./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.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 f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 11:50:26,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 11:50:26,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 11:50:26,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 11:50:26,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 11:50:26,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 11:50:26,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 11:50:26,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 11:50:26,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 11:50:26,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 11:50:26,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 11:50:26,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 11:50:26,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 11:50:26,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 11:50:26,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 11:50:26,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 11:50:26,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 11:50:26,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 11:50:26,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 11:50:26,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 11:50:26,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 11:50:26,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 11:50:26,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 11:50:26,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 11:50:26,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 11:50:26,617 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 11:50:26,617 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 11:50:26,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 11:50:26,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 11:50:26,620 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 11:50:26,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 11:50:26,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 11:50:26,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 11:50:26,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 11:50:26,625 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 11:50:26,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 11:50:26,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 11:50:26,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 11:50:26,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 11:50:26,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 11:50:26,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 11:50:26,630 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 11:50:26,653 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 11:50:26,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 11:50:26,653 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 11:50:26,654 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 11:50:26,655 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 11:50:26,655 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 11:50:26,656 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 11:50:26,656 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 11:50:26,657 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 11:50:26,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 11:50:26,658 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 11:50:26,658 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 11:50:26,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 11:50:26,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 11:50:26,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 11:50:26,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 11:50:26,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 11:50:26,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 11:50:26,659 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 11:50:26,659 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 11:50:26,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 11:50:26,660 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 11:50:26,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 11:50:26,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 11:50:26,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 11:50:26,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 11:50:26,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:50:26,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 11:50:26,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 11:50:26,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 11:50:26,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 11:50:26,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 11:50:26,662 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 11:50:26,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 11:50:26,662 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 11:50:26,663 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 11:50:26,663 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 11:50:26,663 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 11:50:26,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 11:50:27,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 11:50:27,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 11:50:27,016 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 11:50:27,017 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 11:50:27,018 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-08-30 11:50:28,122 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 11:50:28,299 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 11:50:28,300 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-08-30 11:50:28,315 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/840afdb42/56fd9d29bca94f2c93e58d5665fb891e/FLAG74a3dfcdb [2023-08-30 11:50:28,334 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/840afdb42/56fd9d29bca94f2c93e58d5665fb891e [2023-08-30 11:50:28,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 11:50:28,338 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 11:50:28,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 11:50:28,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 11:50:28,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 11:50:28,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:50:28" (1/1) ... [2023-08-30 11:50:28,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@674939e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:50:28, skipping insertion in model container [2023-08-30 11:50:28,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:50:28" (1/1) ... [2023-08-30 11:50:28,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 11:50:28,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 11:50:28,571 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-prod-cons.wvr.c[3056,3069] [2023-08-30 11:50:28,582 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:50:28,594 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 11:50:28,631 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-prod-cons.wvr.c[3056,3069] [2023-08-30 11:50:28,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:50:28,648 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:50:28,650 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:50:28,656 INFO L208 MainTranslator]: Completed translation [2023-08-30 11:50:28,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:50:28 WrapperNode [2023-08-30 11:50:28,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 11:50:28,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 11:50:28,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 11:50:28,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 11:50:28,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:50:28" (1/1) ... [2023-08-30 11:50:28,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:50:28" (1/1) ... [2023-08-30 11:50:28,711 INFO L138 Inliner]: procedures = 25, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 180 [2023-08-30 11:50:28,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 11:50:28,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 11:50:28,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 11:50:28,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 11:50:28,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:50:28" (1/1) ... [2023-08-30 11:50:28,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:50:28" (1/1) ... [2023-08-30 11:50:28,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:50:28" (1/1) ... [2023-08-30 11:50:28,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:50:28" (1/1) ... [2023-08-30 11:50:28,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:50:28" (1/1) ... [2023-08-30 11:50:28,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:50:28" (1/1) ... [2023-08-30 11:50:28,756 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:50:28" (1/1) ... [2023-08-30 11:50:28,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:50:28" (1/1) ... [2023-08-30 11:50:28,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 11:50:28,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 11:50:28,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 11:50:28,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 11:50:28,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:50:28" (1/1) ... [2023-08-30 11:50:28,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:50:28,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:28,792 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 11:50:28,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 11:50:28,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 11:50:28,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 11:50:28,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 11:50:28,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 11:50:28,831 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 11:50:28,831 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 11:50:28,831 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 11:50:28,832 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 11:50:28,832 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 11:50:28,832 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 11:50:28,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 11:50:28,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 11:50:28,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 11:50:28,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 11:50:28,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 11:50:28,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 11:50:28,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 11:50:28,834 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 11:50:29,003 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 11:50:29,005 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 11:50:29,322 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 11:50:29,413 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 11:50:29,416 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 11:50:29,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:50:29 BoogieIcfgContainer [2023-08-30 11:50:29,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 11:50:29,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 11:50:29,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 11:50:29,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 11:50:29,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:50:28" (1/3) ... [2023-08-30 11:50:29,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a66300d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:50:29, skipping insertion in model container [2023-08-30 11:50:29,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:50:28" (2/3) ... [2023-08-30 11:50:29,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a66300d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:50:29, skipping insertion in model container [2023-08-30 11:50:29,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:50:29" (3/3) ... [2023-08-30 11:50:29,426 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2023-08-30 11:50:29,433 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 11:50:29,441 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 11:50:29,442 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-30 11:50:29,442 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 11:50:29,524 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 11:50:29,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 160 transitions, 344 flow [2023-08-30 11:50:29,657 INFO L130 PetriNetUnfolder]: 11/157 cut-off events. [2023-08-30 11:50:29,657 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 11:50:29,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 157 events. 11/157 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 147 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 130. Up to 3 conditions per place. [2023-08-30 11:50:29,663 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 160 transitions, 344 flow [2023-08-30 11:50:29,670 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 136 transitions, 284 flow [2023-08-30 11:50:29,674 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 11:50:29,686 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 136 transitions, 284 flow [2023-08-30 11:50:29,690 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 136 transitions, 284 flow [2023-08-30 11:50:29,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 136 transitions, 284 flow [2023-08-30 11:50:29,736 INFO L130 PetriNetUnfolder]: 10/136 cut-off events. [2023-08-30 11:50:29,738 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 11:50:29,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 136 events. 10/136 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 146 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 130. Up to 3 conditions per place. [2023-08-30 11:50:29,742 INFO L119 LiptonReduction]: Number of co-enabled transitions 1672 [2023-08-30 11:50:34,915 INFO L134 LiptonReduction]: Checked pairs total: 3726 [2023-08-30 11:50:34,916 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-08-30 11:50:34,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 11:50:34,934 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;@6e3a00e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 11:50:34,934 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-08-30 11:50:34,937 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 11:50:34,937 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 11:50:34,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:34,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 11:50:34,938 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:50:34,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:34,944 INFO L85 PathProgramCache]: Analyzing trace with hash 21239, now seen corresponding path program 1 times [2023-08-30 11:50:34,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:34,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946623392] [2023-08-30 11:50:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:34,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:35,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:35,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946623392] [2023-08-30 11:50:35,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946623392] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:50:35,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:50:35,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:50:35,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572613922] [2023-08-30 11:50:35,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:50:35,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:50:35,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:35,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:50:35,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:50:35,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 299 [2023-08-30 11:50:35,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:35,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:35,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 299 [2023-08-30 11:50:35,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:35,661 INFO L130 PetriNetUnfolder]: 1559/2329 cut-off events. [2023-08-30 11:50:35,662 INFO L131 PetriNetUnfolder]: For 146/146 co-relation queries the response was YES. [2023-08-30 11:50:35,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4865 conditions, 2329 events. 1559/2329 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 11415 event pairs, 1276 based on Foata normal form. 0/1459 useless extension candidates. Maximal degree in co-relation 2251. Up to 1124 conditions per place. [2023-08-30 11:50:35,679 INFO L137 encePairwiseOnDemand]: 293/299 looper letters, 49 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-30 11:50:35,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 53 transitions, 232 flow [2023-08-30 11:50:35,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:50:35,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:50:35,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2023-08-30 11:50:35,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5150501672240803 [2023-08-30 11:50:35,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2023-08-30 11:50:35,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2023-08-30 11:50:35,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:35,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2023-08-30 11:50:35,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:35,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:35,717 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:35,718 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 74 flow. Second operand 3 states and 462 transitions. [2023-08-30 11:50:35,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 53 transitions, 232 flow [2023-08-30 11:50:35,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 53 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 11:50:35,729 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 78 flow [2023-08-30 11:50:35,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-30 11:50:35,737 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-08-30 11:50:35,739 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 78 flow [2023-08-30 11:50:35,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:35,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:35,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 11:50:35,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 11:50:35,741 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:50:35,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:35,750 INFO L85 PathProgramCache]: Analyzing trace with hash 659002, now seen corresponding path program 1 times [2023-08-30 11:50:35,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:35,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495297177] [2023-08-30 11:50:35,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:35,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:35,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:35,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495297177] [2023-08-30 11:50:35,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495297177] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:35,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935698322] [2023-08-30 11:50:35,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:35,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:35,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:35,897 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:50:35,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 11:50:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:35,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:50:35,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:36,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:50:36,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935698322] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:50:36,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:50:36,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-30 11:50:36,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058741534] [2023-08-30 11:50:36,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:50:36,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:50:36,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:36,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:50:36,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 11:50:36,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 299 [2023-08-30 11:50:36,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:36,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:36,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 299 [2023-08-30 11:50:36,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:36,357 INFO L130 PetriNetUnfolder]: 1559/2328 cut-off events. [2023-08-30 11:50:36,358 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 11:50:36,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4833 conditions, 2328 events. 1559/2328 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 11328 event pairs, 1276 based on Foata normal form. 0/1461 useless extension candidates. Maximal degree in co-relation 2414. Up to 1122 conditions per place. [2023-08-30 11:50:36,373 INFO L137 encePairwiseOnDemand]: 296/299 looper letters, 48 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-30 11:50:36,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 52 transitions, 226 flow [2023-08-30 11:50:36,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:50:36,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:50:36,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 591 transitions. [2023-08-30 11:50:36,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49414715719063546 [2023-08-30 11:50:36,377 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 591 transitions. [2023-08-30 11:50:36,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 591 transitions. [2023-08-30 11:50:36,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:36,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 591 transitions. [2023-08-30 11:50:36,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.75) internal successors, (591), 4 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) [2023-08-30 11:50:36,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:36,395 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:36,395 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 78 flow. Second operand 4 states and 591 transitions. [2023-08-30 11:50:36,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 52 transitions, 226 flow [2023-08-30 11:50:36,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 52 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:50:36,397 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 76 flow [2023-08-30 11:50:36,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=76, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-08-30 11:50:36,398 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-08-30 11:50:36,398 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 76 flow [2023-08-30 11:50:36,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:36,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:36,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 11:50:36,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 11:50:36,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:36,605 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:50:36,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:36,605 INFO L85 PathProgramCache]: Analyzing trace with hash 659000, now seen corresponding path program 1 times [2023-08-30 11:50:36,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:36,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118971407] [2023-08-30 11:50:36,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:36,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:36,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:36,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118971407] [2023-08-30 11:50:36,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118971407] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:36,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619997435] [2023-08-30 11:50:36,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:36,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:36,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:36,689 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:50:36,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 11:50:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:36,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:50:36,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:36,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:50:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:36,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619997435] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:50:36,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:50:36,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 11:50:36,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134762688] [2023-08-30 11:50:36,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:50:36,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:50:36,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:36,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:50:36,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:50:36,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 299 [2023-08-30 11:50:36,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 136.14285714285714) internal successors, (953), 7 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:36,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:36,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 299 [2023-08-30 11:50:36,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:37,477 INFO L130 PetriNetUnfolder]: 3896/5817 cut-off events. [2023-08-30 11:50:37,477 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 11:50:37,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12067 conditions, 5817 events. 3896/5817 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 32355 event pairs, 3190 based on Foata normal form. 0/3651 useless extension candidates. Maximal degree in co-relation 9647. Up to 1123 conditions per place. [2023-08-30 11:50:37,511 INFO L137 encePairwiseOnDemand]: 296/299 looper letters, 117 selfloop transitions, 5 changer transitions 0/124 dead transitions. [2023-08-30 11:50:37,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 124 transitions, 540 flow [2023-08-30 11:50:37,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 11:50:37,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 11:50:37,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 935 transitions. [2023-08-30 11:50:37,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5211817168338907 [2023-08-30 11:50:37,514 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 935 transitions. [2023-08-30 11:50:37,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 935 transitions. [2023-08-30 11:50:37,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:37,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 935 transitions. [2023-08-30 11:50:37,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 155.83333333333334) internal successors, (935), 6 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:37,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 299.0) internal successors, (2093), 7 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:37,521 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 299.0) internal successors, (2093), 7 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:37,521 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 76 flow. Second operand 6 states and 935 transitions. [2023-08-30 11:50:37,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 124 transitions, 540 flow [2023-08-30 11:50:37,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 124 transitions, 537 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 11:50:37,524 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 109 flow [2023-08-30 11:50:37,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=109, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-08-30 11:50:37,525 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-08-30 11:50:37,526 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 109 flow [2023-08-30 11:50:37,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 136.14285714285714) internal successors, (953), 7 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:37,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:37,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:50:37,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 11:50:37,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-30 11:50:37,732 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:50:37,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:37,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1838721127, now seen corresponding path program 1 times [2023-08-30 11:50:37,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:37,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944117631] [2023-08-30 11:50:37,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:37,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:37,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:37,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944117631] [2023-08-30 11:50:37,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944117631] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:50:37,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:50:37,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:50:37,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167214747] [2023-08-30 11:50:37,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:50:37,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:50:37,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:37,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:50:37,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:50:37,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 299 [2023-08-30 11:50:37,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:37,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:37,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 299 [2023-08-30 11:50:37,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:38,241 INFO L130 PetriNetUnfolder]: 3076/4747 cut-off events. [2023-08-30 11:50:38,241 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 11:50:38,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9976 conditions, 4747 events. 3076/4747 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 27333 event pairs, 1355 based on Foata normal form. 0/3197 useless extension candidates. Maximal degree in co-relation 7973. Up to 2528 conditions per place. [2023-08-30 11:50:38,269 INFO L137 encePairwiseOnDemand]: 296/299 looper letters, 41 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-08-30 11:50:38,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 223 flow [2023-08-30 11:50:38,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:50:38,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:50:38,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2023-08-30 11:50:38,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4927536231884058 [2023-08-30 11:50:38,272 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2023-08-30 11:50:38,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2023-08-30 11:50:38,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:38,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2023-08-30 11:50:38,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:38,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:38,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:38,276 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 109 flow. Second operand 3 states and 442 transitions. [2023-08-30 11:50:38,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 223 flow [2023-08-30 11:50:38,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 215 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 11:50:38,277 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 103 flow [2023-08-30 11:50:38,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-08-30 11:50:38,278 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-08-30 11:50:38,279 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 103 flow [2023-08-30 11:50:38,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:38,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:38,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:50:38,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 11:50:38,280 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:50:38,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:38,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1838721211, now seen corresponding path program 1 times [2023-08-30 11:50:38,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:38,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739093930] [2023-08-30 11:50:38,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:38,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:38,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:38,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739093930] [2023-08-30 11:50:38,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739093930] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:50:38,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:50:38,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:50:38,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018831921] [2023-08-30 11:50:38,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:50:38,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:50:38,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:38,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:50:38,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 11:50:38,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 299 [2023-08-30 11:50:38,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 133.25) internal successors, (533), 4 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:38,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:38,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 299 [2023-08-30 11:50:38,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:38,777 INFO L130 PetriNetUnfolder]: 2816/4228 cut-off events. [2023-08-30 11:50:38,777 INFO L131 PetriNetUnfolder]: For 634/634 co-relation queries the response was YES. [2023-08-30 11:50:38,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9408 conditions, 4228 events. 