal form. 0/22027 useless extension candidates. Maximal degree in co-relation 124027. Up to 12222 conditions per place. [2023-09-01 08:09:22,597 INFO L137 encePairwiseOnDemand]: 466/470 looper letters, 179 selfloop transitions, 9 changer transitions 0/190 dead transitions. [2023-09-01 08:09:22,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 190 transitions, 936 flow [2023-09-01 08:09:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 08:09:22,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 08:09:22,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1578 transitions. [2023-09-01 08:09:22,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796352583586626 [2023-09-01 08:09:22,602 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1578 transitions. [2023-09-01 08:09:22,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1578 transitions. [2023-09-01 08:09:22,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:09:22,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1578 transitions. [2023-09-01 08:09:22,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 225.42857142857142) internal successors, (1578), 7 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:22,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:22,610 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:22,611 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 194 flow. Second operand 7 states and 1578 transitions. [2023-09-01 08:09:22,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 190 transitions, 936 flow [2023-09-01 08:09:22,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 190 transitions, 934 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:09:22,618 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 275 flow [2023-09-01 08:09:22,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=275, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2023-09-01 08:09:22,620 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2023-09-01 08:09:22,620 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 275 flow [2023-09-01 08:09:22,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 201.85714285714286) internal successors, (1413), 7 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:22,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:09:22,621 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:09:22,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 08:09:22,826 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 [2023-09-01 08:09:22,827 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:09:22,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:09:22,827 INFO L85 PathProgramCache]: Analyzing trace with hash -899760642, now seen corresponding path program 1 times [2023-09-01 08:09:22,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:09:22,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545403115] [2023-09-01 08:09:22,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:22,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:09:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:09:22,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:09:22,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545403115] [2023-09-01 08:09:22,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545403115] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:09:22,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162204921] [2023-09-01 08:09:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:22,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:09:22,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:09:22,977 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:09:23,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 08:09:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:23,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 08:09:23,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:09:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:09:23,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:09:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:09:23,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162204921] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:09:23,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:09:23,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2023-09-01 08:09:23,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522709042] [2023-09-01 08:09:23,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:09:23,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 08:09:23,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:09:23,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 08:09:23,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-09-01 08:09:23,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 470 [2023-09-01 08:09:23,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 275 flow. Second operand has 12 states, 12 states have (on average 187.58333333333334) internal successors, (2251), 12 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:23,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:09:23,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 470 [2023-09-01 08:09:23,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:09:27,770 INFO L130 PetriNetUnfolder]: 36961/50451 cut-off events. [2023-09-01 08:09:27,771 INFO L131 PetriNetUnfolder]: For 135526/138026 co-relation queries the response was YES. [2023-09-01 08:09:27,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144165 conditions, 50451 events. 36961/50451 cut-off events. For 135526/138026 co-relation queries the response was YES. Maximal size of possible extension queue 2999. Compared 335831 event pairs, 20875 based on Foata normal form. 5540/31157 useless extension candidates. Maximal degree in co-relation 144148. Up to 42173 conditions per place. [2023-09-01 08:09:28,011 INFO L137 encePairwiseOnDemand]: 462/470 looper letters, 131 selfloop transitions, 10 changer transitions 3/147 dead transitions. [2023-09-01 08:09:28,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 147 transitions, 795 flow [2023-09-01 08:09:28,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 08:09:28,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 08:09:28,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1800 transitions. [2023-09-01 08:09:28,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425531914893617 [2023-09-01 08:09:28,016 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1800 transitions. [2023-09-01 08:09:28,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1800 transitions. [2023-09-01 08:09:28,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:09:28,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1800 transitions. [2023-09-01 08:09:28,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 200.0) internal successors, (1800), 9 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:28,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 470.0) internal successors, (4700), 10 states have internal predecessors, (4700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:28,027 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 470.0) internal successors, (4700), 10 states have internal predecessors, (4700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:28,027 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 275 flow. Second operand 9 states and 1800 transitions. [2023-09-01 08:09:28,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 147 transitions, 795 flow [2023-09-01 08:09:28,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 147 transitions, 780 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 08:09:28,065 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 332 flow [2023-09-01 08:09:28,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=332, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2023-09-01 08:09:28,066 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 16 predicate places. [2023-09-01 08:09:28,066 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 332 flow [2023-09-01 08:09:28,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 187.58333333333334) internal successors, (2251), 12 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:28,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:09:28,067 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:09:28,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 08:09:28,273 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 [2023-09-01 08:09:28,273 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:09:28,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:09:28,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1115655072, now seen corresponding path program 2 times [2023-09-01 08:09:28,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:09:28,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552731334] [2023-09-01 08:09:28,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:28,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:09:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:09:28,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:09:28,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552731334] [2023-09-01 08:09:28,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552731334] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:09:28,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047521643] [2023-09-01 08:09:28,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:09:28,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:09:28,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:09:28,329 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:09:28,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 08:09:28,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:09:28,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:09:28,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:09:28,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:09:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:09:28,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:09:28,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047521643] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:09:28,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:09:28,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-09-01 08:09:28,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324838195] [2023-09-01 08:09:28,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:09:28,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:09:28,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:09:28,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:09:28,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 08:09:28,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 470 [2023-09-01 08:09:28,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 332 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) [2023-09-01 08:09:28,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:09:28,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 470 [2023-09-01 08:09:28,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:09:32,470 INFO L130 PetriNetUnfolder]: 37881/52076 cut-off events. [2023-09-01 08:09:32,470 INFO L131 PetriNetUnfolder]: For 28049/28049 co-relation queries the response was YES. [2023-09-01 08:09:32,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147464 conditions, 52076 events. 37881/52076 cut-off events. For 28049/28049 co-relation queries the response was YES. Maximal size of possible extension queue 3119. Compared 361995 event pairs, 1945 based on Foata normal form. 1280/28063 useless extension candidates. Maximal degree in co-relation 147442. Up to 34140 conditions per place. [2023-09-01 08:09:32,795 INFO L137 encePairwiseOnDemand]: 467/470 looper letters, 102 selfloop transitions, 3 changer transitions 0/107 dead transitions. [2023-09-01 08:09:32,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 107 transitions, 632 flow [2023-09-01 08:09:32,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:09:32,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:09:32,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 885 transitions. [2023-09-01 08:09:32,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47074468085106386 [2023-09-01 08:09:32,797 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 885 transitions. [2023-09-01 08:09:32,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 885 transitions. [2023-09-01 08:09:32,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:09:32,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 885 transitions. [2023-09-01 08:09:32,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 221.25) internal successors, (885), 4 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:32,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 470.0) internal successors, (2350), 5 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:32,803 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 470.0) internal successors, (2350), 5 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:32,803 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 332 flow. Second operand 4 states and 885 transitions. [2023-09-01 08:09:32,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 107 transitions, 632 flow [2023-09-01 08:09:33,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 107 transitions, 615 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-09-01 08:09:33,064 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 284 flow [2023-09-01 08:09:33,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2023-09-01 08:09:33,066 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2023-09-01 08:09:33,066 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 284 flow [2023-09-01 08:09:33,067 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) [2023-09-01 08:09:33,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:09:33,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:09:33,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 08:09:33,276 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 [2023-09-01 08:09:33,276 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:09:33,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:09:33,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1897036264, now seen corresponding path program 1 times [2023-09-01 08:09:33,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:09:33,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540873422] [2023-09-01 08:09:33,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:33,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:09:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:09:33,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:09:33,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540873422] [2023-09-01 08:09:33,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540873422] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:09:33,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:09:33,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 08:09:33,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72534430] [2023-09-01 08:09:33,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:09:33,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:09:33,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:09:33,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:09:33,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 08:09:33,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 470 [2023-09-01 08:09:33,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 284 flow. Second operand has 4 states, 4 states have (on average 194.25) internal successors, (777), 4 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:33,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:09:33,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 470 [2023-09-01 08:09:33,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:09:36,538 INFO L130 PetriNetUnfolder]: 26974/37454 cut-off events. [2023-09-01 08:09:36,538 INFO L131 PetriNetUnfolder]: For 85194/87218 co-relation queries the response was YES. [2023-09-01 08:09:36,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108461 conditions, 37454 events. 26974/37454 cut-off events. For 85194/87218 co-relation queries the response was YES. Maximal size of possible extension queue 2375. Compared 254108 event pairs, 18102 based on Foata normal form. 2172/21499 useless extension candidates. Maximal degree in co-relation 108440. Up to 36992 conditions per place. [2023-09-01 08:09:36,767 INFO L137 encePairwiseOnDemand]: 454/470 looper letters, 62 selfloop transitions, 9 changer transitions 6/80 dead transitions. [2023-09-01 08:09:36,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 80 transitions, 579 flow [2023-09-01 08:09:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 08:09:36,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 08:09:36,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1022 transitions. [2023-09-01 08:09:36,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4348936170212766 [2023-09-01 08:09:36,770 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1022 transitions. [2023-09-01 08:09:36,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1022 transitions. [2023-09-01 08:09:36,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:09:36,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1022 transitions. [2023-09-01 08:09:36,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 204.4) internal successors, (1022), 5 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:36,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:36,776 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 470.0) internal successors, (2820), 6 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:36,776 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 284 flow. Second operand 5 states and 1022 transitions. [2023-09-01 08:09:36,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 80 transitions, 579 flow [2023-09-01 08:09:36,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 80 transitions, 573 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 08:09:36,804 INFO L231 Difference]: Finished difference. Result has 75 places, 61 transitions, 335 flow [2023-09-01 08:09:36,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=335, PETRI_PLACES=75, PETRI_TRANSITIONS=61} [2023-09-01 08:09:36,804 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2023-09-01 08:09:36,804 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 61 transitions, 335 flow [2023-09-01 08:09:36,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.25) internal successors, (777), 4 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:36,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:09:36,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:09:36,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 08:09:36,806 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:09:36,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:09:36,806 INFO L85 PathProgramCache]: Analyzing trace with hash -639398407, now seen corresponding path program 1 times [2023-09-01 08:09:36,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:09:36,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941437955] [2023-09-01 08:09:36,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:36,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:09:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:09:36,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:09:36,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941437955] [2023-09-01 08:09:36,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941437955] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:09:36,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:09:36,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:09:36,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617315010] [2023-09-01 08:09:36,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:09:36,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:09:36,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:09:36,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:09:36,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:09:36,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 470 [2023-09-01 08:09:36,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 61 transitions, 335 flow. Second operand has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:36,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:09:36,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 470 [2023-09-01 08:09:36,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:09:40,358 INFO L130 PetriNetUnfolder]: 27186/37986 cut-off events. [2023-09-01 08:09:40,358 INFO L131 PetriNetUnfolder]: For 104034/106178 co-relation queries the response was YES. [2023-09-01 08:09:40,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131302 conditions, 37986 events. 27186/37986 cut-off events. For 104034/106178 co-relation queries the response was YES. Maximal size of possible extension queue 2223. Compared 240250 event pairs, 5338 based on Foata normal form. 2944/22150 useless extension candidates. Maximal degree in co-relation 131278. Up to 34169 conditions per place. [2023-09-01 08:09:40,568 INFO L137 encePairwiseOnDemand]: 460/470 looper letters, 70 selfloop transitions, 5 changer transitions 3/81 dead transitions. [2023-09-01 08:09:40,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 81 transitions, 619 flow [2023-09-01 08:09:40,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:09:40,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:09:40,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 651 transitions. [2023-09-01 08:09:40,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46170212765957447 [2023-09-01 08:09:40,572 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 651 transitions. [2023-09-01 08:09:40,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 651 transitions. [2023-09-01 08:09:40,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:09:40,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 651 transitions. [2023-09-01 08:09:40,589 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) [2023-09-01 08:09:40,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:40,592 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:40,592 INFO L175 Difference]: Start difference. First operand has 75 places, 61 transitions, 335 flow. Second operand 3 states and 651 transitions. [2023-09-01 08:09:40,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 81 transitions, 619 flow [2023-09-01 08:09:40,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 81 transitions, 598 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-09-01 08:09:40,612 INFO L231 Difference]: Finished difference. Result has 75 places, 62 transitions, 340 flow [2023-09-01 08:09:40,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=340, PETRI_PLACES=75, PETRI_TRANSITIONS=62} [2023-09-01 08:09:40,613 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2023-09-01 08:09:40,613 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 62 transitions, 340 flow [2023-09-01 08:09:40,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:40,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:09:40,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:09:40,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 08:09:40,614 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:09:40,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:09:40,615 INFO L85 PathProgramCache]: Analyzing trace with hash 366182754, now seen corresponding path program 1 times [2023-09-01 08:09:40,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:09:40,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865373024] [2023-09-01 08:09:40,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:40,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:09:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:40,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 08:09:40,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:09:40,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865373024] [2023-09-01 08:09:40,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865373024] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:09:40,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:09:40,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:09:40,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766091364] [2023-09-01 08:09:40,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:09:40,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:09:40,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:09:40,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:09:40,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:09:40,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 470 [2023-09-01 08:09:40,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 62 transitions, 340 flow. Second operand has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:40,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:09:40,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 470 [2023-09-01 08:09:40,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:09:43,906 INFO L130 PetriNetUnfolder]: 24131/33774 cut-off events. [2023-09-01 08:09:43,906 INFO L131 PetriNetUnfolder]: For 62589/62669 co-relation queries the response was YES. [2023-09-01 08:09:43,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132157 conditions, 33774 events. 