2816/4228 cut-off events. For 634/634 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23067 event pairs, 2275 based on Foata normal form. 40/3428 useless extension candidates. Maximal degree in co-relation 9018. Up to 3915 conditions per place. [2023-08-30 11:50:38,801 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 27 selfloop transitions, 2 changer transitions 14/45 dead transitions. [2023-08-30 11:50:38,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 225 flow [2023-08-30 11:50:38,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:50:38,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:50:38,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 575 transitions. [2023-08-30 11:50:38,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2023-08-30 11:50:38,803 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 575 transitions. [2023-08-30 11:50:38,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 575 transitions. [2023-08-30 11:50:38,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:38,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 575 transitions. [2023-08-30 11:50:38,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:38,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:38,808 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:38,808 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 103 flow. Second operand 4 states and 575 transitions. [2023-08-30 11:50:38,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 225 flow [2023-08-30 11:50:38,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 45 transitions, 219 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 11:50:38,810 INFO L231 Difference]: Finished difference. Result has 45 places, 31 transitions, 121 flow [2023-08-30 11:50:38,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=45, PETRI_TRANSITIONS=31} [2023-08-30 11:50:38,811 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2023-08-30 11:50:38,811 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 121 flow [2023-08-30 11:50:38,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.25) internal successors, (533), 4 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:38,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:38,812 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 11:50:38,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 11:50:38,812 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:50:38,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:38,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1841919051, now seen corresponding path program 2 times [2023-08-30 11:50:38,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:38,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801717399] [2023-08-30 11:50:38,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:38,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:38,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:38,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801717399] [2023-08-30 11:50:38,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801717399] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:38,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185276584] [2023-08-30 11:50:38,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:50:38,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:38,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:38,886 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:50:38,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 11:50:38,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:50:38,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:50:38,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 11:50:38,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:50:38,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:50:38,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185276584] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:50:38,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:50:38,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 11:50:38,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322493764] [2023-08-30 11:50:38,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:50:38,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:50:38,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:38,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:50:38,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:50:38,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 299 [2023-08-30 11:50:38,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 31 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:38,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:38,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 299 [2023-08-30 11:50:38,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:39,350 INFO L130 PetriNetUnfolder]: 2725/4062 cut-off events. [2023-08-30 11:50:39,350 INFO L131 PetriNetUnfolder]: For 271/271 co-relation queries the response was YES. [2023-08-30 11:50:39,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9681 conditions, 4062 events. 2725/4062 cut-off events. For 271/271 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 21955 event pairs, 2184 based on Foata normal form. 1/2787 useless extension candidates. Maximal degree in co-relation 9660. Up to 3914 conditions per place. [2023-08-30 11:50:39,378 INFO L137 encePairwiseOnDemand]: 297/299 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 11:50:39,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 30 transitions, 167 flow [2023-08-30 11:50:39,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:50:39,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:50:39,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-08-30 11:50:39,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48272017837235226 [2023-08-30 11:50:39,381 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-08-30 11:50:39,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-08-30 11:50:39,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:39,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-08-30 11:50:39,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:39,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:39,385 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:39,385 INFO L175 Difference]: Start difference. First operand has 45 places, 31 transitions, 121 flow. Second operand 3 states and 433 transitions. [2023-08-30 11:50:39,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 30 transitions, 167 flow [2023-08-30 11:50:39,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 30 transitions, 151 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-30 11:50:39,387 INFO L231 Difference]: Finished difference. Result has 39 places, 30 transitions, 97 flow [2023-08-30 11:50:39,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=39, PETRI_TRANSITIONS=30} [2023-08-30 11:50:39,390 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-08-30 11:50:39,390 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 30 transitions, 97 flow [2023-08-30 11:50:39,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:39,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:39,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:39,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 11:50:39,595 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 [2023-08-30 11:50:39,596 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:50:39,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:39,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1261717240, now seen corresponding path program 1 times [2023-08-30 11:50:39,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:39,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211965507] [2023-08-30 11:50:39,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:39,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:39,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:39,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211965507] [2023-08-30 11:50:39,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211965507] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:39,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090136273] [2023-08-30 11:50:39,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:39,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:39,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:39,712 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:50:39,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 11:50:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:39,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:50:39,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:39,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:50:39,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:50:39,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090136273] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:50:39,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:50:39,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-30 11:50:39,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834473228] [2023-08-30 11:50:39,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:50:39,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:50:39,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:39,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:50:39,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 11:50:39,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 299 [2023-08-30 11:50:39,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:39,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:39,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 299 [2023-08-30 11:50:39,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:40,114 INFO L130 PetriNetUnfolder]: 2045/3046 cut-off events. [2023-08-30 11:50:40,114 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2023-08-30 11:50:40,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7070 conditions, 3046 events. 2045/3046 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 15735 event pairs, 1576 based on Foata normal form. 0/2250 useless extension candidates. Maximal degree in co-relation 7060. Up to 2922 conditions per place. [2023-08-30 11:50:40,125 INFO L137 encePairwiseOnDemand]: 296/299 looper letters, 25 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-30 11:50:40,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 28 transitions, 141 flow [2023-08-30 11:50:40,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:50:40,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:50:40,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2023-08-30 11:50:40,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4816053511705686 [2023-08-30 11:50:40,128 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2023-08-30 11:50:40,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2023-08-30 11:50:40,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:40,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2023-08-30 11:50:40,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:40,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:40,131 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:40,131 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 97 flow. Second operand 3 states and 432 transitions. [2023-08-30 11:50:40,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 28 transitions, 141 flow [2023-08-30 11:50:40,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 28 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:50:40,133 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 90 flow [2023-08-30 11:50:40,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2023-08-30 11:50:40,133 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-08-30 11:50:40,133 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 90 flow [2023-08-30 11:50:40,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:40,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:40,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:40,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 11:50:40,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:40,339 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:50:40,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:40,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1261717129, now seen corresponding path program 1 times [2023-08-30 11:50:40,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:40,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888704905] [2023-08-30 11:50:40,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:40,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:50:40,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:40,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888704905] [2023-08-30 11:50:40,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888704905] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:50:40,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:50:40,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:50:40,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992212005] [2023-08-30 11:50:40,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:50:40,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:50:40,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:40,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:50:40,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 11:50:40,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 299 [2023-08-30 11:50:40,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:40,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:40,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 299 [2023-08-30 11:50:40,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:40,590 INFO L130 PetriNetUnfolder]: 1461/2286 cut-off events. [2023-08-30 11:50:40,590 INFO L131 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2023-08-30 11:50:40,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5339 conditions, 2286 events. 1461/2286 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 12074 event pairs, 148 based on Foata normal form. 0/1886 useless extension candidates. Maximal degree in co-relation 5328. Up to 1928 conditions per place. [2023-08-30 11:50:40,600 INFO L137 encePairwiseOnDemand]: 296/299 looper letters, 34 selfloop transitions, 2 changer transitions 2/39 dead transitions. [2023-08-30 11:50:40,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 39 transitions, 196 flow [2023-08-30 11:50:40,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:50:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:50:40,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 567 transitions. [2023-08-30 11:50:40,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47408026755852845 [2023-08-30 11:50:40,603 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 567 transitions. [2023-08-30 11:50:40,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 567 transitions. [2023-08-30 11:50:40,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:40,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 567 transitions. [2023-08-30 11:50:40,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.75) internal successors, (567), 4 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:40,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:40,609 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:40,609 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 90 flow. Second operand 4 states and 567 transitions. [2023-08-30 11:50:40,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 39 transitions, 196 flow [2023-08-30 11:50:40,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:50:40,612 INFO L231 Difference]: Finished difference. Result has 39 places, 26 transitions, 87 flow [2023-08-30 11:50:40,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=87, PETRI_PLACES=39, PETRI_TRANSITIONS=26} [2023-08-30 11:50:40,614 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-08-30 11:50:40,615 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 26 transitions, 87 flow [2023-08-30 11:50:40,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:40,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:40,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:40,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 11:50:40,616 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:50:40,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:40,616 INFO L85 PathProgramCache]: Analyzing trace with hash -453850703, now seen corresponding path program 1 times [2023-08-30 11:50:40,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:40,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026383777] [2023-08-30 11:50:40,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:40,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:40,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:50:40,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:40,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026383777] [2023-08-30 11:50:40,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026383777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:50:40,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:50:40,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:50:40,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344313813] [2023-08-30 11:50:40,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:50:40,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:50:40,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:40,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:50:40,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:50:40,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 299 [2023-08-30 11:50:40,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 26 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:40,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:40,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 299 [2023-08-30 11:50:40,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:40,907 INFO L130 PetriNetUnfolder]: 1293/2058 cut-off events. [2023-08-30 11:50:40,907 INFO L131 PetriNetUnfolder]: For 236/236 co-relation queries the response was YES. [2023-08-30 11:50:40,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4780 conditions, 2058 events. 1293/2058 cut-off events. For 236/236 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10259 event pairs, 476 based on Foata normal form. 88/1758 useless extension candidates. Maximal degree in co-relation 4768. Up to 1553 conditions per place. [2023-08-30 11:50:40,917 INFO L137 encePairwiseOnDemand]: 294/299 looper letters, 31 selfloop transitions, 2 changer transitions 3/38 dead transitions. [2023-08-30 11:50:40,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 38 transitions, 190 flow [2023-08-30 11:50:40,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:50:40,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:50:40,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-08-30 11:50:40,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48049052396878483 [2023-08-30 11:50:40,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-08-30 11:50:40,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-08-30 11:50:40,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:40,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-08-30 11:50:40,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:40,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:40,923 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:40,923 INFO L175 Difference]: Start difference. First operand has 39 places, 26 transitions, 87 flow. Second operand 3 states and 431 transitions. [2023-08-30 11:50:40,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 38 transitions, 190 flow [2023-08-30 11:50:40,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 187 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 11:50:40,925 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 102 flow [2023-08-30 11:50:40,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-08-30 11:50:40,925 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-08-30 11:50:40,926 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 102 flow [2023-08-30 11:50:40,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:40,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:40,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:40,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 11:50:40,927 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:50:40,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:40,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1920808828, now seen corresponding path program 1 times [2023-08-30 11:50:40,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:40,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887344327] [2023-08-30 11:50:40,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:40,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:41,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:41,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887344327] [2023-08-30 11:50:41,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887344327] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:41,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365054751] [2023-08-30 11:50:41,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:41,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:41,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:41,301 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:50:41,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 11:50:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:41,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 11:50:41,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:41,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:50:41,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:50:41,565 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 [2023-08-30 11:50:41,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:50:41,653 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 [2023-08-30 11:50:41,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:41,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:50:41,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:41,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-08-30 11:50:41,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:41,941 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 173 treesize of output 157 [2023-08-30 11:50:41,955 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 [2023-08-30 11:50:42,010 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 [2023-08-30 11:50:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:42,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365054751] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:50:42,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:50:42,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2023-08-30 11:50:42,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982421674] [2023-08-30 11:50:42,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:50:42,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 11:50:42,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:42,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 11:50:42,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=195, Unknown=1, NotChecked=0, Total=240 [2023-08-30 11:50:44,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:50:46,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:50:46,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 299 [2023-08-30 11:50:46,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 102 flow. Second operand has 16 states, 16 states have (on average 99.875) internal successors, (1598), 16 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:46,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:46,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 299 [2023-08-30 11:50:46,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:49,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:50:50,565 INFO L130 PetriNetUnfolder]: 2190/3502 cut-off events. [2023-08-30 11:50:50,566 INFO L131 PetriNetUnfolder]: For 1185/1185 co-relation queries the response was YES. [2023-08-30 11:50:50,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9130 conditions, 3502 events. 2190/3502 cut-off events. For 1185/1185 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19542 event pairs, 820 based on Foata normal form. 0/2863 useless extension candidates. Maximal degree in co-relation 9117. Up to 1958 conditions per place. [2023-08-30 11:50:50,585 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 129 selfloop transitions, 57 changer transitions 6/194 dead transitions. [2023-08-30 11:50:50,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 194 transitions, 1046 flow [2023-08-30 11:50:50,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 11:50:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 11:50:50,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2359 transitions. [2023-08-30 11:50:50,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3586196412283369 [2023-08-30 11:50:50,592 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2359 transitions. [2023-08-30 11:50:50,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2359 transitions. [2023-08-30 11:50:50,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:50,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2359 transitions. [2023-08-30 11:50:50,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 107.22727272727273) internal successors, (2359), 22 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:50,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 299.0) internal successors, (6877), 23 states have internal predecessors, (6877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:50,609 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 299.0) internal successors, (6877), 23 states have internal predecessors, (6877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:50,610 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 102 flow. Second operand 22 states and 2359 transitions. [2023-08-30 11:50:50,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 194 transitions, 1046 flow [2023-08-30 11:50:50,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 194 transitions, 944 flow, removed 48 selfloop flow, removed 2 redundant places. [2023-08-30 11:50:50,619 INFO L231 Difference]: Finished difference. Result has 71 places, 83 transitions, 509 flow [2023-08-30 11:50:50,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=509, PETRI_PLACES=71, PETRI_TRANSITIONS=83} [2023-08-30 11:50:50,620 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2023-08-30 11:50:50,621 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 83 transitions, 509 flow [2023-08-30 11:50:50,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 99.875) internal successors, (1598), 16 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:50,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:50,622 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:50,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 11:50:50,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-30 11:50:50,827 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:50:50,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:50,828 INFO L85 PathProgramCache]: Analyzing trace with hash 483629055, now seen corresponding path program 1 times [2023-08-30 11:50:50,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:50,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052238510] [2023-08-30 11:50:50,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:50,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:51,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:51,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052238510] [2023-08-30 11:50:51,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052238510] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:51,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417431158] [2023-08-30 11:50:51,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:51,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:51,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:51,818 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:50:51,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 11:50:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:51,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 11:50:51,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:52,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:50:52,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:50:52,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:50:52,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:50:52,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:52,183 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 48 treesize of output 40 [2023-08-30 11:50:52,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-08-30 11:50:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:50:52,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417431158] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:52,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 11:50:52,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 15 [2023-08-30 11:50:52,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427721590] [2023-08-30 11:50:52,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:50:52,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 11:50:52,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:52,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 11:50:52,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=226, Unknown=1, NotChecked=0, Total=272 [2023-08-30 11:50:52,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 299 [2023-08-30 11:50:52,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 83 transitions, 509 flow. Second operand has 6 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:52,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:52,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 299 [2023-08-30 11:50:52,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:52,931 INFO L130 PetriNetUnfolder]: 2439/3843 cut-off events. [2023-08-30 11:50:52,931 INFO L131 PetriNetUnfolder]: For 19608/19608 co-relation queries the response was YES. [2023-08-30 11:50:52,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13873 conditions, 3843 events. 2439/3843 cut-off events. For 19608/19608 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 21273 event pairs, 653 based on Foata normal form. 0/3288 useless extension candidates. Maximal degree in co-relation 13847. Up to 2611 conditions per place. [2023-08-30 11:50:52,961 INFO L137 encePairwiseOnDemand]: 292/299 looper letters, 74 selfloop transitions, 37 changer transitions 3/116 dead transitions. [2023-08-30 11:50:52,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 116 transitions, 913 flow [2023-08-30 11:50:52,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:50:52,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:50:52,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 634 transitions. [2023-08-30 11:50:52,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4240802675585284 [2023-08-30 11:50:52,965 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 634 transitions. [2023-08-30 11:50:52,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 634 transitions. [2023-08-30 11:50:52,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:52,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 634 transitions. [2023-08-30 11:50:52,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.8) internal successors, (634), 5 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:52,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 299.0) internal successors, (1794), 6 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:52,969 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 299.0) internal successors, (1794), 6 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:52,969 INFO L175 Difference]: Start difference. First operand has 71 places, 83 transitions, 509 flow. Second operand 5 states and 634 transitions. [2023-08-30 11:50:52,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 116 transitions, 913 flow [2023-08-30 11:50:53,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 116 transitions, 873 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-08-30 11:50:53,016 INFO L231 Difference]: Finished difference. Result has 73 places, 90 transitions, 677 flow [2023-08-30 11:50:53,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=677, PETRI_PLACES=73, PETRI_TRANSITIONS=90} [2023-08-30 11:50:53,017 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 35 predicate places. [2023-08-30 11:50:53,017 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 90 transitions, 677 flow [2023-08-30 11:50:53,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:53,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:53,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:53,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 11:50:53,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:53,218 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:50:53,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:53,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1914546208, now seen corresponding path program 2 times [2023-08-30 11:50:53,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:53,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500761743] [2023-08-30 11:50:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:53,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:53,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:53,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500761743] [2023-08-30 11:50:53,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500761743] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:53,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668014014] [2023-08-30 11:50:53,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:50:53,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:53,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:53,629 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:50:53,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 11:50:53,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:50:53,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:50:53,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 11:50:53,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:53,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:50:53,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:50:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:50:53,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:50:53,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668014014] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:50:53,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:50:53,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2023-08-30 11:50:53,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959981967] [2023-08-30 11:50:53,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:50:53,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 11:50:53,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:53,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 11:50:53,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-08-30 11:50:53,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 299 [2023-08-30 11:50:53,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 90 transitions, 677 flow. Second operand has 6 states, 6 states have (on average 124.66666666666667) internal successors, (748), 6 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:53,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:53,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 299 [2023-08-30 11:50:53,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:54,288 INFO L130 PetriNetUnfolder]: 2098/3311 cut-off events. [2023-08-30 11:50:54,289 INFO L131 PetriNetUnfolder]: For 19931/19931 co-relation queries the response was YES. [2023-08-30 11:50:54,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11891 conditions, 3311 events. 2098/3311 cut-off events. For 19931/19931 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17769 event pairs, 658 based on Foata normal form. 78/2984 useless extension candidates. Maximal degree in co-relation 11863. Up to 2097 conditions per place. [2023-08-30 11:50:54,311 INFO L137 encePairwiseOnDemand]: 294/299 looper letters, 70 selfloop transitions, 30 changer transitions 3/105 dead transitions. [2023-08-30 11:50:54,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 105 transitions, 874 flow [2023-08-30 11:50:54,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:50:54,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:50:54,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 536 transitions. [2023-08-30 11:50:54,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44816053511705684 [2023-08-30 11:50:54,319 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 536 transitions. [2023-08-30 11:50:54,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 536 transitions. [2023-08-30 11:50:54,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:54,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 536 transitions. [2023-08-30 11:50:54,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:54,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:54,323 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:54,323 INFO L175 Difference]: Start difference. First operand has 73 places, 90 transitions, 677 flow. Second operand 4 states and 536 transitions. [2023-08-30 11:50:54,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 105 transitions, 874 flow [2023-08-30 11:50:54,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 837 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-30 11:50:54,367 INFO L231 Difference]: Finished difference. Result has 71 places, 85 transitions, 619 flow [2023-08-30 11:50:54,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=619, PETRI_PLACES=71, PETRI_TRANSITIONS=85} [2023-08-30 11:50:54,368 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2023-08-30 11:50:54,368 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 85 transitions, 619 flow [2023-08-30 11:50:54,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 124.66666666666667) internal successors, (748), 6 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:54,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:54,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:54,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 11:50:54,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:54,574 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:50:54,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:54,574 INFO L85 PathProgramCache]: Analyzing trace with hash 584470046, now seen corresponding path program 1 times [2023-08-30 11:50:54,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:54,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556312493] [2023-08-30 11:50:54,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:54,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:55,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:55,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556312493] [2023-08-30 11:50:55,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556312493] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:55,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481209809] [2023-08-30 11:50:55,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:55,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:55,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:55,007 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:50:55,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 11:50:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:55,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 11:50:55,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:55,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:50:55,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:50:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:55,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:50:55,362 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_418 (Array Int Int))) (< 0 (+ 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_418) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) c_~d~0))) is different from false [2023-08-30 11:50:55,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:55,379 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 48 treesize of output 40 [2023-08-30 11:50:55,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-08-30 11:50:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:55,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481209809] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:50:55,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:50:55,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-30 11:50:55,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805729187] [2023-08-30 11:50:55,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:50:55,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 11:50:55,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:55,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 11:50:55,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=194, Unknown=1, NotChecked=28, Total=272 [2023-08-30 11:50:55,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 299 [2023-08-30 11:50:55,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 85 transitions, 619 flow. Second operand has 17 states, 17 states have (on average 102.94117647058823) internal successors, (1750), 17 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:55,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:55,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 299 [2023-08-30 11:50:55,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:56,871 INFO L130 PetriNetUnfolder]: 3390/5240 cut-off events. [2023-08-30 11:50:56,871 INFO L131 PetriNetUnfolder]: For 20533/20549 co-relation queries the response was YES. [2023-08-30 11:50:56,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18693 conditions, 5240 events. 3390/5240 cut-off events. For 20533/20549 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 29981 event pairs, 1059 based on Foata normal form. 66/4669 useless extension candidates. Maximal degree in co-relation 18668. Up to 2075 conditions per place. [2023-08-30 11:50:56,904 INFO L137 encePairwiseOnDemand]: 282/299 looper letters, 123 selfloop transitions, 79 changer transitions 3/207 dead transitions. [2023-08-30 11:50:56,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 207 transitions, 1646 flow [2023-08-30 11:50:56,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 11:50:56,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 11:50:56,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1560 transitions. [2023-08-30 11:50:56,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37267080745341613 [2023-08-30 11:50:56,909 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1560 transitions. [2023-08-30 11:50:56,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1560 transitions. [2023-08-30 11:50:56,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:56,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1560 transitions. [2023-08-30 11:50:56,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 111.42857142857143) internal successors, (1560), 14 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:56,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 299.0) internal successors, (4485), 15 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:56,919 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 299.0) internal successors, (4485), 15 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:56,919 INFO L175 Difference]: Start difference. First operand has 71 places, 85 transitions, 619 flow. Second operand 14 states and 1560 transitions. [2023-08-30 11:50:56,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 207 transitions, 1646 flow [2023-08-30 11:50:56,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 207 transitions, 1572 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 11:50:56,950 INFO L231 Difference]: Finished difference. Result has 87 places, 133 transitions, 1212 flow [2023-08-30 11:50:56,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1212, PETRI_PLACES=87, PETRI_TRANSITIONS=133} [2023-08-30 11:50:56,950 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 49 predicate places. [2023-08-30 11:50:56,951 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 133 transitions, 1212 flow [2023-08-30 11:50:56,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 102.94117647058823) internal successors, (1750), 17 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:56,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:56,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:56,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 11:50:57,161 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,SelfDestructingSolverStorable12 [2023-08-30 11:50:57,161 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:50:57,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:57,162 INFO L85 PathProgramCache]: Analyzing trace with hash 778671716, now seen corresponding path program 2 times [2023-08-30 11:50:57,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:57,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033431491] [2023-08-30 11:50:57,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:57,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:57,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:57,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033431491] [2023-08-30 11:50:57,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033431491] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:57,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725224770] [2023-08-30 11:50:57,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:50:57,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:57,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:57,623 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:50:57,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 11:50:57,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:50:57,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:50:57,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 11:50:57,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:57,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:50:57,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:50:57,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:50:57,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:50:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:50:57,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:50:57,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725224770] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:50:57,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:50:57,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-08-30 11:50:57,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749785564] [2023-08-30 11:50:57,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:50:57,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:50:57,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:57,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:50:57,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-08-30 11:50:57,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 299 [2023-08-30 11:50:57,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 133 transitions, 1212 flow. Second operand has 7 states, 7 states have (on average 122.57142857142857) internal successors, (858), 7 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:58,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:58,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 299 [2023-08-30 11:50:58,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:58,471 INFO L130 PetriNetUnfolder]: 3377/5270 cut-off events. [2023-08-30 11:50:58,471 INFO L131 PetriNetUnfolder]: For 35610/35610 co-relation queries the response was YES. [2023-08-30 11:50:58,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25393 conditions, 5270 events. 3377/5270 cut-off events. For 35610/35610 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 29958 event pairs, 738 based on Foata normal form. 57/4771 useless extension candidates. Maximal degree in co-relation 25362. Up to 3444 conditions per place. [2023-08-30 11:50:58,510 INFO L137 encePairwiseOnDemand]: 294/299 looper letters, 119 selfloop transitions, 36 changer transitions 3/160 dead transitions. [2023-08-30 11:50:58,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 160 transitions, 1725 flow [2023-08-30 11:50:58,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:50:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:50:58,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 528 transitions. [2023-08-30 11:50:58,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4414715719063545 [2023-08-30 11:50:58,513 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 528 transitions. [2023-08-30 11:50:58,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 528 transitions. [2023-08-30 11:50:58,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:58,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 528 transitions. [2023-08-30 11:50:58,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:58,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:58,517 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:58,517 INFO L175 Difference]: Start difference. First operand has 87 places, 133 transitions, 1212 flow. Second operand 4 states and 528 transitions. [2023-08-30 11:50:58,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 160 transitions, 1725 flow [2023-08-30 11:50:58,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 160 transitions, 1675 flow, removed 20 selfloop flow, removed 4 redundant places. [2023-08-30 11:50:58,655 INFO L231 Difference]: Finished difference. Result has 87 places, 135 transitions, 1328 flow [2023-08-30 11:50:58,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1328, PETRI_PLACES=87, PETRI_TRANSITIONS=135} [2023-08-30 11:50:58,656 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 49 predicate places. [2023-08-30 11:50:58,656 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 135 transitions, 1328 flow [2023-08-30 11:50:58,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.57142857142857) internal successors, (858), 7 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:58,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:58,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:58,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 11:50:58,857 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,SelfDestructingSolverStorable13 [2023-08-30 11:50:58,858 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:50:58,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:58,858 INFO L85 PathProgramCache]: Analyzing trace with hash 778611264, now seen corresponding path program 1 times [2023-08-30 11:50:58,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:58,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319516650] [2023-08-30 11:50:58,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:58,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:59,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:59,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319516650] [2023-08-30 11:50:59,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319516650] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:59,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618523618] [2023-08-30 11:50:59,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:59,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:59,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:59,308 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:50:59,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 11:50:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:59,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-30 11:50:59,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:59,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:50:59,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:50:59,550 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 [2023-08-30 11:50:59,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:50:59,697 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 [2023-08-30 11:50:59,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:50:59,770 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 [2023-08-30 11:50:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:59,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:50:59,823 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_513 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_513) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)) is different from false [2023-08-30 11:50:59,837 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_513 (Array Int Int)) (v_ArrVal_512 (Array Int Int))) (< (+ c_~d~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_512) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_513) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)) is different from false [2023-08-30 11:50:59,973 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:59,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2023-08-30 11:50:59,984 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:59,985 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 1361 treesize of output 1297 [2023-08-30 11:51:00,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 67 [2023-08-30 11:51:00,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 122 [2023-08-30 11:51:00,024 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 66 treesize of output 54 [2023-08-30 11:51:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:00,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618523618] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:51:00,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:51:00,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 11:51:00,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524887945] [2023-08-30 11:51:00,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:51:00,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 11:51:00,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:51:00,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 11:51:00,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=249, Unknown=2, NotChecked=66, Total=380 [2023-08-30 11:51:00,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 299 [2023-08-30 11:51:00,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 135 transitions, 1328 flow. Second operand has 20 states, 20 states have (on average 96.65) internal successors, (1933), 20 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:00,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:51:00,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 299 [2023-08-30 11:51:00,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:51:01,214 INFO L130 PetriNetUnfolder]: 2870/4463 cut-off events. [2023-08-30 11:51:01,214 INFO L131 PetriNetUnfolder]: For 33959/34019 co-relation queries the response was YES. [2023-08-30 11:51:01,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22303 conditions, 4463 events. 2870/4463 cut-off events. For 33959/34019 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 24752 event pairs, 1272 based on Foata normal form. 38/4031 useless extension candidates. Maximal degree in co-relation 22270. Up to 3230 conditions per place. [2023-08-30 11:51:01,243 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 137 selfloop transitions, 33 changer transitions 4/176 dead transitions. [2023-08-30 11:51:01,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 176 transitions, 1892 flow [2023-08-30 11:51:01,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 11:51:01,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 11:51:01,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1122 transitions. [2023-08-30 11:51:01,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3411371237458194 [2023-08-30 11:51:01,247 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1122 transitions. [2023-08-30 11:51:01,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1122 transitions. [2023-08-30 11:51:01,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:51:01,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1122 transitions. [2023-08-30 11:51:01,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 102.0) internal successors, (1122), 11 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:01,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 299.0) internal successors, (3588), 12 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:01,254 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 299.0) internal successors, (3588), 12 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:01,254 INFO L175 Difference]: Start difference. First operand has 87 places, 135 transitions, 1328 flow. Second operand 11 states and 1122 transitions. [2023-08-30 11:51:01,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 176 transitions, 1892 flow [2023-08-30 11:51:01,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 176 transitions, 1835 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 11:51:01,325 INFO L231 Difference]: Finished difference. Result has 96 places, 140 transitions, 1393 flow [2023-08-30 11:51:01,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1393, PETRI_PLACES=96, PETRI_TRANSITIONS=140} [2023-08-30 11:51:01,326 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 58 predicate places. [2023-08-30 11:51:01,326 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 140 transitions, 1393 flow [2023-08-30 11:51:01,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 96.65) internal successors, (1933), 20 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:01,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:51:01,327 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:51:01,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 11:51:01,537 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,SelfDestructingSolverStorable14 [2023-08-30 11:51:01,537 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:51:01,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:51:01,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1915448373, now seen corresponding path program 2 times [2023-08-30 11:51:01,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:51:01,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231123680] [2023-08-30 11:51:01,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:51:01,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:51:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:51:02,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:02,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:51:02,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231123680] [2023-08-30 11:51:02,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231123680] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:51:02,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290561864] [2023-08-30 11:51:02,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:51:02,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:51:02,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:51:02,610 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:51:02,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 11:51:02,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:51:02,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:51:02,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 11:51:02,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:51:02,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:51:02,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:51:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:51:02,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:51:02,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290561864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:51:02,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:51:02,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2023-08-30 11:51:02,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173998530] [2023-08-30 11:51:02,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:51:02,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 11:51:02,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:51:02,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 11:51:02,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-08-30 11:51:02,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 299 [2023-08-30 11:51:02,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 140 transitions, 1393 flow. Second operand has 6 states, 6 states have (on average 124.83333333333333) internal successors, (749), 6 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:02,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:51:02,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 299 [2023-08-30 11:51:02,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:51:03,417 INFO L130 PetriNetUnfolder]: 2995/4699 cut-off events. [2023-08-30 11:51:03,417 INFO L131 PetriNetUnfolder]: For 38957/38957 co-relation queries the response was YES. [2023-08-30 11:51:03,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23870 conditions, 4699 events. 2995/4699 cut-off events. For 38957/38957 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 26317 event pairs, 784 based on Foata normal form. 57/4275 useless extension candidates. Maximal degree in co-relation 23836. Up to 3128 conditions per place. [2023-08-30 11:51:03,484 INFO L137 encePairwiseOnDemand]: 294/299 looper letters, 132 selfloop transitions, 28 changer transitions 3/165 dead transitions. [2023-08-30 11:51:03,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 165 transitions, 1860 flow [2023-08-30 11:51:03,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:51:03,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:51:03,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 537 transitions. [2023-08-30 11:51:03,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489966555183946 [2023-08-30 11:51:03,487 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 537 transitions. [2023-08-30 11:51:03,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 537 transitions. [2023-08-30 11:51:03,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:51:03,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 537 transitions. [2023-08-30 11:51:03,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:03,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:03,492 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:03,492 INFO L175 Difference]: Start difference. First operand has 96 places, 140 transitions, 1393 flow. Second operand 4 states and 537 transitions. [2023-08-30 11:51:03,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 165 transitions, 1860 flow [2023-08-30 11:51:03,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 165 transitions, 1816 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-30 11:51:03,566 INFO L231 Difference]: Finished difference. Result has 94 places, 140 transitions, 1427 flow [2023-08-30 11:51:03,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1427, PETRI_PLACES=94, PETRI_TRANSITIONS=140} [2023-08-30 11:51:03,567 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 56 predicate places. [2023-08-30 11:51:03,567 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 140 transitions, 1427 flow [2023-08-30 11:51:03,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 124.83333333333333) internal successors, (749), 6 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:03,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:51:03,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:51:03,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 11:51:03,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 11:51:03,775 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:51:03,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:51:03,776 INFO L85 PathProgramCache]: Analyzing trace with hash -966002759, now seen corresponding path program 1 times [2023-08-30 11:51:03,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:51:03,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909808918] [2023-08-30 11:51:03,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:51:03,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:51:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:51:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:51:03,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:51:03,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909808918] [2023-08-30 11:51:03,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909808918] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:51:03,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262348769] [2023-08-30 11:51:03,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:51:03,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:51:03,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:51:03,857 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:51:03,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 11:51:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:51:03,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 11:51:03,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:51:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:04,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:51:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:04,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262348769] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:51:04,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:51:04,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 13 [2023-08-30 11:51:04,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121083500] [2023-08-30 11:51:04,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:51:04,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 11:51:04,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:51:04,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 11:51:04,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-08-30 11:51:04,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 299 [2023-08-30 11:51:04,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 140 transitions, 1427 flow. Second operand has 15 states, 15 states have (on average 128.4) internal successors, (1926), 15 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:04,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:51:04,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 299 [2023-08-30 11:51:04,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:51:05,093 INFO L130 PetriNetUnfolder]: 3963/6317 cut-off events. [2023-08-30 11:51:05,093 INFO L131 PetriNetUnfolder]: For 64360/64360 co-relation queries the response was YES. [2023-08-30 11:51:05,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32688 conditions, 6317 events. 