24131/33774 cut-off events. For 62589/62669 co-relation queries the response was YES. Maximal size of possible extension queue 2254. Compared 211014 event pairs, 9756 based on Foata normal form. 120/18202 useless extension candidates. Maximal degree in co-relation 132133. Up to 33655 conditions per place. [2023-09-01 08:09:44,064 INFO L137 encePairwiseOnDemand]: 466/470 looper letters, 59 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2023-09-01 08:09:44,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 482 flow [2023-09-01 08:09:44,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:09:44,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:09:44,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 632 transitions. [2023-09-01 08:09:44,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482269503546099 [2023-09-01 08:09:44,066 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 632 transitions. [2023-09-01 08:09:44,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 632 transitions. [2023-09-01 08:09:44,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:09:44,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 632 transitions. [2023-09-01 08:09:44,067 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) [2023-09-01 08:09:44,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:44,068 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:44,069 INFO L175 Difference]: Start difference. First operand has 75 places, 62 transitions, 340 flow. Second operand 3 states and 632 transitions. [2023-09-01 08:09:44,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 482 flow [2023-09-01 08:09:44,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 67 transitions, 455 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-09-01 08:09:44,087 INFO L231 Difference]: Finished difference. Result has 71 places, 62 transitions, 334 flow [2023-09-01 08:09:44,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=334, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2023-09-01 08:09:44,087 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2023-09-01 08:09:44,088 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 334 flow [2023-09-01 08:09:44,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:44,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:09:44,088 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 08:09:44,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 08:09:44,088 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:09:44,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:09:44,089 INFO L85 PathProgramCache]: Analyzing trace with hash 2026630147, now seen corresponding path program 2 times [2023-09-01 08:09:44,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:09:44,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417257554] [2023-09-01 08:09:44,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:44,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:09:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:09:44,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:09:44,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417257554] [2023-09-01 08:09:44,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417257554] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:09:44,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686084419] [2023-09-01 08:09:44,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:09:44,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:09:44,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:09:44,209 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:09:44,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 08:09:44,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:09:44,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:09:44,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:09:44,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:09:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-09-01 08:09:44,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:09:44,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686084419] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:09:44,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:09:44,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-09-01 08:09:44,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387082753] [2023-09-01 08:09:44,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:09:44,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:09:44,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:09:44,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:09:44,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 08:09:44,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 470 [2023-09-01 08:09:44,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 334 flow. Second operand has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:44,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:09:44,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 470 [2023-09-01 08:09:44,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:09:46,920 INFO L130 PetriNetUnfolder]: 22579/31766 cut-off events. [2023-09-01 08:09:46,921 INFO L131 PetriNetUnfolder]: For 53640/53720 co-relation queries the response was YES. [2023-09-01 08:09:46,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119448 conditions, 31766 events. 22579/31766 cut-off events. For 53640/53720 co-relation queries the response was YES. Maximal size of possible extension queue 2122. Compared 199005 event pairs, 12732 based on Foata normal form. 626/17572 useless extension candidates. Maximal degree in co-relation 119424. Up to 31646 conditions per place. [2023-09-01 08:09:47,081 INFO L137 encePairwiseOnDemand]: 468/470 looper letters, 56 selfloop transitions, 1 changer transitions 1/61 dead transitions. [2023-09-01 08:09:47,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 61 transitions, 438 flow [2023-09-01 08:09:47,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:09:47,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:09:47,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 636 transitions. [2023-09-01 08:09:47,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.451063829787234 [2023-09-01 08:09:47,083 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 636 transitions. [2023-09-01 08:09:47,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 636 transitions. [2023-09-01 08:09:47,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:09:47,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 636 transitions. [2023-09-01 08:09:47,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:47,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:47,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:47,086 INFO L175 Difference]: Start difference. First operand has 71 places, 62 transitions, 334 flow. Second operand 3 states and 636 transitions. [2023-09-01 08:09:47,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 61 transitions, 438 flow [2023-09-01 08:09:47,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 61 transitions, 405 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-09-01 08:09:47,105 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 285 flow [2023-09-01 08:09:47,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=285, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2023-09-01 08:09:47,106 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2023-09-01 08:09:47,106 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 285 flow [2023-09-01 08:09:47,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:47,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:09:47,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:09:47,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 08:09:47,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:09:47,311 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:09:47,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:09:47,311 INFO L85 PathProgramCache]: Analyzing trace with hash 672794766, now seen corresponding path program 1 times [2023-09-01 08:09:47,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:09:47,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239812091] [2023-09-01 08:09:47,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:47,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:09:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:09:48,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:09:48,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239812091] [2023-09-01 08:09:48,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239812091] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:09:48,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244985621] [2023-09-01 08:09:48,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:48,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:09:48,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:09:48,081 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:09:48,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 08:09:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:48,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 08:09:48,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:09:48,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:09:48,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 08:09:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:09:48,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:09:48,491 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_483 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_483) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483649)) is different from false [2023-09-01 08:09:48,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:09:48,538 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 42 treesize of output 34 [2023-09-01 08:09:48,547 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 9 treesize of output 3 [2023-09-01 08:09:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:09:48,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244985621] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:09:48,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:09:48,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 19 [2023-09-01 08:09:48,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748313155] [2023-09-01 08:09:48,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:09:48,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 08:09:48,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:09:48,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 08:09:48,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=319, Unknown=1, NotChecked=36, Total=420 [2023-09-01 08:09:48,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 470 [2023-09-01 08:09:48,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 285 flow. Second operand has 21 states, 21 states have (on average 140.66666666666666) internal successors, (2954), 21 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:48,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:09:48,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 470 [2023-09-01 08:09:48,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:09:53,172 INFO L130 PetriNetUnfolder]: 26081/37081 cut-off events. [2023-09-01 08:09:53,172 INFO L131 PetriNetUnfolder]: For 29800/29908 co-relation queries the response was YES. [2023-09-01 08:09:53,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131205 conditions, 37081 events. 26081/37081 cut-off events. For 29800/29908 co-relation queries the response was YES. Maximal size of possible extension queue 2312. Compared 247281 event pairs, 1588 based on Foata normal form. 108/20529 useless extension candidates. Maximal degree in co-relation 131184. Up to 21825 conditions per place. [2023-09-01 08:09:53,426 INFO L137 encePairwiseOnDemand]: 450/470 looper letters, 203 selfloop transitions, 64 changer transitions 0/269 dead transitions. [2023-09-01 08:09:53,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 269 transitions, 1701 flow [2023-09-01 08:09:53,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 08:09:53,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 08:09:53,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3159 transitions. [2023-09-01 08:09:53,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3200607902735562 [2023-09-01 08:09:53,432 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3159 transitions. [2023-09-01 08:09:53,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3159 transitions. [2023-09-01 08:09:53,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:09:53,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3159 transitions. [2023-09-01 08:09:53,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 150.42857142857142) internal successors, (3159), 21 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:53,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 470.0) internal successors, (10340), 22 states have internal predecessors, (10340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:53,447 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 470.0) internal successors, (10340), 22 states have internal predecessors, (10340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:53,447 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 285 flow. Second operand 21 states and 3159 transitions. [2023-09-01 08:09:53,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 269 transitions, 1701 flow [2023-09-01 08:09:53,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 269 transitions, 1700 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:09:53,457 INFO L231 Difference]: Finished difference. Result has 98 places, 112 transitions, 847 flow [2023-09-01 08:09:53,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=847, PETRI_PLACES=98, PETRI_TRANSITIONS=112} [2023-09-01 08:09:53,458 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 41 predicate places. [2023-09-01 08:09:53,458 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 112 transitions, 847 flow [2023-09-01 08:09:53,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 140.66666666666666) internal successors, (2954), 21 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:53,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:09:53,459 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:09:53,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 08:09:53,667 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 [2023-09-01 08:09:53,668 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:09:53,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:09:53,668 INFO L85 PathProgramCache]: Analyzing trace with hash -111879881, now seen corresponding path program 1 times [2023-09-01 08:09:53,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:09:53,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814049398] [2023-09-01 08:09:53,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:53,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:09:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:09:53,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:09:53,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814049398] [2023-09-01 08:09:53,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814049398] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:09:53,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021328] [2023-09-01 08:09:53,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:53,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:09:53,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:09:53,909 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:09:53,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 08:09:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:54,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:09:54,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:09:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 08:09:54,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:09:54,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021328] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:09:54,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:09:54,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-09-01 08:09:54,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206599384] [2023-09-01 08:09:54,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:09:54,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:09:54,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:09:54,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:09:54,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 08:09:54,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 470 [2023-09-01 08:09:54,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 112 transitions, 847 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:54,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:09:54,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 470 [2023-09-01 08:09:54,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:09:56,775 INFO L130 PetriNetUnfolder]: 19549/28181 cut-off events. [2023-09-01 08:09:56,776 INFO L131 PetriNetUnfolder]: For 79467/79555 co-relation queries the response was YES. [2023-09-01 08:09:56,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128422 conditions, 28181 events. 19549/28181 cut-off events. For 79467/79555 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 181273 event pairs, 9952 based on Foata normal form. 1320/20425 useless extension candidates. Maximal degree in co-relation 128387. Up to 27757 conditions per place. [2023-09-01 08:09:56,986 INFO L137 encePairwiseOnDemand]: 467/470 looper letters, 103 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2023-09-01 08:09:56,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 108 transitions, 1025 flow [2023-09-01 08:09:56,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:09:56,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:09:56,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 635 transitions. [2023-09-01 08:09:56,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450354609929078 [2023-09-01 08:09:56,988 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 635 transitions. [2023-09-01 08:09:56,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 635 transitions. [2023-09-01 08:09:56,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:09:56,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 635 transitions. [2023-09-01 08:09:56,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:56,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:56,992 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:56,992 INFO L175 Difference]: Start difference. First operand has 98 places, 112 transitions, 847 flow. Second operand 3 states and 635 transitions. [2023-09-01 08:09:56,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 108 transitions, 1025 flow [2023-09-01 08:09:57,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 108 transitions, 979 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-09-01 08:09:57,063 INFO L231 Difference]: Finished difference. Result has 95 places, 108 transitions, 773 flow [2023-09-01 08:09:57,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=773, PETRI_PLACES=95, PETRI_TRANSITIONS=108} [2023-09-01 08:09:57,064 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2023-09-01 08:09:57,064 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 108 transitions, 773 flow [2023-09-01 08:09:57,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:57,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:09:57,065 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:09:57,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 08:09:57,274 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 [2023-09-01 08:09:57,274 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:09:57,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:09:57,275 INFO L85 PathProgramCache]: Analyzing trace with hash -111879884, now seen corresponding path program 1 times [2023-09-01 08:09:57,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:09:57,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275279331] [2023-09-01 08:09:57,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:57,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:09:57,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:09:57,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:09:57,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275279331] [2023-09-01 08:09:57,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275279331] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:09:57,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596034178] [2023-09-01 08:09:57,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:09:57,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:09:57,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:09:57,917 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:09:57,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 08:09:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:09:58,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 08:09:58,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:09:58,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:09:58,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:09:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 08:09:58,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:09:58,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596034178] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:09:58,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:09:58,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-09-01 08:09:58,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837230252] [2023-09-01 08:09:58,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:09:58,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:09:58,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:09:58,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:09:58,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-09-01 08:09:58,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 470 [2023-09-01 08:09:58,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 108 transitions, 773 flow. Second operand has 7 states, 7 states have (on average 183.71428571428572) internal successors, (1286), 7 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:58,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:09:58,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 470 [2023-09-01 08:09:58,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:10:01,884 INFO L130 PetriNetUnfolder]: 23921/34705 cut-off events. [2023-09-01 08:10:01,884 INFO L131 PetriNetUnfolder]: For 91001/91109 co-relation queries the response was YES. [2023-09-01 08:10:02,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155500 conditions, 34705 events. 