3963/6317 cut-off events. For 64360/64360 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 37941 event pairs, 1061 based on Foata normal form. 320/6009 useless extension candidates. Maximal degree in co-relation 32653. Up to 4255 conditions per place. [2023-08-30 11:51:05,118 INFO L137 encePairwiseOnDemand]: 292/299 looper letters, 92 selfloop transitions, 26 changer transitions 96/216 dead transitions. [2023-08-30 11:51:05,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 216 transitions, 2478 flow [2023-08-30 11:51:05,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 11:51:05,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 11:51:05,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1228 transitions. [2023-08-30 11:51:05,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45633593459680416 [2023-08-30 11:51:05,122 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1228 transitions. [2023-08-30 11:51:05,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1228 transitions. [2023-08-30 11:51:05,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:51:05,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1228 transitions. [2023-08-30 11:51:05,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 136.44444444444446) internal successors, (1228), 9 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:05,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 299.0) internal successors, (2990), 10 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:05,129 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 299.0) internal successors, (2990), 10 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:05,129 INFO L175 Difference]: Start difference. First operand has 94 places, 140 transitions, 1427 flow. Second operand 9 states and 1228 transitions. [2023-08-30 11:51:05,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 216 transitions, 2478 flow [2023-08-30 11:51:05,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 216 transitions, 2431 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 11:51:05,219 INFO L231 Difference]: Finished difference. Result has 103 places, 90 transitions, 1113 flow [2023-08-30 11:51:05,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1113, PETRI_PLACES=103, PETRI_TRANSITIONS=90} [2023-08-30 11:51:05,220 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2023-08-30 11:51:05,220 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 90 transitions, 1113 flow [2023-08-30 11:51:05,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 128.4) internal successors, (1926), 15 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:05,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:51:05,221 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:51:05,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 11:51:05,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 11:51:05,426 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:51:05,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:51:05,426 INFO L85 PathProgramCache]: Analyzing trace with hash 356588192, now seen corresponding path program 3 times [2023-08-30 11:51:05,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:51:05,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524820382] [2023-08-30 11:51:05,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:51:05,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:51:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:51:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:06,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:51:06,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524820382] [2023-08-30 11:51:06,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524820382] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:51:06,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912159788] [2023-08-30 11:51:06,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:51:06,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:51:06,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:51:06,412 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:51:06,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 11:51:06,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 11:51:06,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:51:06,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 11:51:06,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:51:06,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:51:06,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:51:06,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:51:06,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:51:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:51:06,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:51:06,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912159788] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:51:06,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:51:06,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-08-30 11:51:06,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171063181] [2023-08-30 11:51:06,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:51:06,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:51:06,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:51:06,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:51:06,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-08-30 11:51:06,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 299 [2023-08-30 11:51:06,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 90 transitions, 1113 flow. Second operand has 7 states, 7 states have (on average 122.57142857142857) internal successors, (858), 7 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:06,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:51:06,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 299 [2023-08-30 11:51:06,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:51:07,382 INFO L130 PetriNetUnfolder]: 2435/3930 cut-off events. [2023-08-30 11:51:07,382 INFO L131 PetriNetUnfolder]: For 55860/56076 co-relation queries the response was YES. [2023-08-30 11:51:07,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22263 conditions, 3930 events. 2435/3930 cut-off events. For 55860/56076 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 21431 event pairs, 732 based on Foata normal form. 112/3648 useless extension candidates. Maximal degree in co-relation 22225. Up to 2813 conditions per place. [2023-08-30 11:51:07,402 INFO L137 encePairwiseOnDemand]: 295/299 looper letters, 72 selfloop transitions, 27 changer transitions 6/107 dead transitions. [2023-08-30 11:51:07,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 107 transitions, 1386 flow [2023-08-30 11:51:07,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:51:07,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:51:07,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 527 transitions. [2023-08-30 11:51:07,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4406354515050167 [2023-08-30 11:51:07,404 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 527 transitions. [2023-08-30 11:51:07,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 527 transitions. [2023-08-30 11:51:07,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:51:07,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 527 transitions. [2023-08-30 11:51:07,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.75) internal successors, (527), 4 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:07,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:07,408 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:07,408 INFO L175 Difference]: Start difference. First operand has 103 places, 90 transitions, 1113 flow. Second operand 4 states and 527 transitions. [2023-08-30 11:51:07,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 107 transitions, 1386 flow [2023-08-30 11:51:07,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 107 transitions, 1252 flow, removed 65 selfloop flow, removed 12 redundant places. [2023-08-30 11:51:07,463 INFO L231 Difference]: Finished difference. Result has 74 places, 85 transitions, 975 flow [2023-08-30 11:51:07,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=975, PETRI_PLACES=74, PETRI_TRANSITIONS=85} [2023-08-30 11:51:07,464 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 36 predicate places. [2023-08-30 11:51:07,464 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 85 transitions, 975 flow [2023-08-30 11:51:07,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.57142857142857) internal successors, (858), 7 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:07,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:51:07,464 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:51:07,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 11:51:07,665 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,SelfDestructingSolverStorable17 [2023-08-30 11:51:07,665 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:51:07,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:51:07,666 INFO L85 PathProgramCache]: Analyzing trace with hash 203769688, now seen corresponding path program 1 times [2023-08-30 11:51:07,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:51:07,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259879212] [2023-08-30 11:51:07,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:51:07,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:51:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:51:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:08,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:51:08,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259879212] [2023-08-30 11:51:08,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259879212] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:51:08,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114609980] [2023-08-30 11:51:08,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:51:08,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:51:08,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:51:08,257 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:51:08,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 11:51:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:51:08,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-30 11:51:08,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:51:08,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:51:08,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:51:08,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:51:08,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:51:08,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:51:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:08,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:51:09,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:51:09,297 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 91 treesize of output 67 [2023-08-30 11:51:09,324 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:51:09,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 405 treesize of output 391 [2023-08-30 11:51:09,359 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:51:09,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 107 treesize of output 106 [2023-08-30 11:51:09,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:51:09,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 93 [2023-08-30 11:51:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:11,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114609980] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:51:11,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:51:11,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-08-30 11:51:11,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348723591] [2023-08-30 11:51:11,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:51:11,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 11:51:11,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:51:11,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 11:51:11,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=656, Unknown=1, NotChecked=0, Total=756 [2023-08-30 11:51:12,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 299 [2023-08-30 11:51:12,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 85 transitions, 975 flow. Second operand has 28 states, 28 states have (on average 98.60714285714286) internal successors, (2761), 28 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:12,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:51:12,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 299 [2023-08-30 11:51:12,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:51:15,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:51:18,219 INFO L130 PetriNetUnfolder]: 4634/7299 cut-off events. [2023-08-30 11:51:18,219 INFO L131 PetriNetUnfolder]: For 51396/51432 co-relation queries the response was YES. [2023-08-30 11:51:18,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35155 conditions, 7299 events. 4634/7299 cut-off events. For 51396/51432 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 44345 event pairs, 1433 based on Foata normal form. 88/6701 useless extension candidates. Maximal degree in co-relation 35126. Up to 5199 conditions per place. [2023-08-30 11:51:18,257 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 209 selfloop transitions, 120 changer transitions 11/342 dead transitions. [2023-08-30 11:51:18,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 342 transitions, 3632 flow [2023-08-30 11:51:18,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 11:51:18,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 11:51:18,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2977 transitions. [2023-08-30 11:51:18,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3555900621118012 [2023-08-30 11:51:18,263 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2977 transitions. [2023-08-30 11:51:18,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2977 transitions. [2023-08-30 11:51:18,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:51:18,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2977 transitions. [2023-08-30 11:51:18,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 106.32142857142857) internal successors, (2977), 28 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:18,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 299.0) internal successors, (8671), 29 states have internal predecessors, (8671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:18,277 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 299.0) internal successors, (8671), 29 states have internal predecessors, (8671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:18,277 INFO L175 Difference]: Start difference. First operand has 74 places, 85 transitions, 975 flow. Second operand 28 states and 2977 transitions. [2023-08-30 11:51:18,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 342 transitions, 3632 flow [2023-08-30 11:51:18,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 342 transitions, 3534 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 11:51:18,316 INFO L231 Difference]: Finished difference. Result has 102 places, 180 transitions, 2455 flow [2023-08-30 11:51:18,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2455, PETRI_PLACES=102, PETRI_TRANSITIONS=180} [2023-08-30 11:51:18,316 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 64 predicate places. [2023-08-30 11:51:18,316 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 180 transitions, 2455 flow [2023-08-30 11:51:18,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 98.60714285714286) internal successors, (2761), 28 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:18,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:51:18,317 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:51:18,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 11:51:18,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:51:18,518 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:51:18,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:51:18,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1866153395, now seen corresponding path program 2 times [2023-08-30 11:51:18,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:51:18,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784763500] [2023-08-30 11:51:18,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:51:18,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:51:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:51:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:19,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:51:19,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784763500] [2023-08-30 11:51:19,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784763500] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:51:19,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106173902] [2023-08-30 11:51:19,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:51:19,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:51:19,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:51:19,358 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:51:19,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 11:51:19,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:51:19,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:51:19,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 11:51:19,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:51:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:51:19,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:51:19,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:51:19,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 51 [2023-08-30 11:51:19,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:51:19,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106173902] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:51:19,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:51:19,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 20 [2023-08-30 11:51:19,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960733921] [2023-08-30 11:51:19,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:51:19,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 11:51:19,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:51:19,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 11:51:19,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-08-30 11:51:20,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 299 [2023-08-30 11:51:20,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 180 transitions, 2455 flow. Second operand has 22 states, 22 states have (on average 120.04545454545455) internal successors, (2641), 22 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:20,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:51:20,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 299 [2023-08-30 11:51:20,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:51:21,948 INFO L130 PetriNetUnfolder]: 4989/7940 cut-off events. [2023-08-30 11:51:21,948 INFO L131 PetriNetUnfolder]: For 63940/63940 co-relation queries the response was YES. [2023-08-30 11:51:21,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39869 conditions, 7940 events. 4989/7940 cut-off events. For 63940/63940 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 49358 event pairs, 1846 based on Foata normal form. 110/7331 useless extension candidates. Maximal degree in co-relation 39836. Up to 5567 conditions per place. [2023-08-30 11:51:21,995 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 201 selfloop transitions, 90 changer transitions 12/305 dead transitions. [2023-08-30 11:51:21,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 305 transitions, 3819 flow [2023-08-30 11:51:21,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 11:51:21,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 11:51:21,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2168 transitions. [2023-08-30 11:51:21,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42651977178831396 [2023-08-30 11:51:21,998 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2168 transitions. [2023-08-30 11:51:21,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2168 transitions. [2023-08-30 11:51:21,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:51:21,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2168 transitions. [2023-08-30 11:51:22,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 127.52941176470588) internal successors, (2168), 17 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:22,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 299.0) internal successors, (5382), 18 states have internal predecessors, (5382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:22,006 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 299.0) internal successors, (5382), 18 states have internal predecessors, (5382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:22,006 INFO L175 Difference]: Start difference. First operand has 102 places, 180 transitions, 2455 flow. Second operand 17 states and 2168 transitions. [2023-08-30 11:51:22,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 305 transitions, 3819 flow [2023-08-30 11:51:22,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 305 transitions, 3301 flow, removed 252 selfloop flow, removed 5 redundant places. [2023-08-30 11:51:22,083 INFO L231 Difference]: Finished difference. Result has 118 places, 202 transitions, 2478 flow [2023-08-30 11:51:22,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=1936, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2478, PETRI_PLACES=118, PETRI_TRANSITIONS=202} [2023-08-30 11:51:22,084 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 80 predicate places. [2023-08-30 11:51:22,084 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 202 transitions, 2478 flow [2023-08-30 11:51:22,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 120.04545454545455) internal successors, (2641), 22 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:22,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:51:22,085 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:51:22,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 11:51:22,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:51:22,290 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:51:22,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:51:22,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1692522056, now seen corresponding path program 3 times [2023-08-30 11:51:22,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:51:22,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606476250] [2023-08-30 11:51:22,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:51:22,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:51:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:51:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:22,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:51:22,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606476250] [2023-08-30 11:51:22,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606476250] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:51:22,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101649175] [2023-08-30 11:51:22,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:51:22,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:51:22,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:51:22,829 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:51:22,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 11:51:22,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 11:51:22,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:51:22,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 11:51:22,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:51:23,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:23,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:51:23,591 INFO L321 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2023-08-30 11:51:23,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 47 [2023-08-30 11:51:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:24,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101649175] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:51:24,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:51:24,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-30 11:51:24,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917831041] [2023-08-30 11:51:24,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:51:24,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 11:51:24,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:51:24,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 11:51:24,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2023-08-30 11:51:24,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 299 [2023-08-30 11:51:24,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 202 transitions, 2478 flow. Second operand has 26 states, 26 states have (on average 117.73076923076923) internal successors, (3061), 26 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:24,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:51:24,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 299 [2023-08-30 11:51:24,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:51:29,579 INFO L130 PetriNetUnfolder]: 8710/13884 cut-off events. [2023-08-30 11:51:29,579 INFO L131 PetriNetUnfolder]: For 111242/111500 co-relation queries the response was YES. [2023-08-30 11:51:29,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71108 conditions, 13884 events. 8710/13884 cut-off events. For 111242/111500 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 93640 event pairs, 2168 based on Foata normal form. 293/12620 useless extension candidates. Maximal degree in co-relation 71069. Up to 9848 conditions per place. [2023-08-30 11:51:29,670 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 386 selfloop transitions, 210 changer transitions 15/613 dead transitions. [2023-08-30 11:51:29,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 613 transitions, 7025 flow [2023-08-30 11:51:29,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-30 11:51:29,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-30 11:51:29,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4916 transitions. [2023-08-30 11:51:29,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421576194151445 [2023-08-30 11:51:29,677 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4916 transitions. [2023-08-30 11:51:29,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4916 transitions. [2023-08-30 11:51:29,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:51:29,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4916 transitions. [2023-08-30 11:51:29,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 126.05128205128206) internal successors, (4916), 39 states have internal predecessors, (4916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:29,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 299.0) internal successors, (11960), 40 states have internal predecessors, (11960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:29,696 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 299.0) internal successors, (11960), 40 states have internal predecessors, (11960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:29,696 INFO L175 Difference]: Start difference. First operand has 118 places, 202 transitions, 2478 flow. Second operand 39 states and 4916 transitions. [2023-08-30 11:51:29,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 613 transitions, 7025 flow [2023-08-30 11:51:29,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 613 transitions, 6826 flow, removed 69 selfloop flow, removed 8 redundant places. [2023-08-30 11:51:29,903 INFO L231 Difference]: Finished difference. Result has 162 places, 339 transitions, 5048 flow [2023-08-30 11:51:29,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=2175, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=5048, PETRI_PLACES=162, PETRI_TRANSITIONS=339} [2023-08-30 11:51:29,904 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 124 predicate places. [2023-08-30 11:51:29,904 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 339 transitions, 5048 flow [2023-08-30 11:51:29,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 117.73076923076923) internal successors, (3061), 26 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:29,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:51:29,905 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:51:29,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-30 11:51:30,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:51:30,105 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:51:30,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:51:30,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1048623500, now seen corresponding path program 1 times [2023-08-30 11:51:30,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:51:30,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130534808] [2023-08-30 11:51:30,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:51:30,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:51:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:51:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:30,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:51:30,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130534808] [2023-08-30 11:51:30,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130534808] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:51:30,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706849911] [2023-08-30 11:51:30,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:51:30,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:51:30,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:51:30,473 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:51:30,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 11:51:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:51:30,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 11:51:30,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:51:30,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-08-30 11:51:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:51:30,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:51:30,793 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:51:30,794 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 [2023-08-30 11:51:30,884 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:51:30,884 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 31 treesize of output 23 [2023-08-30 11:51:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:51:30,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706849911] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:51:30,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:51:30,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 19 [2023-08-30 11:51:30,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397807479] [2023-08-30 11:51:30,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:51:30,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 11:51:30,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:51:30,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 11:51:30,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2023-08-30 11:51:31,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 299 [2023-08-30 11:51:31,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 339 transitions, 5048 flow. Second operand has 21 states, 21 states have (on average 120.23809523809524) internal successors, (2525), 21 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:31,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:51:31,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 299 [2023-08-30 11:51:31,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:51:35,036 INFO L130 PetriNetUnfolder]: 11340/18547 cut-off events. [2023-08-30 11:51:35,036 INFO L131 PetriNetUnfolder]: For 266041/266041 co-relation queries the response was YES. [2023-08-30 11:51:35,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108021 conditions, 18547 events. 