23921/34705 cut-off events. For 91001/91109 co-relation queries the response was YES. Maximal size of possible extension queue 2277. Compared 235368 event pairs, 4120 based on Foata normal form. 804/24445 useless extension candidates. Maximal degree in co-relation 155464. Up to 22273 conditions per place. [2023-09-01 08:10:02,168 INFO L137 encePairwiseOnDemand]: 461/470 looper letters, 123 selfloop transitions, 24 changer transitions 0/149 dead transitions. [2023-09-01 08:10:02,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 149 transitions, 1360 flow [2023-09-01 08:10:02,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 08:10:02,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 08:10:02,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1163 transitions. [2023-09-01 08:10:02,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4124113475177305 [2023-09-01 08:10:02,170 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1163 transitions. [2023-09-01 08:10:02,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1163 transitions. [2023-09-01 08:10:02,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:10:02,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1163 transitions. [2023-09-01 08:10:02,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 193.83333333333334) internal successors, (1163), 6 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:02,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:02,175 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:02,175 INFO L175 Difference]: Start difference. First operand has 95 places, 108 transitions, 773 flow. Second operand 6 states and 1163 transitions. [2023-09-01 08:10:02,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 149 transitions, 1360 flow [2023-09-01 08:10:02,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 149 transitions, 1359 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:10:02,347 INFO L231 Difference]: Finished difference. Result has 102 places, 111 transitions, 907 flow [2023-09-01 08:10:02,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=907, PETRI_PLACES=102, PETRI_TRANSITIONS=111} [2023-09-01 08:10:02,348 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 45 predicate places. [2023-09-01 08:10:02,348 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 111 transitions, 907 flow [2023-09-01 08:10:02,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 183.71428571428572) internal successors, (1286), 7 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:02,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:10:02,349 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:10:02,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 08:10:02,556 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 [2023-09-01 08:10:02,557 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:10:02,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:10:02,558 INFO L85 PathProgramCache]: Analyzing trace with hash -111879798, now seen corresponding path program 1 times [2023-09-01 08:10:02,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:10:02,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948120509] [2023-09-01 08:10:02,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:10:02,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:10:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:10:02,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 08:10:02,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:10:02,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948120509] [2023-09-01 08:10:02,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948120509] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:10:02,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:10:02,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:10:02,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320012096] [2023-09-01 08:10:02,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:10:02,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:10:02,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:10:02,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:10:02,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:10:02,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 470 [2023-09-01 08:10:02,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 111 transitions, 907 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:02,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:10:02,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 470 [2023-09-01 08:10:02,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:10:05,642 INFO L130 PetriNetUnfolder]: 19661/28789 cut-off events. [2023-09-01 08:10:05,642 INFO L131 PetriNetUnfolder]: For 115421/115509 co-relation queries the response was YES. [2023-09-01 08:10:05,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136116 conditions, 28789 events. 19661/28789 cut-off events. For 115421/115509 co-relation queries the response was YES. Maximal size of possible extension queue 1834. Compared 192580 event pairs, 9704 based on Foata normal form. 88/20785 useless extension candidates. Maximal degree in co-relation 136076. Up to 24209 conditions per place. [2023-09-01 08:10:05,851 INFO L137 encePairwiseOnDemand]: 467/470 looper letters, 109 selfloop transitions, 8 changer transitions 0/121 dead transitions. [2023-09-01 08:10:05,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 121 transitions, 1189 flow [2023-09-01 08:10:05,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:10:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:10:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2023-09-01 08:10:05,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45673758865248226 [2023-09-01 08:10:05,854 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2023-09-01 08:10:05,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2023-09-01 08:10:05,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:10:05,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2023-09-01 08:10:05,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:05,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:05,857 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:05,857 INFO L175 Difference]: Start difference. First operand has 102 places, 111 transitions, 907 flow. Second operand 3 states and 644 transitions. [2023-09-01 08:10:05,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 121 transitions, 1189 flow [2023-09-01 08:10:06,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 121 transitions, 1163 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-09-01 08:10:06,035 INFO L231 Difference]: Finished difference. Result has 101 places, 106 transitions, 849 flow [2023-09-01 08:10:06,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=849, PETRI_PLACES=101, PETRI_TRANSITIONS=106} [2023-09-01 08:10:06,036 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 44 predicate places. [2023-09-01 08:10:06,036 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 106 transitions, 849 flow [2023-09-01 08:10:06,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:06,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:10:06,036 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:10:06,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-09-01 08:10:06,037 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:10:06,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:10:06,037 INFO L85 PathProgramCache]: Analyzing trace with hash -111879698, now seen corresponding path program 1 times [2023-09-01 08:10:06,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:10:06,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075361200] [2023-09-01 08:10:06,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:10:06,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:10:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:10:06,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:10:06,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:10:06,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075361200] [2023-09-01 08:10:06,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075361200] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:10:06,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775454349] [2023-09-01 08:10:06,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:10:06,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:10:06,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:10:06,959 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:10:06,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 08:10:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:10:07,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 08:10:07,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:10:07,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:10:07,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:10:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 08:10:07,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:10:07,352 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:10:07,353 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 46 treesize of output 38 [2023-09-01 08:10:07,366 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 11 treesize of output 5 [2023-09-01 08:10:07,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 08:10:07,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775454349] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 08:10:07,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 08:10:07,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 6] total 19 [2023-09-01 08:10:07,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236950280] [2023-09-01 08:10:07,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:10:07,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:10:07,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:10:07,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:10:07,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=357, Unknown=4, NotChecked=0, Total=420 [2023-09-01 08:10:09,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:10:09,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 470 [2023-09-01 08:10:09,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 106 transitions, 849 flow. Second operand has 7 states, 7 states have (on average 167.71428571428572) internal successors, (1174), 7 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:09,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:10:09,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 470 [2023-09-01 08:10:09,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:10:12,662 INFO L130 PetriNetUnfolder]: 18677/27505 cut-off events. [2023-09-01 08:10:12,663 INFO L131 PetriNetUnfolder]: For 109013/109121 co-relation queries the response was YES. [2023-09-01 08:10:12,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131360 conditions, 27505 events. 18677/27505 cut-off events. For 109013/109121 co-relation queries the response was YES. Maximal size of possible extension queue 1649. Compared 182879 event pairs, 4456 based on Foata normal form. 364/20853 useless extension candidates. Maximal degree in co-relation 131320. Up to 19129 conditions per place. [2023-09-01 08:10:12,876 INFO L137 encePairwiseOnDemand]: 460/470 looper letters, 109 selfloop transitions, 48 changer transitions 0/159 dead transitions. [2023-09-01 08:10:12,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 159 transitions, 1564 flow [2023-09-01 08:10:12,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 08:10:12,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 08:10:12,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1234 transitions. [2023-09-01 08:10:12,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3750759878419453 [2023-09-01 08:10:12,879 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1234 transitions. [2023-09-01 08:10:12,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1234 transitions. [2023-09-01 08:10:12,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:10:12,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1234 transitions. [2023-09-01 08:10:12,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 176.28571428571428) internal successors, (1234), 7 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:12,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:12,885 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 470.0) internal successors, (3760), 8 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:12,885 INFO L175 Difference]: Start difference. First operand has 101 places, 106 transitions, 849 flow. Second operand 7 states and 1234 transitions. [2023-09-01 08:10:12,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 159 transitions, 1564 flow [2023-09-01 08:10:13,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 159 transitions, 1546 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 08:10:13,248 INFO L231 Difference]: Finished difference. Result has 109 places, 120 transitions, 1167 flow [2023-09-01 08:10:13,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1167, PETRI_PLACES=109, PETRI_TRANSITIONS=120} [2023-09-01 08:10:13,248 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 52 predicate places. [2023-09-01 08:10:13,248 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 120 transitions, 1167 flow [2023-09-01 08:10:13,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 167.71428571428572) internal successors, (1174), 7 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:13,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:10:13,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:10:13,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-09-01 08:10:13,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:10:13,450 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:10:13,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:10:13,451 INFO L85 PathProgramCache]: Analyzing trace with hash -289923211, now seen corresponding path program 1 times [2023-09-01 08:10:13,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:10:13,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832269933] [2023-09-01 08:10:13,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:10:13,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:10:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:10:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:10:13,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:10:13,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832269933] [2023-09-01 08:10:13,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832269933] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:10:13,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284428216] [2023-09-01 08:10:13,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:10:13,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:10:13,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:10:13,737 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:10:13,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 08:10:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:10:13,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 08:10:13,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:10:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:10:13,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:10:14,008 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 08:10:14,010 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 26 treesize of output 13 [2023-09-01 08:10:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:10:14,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284428216] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:10:14,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:10:14,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-09-01 08:10:14,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807942655] [2023-09-01 08:10:14,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:10:14,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 08:10:14,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:10:14,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 08:10:14,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-09-01 08:10:14,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 470 [2023-09-01 08:10:14,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 120 transitions, 1167 flow. Second operand has 16 states, 16 states have (on average 174.25) internal successors, (2788), 16 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:14,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:10:14,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 470 [2023-09-01 08:10:14,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:10:18,128 INFO L130 PetriNetUnfolder]: 19397/28585 cut-off events. [2023-09-01 08:10:18,129 INFO L131 PetriNetUnfolder]: For 130021/130129 co-relation queries the response was YES. [2023-09-01 08:10:18,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142696 conditions, 28585 events. 19397/28585 cut-off events. For 130021/130129 co-relation queries the response was YES. Maximal size of possible extension queue 1717. Compared 195283 event pairs, 1428 based on Foata normal form. 200/21613 useless extension candidates. Maximal degree in co-relation 142652. Up to 14121 conditions per place. [2023-09-01 08:10:18,336 INFO L137 encePairwiseOnDemand]: 457/470 looper letters, 187 selfloop transitions, 65 changer transitions 0/254 dead transitions. [2023-09-01 08:10:18,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 254 transitions, 2516 flow [2023-09-01 08:10:18,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 08:10:18,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 08:10:18,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2750 transitions. [2023-09-01 08:10:18,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3900709219858156 [2023-09-01 08:10:18,343 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2750 transitions. [2023-09-01 08:10:18,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2750 transitions. [2023-09-01 08:10:18,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:10:18,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2750 transitions. [2023-09-01 08:10:18,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 183.33333333333334) internal successors, (2750), 15 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:18,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 470.0) internal successors, (7520), 16 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:18,354 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 470.0) internal successors, (7520), 16 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:18,354 INFO L175 Difference]: Start difference. First operand has 109 places, 120 transitions, 1167 flow. Second operand 15 states and 2750 transitions. [2023-09-01 08:10:18,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 254 transitions, 2516 flow [2023-09-01 08:10:18,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 254 transitions, 2479 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-09-01 08:10:18,928 INFO L231 Difference]: Finished difference. Result has 125 places, 133 transitions, 1513 flow [2023-09-01 08:10:18,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1513, PETRI_PLACES=125, PETRI_TRANSITIONS=133} [2023-09-01 08:10:18,929 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 68 predicate places. [2023-09-01 08:10:18,929 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 133 transitions, 1513 flow [2023-09-01 08:10:18,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 174.25) internal successors, (2788), 16 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:18,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:10:18,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:10:18,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 08:10:19,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:10:19,136 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:10:19,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:10:19,136 INFO L85 PathProgramCache]: Analyzing trace with hash 672794765, now seen corresponding path program 2 times [2023-09-01 08:10:19,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:10:19,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554872360] [2023-09-01 08:10:19,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:10:19,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:10:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:10:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:10:19,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:10:19,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554872360] [2023-09-01 08:10:19,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554872360] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:10:19,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316665141] [2023-09-01 08:10:19,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:10:19,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:10:19,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:10:19,543 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:10:19,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 08:10:19,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:10:19,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:10:19,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 08:10:19,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:10:19,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:10:19,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:10:19,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 08:10:19,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:10:19,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316665141] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:10:19,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:10:19,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-09-01 08:10:19,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217795163] [2023-09-01 08:10:19,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:10:19,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:10:19,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:10:19,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:10:19,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-09-01 08:10:19,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 470 [2023-09-01 08:10:19,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 133 transitions, 1513 flow. Second operand has 7 states, 7 states have (on average 183.71428571428572) internal successors, (1286), 7 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:19,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:10:19,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 470 [2023-09-01 08:10:19,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:10:23,491 INFO L130 PetriNetUnfolder]: 19661/29073 cut-off events. [2023-09-01 08:10:23,492 INFO L131 PetriNetUnfolder]: For 189109/189217 co-relation queries the response was YES. [2023-09-01 08:10:23,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156768 conditions, 29073 events. 19661/29073 cut-off events. For 189109/189217 co-relation queries the response was YES. Maximal size of possible extension queue 1668. Compared 197517 event pairs, 5080 based on Foata normal form. 180/22561 useless extension candidates. Maximal degree in co-relation 156719. Up to 17565 conditions per place. [2023-09-01 08:10:23,717 INFO L137 encePairwiseOnDemand]: 461/470 looper letters, 120 selfloop transitions, 46 changer transitions 0/168 dead transitions. [2023-09-01 08:10:23,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 168 transitions, 2084 flow [2023-09-01 08:10:23,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 08:10:23,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 08:10:23,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1165 transitions. [2023-09-01 08:10:23,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41312056737588654 [2023-09-01 08:10:23,719 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1165 transitions. [2023-09-01 08:10:23,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1165 transitions. [2023-09-01 08:10:23,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:10:23,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1165 transitions. [2023-09-01 08:10:23,721 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) [2023-09-01 08:10:23,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:23,723 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:23,723 INFO L175 Difference]: Start difference. First operand has 125 places, 133 transitions, 1513 flow. Second operand 6 states and 1165 transitions. [2023-09-01 08:10:23,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 168 transitions, 2084 flow [2023-09-01 08:10:24,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 168 transitions, 1976 flow, removed 22 selfloop flow, removed 7 redundant places. [2023-09-01 08:10:24,605 INFO L231 Difference]: Finished difference. Result has 125 places, 134 transitions, 1611 flow [2023-09-01 08:10:24,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1611, PETRI_PLACES=125, PETRI_TRANSITIONS=134} [2023-09-01 08:10:24,606 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 68 predicate places. [2023-09-01 08:10:24,606 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 134 transitions, 1611 flow [2023-09-01 08:10:24,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 183.71428571428572) internal successors, (1286), 7 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:24,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:10:24,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:10:24,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 08:10:24,807 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,SelfDestructingSolverStorable20 [2023-09-01 08:10:24,807 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:10:24,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:10:24,808 INFO L85 PathProgramCache]: Analyzing trace with hash 872022787, now seen corresponding path program 1 times [2023-09-01 08:10:24,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:10:24,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364889100] [2023-09-01 08:10:24,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:10:24,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:10:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:10:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:10:25,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:10:25,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364889100] [2023-09-01 08:10:25,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364889100] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:10:25,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010211206] [2023-09-01 08:10:25,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:10:25,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:10:25,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:10:25,181 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:10:25,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 08:10:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:10:25,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 31 conjunts are in the unsatisfiable core [2023-09-01 08:10:25,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:10:25,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:10:25,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:10:25,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:10:25,342 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 08:10:25,343 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 [2023-09-01 08:10:25,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 08:10:25,474 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 08:10:25,474 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 [2023-09-01 08:10:25,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:10:25,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:10:25,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:10:25,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:10:25,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:10:25,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:10:25,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:10:25,845 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 08:10:25,846 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 23 treesize of output 10 [2023-09-01 08:10:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:10:25,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:10:26,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:10:26,252 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 35 treesize of output 36 [2023-09-01 08:10:26,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:10:26,270 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 4897 treesize of output 4769 [2023-09-01 08:10:26,330 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 288 treesize of output 276 [2023-09-01 08:10:26,343 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 140 treesize of output 134 [2023-09-01 08:10:26,353 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 270 treesize of output 246 [2023-09-01 08:10:26,362 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 246 treesize of output 198 [2023-09-01 08:10:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:10:26,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010211206] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:10:26,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:10:26,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2023-09-01 08:10:26,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725994893] [2023-09-01 08:10:26,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:10:26,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 08:10:26,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:10:26,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 08:10:26,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=556, Unknown=7, NotChecked=0, Total=650 [2023-09-01 08:10:27,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 470 [2023-09-01 08:10:27,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 134 transitions, 1611 flow. Second operand has 26 states, 26 states have (on average 139.5) internal successors, (3627), 26 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:27,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:10:27,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 470 [2023-09-01 08:10:27,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:10:29,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:10:40,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:10:41,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:10:45,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:10:47,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:10:49,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:10:51,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:10:55,521 INFO L130 PetriNetUnfolder]: 22373/33594 cut-off events. [2023-09-01 08:10:55,521 INFO L131 PetriNetUnfolder]: For 260425/260545 co-relation queries the response was YES. [2023-09-01 08:10:55,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187851 conditions, 33594 events. 22373/33594 cut-off events. For 260425/260545 co-relation queries the response was YES. Maximal size of possible extension queue 1861. Compared 241932 event pairs, 3440 based on Foata normal form. 376/26878 useless extension candidates. Maximal degree in co-relation 187802. Up to 16153 conditions per place. [2023-09-01 08:10:55,821 INFO L137 encePairwiseOnDemand]: 455/470 looper letters, 253 selfloop transitions, 107 changer transitions 0/362 dead transitions. [2023-09-01 08:10:55,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 362 transitions, 4017 flow [2023-09-01 08:10:55,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 08:10:55,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 08:10:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4252 transitions. [2023-09-01 08:10:55,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3119589141599413 [2023-09-01 08:10:55,825 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4252 transitions. [2023-09-01 08:10:55,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4252 transitions. [2023-09-01 08:10:55,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:10:55,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4252 transitions. [2023-09-01 08:10:55,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 146.6206896551724) internal successors, (4252), 29 states have internal predecessors, (4252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:55,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 470.0) internal successors, (14100), 30 states have internal predecessors, (14100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:55,837 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 470.0) internal successors, (14100), 30 states have internal predecessors, (14100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:55,837 INFO L175 Difference]: Start difference. First operand has 125 places, 134 transitions, 1611 flow. Second operand 29 states and 4252 transitions. [2023-09-01 08:10:55,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 362 transitions, 4017 flow [2023-09-01 08:10:56,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 362 transitions, 3915 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-09-01 08:10:56,742 INFO L231 Difference]: Finished difference. Result has 162 places, 193 transitions, 2747 flow [2023-09-01 08:10:56,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=1536, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2747, PETRI_PLACES=162, PETRI_TRANSITIONS=193} [2023-09-01 08:10:56,743 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 105 predicate places. [2023-09-01 08:10:56,743 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 193 transitions, 2747 flow [2023-09-01 08:10:56,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 139.5) internal successors, (3627), 26 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:56,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:10:56,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:10:56,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 08:10:56,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:10:56,956 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:10:56,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:10:56,957 INFO L85 PathProgramCache]: Analyzing trace with hash -618093243, now seen corresponding path program 1 times [2023-09-01 08:10:56,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:10:56,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538153036] [2023-09-01 08:10:56,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:10:56,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:10:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:10:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:10:57,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:10:57,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538153036] [2023-09-01 08:10:57,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538153036] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:10:57,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622616407] [2023-09-01 08:10:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:10:57,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:10:57,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:10:57,493 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:10:57,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 08:10:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:10:57,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 08:10:57,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:10:57,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:10:57,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 08:10:57,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:10:57,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 08:10:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:10:57,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:10:58,007 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_880 (Array Int Int))) (< 0 (+ 2147483648 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_880) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))) is different from false [2023-09-01 08:10:58,076 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:10:58,076 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 174 treesize of output 158 [2023-09-01 08:10:58,085 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 32 treesize of output 20 [2023-09-01 08:10:58,094 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 31 treesize of output 25 [2023-09-01 08:10:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:10:58,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622616407] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:10:58,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:10:58,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-09-01 08:10:58,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587713886] [2023-09-01 08:10:58,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:10:58,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 08:10:58,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:10:58,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 08:10:58,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=344, Unknown=3, NotChecked=38, Total=462 [2023-09-01 08:10:58,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 470 [2023-09-01 08:10:58,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 193 transitions, 2747 flow. Second operand has 22 states, 22 states have (on average 145.77272727272728) internal successors, (3207), 22 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:10:58,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:10:58,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 470 [2023-09-01 08:10:58,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:11:06,685 INFO L130 PetriNetUnfolder]: 23537/35878 cut-off events. [2023-09-01 08:11:06,686 INFO L131 PetriNetUnfolder]: For 442844/442964 co-relation queries the response was YES. [2023-09-01 08:11:06,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225358 conditions, 35878 events. 23537/35878 cut-off events. For 442844/442964 co-relation queries the response was YES. Maximal size of possible extension queue 1980. Compared 265371 event pairs, 3488 based on Foata normal form. 508/29906 useless extension candidates. Maximal degree in co-relation 225296. Up to 15793 conditions per place. [2023-09-01 08:11:07,122 INFO L137 encePairwiseOnDemand]: 457/470 looper letters, 225 selfloop transitions, 119 changer transitions 0/346 dead transitions. [2023-09-01 08:11:07,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 346 transitions, 4689 flow [2023-09-01 08:11:07,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 08:11:07,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 08:11:07,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3070 transitions. [2023-09-01 08:11:07,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32659574468085106 [2023-09-01 08:11:07,125 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3070 transitions. [2023-09-01 08:11:07,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3070 transitions. [2023-09-01 08:11:07,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:11:07,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3070 transitions. [2023-09-01 08:11:07,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 153.5) internal successors, (3070), 20 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:11:07,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 470.0) internal successors, (9870), 21 states have internal predecessors, (9870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:11:07,133 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 470.0) internal successors, (9870), 21 states have internal predecessors, (9870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:11:07,133 INFO L175 Difference]: Start difference. First operand has 162 places, 193 transitions, 2747 flow. Second operand 20 states and 3070 transitions. [2023-09-01 08:11:07,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 346 transitions, 4689 flow [2023-09-01 08:11:09,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 346 transitions, 4418 flow, removed 120 selfloop flow, removed 7 redundant places. [2023-09-01 08:11:09,248 INFO L231 Difference]: Finished difference. Result has 180 places, 214 transitions, 3306 flow [2023-09-01 08:11:09,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=2542, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3306, PETRI_PLACES=180, PETRI_TRANSITIONS=214} [2023-09-01 08:11:09,248 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 123 predicate places. [2023-09-01 08:11:09,248 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 214 transitions, 3306 flow [2023-09-01 08:11:09,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 145.77272727272728) internal successors, (3207), 22 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:11:09,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:11:09,249 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:11:09,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 08:11:09,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:11:09,450 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:11:09,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:11:09,450 INFO L85 PathProgramCache]: Analyzing trace with hash 826796600, now seen corresponding path program 1 times [2023-09-01 08:11:09,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:11:09,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003996202] [2023-09-01 08:11:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:11:09,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:11:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:11:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:11:10,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:11:10,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003996202] [2023-09-01 08:11:10,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003996202] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:11:10,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058369579] [2023-09-01 08:11:10,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:11:10,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:11:10,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:11:10,676 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:11:10,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 08:11:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:11:10,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 08:11:10,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:11:10,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:11:10,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:11:11,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:11:11,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:11:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 08:11:11,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:11:11,228 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_937 (Array Int Int)) (v_ArrVal_938 (Array Int Int))) (< (+ c_~s~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_937) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_938) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)) is different from false [2023-09-01 08:11:11,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:11:11,245 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 88 treesize of output 80 [2023-09-01 08:11:11,252 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 68 treesize of output 56 [2023-09-01 08:11:11,258 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 30 treesize of output 24 [2023-09-01 08:11:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 08:11:11,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058369579] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 08:11:11,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 08:11:11,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 7] total 23 [2023-09-01 08:11:11,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692359848] [2023-09-01 08:11:11,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:11:11,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 08:11:11,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:11:11,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 08:11:11,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=4, NotChecked=44, Total=600 [2023-09-01 08:11:11,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 470 [2023-09-01 08:11:11,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 214 transitions, 3306 flow. Second operand has 8 states, 8 states have (on average 164.625) internal successors, (1317), 8 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:11:11,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:11:11,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 470 [2023-09-01 08:11:11,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:11:13,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:11:15,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:11:22,006 INFO L130 PetriNetUnfolder]: 26889/41194 cut-off events. [2023-09-01 08:11:22,006 INFO L131 PetriNetUnfolder]: For 634768/634876 co-relation queries the response was YES. [2023-09-01 08:11:22,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288512 conditions, 41194 events. 26889/41194 cut-off events. For 634768/634876 co-relation queries the response was YES. Maximal size of possible extension queue 2136. Compared 311151 event pairs, 4432 based on Foata normal form. 672/35470 useless extension candidates. Maximal degree in co-relation 288445. Up to 23277 conditions per place. [2023-09-01 08:11:22,639 INFO L137 encePairwiseOnDemand]: 456/470 looper letters, 194 selfloop transitions, 113 changer transitions 0/309 dead transitions. [2023-09-01 08:11:22,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 309 transitions, 5211 flow [2023-09-01 08:11:22,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 08:11:22,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 08:11:22,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1388 transitions. [2023-09-01 08:11:22,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36914893617021277 [2023-09-01 08:11:22,641 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1388 transitions. [2023-09-01 08:11:22,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1388 transitions. [2023-09-01 08:11:22,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:11:22,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1388 transitions. [2023-09-01 08:11:22,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 173.5) internal successors, (1388), 8 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:11:22,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 470.0) internal successors, (4230), 9 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:11:22,644 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 470.0) internal successors, (4230), 9 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:11:22,645 INFO L175 Difference]: Start difference. First operand has 180 places, 214 transitions, 3306 flow. Second operand 8 states and 1388 transitions. [2023-09-01 08:11:22,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 309 transitions, 5211 flow [2023-09-01 08:11:26,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 309 transitions, 5043 flow, removed 46 selfloop flow, removed 8 redundant places. [2023-09-01 08:11:26,224 INFO L231 Difference]: Finished difference. Result has 184 places, 256 transitions, 4440 flow [2023-09-01 08:11:26,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=3150, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4440, PETRI_PLACES=184, PETRI_TRANSITIONS=256} [2023-09-01 08:11:26,225 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 127 predicate places. [2023-09-01 08:11:26,225 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 256 transitions, 4440 flow [2023-09-01 08:11:26,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 164.625) internal successors, (1317), 8 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:11:26,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:11:26,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:11:26,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 08:11:26,426 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,SelfDestructingSolverStorable23 [2023-09-01 08:11:26,427 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:11:26,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:11:26,427 INFO L85 PathProgramCache]: Analyzing trace with hash -365188051, now seen corresponding path program 2 times [2023-09-01 08:11:26,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:11:26,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336842075] [2023-09-01 08:11:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:11:26,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:11:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:11:27,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:11:27,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:11:27,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336842075] [2023-09-01 08:11:27,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336842075] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:11:27,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230143196] [2023-09-01 08:11:27,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:11:27,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:11:27,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:11:27,228 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:11:27,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 08:11:27,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:11:27,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:11:27,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 08:11:27,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:11:27,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:11:27,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:11:27,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:11:27,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:11:27,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 08:11:27,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:11:27,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230143196] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:11:27,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:11:27,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 15 [2023-09-01 08:11:27,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257587256] [2023-09-01 08:11:27,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:11:27,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 08:11:27,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:11:27,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 08:11:27,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-09-01 08:11:27,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 470 [2023-09-01 08:11:27,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 256 transitions, 4440 flow. Second operand has 8 states, 8 states have (on average 181.625) internal successors, (1453), 8 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:11:27,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:11:27,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 470 [2023-09-01 08:11:27,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:11:34,319 INFO L130 PetriNetUnfolder]: 27501/42354 cut-off events. [2023-09-01 08:11:34,320 INFO L131 PetriNetUnfolder]: For 750849/750957 co-relation queries the response was YES. [2023-09-01 08:11:34,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301591 conditions, 42354 events. 