11340/18547 cut-off events. For 266041/266041 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 132967 event pairs, 3013 based on Foata normal form. 998/17700 useless extension candidates. Maximal degree in co-relation 107967. Up to 12856 conditions per place. [2023-08-30 11:51:35,177 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 443 selfloop transitions, 211 changer transitions 33/689 dead transitions. [2023-08-30 11:51:35,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 689 transitions, 10047 flow [2023-08-30 11:51:35,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 11:51:35,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 11:51:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4234 transitions. [2023-08-30 11:51:35,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4291071247592987 [2023-08-30 11:51:35,181 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4234 transitions. [2023-08-30 11:51:35,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4234 transitions. [2023-08-30 11:51:35,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:51:35,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4234 transitions. [2023-08-30 11:51:35,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 128.3030303030303) internal successors, (4234), 33 states have internal predecessors, (4234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:35,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 299.0) internal successors, (10166), 34 states have internal predecessors, (10166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:35,194 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 299.0) internal successors, (10166), 34 states have internal predecessors, (10166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:35,194 INFO L175 Difference]: Start difference. First operand has 162 places, 339 transitions, 5048 flow. Second operand 33 states and 4234 transitions. [2023-08-30 11:51:35,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 689 transitions, 10047 flow [2023-08-30 11:51:36,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 689 transitions, 8379 flow, removed 757 selfloop flow, removed 15 redundant places. [2023-08-30 11:51:36,249 INFO L231 Difference]: Finished difference. Result has 188 places, 392 transitions, 5920 flow [2023-08-30 11:51:36,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=3354, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5920, PETRI_PLACES=188, PETRI_TRANSITIONS=392} [2023-08-30 11:51:36,250 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 150 predicate places. [2023-08-30 11:51:36,250 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 392 transitions, 5920 flow [2023-08-30 11:51:36,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 120.23809523809524) internal successors, (2525), 21 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:36,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:51:36,250 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:51:36,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-30 11:51:36,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:51:36,451 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:51:36,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:51:36,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1822981978, now seen corresponding path program 1 times [2023-08-30 11:51:36,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:51:36,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647571790] [2023-08-30 11:51:36,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:51:36,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:51:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:51:37,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:37,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:51:37,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647571790] [2023-08-30 11:51:37,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647571790] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:51:37,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962873916] [2023-08-30 11:51:37,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:51:37,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:51:37,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:51:37,124 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:51:37,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 11:51:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:51:37,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 11:51:37,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:51:37,304 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 16 treesize of output 12 [2023-08-30 11:51:37,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 11:51:37,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 11:51:37,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:51:37,610 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 30 treesize of output 30 [2023-08-30 11:51:37,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:51:37,847 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 30 treesize of output 30 [2023-08-30 11:51:37,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:37,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:51:37,905 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_899 (Array Int Int))) (< (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_899) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) c_~d~0) 2147483648)) is different from false [2023-08-30 11:51:42,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:51:42,647 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 150 treesize of output 95 [2023-08-30 11:51:42,686 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:51:42,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 15288 treesize of output 13707 [2023-08-30 11:51:42,738 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 203 treesize of output 175 [2023-08-30 11:51:42,770 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:51:42,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 128 treesize of output 132 [2023-08-30 11:51:42,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:51:42,787 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 96 treesize of output 58 [2023-08-30 11:51:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:43,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962873916] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:51:43,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:51:43,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-30 11:51:43,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800341792] [2023-08-30 11:51:43,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:51:43,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 11:51:43,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:51:43,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 11:51:43,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=790, Unknown=14, NotChecked=58, Total=992 [2023-08-30 11:51:43,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 299 [2023-08-30 11:51:43,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 392 transitions, 5920 flow. Second operand has 32 states, 32 states have (on average 95.5) internal successors, (3056), 32 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:43,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:51:43,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 299 [2023-08-30 11:51:43,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:51:46,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:51:48,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:51:51,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:51:53,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:51:56,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:51:58,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:52:02,406 INFO L130 PetriNetUnfolder]: 13241/21327 cut-off events. [2023-08-30 11:52:02,406 INFO L131 PetriNetUnfolder]: For 298981/299443 co-relation queries the response was YES. [2023-08-30 11:52:02,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130747 conditions, 21327 events. 13241/21327 cut-off events. For 298981/299443 co-relation queries the response was YES. Maximal size of possible extension queue 962. Compared 155438 event pairs, 4284 based on Foata normal form. 101/19041 useless extension candidates. Maximal degree in co-relation 130686. Up to 15249 conditions per place. [2023-08-30 11:52:02,588 INFO L137 encePairwiseOnDemand]: 282/299 looper letters, 442 selfloop transitions, 174 changer transitions 7/625 dead transitions. [2023-08-30 11:52:02,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 625 transitions, 9793 flow [2023-08-30 11:52:02,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 11:52:02,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 11:52:02,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2371 transitions. [2023-08-30 11:52:02,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3447724298385924 [2023-08-30 11:52:02,591 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2371 transitions. [2023-08-30 11:52:02,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2371 transitions. [2023-08-30 11:52:02,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:52:02,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2371 transitions. [2023-08-30 11:52:02,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 103.08695652173913) internal successors, (2371), 23 states have internal predecessors, (2371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:02,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 299.0) internal successors, (7176), 24 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:02,600 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 299.0) internal successors, (7176), 24 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:02,600 INFO L175 Difference]: Start difference. First operand has 188 places, 392 transitions, 5920 flow. Second operand 23 states and 2371 transitions. [2023-08-30 11:52:02,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 625 transitions, 9793 flow [2023-08-30 11:52:03,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 625 transitions, 9035 flow, removed 343 selfloop flow, removed 10 redundant places. [2023-08-30 11:52:03,922 INFO L231 Difference]: Finished difference. Result has 210 places, 489 transitions, 7663 flow [2023-08-30 11:52:03,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=5185, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7663, PETRI_PLACES=210, PETRI_TRANSITIONS=489} [2023-08-30 11:52:03,923 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 172 predicate places. [2023-08-30 11:52:03,923 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 489 transitions, 7663 flow [2023-08-30 11:52:03,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 95.5) internal successors, (3056), 32 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:03,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:52:03,923 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:52:03,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 11:52:04,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:52:04,124 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:52:04,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:52:04,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1822981980, now seen corresponding path program 2 times [2023-08-30 11:52:04,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:52:04,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669122527] [2023-08-30 11:52:04,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:52:04,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:52:04,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:52:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:52:04,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:52:04,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669122527] [2023-08-30 11:52:04,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669122527] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:52:04,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253582750] [2023-08-30 11:52:04,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:52:04,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:52:04,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:52:04,937 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:52:04,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 11:52:05,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:52:05,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:52:05,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 11:52:05,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:52:05,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 11:52:05,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 11:52:05,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:52:05,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:52:05,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:52:05,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:52:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:52:05,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:52:06,202 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:52:06,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-30 11:52:06,217 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:52:06,217 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 362 treesize of output 346 [2023-08-30 11:52:06,247 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:52:06,247 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 103 treesize of output 99 [2023-08-30 11:52:06,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 134 [2023-08-30 11:52:06,270 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 134 treesize of output 110 [2023-08-30 11:52:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:52:06,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253582750] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:52:06,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:52:06,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-30 11:52:06,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906040815] [2023-08-30 11:52:06,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:52:06,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 11:52:06,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:52:06,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 11:52:06,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=845, Unknown=3, NotChecked=0, Total=992 [2023-08-30 11:52:07,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 299 [2023-08-30 11:52:07,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 489 transitions, 7663 flow. Second operand has 32 states, 32 states have (on average 95.5) internal successors, (3056), 32 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:07,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:52:07,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 299 [2023-08-30 11:52:07,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:52:33,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:52:35,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:52:38,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:52:40,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:52:46,880 INFO L130 PetriNetUnfolder]: 26553/42879 cut-off events. [2023-08-30 11:52:46,880 INFO L131 PetriNetUnfolder]: For 701475/701751 co-relation queries the response was YES. [2023-08-30 11:52:47,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284577 conditions, 42879 events. 26553/42879 cut-off events. For 701475/701751 co-relation queries the response was YES. Maximal size of possible extension queue 1647. Compared 338992 event pairs, 5885 based on Foata normal form. 1676/40023 useless extension candidates. Maximal degree in co-relation 284507. Up to 29686 conditions per place. [2023-08-30 11:52:47,615 INFO L137 encePairwiseOnDemand]: 283/299 looper letters, 742 selfloop transitions, 748 changer transitions 6/1498 dead transitions. [2023-08-30 11:52:47,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 1498 transitions, 24796 flow [2023-08-30 11:52:47,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-30 11:52:47,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-30 11:52:47,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4380 transitions. [2023-08-30 11:52:47,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34878165312947923 [2023-08-30 11:52:47,621 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4380 transitions. [2023-08-30 11:52:47,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4380 transitions. [2023-08-30 11:52:47,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:52:47,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4380 transitions. [2023-08-30 11:52:47,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 104.28571428571429) internal successors, (4380), 42 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:47,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 299.0) internal successors, (12857), 43 states have internal predecessors, (12857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:47,636 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 299.0) internal successors, (12857), 43 states have internal predecessors, (12857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:47,637 INFO L175 Difference]: Start difference. First operand has 210 places, 489 transitions, 7663 flow. Second operand 42 states and 4380 transitions. [2023-08-30 11:52:47,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 1498 transitions, 24796 flow [2023-08-30 11:52:52,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 1498 transitions, 24011 flow, removed 378 selfloop flow, removed 5 redundant places. [2023-08-30 11:52:52,297 INFO L231 Difference]: Finished difference. Result has 275 places, 1123 transitions, 20832 flow [2023-08-30 11:52:52,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=6701, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=20832, PETRI_PLACES=275, PETRI_TRANSITIONS=1123} [2023-08-30 11:52:52,298 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 237 predicate places. [2023-08-30 11:52:52,298 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 1123 transitions, 20832 flow [2023-08-30 11:52:52,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 95.5) internal successors, (3056), 32 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:52,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:52:52,299 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:52:52,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 11:52:52,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:52:52,504 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:52:52,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:52:52,505 INFO L85 PathProgramCache]: Analyzing trace with hash -79925789, now seen corresponding path program 4 times [2023-08-30 11:52:52,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:52:52,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787219418] [2023-08-30 11:52:52,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:52:52,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:52:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:52:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:52:53,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:52:53,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787219418] [2023-08-30 11:52:53,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787219418] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:52:53,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301918820] [2023-08-30 11:52:53,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:52:53,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:52:53,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:52:53,411 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:52:53,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 11:52:53,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:52:53,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:52:53,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 11:52:53,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:52:53,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:52:53,688 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 30 treesize of output 30 [2023-08-30 11:52:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:52:53,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:52:55,993 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:52:55,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 79 [2023-08-30 11:52:56,024 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:52:56,024 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 19 treesize of output 6 [2023-08-30 11:52:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:52:56,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301918820] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:52:56,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:52:56,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2023-08-30 11:52:56,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030061232] [2023-08-30 11:52:56,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:52:56,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 11:52:56,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:52:56,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 11:52:56,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=611, Unknown=1, NotChecked=0, Total=702 [2023-08-30 11:52:58,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:52:58,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 299 [2023-08-30 11:52:58,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 1123 transitions, 20832 flow. Second operand has 27 states, 27 states have (on average 101.66666666666667) internal successors, (2745), 27 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:58,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:52:58,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 299 [2023-08-30 11:52:58,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:53:12,201 INFO L130 PetriNetUnfolder]: 26901/43608 cut-off events. [2023-08-30 11:53:12,201 INFO L131 PetriNetUnfolder]: For 995500/995584 co-relation queries the response was YES. [2023-08-30 11:53:13,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406471 conditions, 43608 events. 26901/43608 cut-off events. For 995500/995584 co-relation queries the response was YES. Maximal size of possible extension queue 1748. Compared 349406 event pairs, 10142 based on Foata normal form. 6/39049 useless extension candidates. Maximal degree in co-relation 406371. Up to 39157 conditions per place. [2023-08-30 11:53:13,487 INFO L137 encePairwiseOnDemand]: 290/299 looper letters, 1126 selfloop transitions, 142 changer transitions 15/1285 dead transitions. [2023-08-30 11:53:13,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 1285 transitions, 25966 flow [2023-08-30 11:53:13,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 11:53:13,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 11:53:13,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1970 transitions. [2023-08-30 11:53:13,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36603493125232256 [2023-08-30 11:53:13,490 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1970 transitions. [2023-08-30 11:53:13,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1970 transitions. [2023-08-30 11:53:13,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:53:13,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1970 transitions. [2023-08-30 11:53:13,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 109.44444444444444) internal successors, (1970), 18 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:53:13,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 299.0) internal successors, (5681), 19 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:53:13,496 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 299.0) internal successors, (5681), 19 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:53:13,496 INFO L175 Difference]: Start difference. First operand has 275 places, 1123 transitions, 20832 flow. Second operand 18 states and 1970 transitions. [2023-08-30 11:53:13,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 1285 transitions, 25966 flow [2023-08-30 11:53:27,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 1285 transitions, 22268 flow, removed 1812 selfloop flow, removed 8 redundant places. [2023-08-30 11:53:27,535 INFO L231 Difference]: Finished difference. Result has 290 places, 1170 transitions, 18726 flow [2023-08-30 11:53:27,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=17165, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1007, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=18726, PETRI_PLACES=290, PETRI_TRANSITIONS=1170} [2023-08-30 11:53:27,536 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 252 predicate places. [2023-08-30 11:53:27,537 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 1170 transitions, 18726 flow [2023-08-30 11:53:27,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 101.66666666666667) internal successors, (2745), 27 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:53:27,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:53:27,537 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:53:27,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 11:53:27,737 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,SelfDestructingSolverStorable24 [2023-08-30 11:53:27,738 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:53:27,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:53:27,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1424553256, now seen corresponding path program 3 times [2023-08-30 11:53:27,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:53:27,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671779135] [2023-08-30 11:53:27,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:53:27,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:53:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:53:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:53:28,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:53:28,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671779135] [2023-08-30 11:53:28,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671779135] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:53:28,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696266225] [2023-08-30 11:53:28,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:53:28,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:53:28,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:53:28,584 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) [2023-08-30 11:53:28,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 11:53:28,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 11:53:28,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:53:28,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 11:53:28,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:53:29,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:53:29,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:53:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:53:29,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:53:29,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:53:29,197 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 [2023-08-30 11:53:29,201 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 [2023-08-30 11:53:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:53:29,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696266225] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:53:29,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:53:29,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2023-08-30 11:53:29,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151696955] [2023-08-30 11:53:29,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:53:29,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 11:53:29,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:53:29,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 11:53:29,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=755, Unknown=1, NotChecked=0, Total=870 [2023-08-30 11:53:30,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 299 [2023-08-30 11:53:30,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 1170 transitions, 18726 flow. Second operand has 30 states, 30 states have (on average 95.6) internal successors, (2868), 30 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:53:30,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:53:30,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 299 [2023-08-30 11:53:30,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:53:39,506 INFO L130 PetriNetUnfolder]: 8381/14500 cut-off events. [2023-08-30 11:53:39,506 INFO L131 PetriNetUnfolder]: For 329123/329123 co-relation queries the response was YES. [2023-08-30 11:53:39,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125119 conditions, 14500 events. 8381/14500 cut-off events. For 329123/329123 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 113397 event pairs, 2993 based on Foata normal form. 728/13640 useless extension candidates. Maximal degree in co-relation 125019. Up to 9667 conditions per place. [2023-08-30 11:53:39,706 INFO L137 encePairwiseOnDemand]: 281/299 looper letters, 247 selfloop transitions, 44 changer transitions 205/498 dead transitions. [2023-08-30 11:53:39,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 498 transitions, 9226 flow [2023-08-30 11:53:39,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 11:53:39,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 11:53:39,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2365 transitions. [2023-08-30 11:53:39,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34389995637632687 [2023-08-30 11:53:39,709 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2365 transitions. [2023-08-30 11:53:39,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2365 transitions. [2023-08-30 11:53:39,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:53:39,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2365 transitions. [2023-08-30 11:53:39,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 102.82608695652173) internal successors, (2365), 23 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:53:39,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 299.0) internal successors, (7176), 24 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:53:39,717 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 299.0) internal successors, (7176), 24 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:53:39,717 INFO L175 Difference]: Start difference. First operand has 290 places, 1170 transitions, 18726 flow. Second operand 23 states and 2365 transitions. [2023-08-30 11:53:39,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 498 transitions, 9226 flow [2023-08-30 11:53:41,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 498 transitions, 7676 flow, removed 659 selfloop flow, removed 35 redundant places. [2023-08-30 11:53:41,730 INFO L231 Difference]: Finished difference. Result has 258 places, 243 transitions, 3640 flow [2023-08-30 11:53:41,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=5016, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3640, PETRI_PLACES=258, PETRI_TRANSITIONS=243} [2023-08-30 11:53:41,731 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 220 predicate places. [2023-08-30 11:53:41,731 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 243 transitions, 3640 flow [2023-08-30 11:53:41,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 95.6) internal successors, (2868), 30 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:53:41,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:53:41,732 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:53:41,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 11:53:41,932 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,SelfDestructingSolverStorable25 [2023-08-30 11:53:41,932 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:53:41,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:53:41,933 INFO L85 PathProgramCache]: Analyzing trace with hash -79925787, now seen corresponding path program 2 times [2023-08-30 11:53:41,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:53:41,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419690055] [2023-08-30 11:53:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:53:41,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:53:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:53:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:53:42,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:53:42,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419690055] [2023-08-30 11:53:42,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419690055] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:53:42,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992477136] [2023-08-30 11:53:42,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:53:42,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:53:42,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:53:42,865 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) [2023-08-30 11:53:42,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 11:53:42,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:53:42,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:53:42,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 11:53:42,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:53:43,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:53:43,157 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 30 treesize of output 30 [2023-08-30 11:53:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:53:43,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:53:43,333 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1099 (Array Int Int))) (< 0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1099) c_~queue~0.base)) (.cse1 (* c_~front~0 4))) (+ 2147483649 c_~d~0 (select .cse0 (+ c_~queue~0.offset .cse1 4)) (select .cse0 (+ c_~queue~0.offset .cse1)))))) is different from false [2023-08-30 11:53:43,397 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:53:43,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 81 [2023-08-30 11:53:43,404 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:53:43,404 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 20 treesize of output 7 [2023-08-30 11:53:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:53:43,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992477136] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:53:43,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:53:43,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2023-08-30 11:53:43,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108041835] [2023-08-30 11:53:43,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:53:43,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 11:53:43,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:53:43,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 11:53:43,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=570, Unknown=1, NotChecked=48, Total=702 [2023-08-30 11:53:43,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 299 [2023-08-30 11:53:43,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 243 transitions, 3640 flow. Second operand has 27 states, 27 states have (on average 101.66666666666667) internal successors, (2745), 27 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:53:43,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:53:43,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 299 [2023-08-30 11:53:43,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:53:51,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:53:53,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:53:55,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:53:57,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:53:59,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:54:01,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:54:06,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:54:08,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:54:10,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:54:11,214 INFO L130 PetriNetUnfolder]: 7124/11609 cut-off events. [2023-08-30 11:54:11,214 INFO L131 PetriNetUnfolder]: For 283009/283009 co-relation queries the response was YES. [2023-08-30 11:54:11,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98676 conditions, 11609 events. 