27501/42354 cut-off events. For 750849/750957 co-relation queries the response was YES. Maximal size of possible extension queue 2264. Compared 325428 event pairs, 5828 based on Foata normal form. 1376/36218 useless extension candidates. Maximal degree in co-relation 301518. Up to 20584 conditions per place. [2023-09-01 08:11:34,854 INFO L137 encePairwiseOnDemand]: 462/470 looper letters, 221 selfloop transitions, 79 changer transitions 0/302 dead transitions. [2023-09-01 08:11:34,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 302 transitions, 5652 flow [2023-09-01 08:11:34,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 08:11:34,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 08:11:34,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1149 transitions. [2023-09-01 08:11:34,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074468085106383 [2023-09-01 08:11:34,856 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1149 transitions. [2023-09-01 08:11:34,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1149 transitions. [2023-09-01 08:11:34,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:11:34,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1149 transitions. [2023-09-01 08:11:34,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 191.5) internal successors, (1149), 6 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:11:34,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:11:34,858 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:11:34,859 INFO L175 Difference]: Start difference. First operand has 184 places, 256 transitions, 4440 flow. Second operand 6 states and 1149 transitions. [2023-09-01 08:11:34,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 302 transitions, 5652 flow [2023-09-01 08:11:39,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 302 transitions, 5514 flow, removed 31 selfloop flow, removed 4 redundant places. [2023-09-01 08:11:39,567 INFO L231 Difference]: Finished difference. Result has 188 places, 263 transitions, 4781 flow [2023-09-01 08:11:39,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=4223, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4781, PETRI_PLACES=188, PETRI_TRANSITIONS=263} [2023-09-01 08:11:39,568 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 131 predicate places. [2023-09-01 08:11:39,568 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 263 transitions, 4781 flow [2023-09-01 08:11:39,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 181.625) internal successors, (1453), 8 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:11:39,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:11:39,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:11:39,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 08:11:39,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:11:39,769 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:11:39,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:11:39,770 INFO L85 PathProgramCache]: Analyzing trace with hash -618093057, now seen corresponding path program 1 times [2023-09-01 08:11:39,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:11:39,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916831621] [2023-09-01 08:11:39,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:11:39,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:11:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:11:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:11:40,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:11:40,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916831621] [2023-09-01 08:11:40,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916831621] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:11:40,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598018458] [2023-09-01 08:11:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:11:40,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:11:40,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:11:40,556 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:11:40,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 08:11:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:11:40,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 08:11:40,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:11:40,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:11:40,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:11:40,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:11:40,769 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 08:11:40,770 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 [2023-09-01 08:11:40,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:11:40,941 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 08:11:40,944 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 [2023-09-01 08:11:41,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 08:11:41,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:11:41,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 08:11:41,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:11:41,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 08:11:41,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:11:41,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 08:11:41,326 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:11:41,329 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:11:41,329 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 17 treesize of output 10 [2023-09-01 08:11:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:11:41,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:11:41,422 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1054 (Array Int Int)) (v_ArrVal_1053 (Array Int Int))) (< (+ c_~s~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1053) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1054) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)) is different from false [2023-09-01 08:11:45,717 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:11:45,718 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 37 treesize of output 38 [2023-09-01 08:11:45,732 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:11:45,732 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 677 treesize of output 661 [2023-09-01 08:11:45,766 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 162 treesize of output 156 [2023-09-01 08:11:45,778 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 314 treesize of output 302 [2023-09-01 08:11:45,789 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 302 treesize of output 254 [2023-09-01 08:11:45,804 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 254 treesize of output 230 [2023-09-01 08:11:46,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:11:46,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598018458] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:11:46,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:11:46,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-09-01 08:11:46,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606047275] [2023-09-01 08:11:46,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:11:46,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 08:11:46,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:11:46,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 08:11:46,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=587, Unknown=9, NotChecked=50, Total=756 [2023-09-01 08:11:46,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 470 [2023-09-01 08:11:46,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 263 transitions, 4781 flow. Second operand has 28 states, 28 states have (on average 137.35714285714286) internal successors, (3846), 28 states have internal predecessors, (3846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:11:46,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:11:46,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 470 [2023-09-01 08:11:46,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:12:01,622 INFO L130 PetriNetUnfolder]: 27945/42882 cut-off events. [2023-09-01 08:12:01,622 INFO L131 PetriNetUnfolder]: For 801349/801457 co-relation queries the response was YES. [2023-09-01 08:12:02,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316493 conditions, 42882 events. 27945/42882 cut-off events. For 801349/801457 co-relation queries the response was YES. Maximal size of possible extension queue 2187. Compared 329157 event pairs, 11888 based on Foata normal form. 168/35526 useless extension candidates. Maximal degree in co-relation 316418. Up to 34960 conditions per place. [2023-09-01 08:12:02,423 INFO L137 encePairwiseOnDemand]: 455/470 looper letters, 278 selfloop transitions, 72 changer transitions 0/352 dead transitions. [2023-09-01 08:12:02,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 352 transitions, 6284 flow [2023-09-01 08:12:02,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 08:12:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 08:12:02,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2710 transitions. [2023-09-01 08:12:02,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.303471444568869 [2023-09-01 08:12:02,427 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2710 transitions. [2023-09-01 08:12:02,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2710 transitions. [2023-09-01 08:12:02,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:12:02,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2710 transitions. [2023-09-01 08:12:02,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 142.6315789473684) internal successors, (2710), 19 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:02,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 470.0) internal successors, (9400), 20 states have internal predecessors, (9400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:02,437 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 470.0) internal successors, (9400), 20 states have internal predecessors, (9400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:02,437 INFO L175 Difference]: Start difference. First operand has 188 places, 263 transitions, 4781 flow. Second operand 19 states and 2710 transitions. [2023-09-01 08:12:02,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 352 transitions, 6284 flow [2023-09-01 08:12:08,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 352 transitions, 6246 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-09-01 08:12:08,415 INFO L231 Difference]: Finished difference. Result has 209 places, 279 transitions, 5333 flow [2023-09-01 08:12:08,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=4728, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5333, PETRI_PLACES=209, PETRI_TRANSITIONS=279} [2023-09-01 08:12:08,415 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 152 predicate places. [2023-09-01 08:12:08,415 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 279 transitions, 5333 flow [2023-09-01 08:12:08,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 137.35714285714286) internal successors, (3846), 28 states have internal predecessors, (3846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:08,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:12:08,416 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:12:08,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 08:12:08,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:12:08,631 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:12:08,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:12:08,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1259864867, now seen corresponding path program 1 times [2023-09-01 08:12:08,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:12:08,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298177847] [2023-09-01 08:12:08,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:12:08,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:12:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:12:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:12:08,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:12:08,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298177847] [2023-09-01 08:12:08,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298177847] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:12:08,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002981473] [2023-09-01 08:12:08,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:12:08,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:12:08,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:12:08,749 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:12:08,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 08:12:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:12:08,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 08:12:08,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:12:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:12:08,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:12:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:12:09,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002981473] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:12:09,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:12:09,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-09-01 08:12:09,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943029019] [2023-09-01 08:12:09,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:12:09,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 08:12:09,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:12:09,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 08:12:09,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-09-01 08:12:09,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 470 [2023-09-01 08:12:09,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 279 transitions, 5333 flow. Second operand has 12 states, 12 states have (on average 188.08333333333334) internal successors, (2257), 12 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:09,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:12:09,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 470 [2023-09-01 08:12:09,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:12:16,124 INFO L130 PetriNetUnfolder]: 25278/39364 cut-off events. [2023-09-01 08:12:16,124 INFO L131 PetriNetUnfolder]: For 844088/844242 co-relation queries the response was YES. [2023-09-01 08:12:16,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294423 conditions, 39364 events. 25278/39364 cut-off events. For 844088/844242 co-relation queries the response was YES. Maximal size of possible extension queue 2194. Compared 304518 event pairs, 11481 based on Foata normal form. 988/33372 useless extension candidates. Maximal degree in co-relation 294342. Up to 30098 conditions per place. [2023-09-01 08:12:16,892 INFO L137 encePairwiseOnDemand]: 460/470 looper letters, 459 selfloop transitions, 68 changer transitions 0/533 dead transitions. [2023-09-01 08:12:16,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 533 transitions, 11348 flow [2023-09-01 08:12:16,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 08:12:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 08:12:16,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1752 transitions. [2023-09-01 08:12:16,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41418439716312055 [2023-09-01 08:12:16,899 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1752 transitions. [2023-09-01 08:12:16,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1752 transitions. [2023-09-01 08:12:16,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:12:16,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1752 transitions. [2023-09-01 08:12:16,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 194.66666666666666) internal successors, (1752), 9 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:16,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 470.0) internal successors, (4700), 10 states have internal predecessors, (4700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:16,904 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 470.0) internal successors, (4700), 10 states have internal predecessors, (4700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:16,905 INFO L175 Difference]: Start difference. First operand has 209 places, 279 transitions, 5333 flow. Second operand 9 states and 1752 transitions. [2023-09-01 08:12:16,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 533 transitions, 11348 flow [2023-09-01 08:12:23,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 533 transitions, 11214 flow, removed 36 selfloop flow, removed 8 redundant places. [2023-09-01 08:12:23,395 INFO L231 Difference]: Finished difference. Result has 212 places, 337 transitions, 7260 flow [2023-09-01 08:12:23,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=5260, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7260, PETRI_PLACES=212, PETRI_TRANSITIONS=337} [2023-09-01 08:12:23,396 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 155 predicate places. [2023-09-01 08:12:23,396 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 337 transitions, 7260 flow [2023-09-01 08:12:23,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 188.08333333333334) internal successors, (2257), 12 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:23,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:12:23,397 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:12:23,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 08:12:23,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:12:23,597 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:12:23,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:12:23,598 INFO L85 PathProgramCache]: Analyzing trace with hash 475891200, now seen corresponding path program 1 times [2023-09-01 08:12:23,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:12:23,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990841743] [2023-09-01 08:12:23,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:12:23,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:12:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:12:24,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:12:24,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:12:24,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990841743] [2023-09-01 08:12:24,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990841743] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:12:24,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601620933] [2023-09-01 08:12:24,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:12:24,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:12:24,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:12:24,580 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:12:24,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 08:12:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:12:24,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 08:12:24,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:12:24,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:12:24,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:12:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 08:12:24,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:12:24,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601620933] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:12:24,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:12:24,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 15 [2023-09-01 08:12:24,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007905897] [2023-09-01 08:12:24,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:12:24,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:12:24,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:12:24,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:12:24,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-09-01 08:12:24,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 470 [2023-09-01 08:12:24,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 337 transitions, 7260 flow. Second operand has 7 states, 7 states have (on average 182.85714285714286) internal successors, (1280), 7 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:24,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:12:24,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 470 [2023-09-01 08:12:24,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:12:32,417 INFO L130 PetriNetUnfolder]: 25752/39952 cut-off events. [2023-09-01 08:12:32,417 INFO L131 PetriNetUnfolder]: For 764921/765029 co-relation queries the response was YES. [2023-09-01 08:12:32,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304109 conditions, 39952 events. 