7124/11609 cut-off events. For 283009/283009 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 78057 event pairs, 1444 based on Foata normal form. 199/10495 useless extension candidates. Maximal degree in co-relation 98596. Up to 8029 conditions per place. [2023-08-30 11:54:11,353 INFO L137 encePairwiseOnDemand]: 285/299 looper letters, 261 selfloop transitions, 191 changer transitions 16/470 dead transitions. [2023-08-30 11:54:11,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 470 transitions, 8098 flow [2023-08-30 11:54:11,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 11:54:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 11:54:11,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2956 transitions. [2023-08-30 11:54:11,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3661588009414096 [2023-08-30 11:54:11,357 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2956 transitions. [2023-08-30 11:54:11,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2956 transitions. [2023-08-30 11:54:11,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:54:11,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2956 transitions. [2023-08-30 11:54:11,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 109.48148148148148) internal successors, (2956), 27 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:11,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 299.0) internal successors, (8372), 28 states have internal predecessors, (8372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:11,366 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 299.0) internal successors, (8372), 28 states have internal predecessors, (8372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:11,367 INFO L175 Difference]: Start difference. First operand has 258 places, 243 transitions, 3640 flow. Second operand 27 states and 2956 transitions. [2023-08-30 11:54:11,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 470 transitions, 8098 flow [2023-08-30 11:54:12,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 470 transitions, 7386 flow, removed 281 selfloop flow, removed 29 redundant places. [2023-08-30 11:54:12,011 INFO L231 Difference]: Finished difference. Result has 224 places, 314 transitions, 5591 flow [2023-08-30 11:54:12,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=3311, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5591, PETRI_PLACES=224, PETRI_TRANSITIONS=314} [2023-08-30 11:54:12,011 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 186 predicate places. [2023-08-30 11:54:12,011 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 314 transitions, 5591 flow [2023-08-30 11:54:12,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 101.66666666666667) internal successors, (2745), 27 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:12,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:54:12,012 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:54:12,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 11:54:12,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-30 11:54:12,213 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:54:12,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:54:12,213 INFO L85 PathProgramCache]: Analyzing trace with hash 927516208, now seen corresponding path program 2 times [2023-08-30 11:54:12,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:54:12,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020185625] [2023-08-30 11:54:12,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:54:12,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:54:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:54:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:54:12,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:54:12,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020185625] [2023-08-30 11:54:12,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020185625] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:54:12,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506157182] [2023-08-30 11:54:12,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:54:12,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:54:12,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:54:12,839 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) [2023-08-30 11:54:12,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 11:54:12,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:54:12,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:54:12,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 11:54:12,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:54:13,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 11:54:13,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 11:54:13,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 11:54:13,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:54:13,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-30 11:54:13,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:54:13,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-30 11:54:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:54:13,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:54:14,296 INFO L321 Elim1Store]: treesize reduction 16, result has 65.2 percent of original size [2023-08-30 11:54:14,297 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 151 treesize of output 104 [2023-08-30 11:54:14,397 INFO L321 Elim1Store]: treesize reduction 8, result has 89.9 percent of original size [2023-08-30 11:54:14,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 16109 treesize of output 14555 [2023-08-30 11:54:14,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:54:14,785 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 252 treesize of output 210 [2023-08-30 11:54:14,835 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 11:54:14,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 319 treesize of output 324 [2023-08-30 11:54:14,879 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-08-30 11:54:14,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 270 treesize of output 240 [2023-08-30 11:54:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:54:16,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506157182] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:54:16,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:54:16,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-08-30 11:54:16,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595821215] [2023-08-30 11:54:16,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:54:16,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 11:54:16,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:54:16,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 11:54:16,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=791, Unknown=5, NotChecked=0, Total=930 [2023-08-30 11:54:17,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 299 [2023-08-30 11:54:17,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 314 transitions, 5591 flow. Second operand has 31 states, 31 states have (on average 95.54838709677419) internal successors, (2962), 31 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:17,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:54:17,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 299 [2023-08-30 11:54:17,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:54:24,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:54:26,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:54:28,345 INFO L130 PetriNetUnfolder]: 7066/11585 cut-off events. [2023-08-30 11:54:28,346 INFO L131 PetriNetUnfolder]: For 276013/276013 co-relation queries the response was YES. [2023-08-30 11:54:28,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109066 conditions, 11585 events. 7066/11585 cut-off events. For 276013/276013 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 79153 event pairs, 3416 based on Foata normal form. 68/10336 useless extension candidates. Maximal degree in co-relation 108992. Up to 9160 conditions per place. [2023-08-30 11:54:28,489 INFO L137 encePairwiseOnDemand]: 291/299 looper letters, 328 selfloop transitions, 44 changer transitions 42/416 dead transitions. [2023-08-30 11:54:28,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 416 transitions, 7776 flow [2023-08-30 11:54:28,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 11:54:28,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 11:54:28,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2126 transitions. [2023-08-30 11:54:28,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3385889472845995 [2023-08-30 11:54:28,491 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2126 transitions. [2023-08-30 11:54:28,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2126 transitions. [2023-08-30 11:54:28,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:54:28,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2126 transitions. [2023-08-30 11:54:28,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 101.23809523809524) internal successors, (2126), 21 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:28,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 299.0) internal successors, (6578), 22 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:28,499 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 299.0) internal successors, (6578), 22 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:28,499 INFO L175 Difference]: Start difference. First operand has 224 places, 314 transitions, 5591 flow. Second operand 21 states and 2126 transitions. [2023-08-30 11:54:28,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 416 transitions, 7776 flow [2023-08-30 11:54:29,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 416 transitions, 6556 flow, removed 529 selfloop flow, removed 18 redundant places. [2023-08-30 11:54:29,430 INFO L231 Difference]: Finished difference. Result has 225 places, 300 transitions, 4243 flow [2023-08-30 11:54:29,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=4261, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4243, PETRI_PLACES=225, PETRI_TRANSITIONS=300} [2023-08-30 11:54:29,431 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 187 predicate places. [2023-08-30 11:54:29,431 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 300 transitions, 4243 flow [2023-08-30 11:54:29,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 95.54838709677419) internal successors, (2962), 31 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:29,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:54:29,432 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:54:29,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 11:54:29,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:54:29,639 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:54:29,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:54:29,639 INFO L85 PathProgramCache]: Analyzing trace with hash 921803635, now seen corresponding path program 3 times [2023-08-30 11:54:29,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:54:29,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194163360] [2023-08-30 11:54:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:54:29,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:54:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:54:30,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:54:30,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:54:30,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194163360] [2023-08-30 11:54:30,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194163360] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:54:30,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326940555] [2023-08-30 11:54:30,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:54:30,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:54:30,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:54:30,715 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) [2023-08-30 11:54:30,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 11:54:30,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 11:54:30,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:54:30,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 11:54:30,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:54:31,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:54:31,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:54:31,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-08-30 11:54:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:54:31,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:54:31,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:54:31,166 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 18 [2023-08-30 11:54:31,265 WARN L839 $PredicateComparison]: unable to prove that (and (= (+ c_~front~0 1) c_~back~0) (forall ((v_ArrVal_1207 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1207) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483647))) is different from false [2023-08-30 11:54:31,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:54:31,278 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 51 treesize of output 43 [2023-08-30 11:54:31,283 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 [2023-08-30 11:54:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:54:31,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326940555] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:54:31,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:54:31,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 24 [2023-08-30 11:54:31,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213583481] [2023-08-30 11:54:31,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:54:31,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 11:54:31,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:54:31,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 11:54:31,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=511, Unknown=1, NotChecked=46, Total=650 [2023-08-30 11:54:31,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 299 [2023-08-30 11:54:31,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 300 transitions, 4243 flow. Second operand has 26 states, 26 states have (on average 101.8076923076923) internal successors, (2647), 26 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:31,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:54:31,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 299 [2023-08-30 11:54:31,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:54:34,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:54:36,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:54:38,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:54:40,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:54:42,635 INFO L130 PetriNetUnfolder]: 7929/12905 cut-off events. [2023-08-30 11:54:42,635 INFO L131 PetriNetUnfolder]: For 253573/253759 co-relation queries the response was YES. [2023-08-30 11:54:42,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115039 conditions, 12905 events. 7929/12905 cut-off events. For 253573/253759 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 85465 event pairs, 1888 based on Foata normal form. 184/11435 useless extension candidates. Maximal degree in co-relation 114966. Up to 8666 conditions per place. [2023-08-30 11:54:42,764 INFO L137 encePairwiseOnDemand]: 284/299 looper letters, 342 selfloop transitions, 203 changer transitions 31/578 dead transitions. [2023-08-30 11:54:42,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 578 transitions, 9736 flow [2023-08-30 11:54:42,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 11:54:42,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 11:54:42,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3385 transitions. [2023-08-30 11:54:42,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36519581400366813 [2023-08-30 11:54:42,770 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3385 transitions. [2023-08-30 11:54:42,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3385 transitions. [2023-08-30 11:54:42,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:54:42,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3385 transitions. [2023-08-30 11:54:42,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 109.19354838709677) internal successors, (3385), 31 states have internal predecessors, (3385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:42,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 299.0) internal successors, (9568), 32 states have internal predecessors, (9568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:42,780 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 299.0) internal successors, (9568), 32 states have internal predecessors, (9568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:42,780 INFO L175 Difference]: Start difference. First operand has 225 places, 300 transitions, 4243 flow. Second operand 31 states and 3385 transitions. [2023-08-30 11:54:42,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 578 transitions, 9736 flow [2023-08-30 11:54:43,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 578 transitions, 9599 flow, removed 25 selfloop flow, removed 14 redundant places. [2023-08-30 11:54:43,306 INFO L231 Difference]: Finished difference. Result has 245 places, 399 transitions, 6688 flow [2023-08-30 11:54:43,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=4061, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=6688, PETRI_PLACES=245, PETRI_TRANSITIONS=399} [2023-08-30 11:54:43,309 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 207 predicate places. [2023-08-30 11:54:43,309 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 399 transitions, 6688 flow [2023-08-30 11:54:43,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 101.8076923076923) internal successors, (2647), 26 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:43,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:54:43,310 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:54:43,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 11:54:43,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 11:54:43,515 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:54:43,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:54:43,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1424350518, now seen corresponding path program 4 times [2023-08-30 11:54:43,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:54:43,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756849271] [2023-08-30 11:54:43,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:54:43,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:54:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:54:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:54:44,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:54:44,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756849271] [2023-08-30 11:54:44,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756849271] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:54:44,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985132492] [2023-08-30 11:54:44,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:54:44,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:54:44,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:54:44,217 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) [2023-08-30 11:54:44,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 11:54:44,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:54:44,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:54:44,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-30 11:54:44,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:54:44,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:54:44,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:54:44,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-08-30 11:54:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:54:44,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:54:44,837 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:54:44,838 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 [2023-08-30 11:54:45,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:54:45,162 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 84 treesize of output 76 [2023-08-30 11:54:45,167 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 63 treesize of output 57 [2023-08-30 11:54:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:54:45,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985132492] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:54:45,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:54:45,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 11:54:45,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455374818] [2023-08-30 11:54:45,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:54:45,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 11:54:45,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:54:45,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 11:54:45,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2023-08-30 11:54:46,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 299 [2023-08-30 11:54:46,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 399 transitions, 6688 flow. Second operand has 29 states, 29 states have (on average 114.65517241379311) internal successors, (3325), 29 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:46,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:54:46,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 299 [2023-08-30 11:54:46,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:54:50,130 INFO L130 PetriNetUnfolder]: 7905/13055 cut-off events. [2023-08-30 11:54:50,130 INFO L131 PetriNetUnfolder]: For 312715/312715 co-relation queries the response was YES. [2023-08-30 11:54:50,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129088 conditions, 13055 events. 7905/13055 cut-off events. For 312715/312715 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 89083 event pairs, 3956 based on Foata normal form. 41/11503 useless extension candidates. Maximal degree in co-relation 129009. Up to 11082 conditions per place. [2023-08-30 11:54:50,281 INFO L137 encePairwiseOnDemand]: 291/299 looper letters, 392 selfloop transitions, 40 changer transitions 27/461 dead transitions. [2023-08-30 11:54:50,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 461 transitions, 8586 flow [2023-08-30 11:54:50,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 11:54:50,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 11:54:50,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1913 transitions. [2023-08-30 11:54:50,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39987458193979936 [2023-08-30 11:54:50,284 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1913 transitions. [2023-08-30 11:54:50,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1913 transitions. [2023-08-30 11:54:50,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:54:50,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1913 transitions. [2023-08-30 11:54:50,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 119.5625) internal successors, (1913), 16 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:50,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 299.0) internal successors, (5083), 17 states have internal predecessors, (5083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:50,289 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 299.0) internal successors, (5083), 17 states have internal predecessors, (5083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:50,289 INFO L175 Difference]: Start difference. First operand has 245 places, 399 transitions, 6688 flow. Second operand 16 states and 1913 transitions. [2023-08-30 11:54:50,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 461 transitions, 8586 flow [2023-08-30 11:54:51,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 461 transitions, 7535 flow, removed 473 selfloop flow, removed 12 redundant places. [2023-08-30 11:54:51,237 INFO L231 Difference]: Finished difference. Result has 247 places, 392 transitions, 5610 flow [2023-08-30 11:54:51,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=5582, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5610, PETRI_PLACES=247, PETRI_TRANSITIONS=392} [2023-08-30 11:54:51,238 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 209 predicate places. [2023-08-30 11:54:51,238 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 392 transitions, 5610 flow [2023-08-30 11:54:51,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 114.65517241379311) internal successors, (3325), 29 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:51,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:54:51,238 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:54:51,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-30 11:54:51,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:54:51,439 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:54:51,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:54:51,439 INFO L85 PathProgramCache]: Analyzing trace with hash -11117340, now seen corresponding path program 5 times [2023-08-30 11:54:51,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:54:51,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549361503] [2023-08-30 11:54:51,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:54:51,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:54:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:54:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:54:52,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:54:52,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549361503] [2023-08-30 11:54:52,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549361503] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:54:52,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123047434] [2023-08-30 11:54:52,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:54:52,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:54:52,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:54:52,073 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) [2023-08-30 11:54:52,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 11:54:52,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:54:52,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:54:52,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 11:54:52,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:54:52,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:54:52,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:54:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:54:52,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:54:52,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:54:52,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 100 [2023-08-30 11:54:52,587 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:54:52,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 47 [2023-08-30 11:54:52,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:54:52,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123047434] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:54:52,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:54:52,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2023-08-30 11:54:52,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357788179] [2023-08-30 11:54:52,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:54:52,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 11:54:52,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:54:52,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 11:54:52,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=525, Unknown=4, NotChecked=0, Total=600 [2023-08-30 11:54:53,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 299 [2023-08-30 11:54:53,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 392 transitions, 5610 flow. Second operand has 25 states, 25 states have (on average 101.84) internal successors, (2546), 25 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:53,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:54:53,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 299 [2023-08-30 11:54:53,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:54:56,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:55:03,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:55:05,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:55:07,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:55:10,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:55:12,884 INFO L130 PetriNetUnfolder]: 11300/18377 cut-off events. [2023-08-30 11:55:12,884 INFO L131 PetriNetUnfolder]: For 514980/515178 co-relation queries the response was YES. [2023-08-30 11:55:13,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184444 conditions, 18377 events. 