25752/39952 cut-off events. For 764921/765029 co-relation queries the response was YES. Maximal size of possible extension queue 2053. Compared 308037 event pairs, 9284 based on Foata normal form. 260/33330 useless extension candidates. Maximal degree in co-relation 304024. Up to 29537 conditions per place. [2023-09-01 08:12:33,101 INFO L137 encePairwiseOnDemand]: 460/470 looper letters, 283 selfloop transitions, 74 changer transitions 0/359 dead transitions. [2023-09-01 08:12:33,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 359 transitions, 8073 flow [2023-09-01 08:12:33,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 08:12:33,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 08:12:33,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1151 transitions. [2023-09-01 08:12:33,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40815602836879433 [2023-09-01 08:12:33,104 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1151 transitions. [2023-09-01 08:12:33,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1151 transitions. [2023-09-01 08:12:33,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:12:33,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1151 transitions. [2023-09-01 08:12:33,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 191.83333333333334) internal successors, (1151), 6 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:33,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:33,108 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:33,108 INFO L175 Difference]: Start difference. First operand has 212 places, 337 transitions, 7260 flow. Second operand 6 states and 1151 transitions. [2023-09-01 08:12:33,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 359 transitions, 8073 flow [2023-09-01 08:12:41,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 359 transitions, 8050 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-09-01 08:12:41,754 INFO L231 Difference]: Finished difference. Result has 215 places, 334 transitions, 7424 flow [2023-09-01 08:12:41,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=7093, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7424, PETRI_PLACES=215, PETRI_TRANSITIONS=334} [2023-09-01 08:12:41,755 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 158 predicate places. [2023-09-01 08:12:41,755 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 334 transitions, 7424 flow [2023-09-01 08:12:41,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 182.85714285714286) internal successors, (1280), 7 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:41,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:12:41,756 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:12:41,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 08:12:41,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-09-01 08:12:41,961 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:12:41,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:12:41,962 INFO L85 PathProgramCache]: Analyzing trace with hash 573891224, now seen corresponding path program 2 times [2023-09-01 08:12:41,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:12:41,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470005704] [2023-09-01 08:12:41,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:12:41,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:12:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:12:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:12:42,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:12:42,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470005704] [2023-09-01 08:12:42,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470005704] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:12:42,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378876217] [2023-09-01 08:12:42,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:12:42,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:12:42,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:12:42,665 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:12:42,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 08:12:42,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:12:42,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:12:42,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 08:12:42,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:12:43,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:12:43,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:12:43,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:12:43,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:12:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 08:12:43,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:12:43,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378876217] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:12:43,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:12:43,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2023-09-01 08:12:43,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29687332] [2023-09-01 08:12:43,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:12:43,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 08:12:43,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:12:43,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 08:12:43,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-09-01 08:12:43,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 470 [2023-09-01 08:12:43,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 334 transitions, 7424 flow. Second operand has 8 states, 8 states have (on average 180.625) internal successors, (1445), 8 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:43,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:12:43,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 470 [2023-09-01 08:12:43,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:12:50,623 INFO L130 PetriNetUnfolder]: 24736/38558 cut-off events. [2023-09-01 08:12:50,623 INFO L131 PetriNetUnfolder]: For 866710/866818 co-relation queries the response was YES. [2023-09-01 08:12:51,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297978 conditions, 38558 events. 24736/38558 cut-off events. For 866710/866818 co-relation queries the response was YES. Maximal size of possible extension queue 1954. Compared 298296 event pairs, 9084 based on Foata normal form. 324/32348 useless extension candidates. Maximal degree in co-relation 297890. Up to 27681 conditions per place. [2023-09-01 08:12:51,231 INFO L137 encePairwiseOnDemand]: 461/470 looper letters, 294 selfloop transitions, 60 changer transitions 0/356 dead transitions. [2023-09-01 08:12:51,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 356 transitions, 8262 flow [2023-09-01 08:12:51,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 08:12:51,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 08:12:51,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1140 transitions. [2023-09-01 08:12:51,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40425531914893614 [2023-09-01 08:12:51,233 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1140 transitions. [2023-09-01 08:12:51,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1140 transitions. [2023-09-01 08:12:51,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:12:51,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1140 transitions. [2023-09-01 08:12:51,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 190.0) internal successors, (1140), 6 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:51,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:51,236 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:51,236 INFO L175 Difference]: Start difference. First operand has 215 places, 334 transitions, 7424 flow. Second operand 6 states and 1140 transitions. [2023-09-01 08:12:51,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 356 transitions, 8262 flow [2023-09-01 08:13:00,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 356 transitions, 8088 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-09-01 08:13:00,736 INFO L231 Difference]: Finished difference. Result has 218 places, 327 transitions, 7277 flow [2023-09-01 08:13:00,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=7037, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7277, PETRI_PLACES=218, PETRI_TRANSITIONS=327} [2023-09-01 08:13:00,737 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 161 predicate places. [2023-09-01 08:13:00,737 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 327 transitions, 7277 flow [2023-09-01 08:13:00,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 180.625) internal successors, (1445), 8 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:13:00,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:13:00,738 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:13:00,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 08:13:00,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 08:13:00,941 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:13:00,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:13:00,941 INFO L85 PathProgramCache]: Analyzing trace with hash -173641981, now seen corresponding path program 2 times [2023-09-01 08:13:00,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:13:00,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459865049] [2023-09-01 08:13:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:13:00,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:13:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:13:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 08:13:01,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:13:01,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459865049] [2023-09-01 08:13:01,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459865049] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:13:01,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091669800] [2023-09-01 08:13:01,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:13:01,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:13:01,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:13:01,049 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:13:01,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 08:13:01,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:13:01,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:13:01,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 08:13:01,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:13:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 08:13:01,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:13:01,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091669800] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:13:01,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:13:01,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-09-01 08:13:01,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299170159] [2023-09-01 08:13:01,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:13:01,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:13:01,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:13:01,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:13:01,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 08:13:01,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 470 [2023-09-01 08:13:01,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 327 transitions, 7277 flow. Second operand has 4 states, 4 states have (on average 201.25) internal successors, (805), 4 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:13:01,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:13:01,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 470 [2023-09-01 08:13:01,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:13:11,210 INFO L130 PetriNetUnfolder]: 34382/52451 cut-off events. [2023-09-01 08:13:11,211 INFO L131 PetriNetUnfolder]: For 1208086/1208238 co-relation queries the response was YES. [2023-09-01 08:13:11,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399892 conditions, 52451 events. 34382/52451 cut-off events. For 1208086/1208238 co-relation queries the response was YES. Maximal size of possible extension queue 2251. Compared 406632 event pairs, 9277 based on Foata normal form. 779/42213 useless extension candidates. Maximal degree in co-relation 399803. Up to 28558 conditions per place. [2023-09-01 08:13:12,099 INFO L137 encePairwiseOnDemand]: 466/470 looper letters, 349 selfloop transitions, 73 changer transitions 0/428 dead transitions. [2023-09-01 08:13:12,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 428 transitions, 10235 flow [2023-09-01 08:13:12,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:13:12,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:13:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 876 transitions. [2023-09-01 08:13:12,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46595744680851064 [2023-09-01 08:13:12,101 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 876 transitions. [2023-09-01 08:13:12,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 876 transitions. [2023-09-01 08:13:12,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:13:12,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 876 transitions. [2023-09-01 08:13:12,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:13:12,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 470.0) internal successors, (2350), 5 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:13:12,105 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 470.0) internal successors, (2350), 5 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:13:12,105 INFO L175 Difference]: Start difference. First operand has 218 places, 327 transitions, 7277 flow. Second operand 4 states and 876 transitions. [2023-09-01 08:13:12,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 428 transitions, 10235 flow [2023-09-01 08:13:25,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 428 transitions, 10040 flow, removed 35 selfloop flow, removed 7 redundant places. [2023-09-01 08:13:25,151 INFO L231 Difference]: Finished difference. Result has 215 places, 330 transitions, 7394 flow [2023-09-01 08:13:25,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=6673, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=7394, PETRI_PLACES=215, PETRI_TRANSITIONS=330} [2023-09-01 08:13:25,151 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 158 predicate places. [2023-09-01 08:13:25,151 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 330 transitions, 7394 flow [2023-09-01 08:13:25,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 201.25) internal successors, (805), 4 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:13:25,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:13:25,152 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:13:25,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 08:13:25,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:13:25,352 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:13:25,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:13:25,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1906475281, now seen corresponding path program 2 times [2023-09-01 08:13:25,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:13:25,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24540047] [2023-09-01 08:13:25,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:13:25,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:13:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:13:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:13:27,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:13:27,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24540047] [2023-09-01 08:13:27,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24540047] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:13:27,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754655108] [2023-09-01 08:13:27,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:13:27,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:13:27,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:13:27,321 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:13:27,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 08:13:27,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:13:27,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:13:27,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 08:13:27,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:13:27,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:13:27,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:13:27,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:13:27,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:13:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 08:13:27,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:13:27,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754655108] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:13:27,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:13:27,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 18 [2023-09-01 08:13:27,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180370725] [2023-09-01 08:13:27,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:13:27,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 08:13:27,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:13:27,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 08:13:27,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2023-09-01 08:13:28,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 470 [2023-09-01 08:13:28,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 330 transitions, 7394 flow. Second operand has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:13:28,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:13:28,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 470 [2023-09-01 08:13:28,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:13:38,191 INFO L130 PetriNetUnfolder]: 34778/52847 cut-off events. [2023-09-01 08:13:38,191 INFO L131 PetriNetUnfolder]: For 1238758/1238866 co-relation queries the response was YES. [2023-09-01 08:13:38,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419877 conditions, 52847 events. 34778/52847 cut-off events. For 1238758/1238866 co-relation queries the response was YES. Maximal size of possible extension queue 2208. Compared 402005 event pairs, 17129 based on Foata normal form. 148/42210 useless extension candidates. Maximal degree in co-relation 419789. Up to 48256 conditions per place. [2023-09-01 08:13:39,019 INFO L137 encePairwiseOnDemand]: 464/470 looper letters, 322 selfloop transitions, 34 changer transitions 0/358 dead transitions. [2023-09-01 08:13:39,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 358 transitions, 8271 flow [2023-09-01 08:13:39,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 08:13:39,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 08:13:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1131 transitions. [2023-09-01 08:13:39,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40106382978723404 [2023-09-01 08:13:39,021 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1131 transitions. [2023-09-01 08:13:39,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1131 transitions. [2023-09-01 08:13:39,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:13:39,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1131 transitions. [2023-09-01 08:13:39,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 188.5) internal successors, (1131), 6 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:13:39,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:13:39,024 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:13:39,024 INFO L175 Difference]: Start difference. First operand has 215 places, 330 transitions, 7394 flow. Second operand 6 states and 1131 transitions. [2023-09-01 08:13:39,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 358 transitions, 8271 flow [2023-09-01 08:13:56,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 358 transitions, 8193 flow, removed 39 selfloop flow, removed 0 redundant places. [2023-09-01 08:13:56,812 INFO L231 Difference]: Finished difference. Result has 221 places, 330 transitions, 7409 flow [2023-09-01 08:13:56,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=7316, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7409, PETRI_PLACES=221, PETRI_TRANSITIONS=330} [2023-09-01 08:13:56,813 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 164 predicate places. [2023-09-01 08:13:56,813 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 330 transitions, 7409 flow [2023-09-01 08:13:56,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:13:56,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:13:56,813 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:13:56,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-09-01 08:13:57,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:13:57,014 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:13:57,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:13:57,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1397371478, now seen corresponding path program 1 times [2023-09-01 08:13:57,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:13:57,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762666033] [2023-09-01 08:13:57,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:13:57,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:13:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:13:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:13:58,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:13:58,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762666033] [2023-09-01 08:13:58,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762666033] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:13:58,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471454290] [2023-09-01 08:13:58,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:13:58,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:13:58,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:13:58,101 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:13:58,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 08:13:58,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:13:58,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 08:13:58,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:13:58,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:13:58,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:13:58,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:13:58,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:13:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 08:13:58,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:13:58,649 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1397 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1397) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483648))) is different from false [2023-09-01 08:13:58,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:13:58,725 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 174 treesize of output 158 [2023-09-01 08:13:58,734 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 31 treesize of output 25 [2023-09-01 08:13:58,740 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 32 treesize of output 20 [2023-09-01 08:13:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 1 not checked. [2023-09-01 08:13:58,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471454290] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:13:58,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:13:58,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 6] total 25 [2023-09-01 08:13:58,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980243677] [2023-09-01 08:13:58,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:13:58,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 08:13:58,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:13:58,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 08:13:58,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=568, Unknown=5, NotChecked=48, Total=702 [2023-09-01 08:13:58,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 470 [2023-09-01 08:13:58,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 330 transitions, 7409 flow. Second operand has 27 states, 27 states have (on average 145.66666666666666) internal successors, (3933), 27 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:13:58,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:13:58,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 470 [2023-09-01 08:13:58,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:14:09,116 INFO L130 PetriNetUnfolder]: 33092/50908 cut-off events. [2023-09-01 08:14:09,116 INFO L131 PetriNetUnfolder]: For 1222029/1222137 co-relation queries the response was YES. [2023-09-01 08:14:09,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382262 conditions, 50908 events. 