11300/18377 cut-off events. For 514980/515178 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 131212 event pairs, 2508 based on Foata normal form. 379/16716 useless extension candidates. Maximal degree in co-relation 184364. Up to 12138 conditions per place. [2023-08-30 11:55:13,091 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 468 selfloop transitions, 188 changer transitions 53/711 dead transitions. [2023-08-30 11:55:13,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 711 transitions, 12396 flow [2023-08-30 11:55:13,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 11:55:13,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 11:55:13,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3185 transitions. [2023-08-30 11:55:13,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36731634182908546 [2023-08-30 11:55:13,094 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3185 transitions. [2023-08-30 11:55:13,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3185 transitions. [2023-08-30 11:55:13,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:55:13,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3185 transitions. [2023-08-30 11:55:13,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 109.82758620689656) internal successors, (3185), 29 states have internal predecessors, (3185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:13,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 299.0) internal successors, (8970), 30 states have internal predecessors, (8970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:13,100 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 299.0) internal successors, (8970), 30 states have internal predecessors, (8970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:13,100 INFO L175 Difference]: Start difference. First operand has 247 places, 392 transitions, 5610 flow. Second operand 29 states and 3185 transitions. [2023-08-30 11:55:13,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 711 transitions, 12396 flow [2023-08-30 11:55:14,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 711 transitions, 12078 flow, removed 128 selfloop flow, removed 12 redundant places. [2023-08-30 11:55:14,133 INFO L231 Difference]: Finished difference. Result has 277 places, 471 transitions, 8015 flow [2023-08-30 11:55:14,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=5492, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8015, PETRI_PLACES=277, PETRI_TRANSITIONS=471} [2023-08-30 11:55:14,134 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 239 predicate places. [2023-08-30 11:55:14,134 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 471 transitions, 8015 flow [2023-08-30 11:55:14,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 101.84) internal successors, (2546), 25 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:14,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:55:14,134 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:55:14,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 11:55:14,340 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,SelfDestructingSolverStorable30 [2023-08-30 11:55:14,340 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:55:14,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:55:14,340 INFO L85 PathProgramCache]: Analyzing trace with hash 929522537, now seen corresponding path program 4 times [2023-08-30 11:55:14,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:55:14,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551801432] [2023-08-30 11:55:14,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:55:14,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:55:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:55:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:55:14,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:55:14,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551801432] [2023-08-30 11:55:14,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551801432] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:55:14,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448327255] [2023-08-30 11:55:14,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:55:14,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:55:14,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:55:14,949 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) [2023-08-30 11:55:15,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 11:55:15,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:55:15,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:55:15,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 11:55:15,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:55:15,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:55:15,486 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 30 treesize of output 30 [2023-08-30 11:55:15,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:55:15,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:55:15,539 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1358 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1358) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 2147483649 c_~d~0))) is different from false [2023-08-30 11:55:15,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:55:15,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 75 [2023-08-30 11:55:15,677 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 18 treesize of output 11 [2023-08-30 11:55:15,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:55:15,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448327255] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:55:15,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:55:15,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 26 [2023-08-30 11:55:15,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556624562] [2023-08-30 11:55:15,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:55:15,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 11:55:15,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:55:15,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 11:55:15,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=4, NotChecked=50, Total=756 [2023-08-30 11:55:15,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 299 [2023-08-30 11:55:15,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 471 transitions, 8015 flow. Second operand has 28 states, 28 states have (on average 101.75) internal successors, (2849), 28 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:15,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:55:15,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 299 [2023-08-30 11:55:15,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:55:21,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:55:30,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:55:35,874 INFO L130 PetriNetUnfolder]: 15968/25640 cut-off events. [2023-08-30 11:55:35,874 INFO L131 PetriNetUnfolder]: For 1016834/1017038 co-relation queries the response was YES. [2023-08-30 11:55:36,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273749 conditions, 25640 events. 15968/25640 cut-off events. For 1016834/1017038 co-relation queries the response was YES. Maximal size of possible extension queue 1105. Compared 188286 event pairs, 2885 based on Foata normal form. 898/23691 useless extension candidates. Maximal degree in co-relation 273654. Up to 17499 conditions per place. [2023-08-30 11:55:36,654 INFO L137 encePairwiseOnDemand]: 282/299 looper letters, 541 selfloop transitions, 455 changer transitions 32/1030 dead transitions. [2023-08-30 11:55:36,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 1030 transitions, 20958 flow [2023-08-30 11:55:36,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-30 11:55:36,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-30 11:55:36,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 4172 transitions. [2023-08-30 11:55:36,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3671888751980285 [2023-08-30 11:55:36,658 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 4172 transitions. [2023-08-30 11:55:36,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 4172 transitions. [2023-08-30 11:55:36,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:55:36,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 4172 transitions. [2023-08-30 11:55:36,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 109.78947368421052) internal successors, (4172), 38 states have internal predecessors, (4172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:36,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 299.0) internal successors, (11661), 39 states have internal predecessors, (11661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:36,671 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 299.0) internal successors, (11661), 39 states have internal predecessors, (11661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:36,671 INFO L175 Difference]: Start difference. First operand has 277 places, 471 transitions, 8015 flow. Second operand 38 states and 4172 transitions. [2023-08-30 11:55:36,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 1030 transitions, 20958 flow [2023-08-30 11:55:40,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 1030 transitions, 19398 flow, removed 750 selfloop flow, removed 15 redundant places. [2023-08-30 11:55:40,097 INFO L231 Difference]: Finished difference. Result has 311 places, 748 transitions, 15294 flow [2023-08-30 11:55:40,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=7052, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=15294, PETRI_PLACES=311, PETRI_TRANSITIONS=748} [2023-08-30 11:55:40,098 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 273 predicate places. [2023-08-30 11:55:40,098 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 748 transitions, 15294 flow [2023-08-30 11:55:40,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 101.75) internal successors, (2849), 28 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:40,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:55:40,099 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:55:40,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 11:55:40,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:55:40,300 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:55:40,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:55:40,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1817385657, now seen corresponding path program 5 times [2023-08-30 11:55:40,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:55:40,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316833667] [2023-08-30 11:55:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:55:40,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:55:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:55:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:55:41,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:55:41,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316833667] [2023-08-30 11:55:41,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316833667] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:55:41,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981860233] [2023-08-30 11:55:41,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:55:41,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:55:41,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:55:41,488 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) [2023-08-30 11:55:41,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 11:55:41,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 11:55:41,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:55:41,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 11:55:41,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:55:41,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:55:41,848 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 30 treesize of output 30 [2023-08-30 11:55:41,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:55:41,987 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 30 treesize of output 30 [2023-08-30 11:55:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:55:42,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:55:42,074 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1412 (Array Int Int))) (< 0 (+ 2147483649 c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1412) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))))) is different from false [2023-08-30 11:55:42,080 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1412 (Array Int Int))) (< 0 (+ |c_thread2Thread1of1ForFork1_~temp~0#1| 2147483649 c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1412) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))))) is different from false [2023-08-30 11:55:42,086 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1412 (Array Int Int))) (< 0 (let ((.cse0 (* c_~front~0 4))) (+ 2147483649 c_~d~0 (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset .cse0)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1412) c_~queue~0.base) (+ c_~queue~0.offset .cse0 4)))))) is different from false [2023-08-30 11:55:42,104 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1412 (Array Int Int)) (v_ArrVal_1411 (Array Int Int))) (< 0 (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1411)) (.cse1 (* c_~front~0 4))) (+ (select (select .cse0 c_~queue~0.base) (+ c_~queue~0.offset .cse1)) 2147483649 c_~d~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1412) c_~queue~0.base) (+ c_~queue~0.offset .cse1 4)))))) is different from false [2023-08-30 11:55:42,173 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:55:42,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 267 treesize of output 236 [2023-08-30 11:55:42,180 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 91 treesize of output 77 [2023-08-30 11:55:42,186 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:55:42,187 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 47 treesize of output 28 [2023-08-30 11:55:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-08-30 11:55:42,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981860233] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:55:42,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:55:42,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 29 [2023-08-30 11:55:42,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597071006] [2023-08-30 11:55:42,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:55:42,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 11:55:42,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:55:42,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 11:55:42,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=626, Unknown=4, NotChecked=212, Total=930 [2023-08-30 11:55:42,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 299 [2023-08-30 11:55:42,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 748 transitions, 15294 flow. Second operand has 31 states, 31 states have (on average 95.58064516129032) internal successors, (2963), 31 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:42,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:55:42,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 299 [2023-08-30 11:55:42,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:55:44,792 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_1412 (Array Int Int)) (v_ArrVal_1411 (Array Int Int))) (< 0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1411)) (.cse2 (* c_~front~0 4))) (+ (select (select .cse1 c_~queue~0.base) (+ c_~queue~0.offset .cse2)) 2147483649 c_~d~0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1412) c_~queue~0.base) (+ c_~queue~0.offset .cse2 4)))))))) (and .cse0 (or .cse0 (not (= (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1))))) is different from false [2023-08-30 11:55:52,038 INFO L130 PetriNetUnfolder]: 17769/28527 cut-off events. [2023-08-30 11:55:52,038 INFO L131 PetriNetUnfolder]: For 1297662/1297662 co-relation queries the response was YES. [2023-08-30 11:55:52,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353780 conditions, 28527 events. 17769/28527 cut-off events. For 1297662/1297662 co-relation queries the response was YES. Maximal size of possible extension queue 1224. Compared 211944 event pairs, 3116 based on Foata normal form. 219/25730 useless extension candidates. Maximal degree in co-relation 353670. Up to 19428 conditions per place. [2023-08-30 11:55:52,728 INFO L137 encePairwiseOnDemand]: 285/299 looper letters, 598 selfloop transitions, 405 changer transitions 16/1021 dead transitions. [2023-08-30 11:55:52,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 1021 transitions, 24055 flow [2023-08-30 11:55:52,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 11:55:52,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 11:55:52,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2376 transitions. [2023-08-30 11:55:52,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.345499491057147 [2023-08-30 11:55:52,730 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2376 transitions. [2023-08-30 11:55:52,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2376 transitions. [2023-08-30 11:55:52,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:55:52,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2376 transitions. [2023-08-30 11:55:52,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 103.30434782608695) internal successors, (2376), 23 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:52,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 299.0) internal successors, (7176), 24 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:52,736 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 299.0) internal successors, (7176), 24 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:52,736 INFO L175 Difference]: Start difference. First operand has 311 places, 748 transitions, 15294 flow. Second operand 23 states and 2376 transitions. [2023-08-30 11:55:52,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 1021 transitions, 24055 flow [2023-08-30 11:56:02,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 1021 transitions, 20621 flow, removed 1679 selfloop flow, removed 11 redundant places. [2023-08-30 11:56:02,855 INFO L231 Difference]: Finished difference. Result has 330 places, 870 transitions, 17397 flow [2023-08-30 11:56:02,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=12965, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=17397, PETRI_PLACES=330, PETRI_TRANSITIONS=870} [2023-08-30 11:56:02,856 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 292 predicate places. [2023-08-30 11:56:02,857 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 870 transitions, 17397 flow [2023-08-30 11:56:02,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 95.58064516129032) internal successors, (2963), 31 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:56:02,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:56:02,857 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:56:02,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 11:56:03,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:56:03,062 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:56:03,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:56:03,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1547228211, now seen corresponding path program 6 times [2023-08-30 11:56:03,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:56:03,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161267446] [2023-08-30 11:56:03,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:56:03,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:56:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:56:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:56:04,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:56:04,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161267446] [2023-08-30 11:56:04,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161267446] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:56:04,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794910416] [2023-08-30 11:56:04,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:56:04,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:56:04,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:56:04,046 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) [2023-08-30 11:56:04,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 11:56:04,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 11:56:04,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:56:04,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 11:56:04,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:56:04,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:56:04,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:56:04,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:56:04,533 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 30 treesize of output 30 [2023-08-30 11:56:04,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:56:04,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:56:04,757 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1466 (Array Int Int)) (v_ArrVal_1465 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1465))) (let ((.cse2 (select .cse0 c_~queue~0.base))) (or (< (let ((.cse1 (* c_~front~0 4))) (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1466) c_~queue~0.base) (+ c_~queue~0.offset .cse1 4)) (select .cse2 (+ c_~queue~0.offset .cse1)) c_~d~0)) 2147483648) (not (= (select .cse2 (+ c_~queue~0.offset (* c_~back~0 4))) 1)))))) is different from false [2023-08-30 11:56:04,781 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:56:04,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 280 treesize of output 249 [2023-08-30 11:56:04,788 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 87 treesize of output 73 [2023-08-30 11:56:04,801 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:56:04,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 63 [2023-08-30 11:56:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:56:05,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794910416] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:56:05,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:56:05,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 29 [2023-08-30 11:56:05,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688535007] [2023-08-30 11:56:05,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:56:05,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 11:56:05,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:56:05,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 11:56:05,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=770, Unknown=5, NotChecked=56, Total=930 [2023-08-30 11:56:05,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 299 [2023-08-30 11:56:05,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 870 transitions, 17397 flow. Second operand has 31 states, 31 states have (on average 98.58064516129032) internal successors, (3056), 31 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:56:05,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:56:05,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 299 [2023-08-30 11:56:05,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:56:09,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:56:12,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:56:14,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:56:24,358 INFO L130 PetriNetUnfolder]: 21616/34130 cut-off events. [2023-08-30 11:56:24,358 INFO L131 PetriNetUnfolder]: For 1564774/1564786 co-relation queries the response was YES. [2023-08-30 11:56:25,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443509 conditions, 34130 events. 21616/34130 cut-off events. For 1564774/1564786 co-relation queries the response was YES. Maximal size of possible extension queue 1331. Compared 253850 event pairs, 3447 based on Foata normal form. 786/31429 useless extension candidates. Maximal degree in co-relation 443392. Up to 22654 conditions per place. [2023-08-30 11:56:25,393 INFO L137 encePairwiseOnDemand]: 284/299 looper letters, 681 selfloop transitions, 561 changer transitions 43/1287 dead transitions. [2023-08-30 11:56:25,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 1287 transitions, 29364 flow [2023-08-30 11:56:25,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 11:56:25,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 11:56:25,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3289 transitions. [2023-08-30 11:56:25,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2023-08-30 11:56:25,397 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3289 transitions. [2023-08-30 11:56:25,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3289 transitions. [2023-08-30 11:56:25,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:56:25,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3289 transitions. [2023-08-30 11:56:25,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 106.09677419354838) internal successors, (3289), 31 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:56:25,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 299.0) internal successors, (9568), 32 states have internal predecessors, (9568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:56:25,406 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 299.0) internal successors, (9568), 32 states have internal predecessors, (9568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:56:25,407 INFO L175 Difference]: Start difference. First operand has 330 places, 870 transitions, 17397 flow. Second operand 31 states and 3289 transitions. [2023-08-30 11:56:25,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 1287 transitions, 29364 flow [2023-08-30 11:56:32,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1287 transitions, 27734 flow, removed 785 selfloop flow, removed 10 redundant places. [2023-08-30 11:56:32,202 INFO L231 Difference]: Finished difference. Result has 359 places, 1024 transitions, 22005 flow [2023-08-30 11:56:32,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=15609, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=22005, PETRI_PLACES=359, PETRI_TRANSITIONS=1024} [2023-08-30 11:56:32,203 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 321 predicate places. [2023-08-30 11:56:32,203 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 1024 transitions, 22005 flow [2023-08-30 11:56:32,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 98.58064516129032) internal successors, (3056), 31 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:56:32,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:56:32,204 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:56:32,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-08-30 11:56:32,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:56:32,404 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:56:32,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:56:32,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1790167468, now seen corresponding path program 7 times [2023-08-30 11:56:32,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:56:32,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473093719] [2023-08-30 11:56:32,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:56:32,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:56:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:56:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:56:33,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:56:33,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473093719] [2023-08-30 11:56:33,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473093719] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:56:33,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732199827] [2023-08-30 11:56:33,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:56:33,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:56:33,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:56:33,280 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) [2023-08-30 11:56:33,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 11:56:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:56:33,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 11:56:33,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:56:33,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:56:33,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:56:33,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:56:33,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:56:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:56:33,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:56:33,817 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1516 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1516) c_~queue~0.base))) (or (< (let ((.cse1 (* c_~front~0 4))) (+ c_~d~0 (select .cse0 (+ c_~queue~0.offset .cse1 4)) (select .cse0 (+ c_~queue~0.offset .cse1)))) 2147483648) (not (= (select .cse0 (+ c_~queue~0.offset (* c_~back~0 4))) 1))))) is different from false [2023-08-30 11:56:33,840 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1516 (Array Int Int)) (v_ArrVal_1515 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1515) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1516) c_~queue~0.base))) (or (< (let ((.cse1 (* c_~front~0 4))) (+ (select .cse0 (+ c_~queue~0.offset .cse1 4)) c_~d~0 (select .cse0 (+ c_~queue~0.offset .cse1)))) 2147483648) (not (= (select .cse0 (+ c_~queue~0.offset (* c_~back~0 4))) 1))))) is different from false [2023-08-30 11:56:33,865 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:56:33,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 404 treesize of output 380 [2023-08-30 11:56:33,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:56:33,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 106 [2023-08-30 11:56:33,901 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:56:33,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 91 [2023-08-30 11:56:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-30 11:56:34,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732199827] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:56:34,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:56:34,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 27 [2023-08-30 11:56:34,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686273845] [2023-08-30 11:56:34,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:56:34,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 11:56:34,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:56:34,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 11:56:34,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=622, Unknown=2, NotChecked=102, Total=812 [2023-08-30 11:56:34,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 299 [2023-08-30 11:56:34,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 1024 transitions, 22005 flow. Second operand has 29 states, 29 states have (on average 98.62068965517241) internal successors, (2860), 29 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:56:34,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:56:34,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 299 [2023-08-30 11:56:34,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:56:49,146 INFO L130 PetriNetUnfolder]: 24739/39469 cut-off events. [2023-08-30 11:56:49,146 INFO L131 PetriNetUnfolder]: For 2585725/2586497 co-relation queries the response was YES. [2023-08-30 11:56:50,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563569 conditions, 39469 events. 24739/39469 cut-off events. For 2585725/2586497 co-relation queries the response was YES. Maximal size of possible extension queue 1642. Compared 306295 event pairs, 4850 based on Foata normal form. 347/38950 useless extension candidates. Maximal degree in co-relation 563443. Up to 25428 conditions per place. [2023-08-30 11:56:50,600 INFO L137 encePairwiseOnDemand]: 284/299 looper letters, 741 selfloop transitions, 508 changer transitions 66/1317 dead transitions. [2023-08-30 11:56:50,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1317 transitions, 32149 flow [2023-08-30 11:56:50,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 11:56:50,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 11:56:50,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2543 transitions. [2023-08-30 11:56:50,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3543756967670011 [2023-08-30 11:56:50,603 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2543 transitions. [2023-08-30 11:56:50,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2543 transitions. [2023-08-30 11:56:50,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:56:50,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2543 transitions. [2023-08-30 11:56:50,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 105.95833333333333) internal successors, (2543), 24 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:56:50,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 299.0) internal successors, (7475), 25 states have internal predecessors, (7475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:56:50,611 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 299.0) internal successors, (7475), 25 states have internal predecessors, (7475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:56:50,612 INFO L175 Difference]: Start difference. First operand has 359 places, 1024 transitions, 22005 flow. Second operand 24 states and 2543 transitions. [2023-08-30 11:56:50,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1317 transitions, 32149 flow [2023-08-30 11:57:03,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 1317 transitions, 30066 flow, removed 949 selfloop flow, removed 22 redundant places. [2023-08-30 11:57:03,439 INFO L231 Difference]: Finished difference. Result has 352 places, 1108 transitions, 24964 flow [2023-08-30 11:57:03,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=20556, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1018, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=24964, PETRI_PLACES=352, PETRI_TRANSITIONS=1108} [2023-08-30 11:57:03,441 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 314 predicate places. [2023-08-30 11:57:03,441 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 1108 transitions, 24964 flow [2023-08-30 11:57:03,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 98.62068965517241) internal successors, (2860), 29 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:57:03,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:57:03,442 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:57:03,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 11:57:03,647 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,SelfDestructingSolverStorable34 [2023-08-30 11:57:03,647 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:57:03,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:57:03,647 INFO L85 PathProgramCache]: Analyzing trace with hash 2016181965, now seen corresponding path program 8 times [2023-08-30 11:57:03,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:57:03,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761698637] [2023-08-30 11:57:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:57:03,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:57:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:57:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:57:04,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:57:04,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761698637] [2023-08-30 11:57:04,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761698637] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:57:04,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549191986] [2023-08-30 11:57:04,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:57:04,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:57:04,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:57:04,400 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) [2023-08-30 11:57:04,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 11:57:04,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:57:04,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:57:04,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 11:57:04,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:57:04,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:57:04,794 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 30 treesize of output 30 [2023-08-30 11:57:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:57:04,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:57:04,846 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1569 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1569) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)) is different from false [2023-08-30 11:57:04,886 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1569 (Array Int Int))) (< (let ((.cse0 (* c_~front~0 4))) (+ c_~d~0 (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset .cse0)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1569) c_~queue~0.base) (+ c_~queue~0.offset .cse0 4)))) 2147483648)) is different from false [2023-08-30 11:57:04,944 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:57:04,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 73 [2023-08-30 11:57:04,949 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 17 treesize of output 10 [2023-08-30 11:57:05,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-08-30 11:57:05,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549191986] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:57:05,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:57:05,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 26 [2023-08-30 11:57:05,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142151922] [2023-08-30 11:57:05,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:57:05,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 11:57:05,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:57:05,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 11:57:05,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=562, Unknown=9, NotChecked=98, Total=756 [2023-08-30 11:57:05,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 299 [2023-08-30 11:57:05,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 1108 transitions, 24964 flow. Second operand has 28 states, 28 states have (on average 101.75) internal successors, (2849), 28 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:57:05,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:57:05,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 299 [2023-08-30 11:57:05,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:57:19,583 INFO L130 PetriNetUnfolder]: 24786/39468 cut-off events. [2023-08-30 11:57:19,584 INFO L131 PetriNetUnfolder]: For 2199226/2199824 co-relation queries the response was YES. [2023-08-30 11:57:20,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532119 conditions, 39468 events. 24786/39468 cut-off events. For 2199226/2199824 co-relation queries the response was YES. Maximal size of possible extension queue 1701. Compared 307817 event pairs, 7608 based on Foata normal form. 76/38689 useless extension candidates. Maximal degree in co-relation 531991. Up to 31614 conditions per place. [2023-08-30 11:57:21,138 INFO L137 encePairwiseOnDemand]: 291/299 looper letters, 1061 selfloop transitions, 161 changer transitions 14/1238 dead transitions. [2023-08-30 11:57:21,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 1238 transitions, 30124 flow [2023-08-30 11:57:21,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 11:57:21,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 11:57:21,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1855 transitions. [2023-08-30 11:57:21,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36494196340743656 [2023-08-30 11:57:21,141 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1855 transitions. [2023-08-30 11:57:21,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1855 transitions. [2023-08-30 11:57:21,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:57:21,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1855 transitions. [2023-08-30 11:57:21,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 109.11764705882354) internal successors, (1855), 17 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:57:21,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 299.0) internal successors, (5382), 18 states have internal predecessors, (5382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:57:21,147 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 299.0) internal successors, (5382), 18 states have internal predecessors, (5382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:57:21,147 INFO L175 Difference]: Start difference. First operand has 352 places, 1108 transitions, 24964 flow. Second operand 17 states and 1855 transitions. [2023-08-30 11:57:21,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 1238 transitions, 30124 flow [2023-08-30 11:57:33,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1238 transitions, 29222 flow, removed 323 selfloop flow, removed 19 redundant places. [2023-08-30 11:57:33,094 INFO L231 Difference]: Finished difference. Result has 332 places, 1114 transitions, 24787 flow [2023-08-30 11:57:33,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=24066, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=945, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=24787, PETRI_PLACES=332, PETRI_TRANSITIONS=1114} [2023-08-30 11:57:33,095 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 294 predicate places. [2023-08-30 11:57:33,096 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 1114 transitions, 24787 flow [2023-08-30 11:57:33,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 101.75) internal successors, (2849), 28 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:57:33,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:57:33,096 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:57:33,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-30 11:57:33,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-30 11:57:33,297 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:57:33,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:57:33,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1821047065, now seen corresponding path program 9 times [2023-08-30 11:57:33,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:57:33,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204051828] [2023-08-30 11:57:33,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:57:33,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:57:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:57:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:57:34,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:57:34,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204051828] [2023-08-30 11:57:34,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204051828] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:57:34,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729927303] [2023-08-30 11:57:34,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:57:34,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:57:34,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:57:34,300 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:57:34,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 11:57:34,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 11:57:34,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:57:34,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 11:57:34,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:57:34,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:57:34,660 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 30 treesize of output 30 [2023-08-30 11:57:34,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:57:34,734 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 30 treesize of output 30 [2023-08-30 11:57:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:57:34,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:57:34,841 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1623 (Array Int Int))) (< (+ |c_thread2Thread1of1ForFork1_~temp~0#1| c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1623) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)) is different from false [2023-08-30 11:57:34,846 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1623 (Array Int Int))) (< (let ((.cse0 (* c_~front~0 4))) (+ c_~d~0 (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset .cse0)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1623) c_~queue~0.base) (+ c_~queue~0.offset .cse0 4)))) 2147483648)) is different from false [2023-08-30 11:57:34,868 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1623 (Array Int Int)) (v_ArrVal_1622 (Array Int Int))) (< (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1622)) (.cse1 (* c_~front~0 4))) (+ c_~d~0 (select (select .cse0 c_~queue~0.base) (+ c_~queue~0.offset .cse1)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1623) c_~queue~0.base) (+ c_~queue~0.offset .cse1 4)))) 2147483648)) is different from false [2023-08-30 11:57:34,948 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:57:34,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 503 treesize of output 422 [2023-08-30 11:57:34,958 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:57:34,959 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 87 treesize of output 68 [2023-08-30 11:57:34,963 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 40 treesize of output 26 [2023-08-30 11:57:35,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-08-30 11:57:35,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729927303] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:57:35,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:57:35,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 27 [2023-08-30 11:57:35,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848924754] [2023-08-30 11:57:35,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:57:35,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 11:57:35,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:57:35,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 11:57:35,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=568, Unknown=3, NotChecked=150, Total=812 [2023-08-30 11:57:35,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 299 [2023-08-30 11:57:35,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 1114 transitions, 24787 flow. Second operand has 29 states, 29 states have (on average 98.62068965517241) internal successors, (2860), 29 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:57:35,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:57:35,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 299 [2023-08-30 11:57:35,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:57:49,221 INFO L130 PetriNetUnfolder]: 24926/39889 cut-off events. [2023-08-30 11:57:49,221 INFO L131 PetriNetUnfolder]: For 2095859/2095859 co-relation queries the response was YES. [2023-08-30 11:57:50,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 526220 conditions, 39889 events. 24926/39889 cut-off events. For 2095859/2095859 co-relation queries the response was YES. Maximal size of possible extension queue 1702. Compared 311915 event pairs, 4991 based on Foata normal form. 114/39392 useless extension candidates. Maximal degree in co-relation 526094. Up to 29262 conditions per place. [2023-08-30 11:57:50,694 INFO L137 encePairwiseOnDemand]: 291/299 looper letters, 983 selfloop transitions, 251 changer transitions 14/1250 dead transitions. [2023-08-30 11:57:50,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 1250 transitions, 29980 flow [2023-08-30 11:57:50,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 11:57:50,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 11:57:50,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1802 transitions. [2023-08-30 11:57:50,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35451505016722407 [2023-08-30 11:57:50,696 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1802 transitions. [2023-08-30 11:57:50,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1802 transitions. [2023-08-30 11:57:50,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:57:50,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1802 transitions. [2023-08-30 11:57:50,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 106.0) internal successors, (1802), 17 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:57:50,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 299.0) internal successors, (5382), 18 states have internal predecessors, (5382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:57:50,700 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 299.0) internal successors, (5382), 18 states have internal predecessors, (5382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:57:50,700 INFO L175 Difference]: Start difference. First operand has 332 places, 1114 transitions, 24787 flow. Second operand 17 states and 1802 transitions. [2023-08-30 11:57:50,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 1250 transitions, 29980 flow [2023-08-30 11:58:01,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 1250 transitions, 29651 flow, removed 54 selfloop flow, removed 13 redundant places. [2023-08-30 11:58:01,539 INFO L231 Difference]: Finished difference. Result has 337 places, 1116 transitions, 25245 flow [2023-08-30 11:58:01,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=24412, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=859, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=25245, PETRI_PLACES=337, PETRI_TRANSITIONS=1116} [2023-08-30 11:58:01,540 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 299 predicate places. [2023-08-30 11:58:01,540 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 1116 transitions, 25245 flow [2023-08-30 11:58:01,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 98.62068965517241) internal successors, (2860), 29 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:58:01,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:58:01,541 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:58:01,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 11:58:01,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:58:01,742 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:58:01,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:58:01,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1828360746, now seen corresponding path program 1 times [2023-08-30 11:58:01,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:58:01,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118681071] [2023-08-30 11:58:01,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:58:01,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:58:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:58:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:58:02,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:58:02,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118681071] [2023-08-30 11:58:02,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118681071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:58:02,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949731306] [2023-08-30 11:58:02,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:58:02,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:58:02,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:58:02,401 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:58:02,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 11:58:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:58:02,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 11:58:02,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:58:02,655 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:58:02,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:58:02,681 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:58:02,681 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 [2023-08-30 11:58:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:58:02,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949731306] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:58:02,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:58:02,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 4] total 19 [2023-08-30 11:58:02,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584580132] [2023-08-30 11:58:02,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:58:02,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 11:58:02,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:58:02,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 11:58:02,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-08-30 11:58:03,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 299 [2023-08-30 11:58:03,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 1116 transitions, 25245 flow. Second operand has 21 states, 21 states have (on average 122.04761904761905) internal successors, (2563), 21 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:58:03,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:58:03,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 299 [2023-08-30 11:58:03,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:58:23,093 INFO L130 PetriNetUnfolder]: 35479/56756 cut-off events. [2023-08-30 11:58:23,093 INFO L131 PetriNetUnfolder]: For 3086946/3087654 co-relation queries the response was YES. [2023-08-30 11:58:24,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750872 conditions, 56756 events. 35479/56756 cut-off events. For 3086946/3087654 co-relation queries the response was YES. Maximal size of possible extension queue 2219. Compared 459063 event pairs, 6089 based on Foata normal form. 1040/56505 useless extension candidates. Maximal degree in co-relation 750747. Up to 36381 conditions per place. [2023-08-30 11:58:25,350 INFO L137 encePairwiseOnDemand]: 289/299 looper letters, 993 selfloop transitions, 869 changer transitions 8/1872 dead transitions. [2023-08-30 11:58:25,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1872 transitions, 45671 flow [2023-08-30 11:58:25,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 11:58:25,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 11:58:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2469 transitions. [2023-08-30 11:58:25,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346065833480021 [2023-08-30 11:58:25,353 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2469 transitions. [2023-08-30 11:58:25,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2469 transitions. [2023-08-30 11:58:25,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:58:25,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2469 transitions. [2023-08-30 11:58:25,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 129.94736842105263) internal successors, (2469), 19 states have internal predecessors, (2469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:58:25,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 299.0) internal successors, (5980), 20 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:58:25,357 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 299.0) internal successors, (5980), 20 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:58:25,357 INFO L175 Difference]: Start difference. First operand has 337 places, 1116 transitions, 25245 flow. Second operand 19 states and 2469 transitions. [2023-08-30 11:58:25,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1872 transitions, 45671 flow [2023-08-30 11:58:44,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1872 transitions, 45193 flow, removed 34 selfloop flow, removed 14 redundant places. [2023-08-30 11:58:44,061 INFO L231 Difference]: Finished difference. Result has 345 places, 1515 transitions, 37409 flow [2023-08-30 11:58:44,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=24377, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1093, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=37409, PETRI_PLACES=345, PETRI_TRANSITIONS=1515} [2023-08-30 11:58:44,063 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 307 predicate places. [2023-08-30 11:58:44,063 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 1515 transitions, 37409 flow [2023-08-30 11:58:44,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 122.04761904761905) internal successors, (2563), 21 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:58:44,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:58:44,064 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:58:44,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-30 11:58:44,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 11:58:44,270 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 11:58:44,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:58:44,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1938848295, now seen corresponding path program 10 times [2023-08-30 11:58:44,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:58:44,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882037238] [2023-08-30 11:58:44,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:58:44,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:58:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:58:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:58:44,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:58:44,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882037238] [2023-08-30 11:58:44,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882037238] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:58:44,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139858854] [2023-08-30 11:58:44,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:58:44,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:58:44,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:58:44,848 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:58:44,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 11:58:44,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:58:44,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:58:44,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 11:58:44,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:58:45,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:58:45,452 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 30 treesize of output 30 [2023-08-30 11:58:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:58:45,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:58:45,541 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1732 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1732) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)) is different from false [2023-08-30 11:58:45,549 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1732 (Array Int Int))) (< (+ |c_thread2Thread1of1ForFork1_~temp~0#1| c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1732) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)) is different from false [2023-08-30 11:58:45,766 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 11:58:45,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 73 [2023-08-30 11:58:45,774 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 17 treesize of output 10 [2023-08-30 11:58:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:58:46,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139858854] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:58:46,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:58:46,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-30 11:58:46,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558825622] [2023-08-30 11:58:46,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:58:46,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 11:58:46,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:58:46,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 11:58:46,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=911, Unknown=2, NotChecked=126, Total=1190 [2023-08-30 11:58:46,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 299 [2023-08-30 11:58:46,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 1515 transitions, 37409 flow. Second operand has 35 states, 35 states have (on average 101.62857142857143) internal successors, (3557), 35 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:58:46,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:58:46,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 299 [2023-08-30 11:58:46,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:59:00,819 WARN L222 SmtUtils]: Spent 12.27s on a formula simplification. DAG size of input: 70 DAG size of output: 69 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 11:59:18,257 WARN L222 SmtUtils]: Spent 16.25s on a formula simplification. DAG size of input: 70 DAG size of output: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 11:59:51,225 INFO L130 PetriNetUnfolder]: 41831/66269 cut-off events. [2023-08-30 11:59:51,225 INFO L131 PetriNetUnfolder]: For 3656998/3658442 co-relation queries the response was YES. [2023-08-30 11:59:53,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 910352 conditions, 66269 events. 41831/66269 cut-off events. For 3656998/3658442 co-relation queries the response was YES. Maximal size of possible extension queue 2642. Compared 544417 event pairs, 14277 based on Foata normal form. 202/64887 useless extension candidates. Maximal degree in co-relation 910222. Up to 47746 conditions per place. [2023-08-30 11:59:53,901 INFO L137 encePairwiseOnDemand]: 282/299 looper letters, 1576 selfloop transitions, 635 changer transitions 9/2222 dead transitions. [2023-08-30 11:59:53,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 2222 transitions, 58265 flow [2023-08-30 11:59:53,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 11:59:53,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 11:59:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3739 transitions. [2023-08-30 11:59:53,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367794609482589 [2023-08-30 11:59:53,904 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3739 transitions. [2023-08-30 11:59:53,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3739 transitions. [2023-08-30 11:59:53,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:59:53,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3739 transitions. [2023-08-30 11:59:53,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 109.97058823529412) internal successors, (3739), 34 states have internal predecessors, (3739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:59:53,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 299.0) internal successors, (10465), 35 states have internal predecessors, (10465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:59:53,912 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 299.0) internal successors, (10465), 35 states have internal predecessors, (10465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:59:53,912 INFO L175 Difference]: Start difference. First operand has 345 places, 1515 transitions, 37409 flow. Second operand 34 states and 3739 transitions. [2023-08-30 11:59:53,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 2222 transitions, 58265 flow [2023-08-30 12:00:21,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 2222 transitions, 56733 flow, removed 370 selfloop flow, removed 8 redundant places. [2023-08-30 12:00:21,214 INFO L231 Difference]: Finished difference. Result has 388 places, 1955 transitions, 49954 flow [2023-08-30 12:00:21,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=35924, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=49954, PETRI_PLACES=388, PETRI_TRANSITIONS=1955} [2023-08-30 12:00:21,216 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 350 predicate places. [2023-08-30 12:00:21,216 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 1955 transitions, 49954 flow [2023-08-30 12:00:21,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 101.62857142857143) internal successors, (3557), 35 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:00:21,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 12:00:21,217 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 12:00:21,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-30 12:00:21,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-30 12:00:21,418 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-30 12:00:21,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 12:00:21,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1046601165, now seen corresponding path program 11 times [2023-08-30 12:00:21,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 12:00:21,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136679577] [2023-08-30 12:00:21,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 12:00:21,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 12:00:21,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 12:00:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 12:00:22,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 12:00:22,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136679577] [2023-08-30 12:00:22,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136679577] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 12:00:22,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808078179] [2023-08-30 12:00:22,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 12:00:22,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 12:00:22,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 12:00:22,252 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 12:00:22,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 12:00:22,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 12:00:22,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 12:00:22,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 12:00:22,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 12:00:22,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 12:00:22,642 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 30 treesize of output 30 [2023-08-30 12:00:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 12:00:22,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 12:00:22,700 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1785 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1785) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)) is different from false [2023-08-30 12:00:22,828 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 12:00:22,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 73 [2023-08-30 12:00:22,833 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 17 treesize of output 10 [2023-08-30 12:00:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 12:00:22,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808078179] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 12:00:22,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 12:00:22,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2023-08-30 12:00:22,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094497242] [2023-08-30 12:00:22,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 12:00:22,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 12:00:22,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 12:00:22,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 12:00:22,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=566, Unknown=5, NotChecked=48, Total=702 [2023-08-30 12:00:23,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 299 [2023-08-30 12:00:23,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 1955 transitions, 49954 flow. Second operand has 27 states, 27 states have (on average 101.77777777777777) internal successors, (2748), 27 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 12:00:23,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 12:00:23,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 299 [2023-08-30 12:00:23,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 12:01:01,402 INFO L130 PetriNetUnfolder]: 44902/71059 cut-off events. [2023-08-30 12:01:01,402 INFO L131 PetriNetUnfolder]: For 5175773/5176909 co-relation queries the response was YES. [2023-08-30 12:01:04,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1115202 conditions, 71059 events. 44902/71059 cut-off events. For 5175773/5176909 co-relation queries the response was YES. Maximal size of possible extension queue 2706. Compared 587085 event pairs, 12271 based on Foata normal form. 285/69939 useless extension candidates. Maximal degree in co-relation 1115053. Up to 51769 conditions per place.