33092/50908 cut-off events. For 1222029/1222137 co-relation queries the response was YES. Maximal size of possible extension queue 2164. Compared 394948 event pairs, 3883 based on Foata normal form. 1468/42080 useless extension candidates. Maximal degree in co-relation 382171. Up to 21399 conditions per place. [2023-09-01 08:14:10,035 INFO L137 encePairwiseOnDemand]: 456/470 looper letters, 304 selfloop transitions, 122 changer transitions 0/428 dead transitions. [2023-09-01 08:14:10,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 428 transitions, 8502 flow [2023-09-01 08:14:10,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 08:14:10,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 08:14:10,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2732 transitions. [2023-09-01 08:14:10,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3229314420803783 [2023-09-01 08:14:10,039 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2732 transitions. [2023-09-01 08:14:10,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2732 transitions. [2023-09-01 08:14:10,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:14:10,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2732 transitions. [2023-09-01 08:14:10,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 151.77777777777777) internal successors, (2732), 18 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:14:10,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 470.0) internal successors, (8930), 19 states have internal predecessors, (8930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:14:10,048 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 470.0) internal successors, (8930), 19 states have internal predecessors, (8930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:14:10,049 INFO L175 Difference]: Start difference. First operand has 221 places, 330 transitions, 7409 flow. Second operand 18 states and 2732 transitions. [2023-09-01 08:14:10,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 428 transitions, 8502 flow [2023-09-01 08:14:18,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 428 transitions, 8378 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-09-01 08:14:18,872 INFO L231 Difference]: Finished difference. Result has 232 places, 312 transitions, 6744 flow [2023-09-01 08:14:18,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=6445, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6744, PETRI_PLACES=232, PETRI_TRANSITIONS=312} [2023-09-01 08:14:18,872 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 175 predicate places. [2023-09-01 08:14:18,873 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 312 transitions, 6744 flow [2023-09-01 08:14:18,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 145.66666666666666) internal successors, (3933), 27 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:14:18,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:14:18,873 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:14:18,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 08:14:19,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:14:19,074 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:14:19,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:14:19,075 INFO L85 PathProgramCache]: Analyzing trace with hash 312481557, now seen corresponding path program 1 times [2023-09-01 08:14:19,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:14:19,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275856758] [2023-09-01 08:14:19,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:14:19,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:14:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:14:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:14:19,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:14:19,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275856758] [2023-09-01 08:14:19,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275856758] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:14:19,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338690851] [2023-09-01 08:14:19,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:14:19,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:14:19,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:14:19,213 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:14:19,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 08:14:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:14:19,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 08:14:19,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:14:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:14:19,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:14:19,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:14:19,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338690851] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:14:19,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:14:19,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-09-01 08:14:19,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842339185] [2023-09-01 08:14:19,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:14:19,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 08:14:19,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:14:19,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 08:14:19,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-09-01 08:14:19,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 470 [2023-09-01 08:14:19,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 312 transitions, 6744 flow. Second operand has 18 states, 18 states have (on average 187.83333333333334) internal successors, (3381), 18 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:14:19,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:14:19,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 470 [2023-09-01 08:14:19,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:14:29,989 INFO L130 PetriNetUnfolder]: 36169/55843 cut-off events. [2023-09-01 08:14:29,989 INFO L131 PetriNetUnfolder]: For 1283897/1284137 co-relation queries the response was YES. [2023-09-01 08:14:30,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419919 conditions, 55843 events. 36169/55843 cut-off events. For 1283897/1284137 co-relation queries the response was YES. Maximal size of possible extension queue 2472. Compared 441194 event pairs, 19342 based on Foata normal form. 2068/44981 useless extension candidates. Maximal degree in co-relation 419830. Up to 41878 conditions per place. [2023-09-01 08:14:30,872 INFO L137 encePairwiseOnDemand]: 464/470 looper letters, 371 selfloop transitions, 29 changer transitions 0/406 dead transitions. [2023-09-01 08:14:30,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 406 transitions, 9065 flow [2023-09-01 08:14:30,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 08:14:30,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 08:14:30,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1771 transitions. [2023-09-01 08:14:30,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186761229314421 [2023-09-01 08:14:30,875 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1771 transitions. [2023-09-01 08:14:30,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1771 transitions. [2023-09-01 08:14:30,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:14:30,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1771 transitions. [2023-09-01 08:14:31,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 196.77777777777777) internal successors, (1771), 9 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:14:31,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 470.0) internal successors, (4700), 10 states have internal predecessors, (4700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:14:31,042 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 470.0) internal successors, (4700), 10 states have internal predecessors, (4700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:14:31,042 INFO L175 Difference]: Start difference. First operand has 232 places, 312 transitions, 6744 flow. Second operand 9 states and 1771 transitions. [2023-09-01 08:14:31,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 406 transitions, 9065 flow [2023-09-01 08:14:41,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 406 transitions, 8703 flow, removed 29 selfloop flow, removed 13 redundant places. [2023-09-01 08:14:41,082 INFO L231 Difference]: Finished difference. Result has 231 places, 301 transitions, 6290 flow [2023-09-01 08:14:41,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=6007, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6290, PETRI_PLACES=231, PETRI_TRANSITIONS=301} [2023-09-01 08:14:41,082 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 174 predicate places. [2023-09-01 08:14:41,082 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 301 transitions, 6290 flow [2023-09-01 08:14:41,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.83333333333334) internal successors, (3381), 18 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:14:41,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:14:41,083 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:14:41,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-09-01 08:14:41,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-09-01 08:14:41,284 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:14:41,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:14:41,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1375385924, now seen corresponding path program 2 times [2023-09-01 08:14:41,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:14:41,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508644550] [2023-09-01 08:14:41,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:14:41,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:14:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:14:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:14:42,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:14:42,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508644550] [2023-09-01 08:14:42,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508644550] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:14:42,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360704016] [2023-09-01 08:14:42,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:14:42,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:14:42,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:14:42,098 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:14:42,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 08:14:42,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:14:42,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:14:42,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 08:14:42,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:14:42,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:14:42,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:14:42,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:14:42,307 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 08:14:42,308 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 [2023-09-01 08:14:42,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 08:14:42,500 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-09-01 08:14:42,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 27 treesize of output 30 [2023-09-01 08:14:42,607 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 08:14:42,608 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 [2023-09-01 08:14:42,696 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 31 treesize of output 33 [2023-09-01 08:14:42,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:14:42,781 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 31 treesize of output 33 [2023-09-01 08:14:43,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:14:43,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:14:43,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:14:43,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:14:43,396 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 08:14:43,396 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 23 treesize of output 10 [2023-09-01 08:14:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:14:43,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:14:43,565 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1521 (Array Int Int)) (v_ArrVal_1520 (Array Int Int))) (< (+ c_~s~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1520) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1521) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)) is different from false [2023-09-01 08:14:44,158 INFO L321 Elim1Store]: treesize reduction 16, result has 65.2 percent of original size [2023-09-01 08:14:44,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 55 [2023-09-01 08:14:44,172 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:14:44,172 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 1359 treesize of output 1327 [2023-09-01 08:14:44,207 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 320 treesize of output 308 [2023-09-01 08:14:44,227 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 156 treesize of output 150 [2023-09-01 08:14:44,244 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 302 treesize of output 254 [2023-09-01 08:14:44,254 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 254 treesize of output 230 [2023-09-01 08:14:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:14:44,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360704016] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:14:44,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:14:44,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-09-01 08:14:44,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262585331] [2023-09-01 08:14:44,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:14:44,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 08:14:44,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:14:44,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 08:14:44,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=976, Unknown=9, NotChecked=64, Total=1190 [2023-09-01 08:14:45,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 470 [2023-09-01 08:14:45,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 301 transitions, 6290 flow. Second operand has 35 states, 35 states have (on average 137.28571428571428) internal successors, (4805), 35 states have internal predecessors, (4805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:14:45,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:14:45,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 470 [2023-09-01 08:14:45,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:14:49,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:14:51,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:14:53,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-09-01 08:14:58,610 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_1521 (Array Int Int)) (v_ArrVal_1520 (Array Int Int))) (< (+ c_~s~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1520) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1521) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)))) (and .cse0 (or .cse0 (<= c_~n1~0 c_~q1_back~0) (< c_~q1_back~0 0)))) is different from false [2023-09-01 08:15:45,903 WARN L222 SmtUtils]: Spent 44.68s on a formula simplification. DAG size of input: 89 DAG size of output: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 08:15:48,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:15:51,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:15:53,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:15:55,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:16:05,801 INFO L130 PetriNetUnfolder]: 37430/57711 cut-off events. [2023-09-01 08:16:05,801 INFO L131 PetriNetUnfolder]: For 1183301/1183434 co-relation queries the response was YES. [2023-09-01 08:16:06,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431362 conditions, 57711 events. 37430/57711 cut-off events. For 1183301/1183434 co-relation queries the response was YES. Maximal size of possible extension queue 2634. Compared 458363 event pairs, 16694 based on Foata normal form. 190/44719 useless extension candidates. Maximal degree in co-relation 431270. Up to 42831 conditions per place. [2023-09-01 08:16:06,773 INFO L137 encePairwiseOnDemand]: 453/470 looper letters, 321 selfloop transitions, 208 changer transitions 0/531 dead transitions. [2023-09-01 08:16:06,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 531 transitions, 10578 flow [2023-09-01 08:16:06,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 08:16:06,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 08:16:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4144 transitions. [2023-09-01 08:16:06,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.304035216434336 [2023-09-01 08:16:06,781 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4144 transitions. [2023-09-01 08:16:06,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4144 transitions. [2023-09-01 08:16:06,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:16:06,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4144 transitions. [2023-09-01 08:16:06,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 142.89655172413794) internal successors, (4144), 29 states have internal predecessors, (4144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:16:06,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 470.0) internal successors, (14100), 30 states have internal predecessors, (14100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:16:06,796 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 470.0) internal successors, (14100), 30 states have internal predecessors, (14100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:16:06,796 INFO L175 Difference]: Start difference. First operand has 231 places, 301 transitions, 6290 flow. Second operand 29 states and 4144 transitions. [2023-09-01 08:16:06,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 531 transitions, 10578 flow [2023-09-01 08:16:18,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 531 transitions, 10461 flow, removed 18 selfloop flow, removed 5 redundant places. [2023-09-01 08:16:18,343 INFO L231 Difference]: Finished difference. Result has 270 places, 396 transitions, 9175 flow [2023-09-01 08:16:18,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=6220, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9175, PETRI_PLACES=270, PETRI_TRANSITIONS=396} [2023-09-01 08:16:18,344 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 213 predicate places. [2023-09-01 08:16:18,344 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 396 transitions, 9175 flow [2023-09-01 08:16:18,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 137.28571428571428) internal successors, (4805), 35 states have internal predecessors, (4805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:16:18,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:16:18,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:16:18,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-09-01 08:16:18,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-09-01 08:16:18,546 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:16:18,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:16:18,546 INFO L85 PathProgramCache]: Analyzing trace with hash 593685252, now seen corresponding path program 1 times [2023-09-01 08:16:18,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:16:18,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399742904] [2023-09-01 08:16:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:16:18,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:16:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:16:18,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:16:18,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:16:18,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399742904] [2023-09-01 08:16:18,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399742904] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:16:18,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261768523] [2023-09-01 08:16:18,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:16:18,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:16:18,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:16:18,737 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:16:18,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 08:16:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:16:18,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 08:16:18,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:16:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 08:16:18,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:16:18,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261768523] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:16:18,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:16:18,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-09-01 08:16:18,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318942782] [2023-09-01 08:16:18,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:16:18,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:16:18,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:16:18,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:16:18,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-09-01 08:16:18,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 470 [2023-09-01 08:16:18,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 396 transitions, 9175 flow. Second operand has 4 states, 4 states have (on average 201.75) internal successors, (807), 4 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:16:18,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:16:18,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 470 [2023-09-01 08:16:18,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:16:36,094 INFO L130 PetriNetUnfolder]: 48706/79376 cut-off events. [2023-09-01 08:16:36,094 INFO L131 PetriNetUnfolder]: For 2140534/2140807 co-relation queries the response was YES. [2023-09-01 08:16:37,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 641519 conditions, 79376 events. 48706/79376 cut-off events. For 2140534/2140807 co-relation queries the response was YES. Maximal size of possible extension queue 3307. Compared 689655 event pairs, 13986 based on Foata normal form. 2301/66519 useless extension candidates. Maximal degree in co-relation 641412. Up to 35430 conditions per place. [2023-09-01 08:16:38,020 INFO L137 encePairwiseOnDemand]: 462/470 looper letters, 348 selfloop transitions, 122 changer transitions 0/478 dead transitions. [2023-09-01 08:16:38,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 478 transitions, 11333 flow [2023-09-01 08:16:38,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:16:38,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:16:38,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 872 transitions. [2023-09-01 08:16:38,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46382978723404256 [2023-09-01 08:16:38,022 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 872 transitions. [2023-09-01 08:16:38,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 872 transitions. [2023-09-01 08:16:38,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:16:38,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 872 transitions. [2023-09-01 08:16:38,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:16:38,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 470.0) internal successors, (2350), 5 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:16:38,024 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 470.0) internal successors, (2350), 5 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:16:38,024 INFO L175 Difference]: Start difference. First operand has 270 places, 396 transitions, 9175 flow. Second operand 4 states and 872 transitions. [2023-09-01 08:16:38,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 478 transitions, 11333 flow [2023-09-01 08:17:01,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 478 transitions, 10992 flow, removed 149 selfloop flow, removed 9 redundant places. [2023-09-01 08:17:01,201 INFO L231 Difference]: Finished difference. Result has 266 places, 406 transitions, 9566 flow [2023-09-01 08:17:01,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=8846, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=9566, PETRI_PLACES=266, PETRI_TRANSITIONS=406} [2023-09-01 08:17:01,202 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 209 predicate places. [2023-09-01 08:17:01,202 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 406 transitions, 9566 flow [2023-09-01 08:17:01,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 201.75) internal successors, (807), 4 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:17:01,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:17:01,202 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:17:01,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-09-01 08:17:01,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-09-01 08:17:01,408 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:17:01,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:17:01,408 INFO L85 PathProgramCache]: Analyzing trace with hash -691644891, now seen corresponding path program 2 times [2023-09-01 08:17:01,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:17:01,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387664070] [2023-09-01 08:17:01,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:17:01,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:17:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:17:02,334 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:17:02,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:17:02,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387664070] [2023-09-01 08:17:02,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387664070] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:17:02,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798484152] [2023-09-01 08:17:02,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:17:02,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:17:02,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:17:02,341 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:17:02,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 08:17:02,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:17:02,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:17:02,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 08:17:02,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:17:02,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:17:02,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:17:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 08:17:02,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:17:02,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798484152] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:17:02,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:17:02,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2023-09-01 08:17:02,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426065071] [2023-09-01 08:17:02,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:17:02,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:17:02,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:17:02,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:17:02,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-09-01 08:17:02,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 470 [2023-09-01 08:17:02,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 406 transitions, 9566 flow. Second operand has 7 states, 7 states have (on average 183.85714285714286) internal successors, (1287), 7 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:17:02,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:17:02,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 470 [2023-09-01 08:17:02,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:17:21,619 INFO L130 PetriNetUnfolder]: 49563/81041 cut-off events. [2023-09-01 08:17:21,620 INFO L131 PetriNetUnfolder]: For 2099022/2099155 co-relation queries the response was YES. [2023-09-01 08:17:22,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 705938 conditions, 81041 events. 49563/81041 cut-off events. For 2099022/2099155 co-relation queries the response was YES. Maximal size of possible extension queue 3573. Compared 711607 event pairs, 14339 based on Foata normal form. 153/65735 useless extension candidates. Maximal degree in co-relation 705830. Up to 53128 conditions per place. [2023-09-01 08:17:23,370 INFO L137 encePairwiseOnDemand]: 461/470 looper letters, 320 selfloop transitions, 130 changer transitions 0/452 dead transitions. [2023-09-01 08:17:23,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 452 transitions, 10872 flow [2023-09-01 08:17:23,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 08:17:23,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 08:17:23,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1163 transitions. [2023-09-01 08:17:23,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4124113475177305 [2023-09-01 08:17:23,372 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1163 transitions. [2023-09-01 08:17:23,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1163 transitions. [2023-09-01 08:17:23,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:17:23,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1163 transitions. [2023-09-01 08:17:23,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 193.83333333333334) internal successors, (1163), 6 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:17:23,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:17:23,374 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 470.0) internal successors, (3290), 7 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:17:23,374 INFO L175 Difference]: Start difference. First operand has 266 places, 406 transitions, 9566 flow. Second operand 6 states and 1163 transitions. [2023-09-01 08:17:23,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 452 transitions, 10872 flow [2023-09-01 08:17:51,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 452 transitions, 10725 flow, removed 54 selfloop flow, removed 1 redundant places. [2023-09-01 08:17:51,023 INFO L231 Difference]: Finished difference. Result has 270 places, 405 transitions, 9663 flow [2023-09-01 08:17:51,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=9403, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9663, PETRI_PLACES=270, PETRI_TRANSITIONS=405} [2023-09-01 08:17:51,024 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 213 predicate places. [2023-09-01 08:17:51,024 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 405 transitions, 9663 flow [2023-09-01 08:17:51,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 183.85714285714286) internal successors, (1287), 7 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:17:51,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:17:51,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:17:51,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-09-01 08:17:51,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:17:51,226 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:17:51,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:17:51,227 INFO L85 PathProgramCache]: Analyzing trace with hash 2136357935, now seen corresponding path program 1 times [2023-09-01 08:17:51,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:17:51,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031454974] [2023-09-01 08:17:51,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:17:51,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:17:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:17:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:17:51,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:17:51,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031454974] [2023-09-01 08:17:51,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031454974] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:17:51,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926475192] [2023-09-01 08:17:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:17:51,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:17:51,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:17:51,774 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:17:51,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 08:17:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:17:51,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 08:17:51,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:17:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:17:52,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:17:52,130 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:17:52,131 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 27 treesize of output 19 [2023-09-01 08:17:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:17:52,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926475192] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:17:52,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:17:52,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2023-09-01 08:17:52,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822743629] [2023-09-01 08:17:52,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:17:52,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 08:17:52,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:17:52,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 08:17:52,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-09-01 08:17:53,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 470 [2023-09-01 08:17:53,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 405 transitions, 9663 flow. Second operand has 19 states, 19 states have (on average 164.21052631578948) internal successors, (3120), 19 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:17:53,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:17:53,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 470 [2023-09-01 08:17:53,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:18:15,032 INFO L130 PetriNetUnfolder]: 55132/88249 cut-off events. [2023-09-01 08:18:15,032 INFO L131 PetriNetUnfolder]: For 2390698/2390921 co-relation queries the response was YES. [2023-09-01 08:18:16,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757614 conditions, 88249 events. 55132/88249 cut-off events. For 2390698/2390921 co-relation queries the response was YES. Maximal size of possible extension queue 3597. Compared 752914 event pairs, 11661 based on Foata normal form. 113/70666 useless extension candidates. Maximal degree in co-relation 757505. Up to 61743 conditions per place. [2023-09-01 08:18:17,335 INFO L137 encePairwiseOnDemand]: 457/470 looper letters, 559 selfloop transitions, 146 changer transitions 0/713 dead transitions. [2023-09-01 08:18:17,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 713 transitions, 16910 flow [2023-09-01 08:18:17,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 08:18:17,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 08:18:17,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2385 transitions. [2023-09-01 08:18:17,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36246200607902734 [2023-09-01 08:18:17,337 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2385 transitions. [2023-09-01 08:18:17,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2385 transitions. [2023-09-01 08:18:17,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:18:17,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2385 transitions. [2023-09-01 08:18:17,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 170.35714285714286) internal successors, (2385), 14 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:18:17,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 470.0) internal successors, (7050), 15 states have internal predecessors, (7050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:18:17,344 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 470.0) internal successors, (7050), 15 states have internal predecessors, (7050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:18:17,344 INFO L175 Difference]: Start difference. First operand has 270 places, 405 transitions, 9663 flow. Second operand 14 states and 2385 transitions. [2023-09-01 08:18:17,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 713 transitions, 16910 flow [2023-09-01 08:18:49,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 713 transitions, 16680 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 08:18:49,584 INFO L231 Difference]: Finished difference. Result has 282 places, 423 transitions, 10126 flow [2023-09-01 08:18:49,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=9505, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10126, PETRI_PLACES=282, PETRI_TRANSITIONS=423} [2023-09-01 08:18:49,585 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 225 predicate places. [2023-09-01 08:18:49,585 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 423 transitions, 10126 flow [2023-09-01 08:18:49,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 164.21052631578948) internal successors, (3120), 19 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:18:49,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:18:49,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:18:49,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-09-01 08:18:49,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-09-01 08:18:49,786 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:18:49,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:18:49,787 INFO L85 PathProgramCache]: Analyzing trace with hash 996918773, now seen corresponding path program 1 times [2023-09-01 08:18:49,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:18:49,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731272989] [2023-09-01 08:18:49,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:18:49,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:18:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:18:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:18:50,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:18:50,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731272989] [2023-09-01 08:18:50,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731272989] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:18:50,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646990934] [2023-09-01 08:18:50,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:18:50,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:18:50,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:18:50,537 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:18:50,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 08:18:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:18:50,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 08:18:50,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:18:50,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 08:18:50,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:18:50,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 08:18:50,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:18:50,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 08:18:51,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:18:51,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 08:18:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:18:51,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:18:53,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:18:53,635 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 35 treesize of output 36 [2023-09-01 08:18:53,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:18:53,649 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 181 treesize of output 173 [2023-09-01 08:18:53,657 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 160 treesize of output 136 [2023-09-01 08:18:53,674 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 70 treesize of output 64 [2023-09-01 08:18:53,682 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 130 treesize of output 118 [2023-09-01 08:18:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:18:54,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646990934] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:18:54,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:18:54,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-09-01 08:18:54,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011685377] [2023-09-01 08:18:54,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:18:54,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 08:18:54,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:18:54,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 08:18:54,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=427, Unknown=2, NotChecked=0, Total=506 [2023-09-01 08:18:56,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:19:00,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:19:02,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:19:04,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:19:07,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:19:09,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:19:11,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:19:11,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 470 [2023-09-01 08:19:11,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 423 transitions, 10126 flow. Second operand has 23 states, 23 states have (on average 134.82608695652175) internal successors, (3101), 23 states have internal predecessors, (3101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:19:11,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:19:11,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 470 [2023-09-01 08:19:11,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:19:16,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:19:19,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:19:43,947 INFO L130 PetriNetUnfolder]: 55492/89663 cut-off events. [2023-09-01 08:19:43,947 INFO L131 PetriNetUnfolder]: For 2599941/2600176 co-relation queries the response was YES. [2023-09-01 08:19:45,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803981 conditions, 89663 events. 55492/89663 cut-off events. For 2599941/2600176 co-relation queries the response was YES. Maximal size of possible extension queue 3720. Compared 775993 event pairs, 12155 based on Foata normal form. 113/75427 useless extension candidates. Maximal degree in co-relation 803868. Up to 58742 conditions per place. [2023-09-01 08:19:46,209 INFO L137 encePairwiseOnDemand]: 454/470 looper letters, 651 selfloop transitions, 207 changer transitions 208/1074 dead transitions. [2023-09-01 08:19:46,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 1074 transitions, 26196 flow [2023-09-01 08:19:46,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 08:19:46,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 08:19:46,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2570 transitions. [2023-09-01 08:19:46,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3037825059101655 [2023-09-01 08:19:46,214 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2570 transitions. [2023-09-01 08:19:46,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2570 transitions. [2023-09-01 08:19:46,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:19:46,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2570 transitions. [2023-09-01 08:19:46,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 142.77777777777777) internal successors, (2570), 18 states have internal predecessors, (2570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:19:46,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 470.0) internal successors, (8930), 19 states have internal predecessors, (8930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:19:46,223 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 470.0) internal successors, (8930), 19 states have internal predecessors, (8930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:19:46,223 INFO L175 Difference]: Start difference. First operand has 282 places, 423 transitions, 10126 flow. Second operand 18 states and 2570 transitions. [2023-09-01 08:19:46,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 1074 transitions, 26196 flow [2023-09-01 08:20:21,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 1074 transitions, 25632 flow, removed 125 selfloop flow, removed 9 redundant places. [2023-09-01 08:20:21,561 INFO L231 Difference]: Finished difference. Result has 295 places, 451 transitions, 11041 flow [2023-09-01 08:20:21,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=470, PETRI_DIFFERENCE_MINUEND_FLOW=9692, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=11041, PETRI_PLACES=295, PETRI_TRANSITIONS=451} [2023-09-01 08:20:21,562 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 238 predicate places. [2023-09-01 08:20:21,563 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 451 transitions, 11041 flow [2023-09-01 08:20:21,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 134.82608695652175) internal successors, (3101), 23 states have internal predecessors, (3101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:20:21,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:21,564 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:20:21,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-09-01 08:20:21,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-09-01 08:20:21,770 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-09-01 08:20:21,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:21,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1407479975, now seen corresponding path program 2 times [2023-09-01 08:20:21,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:21,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474179602] [2023-09-01 08:20:21,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:21,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:23,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:20:23,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474179602] [2023-09-01 08:20:23,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474179602] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:20:23,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225344958] [2023-09-01 08:20:23,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:20:23,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:20:23,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:20:23,227 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:20:23,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-09-01 08:20:23,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:20:23,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:20:23,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 08:20:23,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:20:23,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:20:23,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:20:23,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:20:23,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:20:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 08:20:23,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:20:23,779 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1809 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1809) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)) is different from false [2023-09-01 08:20:23,794 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1809 (Array Int Int)) (v_ArrVal_1808 (Array Int Int))) (< (+ c_~s~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1808) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1809) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)) is different from false [2023-09-01 08:20:23,811 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:20:23,811 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 174 treesize of output 158 [2023-09-01 08:20:23,817 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 31 treesize of output 25 [2023-09-01 08:20:23,820 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 32 treesize of output 20 [2023-09-01 08:20:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 1 not checked. [2023-09-01 08:20:23,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225344958] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:20:23,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:20:23,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 24 [2023-09-01 08:20:23,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372890022] [2023-09-01 08:20:23,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:20:23,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 08:20:23,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:20:23,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 08:20:23,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=484, Unknown=2, NotChecked=90, Total=650 [2023-09-01 08:20:24,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 470 [2023-09-01 08:20:24,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 451 transitions, 11041 flow. Second operand has 26 states, 26 states have (on average 137.69230769230768) internal successors, (3580), 26 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:20:24,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:20:24,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 470 [2023-09-01 08:20:24,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand