./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 11:48:25,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 11:48:25,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 11:48:25,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 11:48:25,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 11:48:25,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 11:48:25,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 11:48:25,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 11:48:25,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 11:48:25,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 11:48:25,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 11:48:25,508 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 11:48:25,508 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 11:48:25,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 11:48:25,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 11:48:25,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 11:48:25,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 11:48:25,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 11:48:25,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 11:48:25,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 11:48:25,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 11:48:25,531 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 11:48:25,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 11:48:25,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 11:48:25,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 11:48:25,539 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 11:48:25,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 11:48:25,541 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 11:48:25,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 11:48:25,543 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 11:48:25,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 11:48:25,549 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 11:48:25,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 11:48:25,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 11:48:25,552 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 11:48:25,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 11:48:25,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 11:48:25,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 11:48:25,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 11:48:25,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 11:48:25,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 11:48:25,561 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 11:48:25,595 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 11:48:25,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 11:48:25,596 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 11:48:25,596 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 11:48:25,597 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 11:48:25,597 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 11:48:25,598 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 11:48:25,598 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 11:48:25,598 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 11:48:25,598 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 11:48:25,599 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 11:48:25,599 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 11:48:25,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 11:48:25,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 11:48:25,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 11:48:25,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 11:48:25,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 11:48:25,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 11:48:25,601 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 11:48:25,601 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 11:48:25,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 11:48:25,601 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 11:48:25,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 11:48:25,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 11:48:25,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 11:48:25,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 11:48:25,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:48:25,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 11:48:25,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 11:48:25,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 11:48:25,603 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 11:48:25,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 11:48:25,604 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 11:48:25,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 11:48:25,604 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 11:48:25,604 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 11:48:25,604 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 11:48:25,605 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 11:48:25,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 11:48:25,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 11:48:25,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 11:48:25,928 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 11:48:25,929 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 11:48:25,930 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-08-30 11:48:27,080 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 11:48:27,315 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 11:48:27,316 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-08-30 11:48:27,323 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b16011d9d/5eafc412a9804096a602d1e89b47d38e/FLAGf0bc36bf0 [2023-08-30 11:48:27,348 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b16011d9d/5eafc412a9804096a602d1e89b47d38e [2023-08-30 11:48:27,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 11:48:27,352 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 11:48:27,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 11:48:27,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 11:48:27,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 11:48:27,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:48:27" (1/1) ... [2023-08-30 11:48:27,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@368ebeb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:27, skipping insertion in model container [2023-08-30 11:48:27,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:48:27" (1/1) ... [2023-08-30 11:48:27,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 11:48:27,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 11:48:27,539 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2023-08-30 11:48:27,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:48:27,552 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 11:48:27,574 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2023-08-30 11:48:27,577 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 11:48:27,585 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:48:27,588 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 11:48:27,593 INFO L208 MainTranslator]: Completed translation [2023-08-30 11:48:27,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:27 WrapperNode [2023-08-30 11:48:27,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 11:48:27,595 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 11:48:27,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 11:48:27,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 11:48:27,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:27" (1/1) ... [2023-08-30 11:48:27,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:27" (1/1) ... [2023-08-30 11:48:27,632 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 180 [2023-08-30 11:48:27,632 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 11:48:27,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 11:48:27,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 11:48:27,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 11:48:27,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:27" (1/1) ... [2023-08-30 11:48:27,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:27" (1/1) ... [2023-08-30 11:48:27,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:27" (1/1) ... [2023-08-30 11:48:27,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:27" (1/1) ... [2023-08-30 11:48:27,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:27" (1/1) ... [2023-08-30 11:48:27,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:27" (1/1) ... [2023-08-30 11:48:27,653 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:27" (1/1) ... [2023-08-30 11:48:27,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:27" (1/1) ... [2023-08-30 11:48:27,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 11:48:27,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 11:48:27,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 11:48:27,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 11:48:27,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:27" (1/1) ... [2023-08-30 11:48:27,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 11:48:27,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:48:27,702 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 11:48:27,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 11:48:27,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 11:48:27,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 11:48:27,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 11:48:27,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 11:48:27,751 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 11:48:27,751 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 11:48:27,751 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 11:48:27,751 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 11:48:27,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 11:48:27,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 11:48:27,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 11:48:27,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 11:48:27,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 11:48:27,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 11:48:27,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 11:48:27,753 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 11:48:27,829 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 11:48:27,831 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 11:48:28,191 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 11:48:28,361 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 11:48:28,361 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 11:48:28,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:48:28 BoogieIcfgContainer [2023-08-30 11:48:28,363 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 11:48:28,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 11:48:28,365 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 11:48:28,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 11:48:28,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:48:27" (1/3) ... [2023-08-30 11:48:28,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@199fdf6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:48:28, skipping insertion in model container [2023-08-30 11:48:28,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:48:27" (2/3) ... [2023-08-30 11:48:28,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@199fdf6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:48:28, skipping insertion in model container [2023-08-30 11:48:28,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:48:28" (3/3) ... [2023-08-30 11:48:28,372 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2023-08-30 11:48:28,379 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 11:48:28,387 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 11:48:28,387 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-08-30 11:48:28,387 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 11:48:28,484 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 11:48:28,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 154 transitions, 324 flow [2023-08-30 11:48:28,599 INFO L130 PetriNetUnfolder]: 11/152 cut-off events. [2023-08-30 11:48:28,599 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 11:48:28,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 152 events. 11/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 150 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 113. Up to 3 conditions per place. [2023-08-30 11:48:28,607 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 154 transitions, 324 flow [2023-08-30 11:48:28,615 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 136 transitions, 281 flow [2023-08-30 11:48:28,618 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 11:48:28,637 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 136 transitions, 281 flow [2023-08-30 11:48:28,640 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 136 transitions, 281 flow [2023-08-30 11:48:28,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 136 transitions, 281 flow [2023-08-30 11:48:28,695 INFO L130 PetriNetUnfolder]: 10/136 cut-off events. [2023-08-30 11:48:28,695 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 11:48:28,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 136 events. 10/136 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 148 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 113. Up to 3 conditions per place. [2023-08-30 11:48:28,698 INFO L119 LiptonReduction]: Number of co-enabled transitions 1350 [2023-08-30 11:48:34,161 INFO L134 LiptonReduction]: Checked pairs total: 1701 [2023-08-30 11:48:34,161 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-08-30 11:48:34,172 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 11:48:34,177 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;@3ba261ea, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 11:48:34,177 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-08-30 11:48:34,180 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 11:48:34,180 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 11:48:34,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:34,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 11:48:34,181 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:48:34,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:34,185 INFO L85 PathProgramCache]: Analyzing trace with hash 22502, now seen corresponding path program 1 times [2023-08-30 11:48:34,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:34,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896085132] [2023-08-30 11:48:34,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:34,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:34,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:34,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896085132] [2023-08-30 11:48:34,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896085132] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:48:34,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:48:34,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:48:34,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031022170] [2023-08-30 11:48:34,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:48:34,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:48:34,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:34,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:48:34,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:48:34,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 300 [2023-08-30 11:48:34,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:34,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:34,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 300 [2023-08-30 11:48:34,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:34,691 INFO L130 PetriNetUnfolder]: 435/661 cut-off events. [2023-08-30 11:48:34,692 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 11:48:34,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 661 events. 435/661 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 3031 event pairs, 244 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 617. Up to 332 conditions per place. [2023-08-30 11:48:34,697 INFO L137 encePairwiseOnDemand]: 293/300 looper letters, 41 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-08-30 11:48:34,698 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 44 transitions, 192 flow [2023-08-30 11:48:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:48:34,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:48:34,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 438 transitions. [2023-08-30 11:48:34,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2023-08-30 11:48:34,711 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 438 transitions. [2023-08-30 11:48:34,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 438 transitions. [2023-08-30 11:48:34,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:34,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 438 transitions. [2023-08-30 11:48:34,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:34,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:34,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:34,725 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 63 flow. Second operand 3 states and 438 transitions. [2023-08-30 11:48:34,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 44 transitions, 192 flow [2023-08-30 11:48:34,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 44 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 11:48:34,730 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 66 flow [2023-08-30 11:48:34,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-08-30 11:48:34,735 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2023-08-30 11:48:34,736 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 66 flow [2023-08-30 11:48:34,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:34,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:34,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 11:48:34,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 11:48:34,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:48:34,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:34,738 INFO L85 PathProgramCache]: Analyzing trace with hash 698752, now seen corresponding path program 1 times [2023-08-30 11:48:34,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:34,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434186740] [2023-08-30 11:48:34,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:34,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:34,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:34,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434186740] [2023-08-30 11:48:34,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434186740] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:48:34,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339163360] [2023-08-30 11:48:34,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:34,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:48:34,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:48:34,837 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:48:34,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 11:48:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:34,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:48:34,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:48:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:34,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:48:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:34,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339163360] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:48:34,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:48:34,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 11:48:34,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621586133] [2023-08-30 11:48:34,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:48:34,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:48:34,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:34,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:48:34,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:48:35,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 300 [2023-08-30 11:48:35,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 130.14285714285714) internal successors, (911), 7 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:35,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:35,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 300 [2023-08-30 11:48:35,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:35,422 INFO L130 PetriNetUnfolder]: 1089/1651 cut-off events. [2023-08-30 11:48:35,422 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-30 11:48:35,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3388 conditions, 1651 events. 1089/1651 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 8659 event pairs, 610 based on Foata normal form. 0/651 useless extension candidates. Maximal degree in co-relation 2707. Up to 331 conditions per place. [2023-08-30 11:48:35,430 INFO L137 encePairwiseOnDemand]: 296/300 looper letters, 97 selfloop transitions, 9 changer transitions 0/107 dead transitions. [2023-08-30 11:48:35,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 107 transitions, 470 flow [2023-08-30 11:48:35,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:48:35,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:48:35,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1012 transitions. [2023-08-30 11:48:35,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4819047619047619 [2023-08-30 11:48:35,435 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1012 transitions. [2023-08-30 11:48:35,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1012 transitions. [2023-08-30 11:48:35,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:35,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1012 transitions. [2023-08-30 11:48:35,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 144.57142857142858) internal successors, (1012), 7 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:35,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 300.0) internal successors, (2400), 8 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:35,443 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 300.0) internal successors, (2400), 8 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:35,443 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 66 flow. Second operand 7 states and 1012 transitions. [2023-08-30 11:48:35,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 107 transitions, 470 flow [2023-08-30 11:48:35,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 107 transitions, 468 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:48:35,446 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 123 flow [2023-08-30 11:48:35,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=123, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-30 11:48:35,447 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2023-08-30 11:48:35,447 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 123 flow [2023-08-30 11:48:35,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 130.14285714285714) internal successors, (911), 7 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:35,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:35,448 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-08-30 11:48:35,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 11:48:35,660 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 11:48:35,660 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:48:35,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:35,661 INFO L85 PathProgramCache]: Analyzing trace with hash 21661990, now seen corresponding path program 1 times [2023-08-30 11:48:35,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:35,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987634245] [2023-08-30 11:48:35,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:35,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:35,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:35,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987634245] [2023-08-30 11:48:35,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987634245] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:48:35,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701118095] [2023-08-30 11:48:35,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:35,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:48:35,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:48:35,783 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:48:35,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 11:48:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:35,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 11:48:35,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:48:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:35,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:48:35,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701118095] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:48:35,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:48:35,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-30 11:48:35,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405902406] [2023-08-30 11:48:35,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:48:35,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 11:48:35,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:35,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 11:48:35,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 11:48:35,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 300 [2023-08-30 11:48:35,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:35,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:35,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 300 [2023-08-30 11:48:35,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:36,156 INFO L130 PetriNetUnfolder]: 1086/1647 cut-off events. [2023-08-30 11:48:36,157 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-30 11:48:36,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3390 conditions, 1647 events. 1086/1647 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 8802 event pairs, 610 based on Foata normal form. 2/654 useless extension candidates. Maximal degree in co-relation 2024. Up to 986 conditions per place. [2023-08-30 11:48:36,165 INFO L137 encePairwiseOnDemand]: 297/300 looper letters, 61 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2023-08-30 11:48:36,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 65 transitions, 308 flow [2023-08-30 11:48:36,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:48:36,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:48:36,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 709 transitions. [2023-08-30 11:48:36,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4726666666666667 [2023-08-30 11:48:36,168 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 709 transitions. [2023-08-30 11:48:36,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 709 transitions. [2023-08-30 11:48:36,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:36,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 709 transitions. [2023-08-30 11:48:36,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.8) internal successors, (709), 5 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:36,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:36,174 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:36,174 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 123 flow. Second operand 5 states and 709 transitions. [2023-08-30 11:48:36,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 65 transitions, 308 flow [2023-08-30 11:48:36,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 65 transitions, 300 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 11:48:36,178 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 94 flow [2023-08-30 11:48:36,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-08-30 11:48:36,178 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-08-30 11:48:36,179 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 94 flow [2023-08-30 11:48:36,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:36,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:36,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 11:48:36,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 11:48:36,385 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 11:48:36,385 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:48:36,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:36,386 INFO L85 PathProgramCache]: Analyzing trace with hash 671623000, now seen corresponding path program 1 times [2023-08-30 11:48:36,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:36,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444681142] [2023-08-30 11:48:36,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:36,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:36,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:36,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444681142] [2023-08-30 11:48:36,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444681142] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:48:36,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:48:36,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:48:36,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386885472] [2023-08-30 11:48:36,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:48:36,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:48:36,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:36,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:48:36,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:48:36,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 300 [2023-08-30 11:48:36,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:36,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:36,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 300 [2023-08-30 11:48:36,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:36,648 INFO L130 PetriNetUnfolder]: 1226/2127 cut-off events. [2023-08-30 11:48:36,648 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-30 11:48:36,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4395 conditions, 2127 events. 1226/2127 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 12686 event pairs, 615 based on Foata normal form. 0/1047 useless extension candidates. Maximal degree in co-relation 3497. Up to 1328 conditions per place. [2023-08-30 11:48:36,657 INFO L137 encePairwiseOnDemand]: 296/300 looper letters, 40 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-30 11:48:36,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 42 transitions, 211 flow [2023-08-30 11:48:36,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:48:36,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:48:36,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 430 transitions. [2023-08-30 11:48:36,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2023-08-30 11:48:36,659 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 430 transitions. [2023-08-30 11:48:36,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 430 transitions. [2023-08-30 11:48:36,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:36,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 430 transitions. [2023-08-30 11:48:36,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:36,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:36,663 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:36,663 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 94 flow. Second operand 3 states and 430 transitions. [2023-08-30 11:48:36,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 42 transitions, 211 flow [2023-08-30 11:48:36,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 206 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 11:48:36,665 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 103 flow [2023-08-30 11:48:36,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2023-08-30 11:48:36,666 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-08-30 11:48:36,666 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 103 flow [2023-08-30 11:48:36,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:36,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:36,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 11:48:36,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 11:48:36,667 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:48:36,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:36,668 INFO L85 PathProgramCache]: Analyzing trace with hash 671622890, now seen corresponding path program 1 times [2023-08-30 11:48:36,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:36,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222096810] [2023-08-30 11:48:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:36,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:36,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:36,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222096810] [2023-08-30 11:48:36,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222096810] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:48:36,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:48:36,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:48:36,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29081819] [2023-08-30 11:48:36,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:48:36,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:48:36,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:36,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:48:36,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 11:48:36,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 300 [2023-08-30 11:48:36,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:36,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:36,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 300 [2023-08-30 11:48:36,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:36,956 INFO L130 PetriNetUnfolder]: 902/1580 cut-off events. [2023-08-30 11:48:36,957 INFO L131 PetriNetUnfolder]: For 149/206 co-relation queries the response was YES. [2023-08-30 11:48:36,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3552 conditions, 1580 events. 902/1580 cut-off events. For 149/206 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 9470 event pairs, 749 based on Foata normal form. 71/931 useless extension candidates. Maximal degree in co-relation 3505. Up to 1567 conditions per place. [2023-08-30 11:48:36,964 INFO L137 encePairwiseOnDemand]: 288/300 looper letters, 25 selfloop transitions, 2 changer transitions 6/34 dead transitions. [2023-08-30 11:48:36,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 184 flow [2023-08-30 11:48:36,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:48:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:48:36,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 542 transitions. [2023-08-30 11:48:36,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45166666666666666 [2023-08-30 11:48:36,967 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 542 transitions. [2023-08-30 11:48:36,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 542 transitions. [2023-08-30 11:48:36,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:36,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 542 transitions. [2023-08-30 11:48:36,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.5) internal successors, (542), 4 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:36,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:36,971 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:36,971 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 103 flow. Second operand 4 states and 542 transitions. [2023-08-30 11:48:36,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 184 flow [2023-08-30 11:48:36,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 34 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:48:36,973 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 127 flow [2023-08-30 11:48:36,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=41, PETRI_TRANSITIONS=28} [2023-08-30 11:48:36,974 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2023-08-30 11:48:36,974 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 127 flow [2023-08-30 11:48:36,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:36,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:36,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 11:48:36,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 11:48:36,975 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:48:36,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:36,975 INFO L85 PathProgramCache]: Analyzing trace with hash -657526496, now seen corresponding path program 1 times [2023-08-30 11:48:36,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:36,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845074651] [2023-08-30 11:48:36,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:36,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:37,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:37,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845074651] [2023-08-30 11:48:37,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845074651] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:48:37,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194368197] [2023-08-30 11:48:37,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:37,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:48:37,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:48:37,053 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:48:37,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 11:48:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:37,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:48:37,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:48:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:48:37,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:48:37,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194368197] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:48:37,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:48:37,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-30 11:48:37,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456120550] [2023-08-30 11:48:37,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:48:37,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:48:37,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:37,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:48:37,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 11:48:37,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 300 [2023-08-30 11:48:37,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:37,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:37,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 300 [2023-08-30 11:48:37,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:37,273 INFO L130 PetriNetUnfolder]: 493/875 cut-off events. [2023-08-30 11:48:37,273 INFO L131 PetriNetUnfolder]: For 243/287 co-relation queries the response was YES. [2023-08-30 11:48:37,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2428 conditions, 875 events. 493/875 cut-off events. For 243/287 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4512 event pairs, 380 based on Foata normal form. 44/631 useless extension candidates. Maximal degree in co-relation 2407. Up to 871 conditions per place. [2023-08-30 11:48:37,278 INFO L137 encePairwiseOnDemand]: 296/300 looper letters, 23 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-30 11:48:37,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 25 transitions, 163 flow [2023-08-30 11:48:37,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:48:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:48:37,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 412 transitions. [2023-08-30 11:48:37,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577777777777778 [2023-08-30 11:48:37,282 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 412 transitions. [2023-08-30 11:48:37,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 412 transitions. [2023-08-30 11:48:37,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:37,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 412 transitions. [2023-08-30 11:48:37,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:37,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:37,286 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:37,287 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 127 flow. Second operand 3 states and 412 transitions. [2023-08-30 11:48:37,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 25 transitions, 163 flow [2023-08-30 11:48:37,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 25 transitions, 157 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 11:48:37,288 INFO L231 Difference]: Finished difference. Result has 37 places, 25 transitions, 111 flow [2023-08-30 11:48:37,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=37, PETRI_TRANSITIONS=25} [2023-08-30 11:48:37,291 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-08-30 11:48:37,291 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 111 flow [2023-08-30 11:48:37,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:37,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:37,292 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 11:48:37,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 11:48:37,499 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 11:48:37,500 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:48:37,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:37,500 INFO L85 PathProgramCache]: Analyzing trace with hash -657626506, now seen corresponding path program 2 times [2023-08-30 11:48:37,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:37,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472511509] [2023-08-30 11:48:37,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:37,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:37,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:37,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472511509] [2023-08-30 11:48:37,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472511509] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:48:37,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255959909] [2023-08-30 11:48:37,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:48:37,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:48:37,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:48:37,575 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:48:37,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 11:48:37,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:48:37,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:48:37,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 11:48:37,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:48:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:48:37,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:48:37,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255959909] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:48:37,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:48:37,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 11:48:37,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095803353] [2023-08-30 11:48:37,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:48:37,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:48:37,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:37,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:48:37,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:48:37,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 300 [2023-08-30 11:48:37,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 25 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:37,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:37,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 300 [2023-08-30 11:48:37,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:37,778 INFO L130 PetriNetUnfolder]: 493/874 cut-off events. [2023-08-30 11:48:37,779 INFO L131 PetriNetUnfolder]: For 244/288 co-relation queries the response was YES. [2023-08-30 11:48:37,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2420 conditions, 874 events. 493/874 cut-off events. For 244/288 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4512 event pairs, 380 based on Foata normal form. 45/631 useless extension candidates. Maximal degree in co-relation 2405. Up to 870 conditions per place. [2023-08-30 11:48:37,783 INFO L137 encePairwiseOnDemand]: 298/300 looper letters, 22 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-08-30 11:48:37,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 24 transitions, 147 flow [2023-08-30 11:48:37,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:48:37,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:48:37,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 409 transitions. [2023-08-30 11:48:37,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45444444444444443 [2023-08-30 11:48:37,785 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 409 transitions. [2023-08-30 11:48:37,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 409 transitions. [2023-08-30 11:48:37,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:37,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 409 transitions. [2023-08-30 11:48:37,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:37,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:37,789 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:37,789 INFO L175 Difference]: Start difference. First operand has 37 places, 25 transitions, 111 flow. Second operand 3 states and 409 transitions. [2023-08-30 11:48:37,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 24 transitions, 147 flow [2023-08-30 11:48:37,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 24 transitions, 136 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-30 11:48:37,790 INFO L231 Difference]: Finished difference. Result has 33 places, 24 transitions, 92 flow [2023-08-30 11:48:37,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=33, PETRI_TRANSITIONS=24} [2023-08-30 11:48:37,791 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2023-08-30 11:48:37,792 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 24 transitions, 92 flow [2023-08-30 11:48:37,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:37,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:37,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:48:37,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 11:48:37,998 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 11:48:37,998 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:48:37,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:37,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1091519694, now seen corresponding path program 1 times [2023-08-30 11:48:37,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:37,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077795247] [2023-08-30 11:48:37,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:37,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:48:38,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:38,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077795247] [2023-08-30 11:48:38,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077795247] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:48:38,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387830487] [2023-08-30 11:48:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:38,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:48:38,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:48:38,054 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:48:38,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 11:48:38,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:38,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:48:38,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:48:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:48:38,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:48:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:48:38,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387830487] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:48:38,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:48:38,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 11:48:38,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569511028] [2023-08-30 11:48:38,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:48:38,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:48:38,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:38,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:48:38,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 11:48:38,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 300 [2023-08-30 11:48:38,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 24 transitions, 92 flow. Second operand has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:38,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:38,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 300 [2023-08-30 11:48:38,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:38,461 INFO L130 PetriNetUnfolder]: 1233/2066 cut-off events. [2023-08-30 11:48:38,462 INFO L131 PetriNetUnfolder]: For 196/196 co-relation queries the response was YES. [2023-08-30 11:48:38,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5652 conditions, 2066 events. 1233/2066 cut-off events. For 196/196 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11414 event pairs, 228 based on Foata normal form. 0/1394 useless extension candidates. Maximal degree in co-relation 5640. Up to 865 conditions per place. [2023-08-30 11:48:38,471 INFO L137 encePairwiseOnDemand]: 296/300 looper letters, 73 selfloop transitions, 9 changer transitions 0/82 dead transitions. [2023-08-30 11:48:38,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 82 transitions, 446 flow [2023-08-30 11:48:38,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 11:48:38,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 11:48:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 991 transitions. [2023-08-30 11:48:38,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4719047619047619 [2023-08-30 11:48:38,474 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 991 transitions. [2023-08-30 11:48:38,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 991 transitions. [2023-08-30 11:48:38,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:38,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 991 transitions. [2023-08-30 11:48:38,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 141.57142857142858) internal successors, (991), 7 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:38,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 300.0) internal successors, (2400), 8 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:38,481 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 300.0) internal successors, (2400), 8 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:38,481 INFO L175 Difference]: Start difference. First operand has 33 places, 24 transitions, 92 flow. Second operand 7 states and 991 transitions. [2023-08-30 11:48:38,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 82 transitions, 446 flow [2023-08-30 11:48:38,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 82 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:48:38,483 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 150 flow [2023-08-30 11:48:38,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=150, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-08-30 11:48:38,486 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2023-08-30 11:48:38,486 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 150 flow [2023-08-30 11:48:38,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:38,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:38,487 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 11:48:38,493 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 11:48:38,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:48:38,693 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:48:38,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:38,694 INFO L85 PathProgramCache]: Analyzing trace with hash -522626693, now seen corresponding path program 1 times [2023-08-30 11:48:38,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:38,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316596817] [2023-08-30 11:48:38,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:38,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 11:48:38,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:38,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316596817] [2023-08-30 11:48:38,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316596817] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:48:38,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:48:38,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:48:38,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608592657] [2023-08-30 11:48:38,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:48:38,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:48:38,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:38,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:48:38,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:48:38,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 300 [2023-08-30 11:48:38,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:38,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:38,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 300 [2023-08-30 11:48:38,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:38,958 INFO L130 PetriNetUnfolder]: 1021/1806 cut-off events. [2023-08-30 11:48:38,958 INFO L131 PetriNetUnfolder]: For 316/316 co-relation queries the response was YES. [2023-08-30 11:48:38,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5479 conditions, 1806 events. 1021/1806 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10447 event pairs, 16 based on Foata normal form. 96/1494 useless extension candidates. Maximal degree in co-relation 5464. Up to 1724 conditions per place. [2023-08-30 11:48:38,972 INFO L137 encePairwiseOnDemand]: 298/300 looper letters, 33 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-08-30 11:48:38,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 34 transitions, 217 flow [2023-08-30 11:48:38,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:48:38,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:48:38,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 417 transitions. [2023-08-30 11:48:38,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4633333333333333 [2023-08-30 11:48:38,975 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 417 transitions. [2023-08-30 11:48:38,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 417 transitions. [2023-08-30 11:48:38,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:38,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 417 transitions. [2023-08-30 11:48:38,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:38,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:38,978 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:38,978 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 150 flow. Second operand 3 states and 417 transitions. [2023-08-30 11:48:38,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 34 transitions, 217 flow [2023-08-30 11:48:38,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 209 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 11:48:38,983 INFO L231 Difference]: Finished difference. Result has 40 places, 26 transitions, 117 flow [2023-08-30 11:48:38,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=40, PETRI_TRANSITIONS=26} [2023-08-30 11:48:38,984 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 9 predicate places. [2023-08-30 11:48:38,984 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 26 transitions, 117 flow [2023-08-30 11:48:38,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:38,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:38,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:48:38,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 11:48:38,985 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:48:38,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:38,985 INFO L85 PathProgramCache]: Analyzing trace with hash -518182921, now seen corresponding path program 1 times [2023-08-30 11:48:38,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:38,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771448833] [2023-08-30 11:48:38,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:38,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:48:39,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:39,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771448833] [2023-08-30 11:48:39,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771448833] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:48:39,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:48:39,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 11:48:39,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768944718] [2023-08-30 11:48:39,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:48:39,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:48:39,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:39,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:48:39,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 11:48:39,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 300 [2023-08-30 11:48:39,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 26 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:39,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:39,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 300 [2023-08-30 11:48:39,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:39,253 INFO L130 PetriNetUnfolder]: 885/1602 cut-off events. [2023-08-30 11:48:39,253 INFO L131 PetriNetUnfolder]: For 1056/1096 co-relation queries the response was YES. [2023-08-30 11:48:39,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4668 conditions, 1602 events. 885/1602 cut-off events. For 1056/1096 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 8996 event pairs, 316 based on Foata normal form. 48/1290 useless extension candidates. Maximal degree in co-relation 4652. Up to 1561 conditions per place. [2023-08-30 11:48:39,262 INFO L137 encePairwiseOnDemand]: 293/300 looper letters, 27 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-08-30 11:48:39,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 31 transitions, 191 flow [2023-08-30 11:48:39,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:48:39,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:48:39,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 411 transitions. [2023-08-30 11:48:39,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45666666666666667 [2023-08-30 11:48:39,264 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 411 transitions. [2023-08-30 11:48:39,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 411 transitions. [2023-08-30 11:48:39,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:39,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 411 transitions. [2023-08-30 11:48:39,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 11:48:39,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:39,267 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:39,267 INFO L175 Difference]: Start difference. First operand has 40 places, 26 transitions, 117 flow. Second operand 3 states and 411 transitions. [2023-08-30 11:48:39,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 31 transitions, 191 flow [2023-08-30 11:48:39,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 31 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:48:39,271 INFO L231 Difference]: Finished difference. Result has 42 places, 27 transitions, 139 flow [2023-08-30 11:48:39,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=42, PETRI_TRANSITIONS=27} [2023-08-30 11:48:39,273 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 11 predicate places. [2023-08-30 11:48:39,273 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 27 transitions, 139 flow [2023-08-30 11:48:39,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:39,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:39,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:48:39,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 11:48:39,274 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:48:39,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:39,274 INFO L85 PathProgramCache]: Analyzing trace with hash 232958398, now seen corresponding path program 1 times [2023-08-30 11:48:39,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:39,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496103224] [2023-08-30 11:48:39,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:39,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:39,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:39,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496103224] [2023-08-30 11:48:39,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496103224] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:48:39,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577043599] [2023-08-30 11:48:39,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:39,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:48:39,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:48:39,632 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 11:48:39,647 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 11:48:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:39,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 11:48:39,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:48:39,804 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 11:48:39,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:48:39,906 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 11:48:39,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:48:39,987 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 18 treesize of output 20 [2023-08-30 11:48:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:40,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:48:40,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:48:40,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 11:48:40,343 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:48:40,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 71 [2023-08-30 11:48:40,351 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 26 [2023-08-30 11:48:40,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2023-08-30 11:48:40,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:40,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577043599] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:48:40,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:48:40,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2023-08-30 11:48:40,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793733759] [2023-08-30 11:48:40,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:48:40,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 11:48:40,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:40,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 11:48:40,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=284, Unknown=1, NotChecked=0, Total=342 [2023-08-30 11:48:41,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 300 [2023-08-30 11:48:41,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 27 transitions, 139 flow. Second operand has 19 states, 19 states have (on average 107.42105263157895) internal successors, (2041), 19 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:41,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:41,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 300 [2023-08-30 11:48:41,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:43,340 INFO L130 PetriNetUnfolder]: 1508/2649 cut-off events. [2023-08-30 11:48:43,341 INFO L131 PetriNetUnfolder]: For 2105/2143 co-relation queries the response was YES. [2023-08-30 11:48:43,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9076 conditions, 2649 events. 1508/2649 cut-off events. For 2105/2143 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16352 event pairs, 396 based on Foata normal form. 38/1993 useless extension candidates. Maximal degree in co-relation 9058. Up to 1676 conditions per place. [2023-08-30 11:48:43,360 INFO L137 encePairwiseOnDemand]: 288/300 looper letters, 105 selfloop transitions, 58 changer transitions 7/171 dead transitions. [2023-08-30 11:48:43,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 171 transitions, 1182 flow [2023-08-30 11:48:43,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-30 11:48:43,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-30 11:48:43,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2272 transitions. [2023-08-30 11:48:43,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37866666666666665 [2023-08-30 11:48:43,368 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2272 transitions. [2023-08-30 11:48:43,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2272 transitions. [2023-08-30 11:48:43,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:43,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2272 transitions. [2023-08-30 11:48:43,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 113.6) internal successors, (2272), 20 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:43,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 300.0) internal successors, (6300), 21 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:43,384 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 300.0) internal successors, (6300), 21 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:43,384 INFO L175 Difference]: Start difference. First operand has 42 places, 27 transitions, 139 flow. Second operand 20 states and 2272 transitions. [2023-08-30 11:48:43,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 171 transitions, 1182 flow [2023-08-30 11:48:43,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 171 transitions, 1059 flow, removed 56 selfloop flow, removed 2 redundant places. [2023-08-30 11:48:43,395 INFO L231 Difference]: Finished difference. Result has 72 places, 89 transitions, 691 flow [2023-08-30 11:48:43,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=691, PETRI_PLACES=72, PETRI_TRANSITIONS=89} [2023-08-30 11:48:43,396 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2023-08-30 11:48:43,396 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 89 transitions, 691 flow [2023-08-30 11:48:43,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 107.42105263157895) internal successors, (2041), 19 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:43,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:43,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:48:43,405 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 11:48:43,603 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 11:48:43,603 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:48:43,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:43,604 INFO L85 PathProgramCache]: Analyzing trace with hash 232959182, now seen corresponding path program 1 times [2023-08-30 11:48:43,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:43,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935771498] [2023-08-30 11:48:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:43,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:44,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:44,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935771498] [2023-08-30 11:48:44,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935771498] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:48:44,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932362372] [2023-08-30 11:48:44,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:44,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:48:44,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:48:44,009 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 11:48:44,012 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 11:48:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:44,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 11:48:44,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:48:44,134 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 11:48:44,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:48:44,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:48:44,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:48:44,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:48:44,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:44,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:48:44,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:48:44,566 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 11:48:44,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:48:44,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 81 [2023-08-30 11:48:44,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-08-30 11:48:44,587 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 11:48:44,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:44,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932362372] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:48:44,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:48:44,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2023-08-30 11:48:44,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285982418] [2023-08-30 11:48:44,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:48:44,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 11:48:44,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:44,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 11:48:44,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=285, Unknown=1, NotChecked=0, Total=342 [2023-08-30 11:48:45,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 11:48:45,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 89 transitions, 691 flow. Second operand has 19 states, 19 states have (on average 90.42105263157895) internal successors, (1718), 19 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:45,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:45,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 11:48:45,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:47,452 INFO L130 PetriNetUnfolder]: 1658/3013 cut-off events. [2023-08-30 11:48:47,452 INFO L131 PetriNetUnfolder]: For 13213/13255 co-relation queries the response was YES. [2023-08-30 11:48:47,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14539 conditions, 3013 events. 1658/3013 cut-off events. For 13213/13255 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 19850 event pairs, 366 based on Foata normal form. 40/2571 useless extension candidates. Maximal degree in co-relation 14508. Up to 1826 conditions per place. [2023-08-30 11:48:47,478 INFO L137 encePairwiseOnDemand]: 288/300 looper letters, 141 selfloop transitions, 76 changer transitions 4/222 dead transitions. [2023-08-30 11:48:47,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 222 transitions, 2107 flow [2023-08-30 11:48:47,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 11:48:47,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 11:48:47,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2405 transitions. [2023-08-30 11:48:47,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32066666666666666 [2023-08-30 11:48:47,485 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2405 transitions. [2023-08-30 11:48:47,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2405 transitions. [2023-08-30 11:48:47,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:47,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2405 transitions. [2023-08-30 11:48:47,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 96.2) internal successors, (2405), 25 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:47,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 300.0) internal successors, (7800), 26 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:47,503 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 300.0) internal successors, (7800), 26 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:47,503 INFO L175 Difference]: Start difference. First operand has 72 places, 89 transitions, 691 flow. Second operand 25 states and 2405 transitions. [2023-08-30 11:48:47,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 222 transitions, 2107 flow [2023-08-30 11:48:47,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 222 transitions, 2065 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-08-30 11:48:47,545 INFO L231 Difference]: Finished difference. Result has 94 places, 114 transitions, 1139 flow [2023-08-30 11:48:47,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1139, PETRI_PLACES=94, PETRI_TRANSITIONS=114} [2023-08-30 11:48:47,546 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 63 predicate places. [2023-08-30 11:48:47,546 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 114 transitions, 1139 flow [2023-08-30 11:48:47,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.42105263157895) internal successors, (1718), 19 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:47,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:47,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:48:47,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 11:48:47,747 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 11:48:47,747 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:48:47,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:47,748 INFO L85 PathProgramCache]: Analyzing trace with hash 240945185, now seen corresponding path program 1 times [2023-08-30 11:48:47,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:47,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540352817] [2023-08-30 11:48:47,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:47,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:48,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:48,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540352817] [2023-08-30 11:48:48,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540352817] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:48:48,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544295531] [2023-08-30 11:48:48,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:48,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:48:48,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:48:48,189 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 11:48:48,215 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 11:48:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:48,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 11:48:48,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:48:48,337 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 11:48:48,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:48:48,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:48:48,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:48:48,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:48:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:48,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:48:48,723 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:48:48,723 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 11:48:48,733 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:48:48,733 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 175 treesize of output 159 [2023-08-30 11:48:48,743 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 11:48:48,749 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 11:48:48,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:48,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544295531] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:48:48,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:48:48,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 11:48:48,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957265267] [2023-08-30 11:48:48,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:48:48,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 11:48:48,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:48,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 11:48:48,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=307, Unknown=9, NotChecked=0, Total=380 [2023-08-30 11:48:49,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 11:48:49,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 114 transitions, 1139 flow. Second operand has 20 states, 20 states have (on average 90.35) internal successors, (1807), 20 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:49,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:49,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 11:48:49,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:51,399 INFO L130 PetriNetUnfolder]: 1786/3161 cut-off events. [2023-08-30 11:48:51,400 INFO L131 PetriNetUnfolder]: For 18182/18224 co-relation queries the response was YES. [2023-08-30 11:48:51,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17143 conditions, 3161 events. 1786/3161 cut-off events. For 18182/18224 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20275 event pairs, 632 based on Foata normal form. 140/2979 useless extension candidates. Maximal degree in co-relation 17109. Up to 2249 conditions per place. [2023-08-30 11:48:51,429 INFO L137 encePairwiseOnDemand]: 289/300 looper letters, 136 selfloop transitions, 55 changer transitions 35/227 dead transitions. [2023-08-30 11:48:51,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 227 transitions, 2490 flow [2023-08-30 11:48:51,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 11:48:51,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 11:48:51,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2188 transitions. [2023-08-30 11:48:51,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3171014492753623 [2023-08-30 11:48:51,436 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2188 transitions. [2023-08-30 11:48:51,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2188 transitions. [2023-08-30 11:48:51,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:51,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2188 transitions. [2023-08-30 11:48:51,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 95.1304347826087) internal successors, (2188), 23 states have internal predecessors, (2188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:51,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 300.0) internal successors, (7200), 24 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:51,458 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 300.0) internal successors, (7200), 24 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:51,458 INFO L175 Difference]: Start difference. First operand has 94 places, 114 transitions, 1139 flow. Second operand 23 states and 2188 transitions. [2023-08-30 11:48:51,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 227 transitions, 2490 flow [2023-08-30 11:48:51,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 227 transitions, 2302 flow, removed 52 selfloop flow, removed 11 redundant places. [2023-08-30 11:48:51,510 INFO L231 Difference]: Finished difference. Result has 109 places, 124 transitions, 1240 flow [2023-08-30 11:48:51,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1240, PETRI_PLACES=109, PETRI_TRANSITIONS=124} [2023-08-30 11:48:51,511 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 78 predicate places. [2023-08-30 11:48:51,511 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 124 transitions, 1240 flow [2023-08-30 11:48:51,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 90.35) internal successors, (1807), 20 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:51,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:51,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:48:51,525 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 11:48:51,717 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 11:48:51,718 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:48:51,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:51,718 INFO L85 PathProgramCache]: Analyzing trace with hash 265880305, now seen corresponding path program 1 times [2023-08-30 11:48:51,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:51,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554521250] [2023-08-30 11:48:51,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:51,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:52,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:52,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554521250] [2023-08-30 11:48:52,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554521250] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:48:52,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262375538] [2023-08-30 11:48:52,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:52,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:48:52,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:48:52,117 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:48:52,141 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 11:48:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:52,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 11:48:52,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:48:52,258 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 11:48:52,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:48:52,293 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 11:48:52,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:48:52,373 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 11:48:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:52,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:48:52,456 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_343 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_343) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 2147483648)) is different from false [2023-08-30 11:48:52,557 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:48:52,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-30 11:48:52,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:48:52,567 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 157 treesize of output 141 [2023-08-30 11:48:52,584 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 27 treesize of output 21 [2023-08-30 11:48:52,612 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 28 treesize of output 16 [2023-08-30 11:48:52,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:48:52,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262375538] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:48:52,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:48:52,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 11:48:52,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505168359] [2023-08-30 11:48:52,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:48:52,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 11:48:52,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:52,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 11:48:52,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=283, Unknown=1, NotChecked=34, Total=380 [2023-08-30 11:48:52,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 11:48:52,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 124 transitions, 1240 flow. Second operand has 20 states, 20 states have (on average 90.35) internal successors, (1807), 20 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:52,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:52,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 11:48:52,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:54,065 INFO L130 PetriNetUnfolder]: 1608/2879 cut-off events. [2023-08-30 11:48:54,066 INFO L131 PetriNetUnfolder]: For 20044/20084 co-relation queries the response was YES. [2023-08-30 11:48:54,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16195 conditions, 2879 events. 1608/2879 cut-off events. For 20044/20084 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 18392 event pairs, 632 based on Foata normal form. 130/2784 useless extension candidates. Maximal degree in co-relation 16155. Up to 2143 conditions per place. [2023-08-30 11:48:54,093 INFO L137 encePairwiseOnDemand]: 289/300 looper letters, 139 selfloop transitions, 43 changer transitions 0/183 dead transitions. [2023-08-30 11:48:54,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 183 transitions, 2097 flow [2023-08-30 11:48:54,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 11:48:54,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 11:48:54,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1704 transitions. [2023-08-30 11:48:54,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31555555555555553 [2023-08-30 11:48:54,098 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1704 transitions. [2023-08-30 11:48:54,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1704 transitions. [2023-08-30 11:48:54,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:54,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1704 transitions. [2023-08-30 11:48:54,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 94.66666666666667) internal successors, (1704), 18 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:54,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 300.0) internal successors, (5700), 19 states have internal predecessors, (5700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:54,107 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 300.0) internal successors, (5700), 19 states have internal predecessors, (5700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:54,107 INFO L175 Difference]: Start difference. First operand has 109 places, 124 transitions, 1240 flow. Second operand 18 states and 1704 transitions. [2023-08-30 11:48:54,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 183 transitions, 2097 flow [2023-08-30 11:48:54,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 183 transitions, 1996 flow, removed 26 selfloop flow, removed 11 redundant places. [2023-08-30 11:48:54,150 INFO L231 Difference]: Finished difference. Result has 111 places, 117 transitions, 1184 flow [2023-08-30 11:48:54,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1184, PETRI_PLACES=111, PETRI_TRANSITIONS=117} [2023-08-30 11:48:54,151 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2023-08-30 11:48:54,151 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 117 transitions, 1184 flow [2023-08-30 11:48:54,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 90.35) internal successors, (1807), 20 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:54,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:54,152 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:48:54,171 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 11:48:54,357 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 11:48:54,357 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:48:54,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:54,358 INFO L85 PathProgramCache]: Analyzing trace with hash -127291424, now seen corresponding path program 2 times [2023-08-30 11:48:54,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:54,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443888224] [2023-08-30 11:48:54,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:54,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:54,910 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 11:48:54,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:54,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443888224] [2023-08-30 11:48:54,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443888224] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:48:54,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103600951] [2023-08-30 11:48:54,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:48:54,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:48:54,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:48:54,911 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 11:48:54,913 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 11:48:54,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:48:54,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:48:54,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 11:48:54,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:48:55,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:48:55,039 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 11:48:55,065 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 11:48:55,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:48:55,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103600951] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:48:55,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:48:55,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-08-30 11:48:55,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874064367] [2023-08-30 11:48:55,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:48:55,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:48:55,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:55,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:48:55,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-08-30 11:48:55,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 300 [2023-08-30 11:48:55,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 117 transitions, 1184 flow. Second operand has 7 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:55,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:55,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 300 [2023-08-30 11:48:55,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:55,507 INFO L130 PetriNetUnfolder]: 1582/2845 cut-off events. [2023-08-30 11:48:55,507 INFO L131 PetriNetUnfolder]: For 20219/20255 co-relation queries the response was YES. [2023-08-30 11:48:55,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16172 conditions, 2845 events. 1582/2845 cut-off events. For 20219/20255 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 18117 event pairs, 454 based on Foata normal form. 62/2686 useless extension candidates. Maximal degree in co-relation 16132. Up to 2730 conditions per place. [2023-08-30 11:48:55,570 INFO L137 encePairwiseOnDemand]: 292/300 looper letters, 118 selfloop transitions, 14 changer transitions 9/142 dead transitions. [2023-08-30 11:48:55,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 142 transitions, 1629 flow [2023-08-30 11:48:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:48:55,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:48:55,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 615 transitions. [2023-08-30 11:48:55,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2023-08-30 11:48:55,573 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 615 transitions. [2023-08-30 11:48:55,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 615 transitions. [2023-08-30 11:48:55,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:55,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 615 transitions. [2023-08-30 11:48:55,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:55,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:55,579 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:55,580 INFO L175 Difference]: Start difference. First operand has 111 places, 117 transitions, 1184 flow. Second operand 5 states and 615 transitions. [2023-08-30 11:48:55,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 142 transitions, 1629 flow [2023-08-30 11:48:55,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 142 transitions, 1533 flow, removed 11 selfloop flow, removed 13 redundant places. [2023-08-30 11:48:55,625 INFO L231 Difference]: Finished difference. Result has 104 places, 120 transitions, 1196 flow [2023-08-30 11:48:55,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1196, PETRI_PLACES=104, PETRI_TRANSITIONS=120} [2023-08-30 11:48:55,626 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 73 predicate places. [2023-08-30 11:48:55,626 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 120 transitions, 1196 flow [2023-08-30 11:48:55,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:55,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:55,626 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-30 11:48:55,632 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 11:48:55,831 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 11:48:55,832 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:48:55,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:55,832 INFO L85 PathProgramCache]: Analyzing trace with hash 266977678, now seen corresponding path program 2 times [2023-08-30 11:48:55,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:55,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309363334] [2023-08-30 11:48:55,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:55,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:48:55,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:55,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309363334] [2023-08-30 11:48:55,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309363334] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:48:55,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769056017] [2023-08-30 11:48:55,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:48:55,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:48:55,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:48:55,928 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 11:48:55,930 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 11:48:56,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:48:56,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:48:56,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 11:48:56,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:48:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-30 11:48:56,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:48:56,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769056017] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:48:56,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:48:56,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-08-30 11:48:56,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009142205] [2023-08-30 11:48:56,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:48:56,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 11:48:56,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:56,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 11:48:56,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 11:48:56,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 300 [2023-08-30 11:48:56,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 120 transitions, 1196 flow. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:56,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:56,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 300 [2023-08-30 11:48:56,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:56,315 INFO L130 PetriNetUnfolder]: 1412/2549 cut-off events. [2023-08-30 11:48:56,315 INFO L131 PetriNetUnfolder]: For 21701/21737 co-relation queries the response was YES. [2023-08-30 11:48:56,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14973 conditions, 2549 events. 1412/2549 cut-off events. For 21701/21737 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 16015 event pairs, 796 based on Foata normal form. 129/2579 useless extension candidates. Maximal degree in co-relation 14931. Up to 2545 conditions per place. [2023-08-30 11:48:56,332 INFO L137 encePairwiseOnDemand]: 298/300 looper letters, 104 selfloop transitions, 1 changer transitions 7/113 dead transitions. [2023-08-30 11:48:56,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 113 transitions, 1312 flow [2023-08-30 11:48:56,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 11:48:56,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 11:48:56,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2023-08-30 11:48:56,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45222222222222225 [2023-08-30 11:48:56,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2023-08-30 11:48:56,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2023-08-30 11:48:56,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:56,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2023-08-30 11:48:56,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 11:48:56,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:56,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:56,336 INFO L175 Difference]: Start difference. First operand has 104 places, 120 transitions, 1196 flow. Second operand 3 states and 407 transitions. [2023-08-30 11:48:56,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 113 transitions, 1312 flow [2023-08-30 11:48:56,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 113 transitions, 1205 flow, removed 22 selfloop flow, removed 5 redundant places. [2023-08-30 11:48:56,383 INFO L231 Difference]: Finished difference. Result has 99 places, 106 transitions, 909 flow [2023-08-30 11:48:56,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=909, PETRI_PLACES=99, PETRI_TRANSITIONS=106} [2023-08-30 11:48:56,384 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 68 predicate places. [2023-08-30 11:48:56,384 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 106 transitions, 909 flow [2023-08-30 11:48:56,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:56,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:56,385 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:48:56,392 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 11:48:56,589 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 11:48:56,590 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:48:56,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:56,590 INFO L85 PathProgramCache]: Analyzing trace with hash -127741973, now seen corresponding path program 2 times [2023-08-30 11:48:56,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:56,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976225554] [2023-08-30 11:48:56,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:56,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:57,311 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 11:48:57,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:57,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976225554] [2023-08-30 11:48:57,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976225554] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:48:57,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137745898] [2023-08-30 11:48:57,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:48:57,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:48:57,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:48:57,313 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 11:48:57,327 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 11:48:57,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:48:57,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:48:57,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 11:48:57,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:48:57,430 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 11:48:57,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:48:57,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137745898] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:48:57,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:48:57,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2023-08-30 11:48:57,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084343767] [2023-08-30 11:48:57,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:48:57,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 11:48:57,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:57,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 11:48:57,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-08-30 11:48:57,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 300 [2023-08-30 11:48:57,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 106 transitions, 909 flow. Second operand has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:57,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:57,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 300 [2023-08-30 11:48:57,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:57,723 INFO L130 PetriNetUnfolder]: 1173/2210 cut-off events. [2023-08-30 11:48:57,723 INFO L131 PetriNetUnfolder]: For 16569/16588 co-relation queries the response was YES. [2023-08-30 11:48:57,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12245 conditions, 2210 events. 1173/2210 cut-off events. For 16569/16588 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 14112 event pairs, 339 based on Foata normal form. 29/2232 useless extension candidates. Maximal degree in co-relation 12206. Up to 2115 conditions per place. [2023-08-30 11:48:57,736 INFO L137 encePairwiseOnDemand]: 293/300 looper letters, 101 selfloop transitions, 11 changer transitions 6/119 dead transitions. [2023-08-30 11:48:57,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 119 transitions, 1199 flow [2023-08-30 11:48:57,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:48:57,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:48:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 633 transitions. [2023-08-30 11:48:57,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.422 [2023-08-30 11:48:57,738 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 633 transitions. [2023-08-30 11:48:57,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 633 transitions. [2023-08-30 11:48:57,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:57,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 633 transitions. [2023-08-30 11:48:57,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:57,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:57,741 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:57,741 INFO L175 Difference]: Start difference. First operand has 99 places, 106 transitions, 909 flow. Second operand 5 states and 633 transitions. [2023-08-30 11:48:57,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 119 transitions, 1199 flow [2023-08-30 11:48:57,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 119 transitions, 1198 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 11:48:57,776 INFO L231 Difference]: Finished difference. Result has 103 places, 105 transitions, 928 flow [2023-08-30 11:48:57,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=928, PETRI_PLACES=103, PETRI_TRANSITIONS=105} [2023-08-30 11:48:57,776 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 72 predicate places. [2023-08-30 11:48:57,777 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 105 transitions, 928 flow [2023-08-30 11:48:57,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:57,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:57,777 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:48:57,785 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 11:48:57,982 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 11:48:57,983 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:48:57,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:57,983 INFO L85 PathProgramCache]: Analyzing trace with hash -135164950, now seen corresponding path program 2 times [2023-08-30 11:48:57,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:57,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44744520] [2023-08-30 11:48:57,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:57,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:48:58,858 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 11:48:58,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:48:58,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44744520] [2023-08-30 11:48:58,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44744520] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:48:58,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515202643] [2023-08-30 11:48:58,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:48:58,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:48:58,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:48:58,860 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 11:48:58,863 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 11:48:58,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:48:58,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:48:58,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 11:48:58,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:48:59,004 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 11:48:59,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:48:59,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515202643] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:48:59,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:48:59,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2023-08-30 11:48:59,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025255002] [2023-08-30 11:48:59,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:48:59,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 11:48:59,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:48:59,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 11:48:59,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-08-30 11:48:59,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 300 [2023-08-30 11:48:59,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 105 transitions, 928 flow. Second operand has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:59,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:48:59,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 300 [2023-08-30 11:48:59,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:48:59,435 INFO L130 PetriNetUnfolder]: 1549/2744 cut-off events. [2023-08-30 11:48:59,436 INFO L131 PetriNetUnfolder]: For 25072/25095 co-relation queries the response was YES. [2023-08-30 11:48:59,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15912 conditions, 2744 events. 1549/2744 cut-off events. For 25072/25095 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 17023 event pairs, 174 based on Foata normal form. 89/2826 useless extension candidates. Maximal degree in co-relation 15870. Up to 2055 conditions per place. [2023-08-30 11:48:59,458 INFO L137 encePairwiseOnDemand]: 292/300 looper letters, 107 selfloop transitions, 32 changer transitions 0/140 dead transitions. [2023-08-30 11:48:59,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 140 transitions, 1509 flow [2023-08-30 11:48:59,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:48:59,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:48:59,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 640 transitions. [2023-08-30 11:48:59,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2023-08-30 11:48:59,460 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 640 transitions. [2023-08-30 11:48:59,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 640 transitions. [2023-08-30 11:48:59,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:48:59,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 640 transitions. [2023-08-30 11:48:59,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:59,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:59,463 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:59,463 INFO L175 Difference]: Start difference. First operand has 103 places, 105 transitions, 928 flow. Second operand 5 states and 640 transitions. [2023-08-30 11:48:59,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 140 transitions, 1509 flow [2023-08-30 11:48:59,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 140 transitions, 1475 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-30 11:48:59,519 INFO L231 Difference]: Finished difference. Result has 105 places, 110 transitions, 1079 flow [2023-08-30 11:48:59,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1079, PETRI_PLACES=105, PETRI_TRANSITIONS=110} [2023-08-30 11:48:59,520 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 74 predicate places. [2023-08-30 11:48:59,520 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 110 transitions, 1079 flow [2023-08-30 11:48:59,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:48:59,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:48:59,521 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:48:59,528 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 11:48:59,726 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 11:48:59,726 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:48:59,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:48:59,726 INFO L85 PathProgramCache]: Analyzing trace with hash -127715973, now seen corresponding path program 2 times [2023-08-30 11:48:59,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:48:59,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41198478] [2023-08-30 11:48:59,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:48:59,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:48:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:00,391 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 11:49:00,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:00,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41198478] [2023-08-30 11:49:00,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41198478] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:00,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622620842] [2023-08-30 11:49:00,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:49:00,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:00,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:00,397 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 11:49:00,402 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 11:49:00,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 11:49:00,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:49:00,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 11:49:00,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:00,535 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 11:49:00,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:49:00,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622620842] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:49:00,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:49:00,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2023-08-30 11:49:00,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590675558] [2023-08-30 11:49:00,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:00,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 11:49:00,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:00,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 11:49:00,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-08-30 11:49:00,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 300 [2023-08-30 11:49:00,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 110 transitions, 1079 flow. Second operand has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:00,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:00,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 300 [2023-08-30 11:49:00,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:00,976 INFO L130 PetriNetUnfolder]: 1460/2625 cut-off events. [2023-08-30 11:49:00,977 INFO L131 PetriNetUnfolder]: For 28093/28113 co-relation queries the response was YES. [2023-08-30 11:49:00,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16185 conditions, 2625 events. 1460/2625 cut-off events. For 28093/28113 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16465 event pairs, 186 based on Foata normal form. 92/2715 useless extension candidates. Maximal degree in co-relation 16142. Up to 1936 conditions per place. [2023-08-30 11:49:00,999 INFO L137 encePairwiseOnDemand]: 292/300 looper letters, 102 selfloop transitions, 30 changer transitions 0/133 dead transitions. [2023-08-30 11:49:00,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 133 transitions, 1492 flow [2023-08-30 11:49:01,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:49:01,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:49:01,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 639 transitions. [2023-08-30 11:49:01,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426 [2023-08-30 11:49:01,001 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 639 transitions. [2023-08-30 11:49:01,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 639 transitions. [2023-08-30 11:49:01,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:01,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 639 transitions. [2023-08-30 11:49:01,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.8) internal successors, (639), 5 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:01,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:01,005 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:01,005 INFO L175 Difference]: Start difference. First operand has 105 places, 110 transitions, 1079 flow. Second operand 5 states and 639 transitions. [2023-08-30 11:49:01,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 133 transitions, 1492 flow [2023-08-30 11:49:01,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 133 transitions, 1406 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-08-30 11:49:01,081 INFO L231 Difference]: Finished difference. Result has 105 places, 103 transitions, 970 flow [2023-08-30 11:49:01,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=970, PETRI_PLACES=105, PETRI_TRANSITIONS=103} [2023-08-30 11:49:01,081 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 74 predicate places. [2023-08-30 11:49:01,081 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 103 transitions, 970 flow [2023-08-30 11:49:01,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:01,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:01,082 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:01,091 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 11:49:01,287 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 11:49:01,287 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:49:01,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:01,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1342273889, now seen corresponding path program 3 times [2023-08-30 11:49:01,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:01,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213108509] [2023-08-30 11:49:01,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:01,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:01,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:01,867 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 11:49:01,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:01,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213108509] [2023-08-30 11:49:01,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213108509] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:01,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401314475] [2023-08-30 11:49:01,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:49:01,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:01,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:01,869 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 11:49:01,871 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 11:49:01,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 11:49:01,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:49:01,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 11:49:01,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:02,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:49:02,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:49:02,073 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 11:49:02,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:49:02,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401314475] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:49:02,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:49:02,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-08-30 11:49:02,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998556915] [2023-08-30 11:49:02,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:02,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:49:02,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:02,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:49:02,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-08-30 11:49:02,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 300 [2023-08-30 11:49:02,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 103 transitions, 970 flow. Second operand has 7 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:02,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:02,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 300 [2023-08-30 11:49:02,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:02,507 INFO L130 PetriNetUnfolder]: 1452/2617 cut-off events. [2023-08-30 11:49:02,508 INFO L131 PetriNetUnfolder]: For 23712/23732 co-relation queries the response was YES. [2023-08-30 11:49:02,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15517 conditions, 2617 events. 1452/2617 cut-off events. For 23712/23732 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16379 event pairs, 492 based on Foata normal form. 28/2595 useless extension candidates. Maximal degree in co-relation 15475. Up to 2519 conditions per place. [2023-08-30 11:49:02,531 INFO L137 encePairwiseOnDemand]: 294/300 looper letters, 95 selfloop transitions, 10 changer transitions 6/112 dead transitions. [2023-08-30 11:49:02,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 112 transitions, 1219 flow [2023-08-30 11:49:02,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:49:02,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:49:02,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 608 transitions. [2023-08-30 11:49:02,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053333333333333 [2023-08-30 11:49:02,533 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 608 transitions. [2023-08-30 11:49:02,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 608 transitions. [2023-08-30 11:49:02,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:02,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 608 transitions. [2023-08-30 11:49:02,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.6) internal successors, (608), 5 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:02,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:02,536 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:02,536 INFO L175 Difference]: Start difference. First operand has 105 places, 103 transitions, 970 flow. Second operand 5 states and 608 transitions. [2023-08-30 11:49:02,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 112 transitions, 1219 flow [2023-08-30 11:49:02,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 112 transitions, 1159 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 11:49:02,578 INFO L231 Difference]: Finished difference. Result has 105 places, 100 transitions, 911 flow [2023-08-30 11:49:02,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=911, PETRI_PLACES=105, PETRI_TRANSITIONS=100} [2023-08-30 11:49:02,578 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 74 predicate places. [2023-08-30 11:49:02,579 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 100 transitions, 911 flow [2023-08-30 11:49:02,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:02,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:02,579 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:02,584 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 11:49:02,784 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 11:49:02,784 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:49:02,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:02,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1367208956, now seen corresponding path program 3 times [2023-08-30 11:49:02,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:02,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573798149] [2023-08-30 11:49:02,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:02,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:03,641 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 11:49:03,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:03,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573798149] [2023-08-30 11:49:03,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573798149] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:03,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715043933] [2023-08-30 11:49:03,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:49:03,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:03,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:03,643 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 11:49:03,646 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 11:49:03,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 11:49:03,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:49:03,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 11:49:03,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:03,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:49:03,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:49:03,867 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 11:49:03,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:49:03,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715043933] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:49:03,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:49:03,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-08-30 11:49:03,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238214847] [2023-08-30 11:49:03,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:03,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:49:03,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:03,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:49:03,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-08-30 11:49:03,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 300 [2023-08-30 11:49:03,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 100 transitions, 911 flow. Second operand has 7 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:03,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:03,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 300 [2023-08-30 11:49:03,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:04,312 INFO L130 PetriNetUnfolder]: 1558/2753 cut-off events. [2023-08-30 11:49:04,313 INFO L131 PetriNetUnfolder]: For 25151/25171 co-relation queries the response was YES. [2023-08-30 11:49:04,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16328 conditions, 2753 events. 1558/2753 cut-off events. For 25151/25171 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17052 event pairs, 126 based on Foata normal form. 68/2771 useless extension candidates. Maximal degree in co-relation 16286. Up to 1422 conditions per place. [2023-08-30 11:49:04,332 INFO L137 encePairwiseOnDemand]: 293/300 looper letters, 77 selfloop transitions, 43 changer transitions 1/122 dead transitions. [2023-08-30 11:49:04,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 122 transitions, 1339 flow [2023-08-30 11:49:04,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:49:04,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:49:04,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 613 transitions. [2023-08-30 11:49:04,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4086666666666667 [2023-08-30 11:49:04,334 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 613 transitions. [2023-08-30 11:49:04,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 613 transitions. [2023-08-30 11:49:04,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:04,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 613 transitions. [2023-08-30 11:49:04,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:04,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:04,338 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:04,338 INFO L175 Difference]: Start difference. First operand has 105 places, 100 transitions, 911 flow. Second operand 5 states and 613 transitions. [2023-08-30 11:49:04,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 122 transitions, 1339 flow [2023-08-30 11:49:04,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 122 transitions, 1308 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-30 11:49:04,387 INFO L231 Difference]: Finished difference. Result has 104 places, 103 transitions, 1071 flow [2023-08-30 11:49:04,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1071, PETRI_PLACES=104, PETRI_TRANSITIONS=103} [2023-08-30 11:49:04,388 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 73 predicate places. [2023-08-30 11:49:04,388 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 103 transitions, 1071 flow [2023-08-30 11:49:04,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:04,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:04,389 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:04,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 11:49:04,594 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 11:49:04,594 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:49:04,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:04,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1367209009, now seen corresponding path program 3 times [2023-08-30 11:49:04,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:04,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276334348] [2023-08-30 11:49:04,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:04,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:05,332 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 11:49:05,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:05,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276334348] [2023-08-30 11:49:05,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276334348] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:05,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534544684] [2023-08-30 11:49:05,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:49:05,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:05,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:05,335 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 11:49:05,337 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 11:49:05,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 11:49:05,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:49:05,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 11:49:05,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:05,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:49:05,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:49:05,557 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 11:49:05,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:49:05,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534544684] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:49:05,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:49:05,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-08-30 11:49:05,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146129431] [2023-08-30 11:49:05,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:05,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 11:49:05,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:05,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 11:49:05,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-08-30 11:49:05,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 300 [2023-08-30 11:49:05,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 103 transitions, 1071 flow. Second operand has 7 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:05,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:05,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 300 [2023-08-30 11:49:05,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:06,057 INFO L130 PetriNetUnfolder]: 1498/2677 cut-off events. [2023-08-30 11:49:06,057 INFO L131 PetriNetUnfolder]: For 27697/27717 co-relation queries the response was YES. [2023-08-30 11:49:06,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17072 conditions, 2677 events. 1498/2677 cut-off events. For 27697/27717 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 16722 event pairs, 126 based on Foata normal form. 84/2711 useless extension candidates. Maximal degree in co-relation 17029. Up to 1346 conditions per place. [2023-08-30 11:49:06,072 INFO L137 encePairwiseOnDemand]: 293/300 looper letters, 77 selfloop transitions, 41 changer transitions 1/120 dead transitions. [2023-08-30 11:49:06,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 120 transitions, 1409 flow [2023-08-30 11:49:06,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:49:06,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:49:06,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 612 transitions. [2023-08-30 11:49:06,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.408 [2023-08-30 11:49:06,076 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 612 transitions. [2023-08-30 11:49:06,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 612 transitions. [2023-08-30 11:49:06,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:06,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 612 transitions. [2023-08-30 11:49:06,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.4) internal successors, (612), 5 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:06,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:06,079 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:06,079 INFO L175 Difference]: Start difference. First operand has 104 places, 103 transitions, 1071 flow. Second operand 5 states and 612 transitions. [2023-08-30 11:49:06,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 120 transitions, 1409 flow [2023-08-30 11:49:06,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 120 transitions, 1352 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-30 11:49:06,117 INFO L231 Difference]: Finished difference. Result has 104 places, 101 transitions, 1056 flow [2023-08-30 11:49:06,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1056, PETRI_PLACES=104, PETRI_TRANSITIONS=101} [2023-08-30 11:49:06,118 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 73 predicate places. [2023-08-30 11:49:06,118 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 101 transitions, 1056 flow [2023-08-30 11:49:06,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:06,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:06,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:06,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 11:49:06,319 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 11:49:06,319 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:49:06,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:06,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1364709197, now seen corresponding path program 1 times [2023-08-30 11:49:06,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:06,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542709921] [2023-08-30 11:49:06,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:06,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:49:06,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:06,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542709921] [2023-08-30 11:49:06,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542709921] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:49:06,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 11:49:06,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 11:49:06,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61915095] [2023-08-30 11:49:06,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:06,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 11:49:06,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:06,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 11:49:06,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 11:49:06,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 300 [2023-08-30 11:49:06,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 101 transitions, 1056 flow. Second operand has 4 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:06,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:06,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 300 [2023-08-30 11:49:06,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:06,869 INFO L130 PetriNetUnfolder]: 1801/3398 cut-off events. [2023-08-30 11:49:06,870 INFO L131 PetriNetUnfolder]: For 34690/34710 co-relation queries the response was YES. [2023-08-30 11:49:06,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21184 conditions, 3398 events. 1801/3398 cut-off events. For 34690/34710 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22749 event pairs, 381 based on Foata normal form. 294/3644 useless extension candidates. Maximal degree in co-relation 21143. Up to 2443 conditions per place. [2023-08-30 11:49:06,888 INFO L137 encePairwiseOnDemand]: 294/300 looper letters, 88 selfloop transitions, 46 changer transitions 1/136 dead transitions. [2023-08-30 11:49:06,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 136 transitions, 1709 flow [2023-08-30 11:49:06,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:49:06,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:49:06,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 549 transitions. [2023-08-30 11:49:06,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575 [2023-08-30 11:49:06,889 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 549 transitions. [2023-08-30 11:49:06,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 549 transitions. [2023-08-30 11:49:06,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:06,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 549 transitions. [2023-08-30 11:49:06,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:06,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:06,891 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:06,891 INFO L175 Difference]: Start difference. First operand has 104 places, 101 transitions, 1056 flow. Second operand 4 states and 549 transitions. [2023-08-30 11:49:06,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 136 transitions, 1709 flow [2023-08-30 11:49:06,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 136 transitions, 1597 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-30 11:49:06,946 INFO L231 Difference]: Finished difference. Result has 105 places, 121 transitions, 1428 flow [2023-08-30 11:49:06,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1428, PETRI_PLACES=105, PETRI_TRANSITIONS=121} [2023-08-30 11:49:06,946 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 74 predicate places. [2023-08-30 11:49:06,946 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 121 transitions, 1428 flow [2023-08-30 11:49:06,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:06,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:06,947 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:06,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 11:49:06,947 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:49:06,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:06,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1343609976, now seen corresponding path program 3 times [2023-08-30 11:49:06,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:06,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99668570] [2023-08-30 11:49:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:06,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:07,483 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 11:49:07,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:07,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99668570] [2023-08-30 11:49:07,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99668570] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:07,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587882573] [2023-08-30 11:49:07,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:49:07,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:07,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:07,486 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 11:49:07,488 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 11:49:07,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 11:49:07,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:49:07,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 11:49:07,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:07,637 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 11:49:07,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 11:49:07,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587882573] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 11:49:07,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 11:49:07,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2023-08-30 11:49:07,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358883856] [2023-08-30 11:49:07,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:07,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 11:49:07,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:07,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 11:49:07,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-08-30 11:49:07,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 300 [2023-08-30 11:49:07,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 121 transitions, 1428 flow. Second operand has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:07,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:07,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 300 [2023-08-30 11:49:07,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:08,066 INFO L130 PetriNetUnfolder]: 1794/3379 cut-off events. [2023-08-30 11:49:08,066 INFO L131 PetriNetUnfolder]: For 37448/37468 co-relation queries the response was YES. [2023-08-30 11:49:08,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23035 conditions, 3379 events. 1794/3379 cut-off events. For 37448/37468 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 22393 event pairs, 584 based on Foata normal form. 28/3359 useless extension candidates. Maximal degree in co-relation 22992. Up to 3305 conditions per place. [2023-08-30 11:49:08,085 INFO L137 encePairwiseOnDemand]: 295/300 looper letters, 115 selfloop transitions, 9 changer transitions 1/126 dead transitions. [2023-08-30 11:49:08,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 126 transitions, 1685 flow [2023-08-30 11:49:08,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:49:08,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:49:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 507 transitions. [2023-08-30 11:49:08,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225 [2023-08-30 11:49:08,086 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 507 transitions. [2023-08-30 11:49:08,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 507 transitions. [2023-08-30 11:49:08,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:08,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 507 transitions. [2023-08-30 11:49:08,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.75) internal successors, (507), 4 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:08,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:08,088 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:08,088 INFO L175 Difference]: Start difference. First operand has 105 places, 121 transitions, 1428 flow. Second operand 4 states and 507 transitions. [2023-08-30 11:49:08,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 126 transitions, 1685 flow [2023-08-30 11:49:08,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 126 transitions, 1597 flow, removed 44 selfloop flow, removed 0 redundant places. [2023-08-30 11:49:08,192 INFO L231 Difference]: Finished difference. Result has 106 places, 120 transitions, 1348 flow [2023-08-30 11:49:08,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1348, PETRI_PLACES=106, PETRI_TRANSITIONS=120} [2023-08-30 11:49:08,193 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 75 predicate places. [2023-08-30 11:49:08,193 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 120 transitions, 1348 flow [2023-08-30 11:49:08,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:08,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:08,193 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:08,200 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 11:49:08,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:08,398 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:49:08,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:08,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1334287049, now seen corresponding path program 4 times [2023-08-30 11:49:08,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:08,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117551270] [2023-08-30 11:49:08,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:08,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:09,085 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 11:49:09,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:09,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117551270] [2023-08-30 11:49:09,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117551270] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:09,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255662839] [2023-08-30 11:49:09,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:49:09,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:09,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:09,088 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 11:49:09,118 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 11:49:09,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:49:09,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:49:09,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 11:49:09,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:09,281 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 11:49:09,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:49:09,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:49:09,306 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 11:49:09,335 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 11:49:09,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255662839] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:09,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 11:49:09,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 5] total 15 [2023-08-30 11:49:09,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954632455] [2023-08-30 11:49:09,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:09,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 11:49:09,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:09,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 11:49:09,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-08-30 11:49:09,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 300 [2023-08-30 11:49:09,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 120 transitions, 1348 flow. Second operand has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:09,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:09,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 300 [2023-08-30 11:49:09,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:09,803 INFO L130 PetriNetUnfolder]: 1730/3291 cut-off events. [2023-08-30 11:49:09,803 INFO L131 PetriNetUnfolder]: For 28371/28391 co-relation queries the response was YES. [2023-08-30 11:49:09,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20458 conditions, 3291 events. 1730/3291 cut-off events. For 28371/28391 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21931 event pairs, 222 based on Foata normal form. 28/3319 useless extension candidates. Maximal degree in co-relation 20413. Up to 2854 conditions per place. [2023-08-30 11:49:09,822 INFO L137 encePairwiseOnDemand]: 292/300 looper letters, 104 selfloop transitions, 24 changer transitions 1/130 dead transitions. [2023-08-30 11:49:09,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 130 transitions, 1672 flow [2023-08-30 11:49:09,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:49:09,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:49:09,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 511 transitions. [2023-08-30 11:49:09,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42583333333333334 [2023-08-30 11:49:09,824 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 511 transitions. [2023-08-30 11:49:09,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 511 transitions. [2023-08-30 11:49:09,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:09,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 511 transitions. [2023-08-30 11:49:09,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:09,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:09,826 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:09,826 INFO L175 Difference]: Start difference. First operand has 106 places, 120 transitions, 1348 flow. Second operand 4 states and 511 transitions. [2023-08-30 11:49:09,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 130 transitions, 1672 flow [2023-08-30 11:49:09,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 130 transitions, 1657 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 11:49:09,875 INFO L231 Difference]: Finished difference. Result has 107 places, 116 transitions, 1320 flow [2023-08-30 11:49:09,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1320, PETRI_PLACES=107, PETRI_TRANSITIONS=116} [2023-08-30 11:49:09,876 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 76 predicate places. [2023-08-30 11:49:09,876 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 116 transitions, 1320 flow [2023-08-30 11:49:09,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:09,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:09,876 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:09,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-30 11:49:10,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:10,077 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:49:10,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:10,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1343610813, now seen corresponding path program 4 times [2023-08-30 11:49:10,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:10,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094431817] [2023-08-30 11:49:10,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:10,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:10,736 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 11:49:10,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:10,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094431817] [2023-08-30 11:49:10,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094431817] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:10,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788422752] [2023-08-30 11:49:10,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:49:10,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:10,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:10,741 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 11:49:10,769 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 11:49:10,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:49:10,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:49:10,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 11:49:10,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:10,929 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 11:49:10,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:49:10,953 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:49:10,953 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 11:49:10,987 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 11:49:10,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788422752] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:10,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 11:49:10,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 5] total 15 [2023-08-30 11:49:10,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840435795] [2023-08-30 11:49:10,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 11:49:10,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 11:49:10,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:10,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 11:49:10,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-08-30 11:49:11,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 300 [2023-08-30 11:49:11,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 116 transitions, 1320 flow. Second operand has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:11,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:11,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 300 [2023-08-30 11:49:11,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:11,417 INFO L130 PetriNetUnfolder]: 1664/3184 cut-off events. [2023-08-30 11:49:11,417 INFO L131 PetriNetUnfolder]: For 28977/28997 co-relation queries the response was YES. [2023-08-30 11:49:11,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19699 conditions, 3184 events. 1664/3184 cut-off events. For 28977/28997 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 21300 event pairs, 222 based on Foata normal form. 68/3252 useless extension candidates. Maximal degree in co-relation 19654. Up to 2780 conditions per place. [2023-08-30 11:49:11,437 INFO L137 encePairwiseOnDemand]: 294/300 looper letters, 104 selfloop transitions, 22 changer transitions 0/127 dead transitions. [2023-08-30 11:49:11,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 127 transitions, 1632 flow [2023-08-30 11:49:11,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 11:49:11,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 11:49:11,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 509 transitions. [2023-08-30 11:49:11,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4241666666666667 [2023-08-30 11:49:11,439 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 509 transitions. [2023-08-30 11:49:11,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 509 transitions. [2023-08-30 11:49:11,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:11,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 509 transitions. [2023-08-30 11:49:11,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:11,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:11,441 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:11,441 INFO L175 Difference]: Start difference. First operand has 107 places, 116 transitions, 1320 flow. Second operand 4 states and 509 transitions. [2023-08-30 11:49:11,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 127 transitions, 1632 flow [2023-08-30 11:49:11,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 127 transitions, 1539 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-08-30 11:49:11,506 INFO L231 Difference]: Finished difference. Result has 99 places, 114 transitions, 1225 flow [2023-08-30 11:49:11,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1225, PETRI_PLACES=99, PETRI_TRANSITIONS=114} [2023-08-30 11:49:11,507 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 68 predicate places. [2023-08-30 11:49:11,507 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 114 transitions, 1225 flow [2023-08-30 11:49:11,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:11,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:11,508 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:11,515 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 11:49:11,713 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,SelfDestructingSolverStorable25 [2023-08-30 11:49:11,713 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:49:11,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:11,713 INFO L85 PathProgramCache]: Analyzing trace with hash -784322498, now seen corresponding path program 1 times [2023-08-30 11:49:11,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:11,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233951484] [2023-08-30 11:49:11,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:11,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:11,787 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 11:49:11,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:11,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233951484] [2023-08-30 11:49:11,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233951484] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:11,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378664152] [2023-08-30 11:49:11,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:11,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:11,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:11,793 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 11:49:11,796 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 11:49:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:11,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 11:49:11,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:49:11,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:49:11,974 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 11:49:11,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378664152] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:49:11,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:49:11,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 11:49:11,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630813229] [2023-08-30 11:49:11,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:49:11,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 11:49:11,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:11,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 11:49:11,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-30 11:49:12,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 300 [2023-08-30 11:49:12,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 114 transitions, 1225 flow. Second operand has 12 states, 12 states have (on average 123.75) internal successors, (1485), 12 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:12,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:12,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 300 [2023-08-30 11:49:12,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:12,397 INFO L130 PetriNetUnfolder]: 1191/2319 cut-off events. [2023-08-30 11:49:12,397 INFO L131 PetriNetUnfolder]: For 18572/18592 co-relation queries the response was YES. [2023-08-30 11:49:12,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14096 conditions, 2319 events. 1191/2319 cut-off events. For 18572/18592 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14467 event pairs, 708 based on Foata normal form. 35/2354 useless extension candidates. Maximal degree in co-relation 14057. Up to 2281 conditions per place. [2023-08-30 11:49:12,409 INFO L137 encePairwiseOnDemand]: 296/300 looper letters, 71 selfloop transitions, 3 changer transitions 16/91 dead transitions. [2023-08-30 11:49:12,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 91 transitions, 1127 flow [2023-08-30 11:49:12,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 11:49:12,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 11:49:12,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 762 transitions. [2023-08-30 11:49:12,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42333333333333334 [2023-08-30 11:49:12,410 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 762 transitions. [2023-08-30 11:49:12,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 762 transitions. [2023-08-30 11:49:12,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:12,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 762 transitions. [2023-08-30 11:49:12,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 127.0) internal successors, (762), 6 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:12,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 300.0) internal successors, (2100), 7 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:12,412 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 300.0) internal successors, (2100), 7 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:12,412 INFO L175 Difference]: Start difference. First operand has 99 places, 114 transitions, 1225 flow. Second operand 6 states and 762 transitions. [2023-08-30 11:49:12,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 91 transitions, 1127 flow [2023-08-30 11:49:12,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 91 transitions, 1046 flow, removed 17 selfloop flow, removed 8 redundant places. [2023-08-30 11:49:12,444 INFO L231 Difference]: Finished difference. Result has 84 places, 75 transitions, 738 flow [2023-08-30 11:49:12,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=738, PETRI_PLACES=84, PETRI_TRANSITIONS=75} [2023-08-30 11:49:12,444 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2023-08-30 11:49:12,445 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 738 flow [2023-08-30 11:49:12,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 123.75) internal successors, (1485), 12 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:12,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:12,445 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:12,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-30 11:49:12,645 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,SelfDestructingSolverStorable26 [2023-08-30 11:49:12,646 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:49:12,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:12,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1822530941, now seen corresponding path program 2 times [2023-08-30 11:49:12,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:12,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796290873] [2023-08-30 11:49:12,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:12,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:13,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:13,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796290873] [2023-08-30 11:49:13,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796290873] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:13,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028867169] [2023-08-30 11:49:13,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:49:13,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:13,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:13,089 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 11:49:13,091 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 11:49:13,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:49:13,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:49:13,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 11:49:13,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:49:13,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:49:13,410 INFO L321 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-08-30 11:49:13,411 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 48 treesize of output 37 [2023-08-30 11:49:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:49:13,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028867169] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:49:13,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:49:13,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 18 [2023-08-30 11:49:13,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415882657] [2023-08-30 11:49:13,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:49:13,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 11:49:13,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:13,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 11:49:13,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-08-30 11:49:13,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-08-30 11:49:13,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 738 flow. Second operand has 20 states, 20 states have (on average 114.5) internal successors, (2290), 20 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:13,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:13,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-08-30 11:49:13,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:15,039 INFO L130 PetriNetUnfolder]: 1994/3657 cut-off events. [2023-08-30 11:49:15,039 INFO L131 PetriNetUnfolder]: For 24338/24354 co-relation queries the response was YES. [2023-08-30 11:49:15,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20931 conditions, 3657 events. 1994/3657 cut-off events. For 24338/24354 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23966 event pairs, 289 based on Foata normal form. 98/3755 useless extension candidates. Maximal degree in co-relation 20897. Up to 2204 conditions per place. [2023-08-30 11:49:15,061 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 143 selfloop transitions, 84 changer transitions 1/229 dead transitions. [2023-08-30 11:49:15,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 229 transitions, 2373 flow [2023-08-30 11:49:15,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 11:49:15,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 11:49:15,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3322 transitions. [2023-08-30 11:49:15,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3954761904761905 [2023-08-30 11:49:15,107 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3322 transitions. [2023-08-30 11:49:15,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3322 transitions. [2023-08-30 11:49:15,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:15,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3322 transitions. [2023-08-30 11:49:15,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 118.64285714285714) internal successors, (3322), 28 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:15,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 300.0) internal successors, (8700), 29 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:15,117 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 300.0) internal successors, (8700), 29 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:15,117 INFO L175 Difference]: Start difference. First operand has 84 places, 75 transitions, 738 flow. Second operand 28 states and 3322 transitions. [2023-08-30 11:49:15,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 229 transitions, 2373 flow [2023-08-30 11:49:15,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 229 transitions, 2311 flow, removed 28 selfloop flow, removed 6 redundant places. [2023-08-30 11:49:15,185 INFO L231 Difference]: Finished difference. Result has 102 places, 133 transitions, 1666 flow [2023-08-30 11:49:15,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1666, PETRI_PLACES=102, PETRI_TRANSITIONS=133} [2023-08-30 11:49:15,185 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 71 predicate places. [2023-08-30 11:49:15,186 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 133 transitions, 1666 flow [2023-08-30 11:49:15,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 114.5) internal successors, (2290), 20 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:15,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:15,186 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:15,192 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 11:49:15,391 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,SelfDestructingSolverStorable27 [2023-08-30 11:49:15,392 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:49:15,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:15,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1819042458, now seen corresponding path program 2 times [2023-08-30 11:49:15,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:15,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967556553] [2023-08-30 11:49:15,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:15,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:15,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:15,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967556553] [2023-08-30 11:49:15,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967556553] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:15,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026779151] [2023-08-30 11:49:15,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:49:15,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:15,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:15,924 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 11:49:15,927 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 11:49:16,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:49:16,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:49:16,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 11:49:16,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:16,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 11:49:16,160 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 11:49:16,193 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 11:49:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:16,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:49:16,832 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:49:16,833 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 63 treesize of output 51 [2023-08-30 11:49:16,845 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 11:49:16,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 140 [2023-08-30 11:49:16,857 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 11:49:16,858 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 135 treesize of output 109 [2023-08-30 11:49:16,870 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 11:49:16,870 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 84 treesize of output 71 [2023-08-30 11:49:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:16,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026779151] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:49:16,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:49:16,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2023-08-30 11:49:16,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541882087] [2023-08-30 11:49:16,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:49:16,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 11:49:17,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:17,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 11:49:17,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=545, Unknown=1, NotChecked=0, Total=702 [2023-08-30 11:49:17,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 11:49:17,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 133 transitions, 1666 flow. Second operand has 27 states, 27 states have (on average 90.33333333333333) internal successors, (2439), 27 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:17,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:17,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 11:49:17,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:19,786 INFO L130 PetriNetUnfolder]: 2177/3992 cut-off events. [2023-08-30 11:49:19,786 INFO L131 PetriNetUnfolder]: For 37343/37359 co-relation queries the response was YES. [2023-08-30 11:49:19,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25447 conditions, 3992 events. 2177/3992 cut-off events. For 37343/37359 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 26646 event pairs, 668 based on Foata normal form. 307/4299 useless extension candidates. Maximal degree in co-relation 25408. Up to 2267 conditions per place. [2023-08-30 11:49:19,809 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 193 selfloop transitions, 117 changer transitions 8/319 dead transitions. [2023-08-30 11:49:19,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 319 transitions, 4195 flow [2023-08-30 11:49:19,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 11:49:19,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 11:49:19,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2567 transitions. [2023-08-30 11:49:19,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3169135802469136 [2023-08-30 11:49:19,813 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2567 transitions. [2023-08-30 11:49:19,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2567 transitions. [2023-08-30 11:49:19,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:19,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2567 transitions. [2023-08-30 11:49:19,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 95.07407407407408) internal successors, (2567), 27 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:19,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 300.0) internal successors, (8400), 28 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:19,822 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 300.0) internal successors, (8400), 28 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:19,823 INFO L175 Difference]: Start difference. First operand has 102 places, 133 transitions, 1666 flow. Second operand 27 states and 2567 transitions. [2023-08-30 11:49:19,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 319 transitions, 4195 flow [2023-08-30 11:49:19,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 319 transitions, 3689 flow, removed 241 selfloop flow, removed 4 redundant places. [2023-08-30 11:49:19,903 INFO L231 Difference]: Finished difference. Result has 136 places, 204 transitions, 2777 flow [2023-08-30 11:49:19,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2777, PETRI_PLACES=136, PETRI_TRANSITIONS=204} [2023-08-30 11:49:19,904 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 105 predicate places. [2023-08-30 11:49:19,904 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 204 transitions, 2777 flow [2023-08-30 11:49:19,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 90.33333333333333) internal successors, (2439), 27 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:19,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:19,904 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:19,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-08-30 11:49:20,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:20,106 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:49:20,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:20,106 INFO L85 PathProgramCache]: Analyzing trace with hash 419810221, now seen corresponding path program 1 times [2023-08-30 11:49:20,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:20,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004653564] [2023-08-30 11:49:20,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:20,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:20,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:20,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004653564] [2023-08-30 11:49:20,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004653564] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:20,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123405087] [2023-08-30 11:49:20,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:20,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:20,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:20,637 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 11:49:20,661 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 11:49:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:20,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 11:49:20,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:20,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 11:49:20,850 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 21 treesize of output 20 [2023-08-30 11:49:20,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:49:20,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:49:20,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:49:20,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-30 11:49:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:21,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:49:21,516 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:49:21,517 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 115 treesize of output 80 [2023-08-30 11:49:21,540 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:49:21,541 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 11:49:21,564 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:49:21,564 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 11:49:21,579 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:49:21,579 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 11:49:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:22,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123405087] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:49:22,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:49:22,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 11:49:22,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508699522] [2023-08-30 11:49:22,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:49:22,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 11:49:22,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:22,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 11:49:22,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=686, Unknown=4, NotChecked=0, Total=812 [2023-08-30 11:49:24,739 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 11:49:26,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:49:28,903 WARN L539 Checker$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 11:49:30,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:49:33,080 WARN L539 Checker$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 11:49:35,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:49:35,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 11:49:35,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 204 transitions, 2777 flow. Second operand has 29 states, 29 states have (on average 90.24137931034483) internal successors, (2617), 29 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:35,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:35,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 11:49:35,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:37,914 WARN L539 Checker$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 11:49:39,570 INFO L130 PetriNetUnfolder]: 1521/2930 cut-off events. [2023-08-30 11:49:39,571 INFO L131 PetriNetUnfolder]: For 44460/44474 co-relation queries the response was YES. [2023-08-30 11:49:39,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19711 conditions, 2930 events. 1521/2930 cut-off events. For 44460/44474 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 19177 event pairs, 659 based on Foata normal form. 179/3025 useless extension candidates. Maximal degree in co-relation 19656. Up to 2249 conditions per place. [2023-08-30 11:49:39,589 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 165 selfloop transitions, 87 changer transitions 11/264 dead transitions. [2023-08-30 11:49:39,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 264 transitions, 3381 flow [2023-08-30 11:49:39,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 11:49:39,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 11:49:39,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2904 transitions. [2023-08-30 11:49:39,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31225806451612903 [2023-08-30 11:49:39,593 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2904 transitions. [2023-08-30 11:49:39,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2904 transitions. [2023-08-30 11:49:39,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:39,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2904 transitions. [2023-08-30 11:49:39,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 93.6774193548387) internal successors, (2904), 31 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:39,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 300.0) internal successors, (9600), 32 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:39,604 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 300.0) internal successors, (9600), 32 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:39,604 INFO L175 Difference]: Start difference. First operand has 136 places, 204 transitions, 2777 flow. Second operand 31 states and 2904 transitions. [2023-08-30 11:49:39,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 264 transitions, 3381 flow [2023-08-30 11:49:39,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 264 transitions, 3065 flow, removed 128 selfloop flow, removed 16 redundant places. [2023-08-30 11:49:39,702 INFO L231 Difference]: Finished difference. Result has 160 places, 188 transitions, 2545 flow [2023-08-30 11:49:39,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1728, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2545, PETRI_PLACES=160, PETRI_TRANSITIONS=188} [2023-08-30 11:49:39,702 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 129 predicate places. [2023-08-30 11:49:39,702 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 188 transitions, 2545 flow [2023-08-30 11:49:39,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 90.24137931034483) internal successors, (2617), 29 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:39,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:39,703 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:39,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-30 11:49:39,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:39,903 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:49:39,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:39,904 INFO L85 PathProgramCache]: Analyzing trace with hash 667395804, now seen corresponding path program 1 times [2023-08-30 11:49:39,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:39,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657729952] [2023-08-30 11:49:39,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:39,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:39,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:40,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:40,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657729952] [2023-08-30 11:49:40,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657729952] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:40,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024116721] [2023-08-30 11:49:40,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:40,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:40,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:40,525 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 11:49:40,532 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 11:49:40,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:40,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 11:49:40,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:40,697 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 11:49:40,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2023-08-30 11:49:40,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:49:40,820 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 11:49:41,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:49:41,001 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 11:49:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:41,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:49:41,293 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_934 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_934) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ (select .cse0 (+ .cse1 c_~q~0.offset 4)) (select .cse0 (+ .cse1 c_~q~0.offset)))) 2147483648)) is different from false [2023-08-30 11:49:41,632 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:49:41,632 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 110 treesize of output 75 [2023-08-30 11:49:41,658 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:49:41,658 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 265 treesize of output 259 [2023-08-30 11:49:41,678 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:49:41,679 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 63 treesize of output 62 [2023-08-30 11:49:41,685 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:49:41,686 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 46 treesize of output 20 [2023-08-30 11:49:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:42,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024116721] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:49:42,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:49:42,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 11:49:42,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945370574] [2023-08-30 11:49:42,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:49:42,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 11:49:42,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:42,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 11:49:42,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=663, Unknown=2, NotChecked=52, Total=812 [2023-08-30 11:49:42,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 11:49:42,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 188 transitions, 2545 flow. Second operand has 29 states, 29 states have (on average 90.24137931034483) internal successors, (2617), 29 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:42,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:42,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 11:49:42,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:45,027 INFO L130 PetriNetUnfolder]: 1504/2926 cut-off events. [2023-08-30 11:49:45,028 INFO L131 PetriNetUnfolder]: For 38710/38724 co-relation queries the response was YES. [2023-08-30 11:49:45,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19967 conditions, 2926 events. 1504/2926 cut-off events. For 38710/38724 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19422 event pairs, 645 based on Foata normal form. 48/2888 useless extension candidates. Maximal degree in co-relation 19906. Up to 2290 conditions per place. [2023-08-30 11:49:45,051 INFO L137 encePairwiseOnDemand]: 289/300 looper letters, 146 selfloop transitions, 82 changer transitions 5/234 dead transitions. [2023-08-30 11:49:45,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 234 transitions, 3264 flow [2023-08-30 11:49:45,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 11:49:45,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 11:49:45,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1509 transitions. [2023-08-30 11:49:45,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.314375 [2023-08-30 11:49:45,054 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1509 transitions. [2023-08-30 11:49:45,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1509 transitions. [2023-08-30 11:49:45,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:45,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1509 transitions. [2023-08-30 11:49:45,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.3125) internal successors, (1509), 16 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:45,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 300.0) internal successors, (5100), 17 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:45,058 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 300.0) internal successors, (5100), 17 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:45,058 INFO L175 Difference]: Start difference. First operand has 160 places, 188 transitions, 2545 flow. Second operand 16 states and 1509 transitions. [2023-08-30 11:49:45,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 234 transitions, 3264 flow [2023-08-30 11:49:45,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 234 transitions, 3022 flow, removed 97 selfloop flow, removed 12 redundant places. [2023-08-30 11:49:45,172 INFO L231 Difference]: Finished difference. Result has 165 places, 200 transitions, 2670 flow [2023-08-30 11:49:45,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2670, PETRI_PLACES=165, PETRI_TRANSITIONS=200} [2023-08-30 11:49:45,172 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 134 predicate places. [2023-08-30 11:49:45,172 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 200 transitions, 2670 flow [2023-08-30 11:49:45,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 90.24137931034483) internal successors, (2617), 29 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:45,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:45,173 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:45,177 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 11:49:45,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-30 11:49:45,374 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:49:45,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:45,374 INFO L85 PathProgramCache]: Analyzing trace with hash 419810274, now seen corresponding path program 2 times [2023-08-30 11:49:45,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:45,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944433383] [2023-08-30 11:49:45,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:45,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:45,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:45,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944433383] [2023-08-30 11:49:45,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944433383] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:45,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771999450] [2023-08-30 11:49:45,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:49:45,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:45,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:45,733 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 11:49:45,758 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 11:49:45,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:49:45,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:49:45,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-30 11:49:45,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:45,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 11:49:45,937 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 11:49:45,989 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 11:49:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:46,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:49:46,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:49:46,414 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 61 treesize of output 49 [2023-08-30 11:49:46,426 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 11:49:46,427 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 308 treesize of output 279 [2023-08-30 11:49:46,440 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 11:49:46,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 80 [2023-08-30 11:49:46,455 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 11:49:46,455 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 93 treesize of output 67 [2023-08-30 11:49:46,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:46,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771999450] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:49:46,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:49:46,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-08-30 11:49:46,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509647815] [2023-08-30 11:49:46,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:49:46,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 11:49:46,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:46,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 11:49:46,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=498, Unknown=4, NotChecked=0, Total=600 [2023-08-30 11:49:48,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:49:50,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:49:52,920 WARN L539 Checker$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 11:49:55,171 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 11:49:55,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 11:49:55,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 200 transitions, 2670 flow. Second operand has 25 states, 25 states have (on average 90.44) internal successors, (2261), 25 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:55,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:55,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 11:49:55,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:56,350 INFO L130 PetriNetUnfolder]: 1327/2539 cut-off events. [2023-08-30 11:49:56,350 INFO L131 PetriNetUnfolder]: For 27173/27187 co-relation queries the response was YES. [2023-08-30 11:49:56,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17188 conditions, 2539 events. 1327/2539 cut-off events. For 27173/27187 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15977 event pairs, 644 based on Foata normal form. 40/2493 useless extension candidates. Maximal degree in co-relation 17127. Up to 2283 conditions per place. [2023-08-30 11:49:56,365 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 123 selfloop transitions, 40 changer transitions 7/171 dead transitions. [2023-08-30 11:49:56,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 171 transitions, 2416 flow [2023-08-30 11:49:56,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 11:49:56,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 11:49:56,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1308 transitions. [2023-08-30 11:49:56,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31142857142857144 [2023-08-30 11:49:56,368 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1308 transitions. [2023-08-30 11:49:56,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1308 transitions. [2023-08-30 11:49:56,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:56,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1308 transitions. [2023-08-30 11:49:56,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 93.42857142857143) internal successors, (1308), 14 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:56,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 300.0) internal successors, (4500), 15 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:56,373 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 300.0) internal successors, (4500), 15 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:56,374 INFO L175 Difference]: Start difference. First operand has 165 places, 200 transitions, 2670 flow. Second operand 14 states and 1308 transitions. [2023-08-30 11:49:56,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 171 transitions, 2416 flow [2023-08-30 11:49:56,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 171 transitions, 2219 flow, removed 59 selfloop flow, removed 15 redundant places. [2023-08-30 11:49:56,467 INFO L231 Difference]: Finished difference. Result has 159 places, 150 transitions, 1862 flow [2023-08-30 11:49:56,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1816, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1862, PETRI_PLACES=159, PETRI_TRANSITIONS=150} [2023-08-30 11:49:56,467 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 128 predicate places. [2023-08-30 11:49:56,468 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 150 transitions, 1862 flow [2023-08-30 11:49:56,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 90.44) internal successors, (2261), 25 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:56,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:56,468 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:56,473 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 11:49:56,668 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,SelfDestructingSolverStorable31 [2023-08-30 11:49:56,669 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:49:56,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:56,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1029802873, now seen corresponding path program 2 times [2023-08-30 11:49:56,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:56,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708458087] [2023-08-30 11:49:56,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:56,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:57,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:57,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708458087] [2023-08-30 11:49:57,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708458087] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:57,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511408606] [2023-08-30 11:49:57,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:49:57,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:57,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:57,088 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 11:49:57,090 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 11:49:57,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:49:57,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:49:57,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 11:49:57,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:57,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:49:57,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:49:57,309 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 11:49:57,309 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 15 [2023-08-30 11:49:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:49:57,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511408606] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:49:57,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:49:57,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 16 [2023-08-30 11:49:57,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146268249] [2023-08-30 11:49:57,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:49:57,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 11:49:57,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:49:57,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 11:49:57,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-08-30 11:49:57,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-08-30 11:49:57,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 150 transitions, 1862 flow. Second operand has 18 states, 18 states have (on average 114.72222222222223) internal successors, (2065), 18 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:57,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:49:57,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-08-30 11:49:57,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:49:58,553 INFO L130 PetriNetUnfolder]: 1608/3051 cut-off events. [2023-08-30 11:49:58,553 INFO L131 PetriNetUnfolder]: For 36150/36164 co-relation queries the response was YES. [2023-08-30 11:49:58,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20526 conditions, 3051 events. 1608/3051 cut-off events. For 36150/36164 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 20002 event pairs, 212 based on Foata normal form. 140/3139 useless extension candidates. Maximal degree in co-relation 20471. Up to 997 conditions per place. [2023-08-30 11:49:58,577 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 94 selfloop transitions, 111 changer transitions 14/220 dead transitions. [2023-08-30 11:49:58,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 220 transitions, 2949 flow [2023-08-30 11:49:58,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 11:49:58,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 11:49:58,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2026 transitions. [2023-08-30 11:49:58,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39725490196078433 [2023-08-30 11:49:58,579 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2026 transitions. [2023-08-30 11:49:58,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2026 transitions. [2023-08-30 11:49:58,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:49:58,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2026 transitions. [2023-08-30 11:49:58,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 119.17647058823529) internal successors, (2026), 17 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:58,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 300.0) internal successors, (5400), 18 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:58,584 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 300.0) internal successors, (5400), 18 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:58,584 INFO L175 Difference]: Start difference. First operand has 159 places, 150 transitions, 1862 flow. Second operand 17 states and 2026 transitions. [2023-08-30 11:49:58,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 220 transitions, 2949 flow [2023-08-30 11:49:58,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 220 transitions, 2868 flow, removed 17 selfloop flow, removed 9 redundant places. [2023-08-30 11:49:58,688 INFO L231 Difference]: Finished difference. Result has 161 places, 154 transitions, 2185 flow [2023-08-30 11:49:58,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1741, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2185, PETRI_PLACES=161, PETRI_TRANSITIONS=154} [2023-08-30 11:49:58,688 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 130 predicate places. [2023-08-30 11:49:58,688 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 154 transitions, 2185 flow [2023-08-30 11:49:58,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 114.72222222222223) internal successors, (2065), 18 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:49:58,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:49:58,689 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:49:58,693 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 11:49:58,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:58,889 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:49:58,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:49:58,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1819023911, now seen corresponding path program 3 times [2023-08-30 11:49:58,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:49:58,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505428138] [2023-08-30 11:49:58,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:49:58,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:49:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:49:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:59,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:49:59,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505428138] [2023-08-30 11:49:59,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505428138] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:49:59,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463808469] [2023-08-30 11:49:59,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:49:59,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:49:59,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:49:59,299 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 11:49:59,300 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 11:49:59,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 11:49:59,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:49:59,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-30 11:49:59,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:49:59,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-30 11:49:59,495 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 11:49:59,516 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 11:49:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:49:59,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:50:00,251 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:00,251 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 118 treesize of output 82 [2023-08-30 11:50:00,290 INFO L321 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2023-08-30 11:50:00,290 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 246 treesize of output 246 [2023-08-30 11:50:00,331 INFO L321 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2023-08-30 11:50:00,332 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 214 treesize of output 198 [2023-08-30 11:50:00,377 INFO L321 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2023-08-30 11:50:00,377 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 141 treesize of output 149 [2023-08-30 11:50:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:02,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463808469] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:50:02,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:50:02,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-08-30 11:50:02,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423878897] [2023-08-30 11:50:02,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:50:02,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 11:50:02,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:02,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 11:50:02,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=611, Unknown=2, NotChecked=0, Total=756 [2023-08-30 11:50:02,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 11:50:02,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 154 transitions, 2185 flow. Second operand has 28 states, 28 states have (on average 90.28571428571429) internal successors, (2528), 28 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:02,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:02,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 11:50:02,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:04,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:50:07,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:50:08,198 INFO L130 PetriNetUnfolder]: 1569/2963 cut-off events. [2023-08-30 11:50:08,198 INFO L131 PetriNetUnfolder]: For 37450/37457 co-relation queries the response was YES. [2023-08-30 11:50:08,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21239 conditions, 2963 events. 1569/2963 cut-off events. For 37450/37457 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19097 event pairs, 731 based on Foata normal form. 7/2920 useless extension candidates. Maximal degree in co-relation 21185. Up to 2789 conditions per place. [2023-08-30 11:50:08,221 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 139 selfloop transitions, 35 changer transitions 9/184 dead transitions. [2023-08-30 11:50:08,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 184 transitions, 2687 flow [2023-08-30 11:50:08,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 11:50:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 11:50:08,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2123 transitions. [2023-08-30 11:50:08,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30768115942028984 [2023-08-30 11:50:08,224 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2123 transitions. [2023-08-30 11:50:08,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2123 transitions. [2023-08-30 11:50:08,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:08,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2123 transitions. [2023-08-30 11:50:08,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 92.30434782608695) internal successors, (2123), 23 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:08,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 300.0) internal successors, (7200), 24 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:08,232 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 300.0) internal successors, (7200), 24 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:08,232 INFO L175 Difference]: Start difference. First operand has 161 places, 154 transitions, 2185 flow. Second operand 23 states and 2123 transitions. [2023-08-30 11:50:08,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 184 transitions, 2687 flow [2023-08-30 11:50:08,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 184 transitions, 2311 flow, removed 111 selfloop flow, removed 12 redundant places. [2023-08-30 11:50:08,436 INFO L231 Difference]: Finished difference. Result has 165 places, 150 transitions, 1817 flow [2023-08-30 11:50:08,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1784, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1817, PETRI_PLACES=165, PETRI_TRANSITIONS=150} [2023-08-30 11:50:08,437 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 134 predicate places. [2023-08-30 11:50:08,437 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 150 transitions, 1817 flow [2023-08-30 11:50:08,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 90.28571428571429) internal successors, (2528), 28 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:08,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:08,438 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:08,445 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 11:50:08,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:08,643 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:50:08,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:08,643 INFO L85 PathProgramCache]: Analyzing trace with hash 648459223, now seen corresponding path program 4 times [2023-08-30 11:50:08,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:08,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406235268] [2023-08-30 11:50:08,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:08,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:09,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:09,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406235268] [2023-08-30 11:50:09,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406235268] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:09,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379560697] [2023-08-30 11:50:09,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:50:09,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:09,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:09,465 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 11:50:09,467 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 11:50:09,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:50:09,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:50:09,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 11:50:09,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:09,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:50:09,751 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 11:50:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:50:09,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:50:09,996 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:09,996 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 75 treesize of output 77 [2023-08-30 11:50:10,026 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:10,026 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 18 treesize of output 5 [2023-08-30 11:50:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:50:10,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379560697] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:50:10,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:50:10,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 26 [2023-08-30 11:50:10,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969557119] [2023-08-30 11:50:10,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:50:10,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 11:50:10,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:10,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 11:50:10,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=656, Unknown=4, NotChecked=0, Total=756 [2023-08-30 11:50:10,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 300 [2023-08-30 11:50:10,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 150 transitions, 1817 flow. Second operand has 28 states, 28 states have (on average 95.32142857142857) internal successors, (2669), 28 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:10,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:10,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 300 [2023-08-30 11:50:10,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:12,405 INFO L130 PetriNetUnfolder]: 1785/3333 cut-off events. [2023-08-30 11:50:12,405 INFO L131 PetriNetUnfolder]: For 25152/25158 co-relation queries the response was YES. [2023-08-30 11:50:12,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20016 conditions, 3333 events. 1785/3333 cut-off events. For 25152/25158 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22183 event pairs, 52 based on Foata normal form. 115/3400 useless extension candidates. Maximal degree in co-relation 19963. Up to 1221 conditions per place. [2023-08-30 11:50:12,430 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 128 selfloop transitions, 126 changer transitions 20/275 dead transitions. [2023-08-30 11:50:12,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 275 transitions, 3399 flow [2023-08-30 11:50:12,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 11:50:12,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 11:50:12,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2789 transitions. [2023-08-30 11:50:12,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3320238095238095 [2023-08-30 11:50:12,433 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2789 transitions. [2023-08-30 11:50:12,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2789 transitions. [2023-08-30 11:50:12,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:12,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2789 transitions. [2023-08-30 11:50:12,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 99.60714285714286) internal successors, (2789), 28 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:12,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 300.0) internal successors, (8700), 29 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:12,442 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 300.0) internal successors, (8700), 29 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:12,442 INFO L175 Difference]: Start difference. First operand has 165 places, 150 transitions, 1817 flow. Second operand 28 states and 2789 transitions. [2023-08-30 11:50:12,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 275 transitions, 3399 flow [2023-08-30 11:50:12,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 275 transitions, 3309 flow, removed 7 selfloop flow, removed 18 redundant places. [2023-08-30 11:50:12,528 INFO L231 Difference]: Finished difference. Result has 171 places, 164 transitions, 2206 flow [2023-08-30 11:50:12,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2206, PETRI_PLACES=171, PETRI_TRANSITIONS=164} [2023-08-30 11:50:12,529 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 140 predicate places. [2023-08-30 11:50:12,529 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 164 transitions, 2206 flow [2023-08-30 11:50:12,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 95.32142857142857) internal successors, (2669), 28 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:12,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:12,529 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:12,534 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 11:50:12,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:12,730 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:50:12,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:12,730 INFO L85 PathProgramCache]: Analyzing trace with hash -372113384, now seen corresponding path program 3 times [2023-08-30 11:50:12,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:12,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13712763] [2023-08-30 11:50:12,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:12,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:13,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:13,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13712763] [2023-08-30 11:50:13,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13712763] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:13,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314047939] [2023-08-30 11:50:13,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:50:13,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:13,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:13,189 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 11:50:13,212 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 11:50:13,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 11:50:13,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:50:13,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 11:50:13,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:50:13,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:50:13,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:13,438 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 11:50:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:50:13,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314047939] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:50:13,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:50:13,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 13 [2023-08-30 11:50:13,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230756903] [2023-08-30 11:50:13,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:50:13,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 11:50:13,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:13,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 11:50:13,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-08-30 11:50:13,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-08-30 11:50:13,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 164 transitions, 2206 flow. Second operand has 15 states, 15 states have (on average 114.73333333333333) internal successors, (1721), 15 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:13,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:13,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-08-30 11:50:13,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:14,699 INFO L130 PetriNetUnfolder]: 1681/3133 cut-off events. [2023-08-30 11:50:14,700 INFO L131 PetriNetUnfolder]: For 26793/26794 co-relation queries the response was YES. [2023-08-30 11:50:14,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20636 conditions, 3133 events. 1681/3133 cut-off events. For 26793/26794 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20314 event pairs, 556 based on Foata normal form. 32/3149 useless extension candidates. Maximal degree in co-relation 20584. Up to 2521 conditions per place. [2023-08-30 11:50:14,718 INFO L137 encePairwiseOnDemand]: 292/300 looper letters, 122 selfloop transitions, 108 changer transitions 1/232 dead transitions. [2023-08-30 11:50:14,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 232 transitions, 3331 flow [2023-08-30 11:50:14,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 11:50:14,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 11:50:14,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2005 transitions. [2023-08-30 11:50:14,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3931372549019608 [2023-08-30 11:50:14,724 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2005 transitions. [2023-08-30 11:50:14,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2005 transitions. [2023-08-30 11:50:14,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:14,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2005 transitions. [2023-08-30 11:50:14,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 117.94117647058823) internal successors, (2005), 17 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:14,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 300.0) internal successors, (5400), 18 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:14,730 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 300.0) internal successors, (5400), 18 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:14,730 INFO L175 Difference]: Start difference. First operand has 171 places, 164 transitions, 2206 flow. Second operand 17 states and 2005 transitions. [2023-08-30 11:50:14,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 232 transitions, 3331 flow [2023-08-30 11:50:14,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 232 transitions, 2788 flow, removed 153 selfloop flow, removed 19 redundant places. [2023-08-30 11:50:14,801 INFO L231 Difference]: Finished difference. Result has 161 places, 201 transitions, 2449 flow [2023-08-30 11:50:14,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1785, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2449, PETRI_PLACES=161, PETRI_TRANSITIONS=201} [2023-08-30 11:50:14,801 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 130 predicate places. [2023-08-30 11:50:14,801 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 201 transitions, 2449 flow [2023-08-30 11:50:14,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 114.73333333333333) internal successors, (1721), 15 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:14,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:14,802 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:14,807 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 11:50:15,002 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,SelfDestructingSolverStorable35 [2023-08-30 11:50:15,002 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:50:15,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:15,003 INFO L85 PathProgramCache]: Analyzing trace with hash -783218818, now seen corresponding path program 3 times [2023-08-30 11:50:15,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:15,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726090650] [2023-08-30 11:50:15,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:15,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:15,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:15,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:15,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726090650] [2023-08-30 11:50:15,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726090650] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:15,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119492720] [2023-08-30 11:50:15,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:50:15,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:15,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:15,477 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 11:50:15,500 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 11:50:15,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 11:50:15,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:50:15,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-30 11:50:15,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:15,664 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 11:50:15,706 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 11:50:15,743 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 11:50:15,775 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 11:50:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:15,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:50:17,227 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:17,227 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 191 treesize of output 116 [2023-08-30 11:50:17,254 INFO L321 Elim1Store]: treesize reduction 23, result has 48.9 percent of original size [2023-08-30 11:50:17,255 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 329 treesize of output 309 [2023-08-30 11:50:17,292 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-08-30 11:50:17,292 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 288 treesize of output 244 [2023-08-30 11:50:17,327 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-08-30 11:50:17,327 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 174 treesize of output 161 [2023-08-30 11:50:17,986 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2023-08-30 11:50:17,987 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 191 treesize of output 1 [2023-08-30 11:50:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:18,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119492720] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:50:18,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:50:18,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-08-30 11:50:18,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714428483] [2023-08-30 11:50:18,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:50:18,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 11:50:18,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:18,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 11:50:18,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=562, Unknown=6, NotChecked=0, Total=756 [2023-08-30 11:50:18,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 11:50:18,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 201 transitions, 2449 flow. Second operand has 28 states, 28 states have (on average 90.28571428571429) internal successors, (2528), 28 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:18,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:18,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 11:50:18,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:21,437 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 11:50:23,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:50:25,290 INFO L130 PetriNetUnfolder]: 1872/3402 cut-off events. [2023-08-30 11:50:25,290 INFO L131 PetriNetUnfolder]: For 20721/20722 co-relation queries the response was YES. [2023-08-30 11:50:25,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20539 conditions, 3402 events. 1872/3402 cut-off events. For 20721/20722 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 21962 event pairs, 559 based on Foata normal form. 6/3326 useless extension candidates. Maximal degree in co-relation 20493. Up to 3138 conditions per place. [2023-08-30 11:50:25,314 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 192 selfloop transitions, 99 changer transitions 6/298 dead transitions. [2023-08-30 11:50:25,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 298 transitions, 4057 flow [2023-08-30 11:50:25,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 11:50:25,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 11:50:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2403 transitions. [2023-08-30 11:50:25,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3080769230769231 [2023-08-30 11:50:25,316 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2403 transitions. [2023-08-30 11:50:25,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2403 transitions. [2023-08-30 11:50:25,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:25,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2403 transitions. [2023-08-30 11:50:25,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 92.42307692307692) internal successors, (2403), 26 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:25,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 300.0) internal successors, (8100), 27 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:25,322 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 300.0) internal successors, (8100), 27 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:25,323 INFO L175 Difference]: Start difference. First operand has 161 places, 201 transitions, 2449 flow. Second operand 26 states and 2403 transitions. [2023-08-30 11:50:25,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 298 transitions, 4057 flow [2023-08-30 11:50:25,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 298 transitions, 3740 flow, removed 56 selfloop flow, removed 12 redundant places. [2023-08-30 11:50:25,382 INFO L231 Difference]: Finished difference. Result has 178 places, 271 transitions, 3402 flow [2023-08-30 11:50:25,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=2178, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3402, PETRI_PLACES=178, PETRI_TRANSITIONS=271} [2023-08-30 11:50:25,382 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 147 predicate places. [2023-08-30 11:50:25,383 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 271 transitions, 3402 flow [2023-08-30 11:50:25,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 90.28571428571429) internal successors, (2528), 28 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:25,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:25,383 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:25,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-08-30 11:50:25,587 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,SelfDestructingSolverStorable36 [2023-08-30 11:50:25,588 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:50:25,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:25,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1944489745, now seen corresponding path program 5 times [2023-08-30 11:50:25,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:25,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370707345] [2023-08-30 11:50:25,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:25,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:26,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:26,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370707345] [2023-08-30 11:50:26,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370707345] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:26,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581168998] [2023-08-30 11:50:26,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:50:26,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:26,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:26,237 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 11:50:26,240 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 11:50:26,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 11:50:26,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:50:26,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 11:50:26,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:50:26,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:50:26,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:26,610 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 11:50:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:50:26,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581168998] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:50:26,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:50:26,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 20 [2023-08-30 11:50:26,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454525488] [2023-08-30 11:50:26,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:50:26,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 11:50:26,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:26,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 11:50:26,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-08-30 11:50:27,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-08-30 11:50:27,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 271 transitions, 3402 flow. Second operand has 22 states, 22 states have (on average 114.45454545454545) internal successors, (2518), 22 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:27,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:27,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-08-30 11:50:27,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:28,684 INFO L130 PetriNetUnfolder]: 1993/3622 cut-off events. [2023-08-30 11:50:28,684 INFO L131 PetriNetUnfolder]: For 27020/27021 co-relation queries the response was YES. [2023-08-30 11:50:28,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22496 conditions, 3622 events. 1993/3622 cut-off events. For 27020/27021 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 23570 event pairs, 488 based on Foata normal form. 78/3630 useless extension candidates. Maximal degree in co-relation 22447. Up to 2753 conditions per place. [2023-08-30 11:50:28,709 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 249 selfloop transitions, 154 changer transitions 0/404 dead transitions. [2023-08-30 11:50:28,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 404 transitions, 5553 flow [2023-08-30 11:50:28,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 11:50:28,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 11:50:28,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3191 transitions. [2023-08-30 11:50:28,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39395061728395064 [2023-08-30 11:50:28,720 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3191 transitions. [2023-08-30 11:50:28,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3191 transitions. [2023-08-30 11:50:28,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:28,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3191 transitions. [2023-08-30 11:50:28,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 118.18518518518519) internal successors, (3191), 27 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:28,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 300.0) internal successors, (8400), 28 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:28,727 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 300.0) internal successors, (8400), 28 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:28,727 INFO L175 Difference]: Start difference. First operand has 178 places, 271 transitions, 3402 flow. Second operand 27 states and 3191 transitions. [2023-08-30 11:50:28,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 404 transitions, 5553 flow [2023-08-30 11:50:28,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 404 transitions, 5062 flow, removed 226 selfloop flow, removed 13 redundant places. [2023-08-30 11:50:28,823 INFO L231 Difference]: Finished difference. Result has 197 places, 331 transitions, 4426 flow [2023-08-30 11:50:28,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=3040, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4426, PETRI_PLACES=197, PETRI_TRANSITIONS=331} [2023-08-30 11:50:28,823 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 166 predicate places. [2023-08-30 11:50:28,823 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 331 transitions, 4426 flow [2023-08-30 11:50:28,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 114.45454545454545) internal successors, (2518), 22 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:28,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:28,824 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:28,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-08-30 11:50:29,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 11:50:29,024 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:50:29,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:29,025 INFO L85 PathProgramCache]: Analyzing trace with hash -783200165, now seen corresponding path program 6 times [2023-08-30 11:50:29,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:29,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147036361] [2023-08-30 11:50:29,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:29,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:29,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:29,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147036361] [2023-08-30 11:50:29,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147036361] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:29,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870312140] [2023-08-30 11:50:29,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:50:29,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:29,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:29,491 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 11:50:29,494 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 11:50:29,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 11:50:29,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:50:29,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-30 11:50:29,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:29,715 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 11:50:29,747 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 11:50:29,779 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 11:50:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:29,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:50:30,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:30,447 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 119 treesize of output 83 [2023-08-30 11:50:30,479 INFO L321 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-08-30 11:50:30,479 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 530 treesize of output 492 [2023-08-30 11:50:30,495 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 11:50:30,496 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 11:50:30,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:30,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 167 treesize of output 170 [2023-08-30 11:50:30,545 INFO L321 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-08-30 11:50:30,545 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 167 treesize of output 145 [2023-08-30 11:50:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:31,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870312140] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:50:31,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:50:31,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-08-30 11:50:31,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702188221] [2023-08-30 11:50:31,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:50:31,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 11:50:31,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:31,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 11:50:31,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=575, Unknown=3, NotChecked=0, Total=756 [2023-08-30 11:50:32,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 11:50:32,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 331 transitions, 4426 flow. Second operand has 28 states, 28 states have (on average 90.28571428571429) internal successors, (2528), 28 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:32,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:32,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 11:50:32,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:34,687 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 11:50:35,717 INFO L130 PetriNetUnfolder]: 1992/3619 cut-off events. [2023-08-30 11:50:35,717 INFO L131 PetriNetUnfolder]: For 29848/29849 co-relation queries the response was YES. [2023-08-30 11:50:35,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23649 conditions, 3619 events. 1992/3619 cut-off events. For 29848/29849 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 23566 event pairs, 813 based on Foata normal form. 2/3555 useless extension candidates. Maximal degree in co-relation 23591. Up to 3524 conditions per place. [2023-08-30 11:50:35,741 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 318 selfloop transitions, 14 changer transitions 11/344 dead transitions. [2023-08-30 11:50:35,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 344 transitions, 5138 flow [2023-08-30 11:50:35,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 11:50:35,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 11:50:35,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1478 transitions. [2023-08-30 11:50:35,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30791666666666667 [2023-08-30 11:50:35,743 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1478 transitions. [2023-08-30 11:50:35,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1478 transitions. [2023-08-30 11:50:35,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:35,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1478 transitions. [2023-08-30 11:50:35,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 92.375) internal successors, (1478), 16 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:35,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 300.0) internal successors, (5100), 17 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:35,747 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 300.0) internal successors, (5100), 17 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:35,747 INFO L175 Difference]: Start difference. First operand has 197 places, 331 transitions, 4426 flow. Second operand 16 states and 1478 transitions. [2023-08-30 11:50:35,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 344 transitions, 5138 flow [2023-08-30 11:50:35,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 344 transitions, 4868 flow, removed 119 selfloop flow, removed 11 redundant places. [2023-08-30 11:50:35,869 INFO L231 Difference]: Finished difference. Result has 200 places, 325 transitions, 4112 flow [2023-08-30 11:50:35,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=4146, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4112, PETRI_PLACES=200, PETRI_TRANSITIONS=325} [2023-08-30 11:50:35,869 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 169 predicate places. [2023-08-30 11:50:35,869 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 325 transitions, 4112 flow [2023-08-30 11:50:35,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 90.28571428571429) internal successors, (2528), 28 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:35,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:35,870 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:35,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-08-30 11:50:36,076 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,SelfDestructingSolverStorable38 [2023-08-30 11:50:36,076 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:50:36,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:36,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1440382828, now seen corresponding path program 4 times [2023-08-30 11:50:36,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:36,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379993635] [2023-08-30 11:50:36,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:36,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:36,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:36,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379993635] [2023-08-30 11:50:36,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379993635] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:36,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033669697] [2023-08-30 11:50:36,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:50:36,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:36,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:36,608 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 11:50:36,610 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 11:50:36,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:50:36,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:50:36,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-30 11:50:36,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:36,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:50:36,909 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 11:50:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:37,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:50:37,046 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1276 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1276) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 1))) is different from false [2023-08-30 11:50:37,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:37,056 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 41 [2023-08-30 11:50:37,064 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 5 [2023-08-30 11:50:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:37,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033669697] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:50:37,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:50:37,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2023-08-30 11:50:37,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076398014] [2023-08-30 11:50:37,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:50:37,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 11:50:37,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:37,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 11:50:37,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=558, Unknown=1, NotChecked=48, Total=702 [2023-08-30 11:50:37,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 300 [2023-08-30 11:50:37,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 325 transitions, 4112 flow. Second operand has 27 states, 27 states have (on average 93.33333333333333) internal successors, (2520), 27 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:37,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:37,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 300 [2023-08-30 11:50:37,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:38,740 INFO L130 PetriNetUnfolder]: 1983/3595 cut-off events. [2023-08-30 11:50:38,740 INFO L131 PetriNetUnfolder]: For 25590/25590 co-relation queries the response was YES. [2023-08-30 11:50:38,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22397 conditions, 3595 events. 1983/3595 cut-off events. For 25590/25590 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 23209 event pairs, 824 based on Foata normal form. 6/3535 useless extension candidates. Maximal degree in co-relation 22339. Up to 3525 conditions per place. [2023-08-30 11:50:38,763 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 314 selfloop transitions, 13 changer transitions 11/339 dead transitions. [2023-08-30 11:50:38,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 339 transitions, 4812 flow [2023-08-30 11:50:38,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 11:50:38,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 11:50:38,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1343 transitions. [2023-08-30 11:50:38,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31976190476190475 [2023-08-30 11:50:38,765 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1343 transitions. [2023-08-30 11:50:38,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1343 transitions. [2023-08-30 11:50:38,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:38,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1343 transitions. [2023-08-30 11:50:38,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 95.92857142857143) internal successors, (1343), 14 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:38,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 300.0) internal successors, (4500), 15 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:38,768 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 300.0) internal successors, (4500), 15 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:38,768 INFO L175 Difference]: Start difference. First operand has 200 places, 325 transitions, 4112 flow. Second operand 14 states and 1343 transitions. [2023-08-30 11:50:38,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 339 transitions, 4812 flow [2023-08-30 11:50:38,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 339 transitions, 4737 flow, removed 18 selfloop flow, removed 13 redundant places. [2023-08-30 11:50:38,857 INFO L231 Difference]: Finished difference. Result has 191 places, 319 transitions, 3982 flow [2023-08-30 11:50:38,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=4020, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3982, PETRI_PLACES=191, PETRI_TRANSITIONS=319} [2023-08-30 11:50:38,857 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 160 predicate places. [2023-08-30 11:50:38,857 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 319 transitions, 3982 flow [2023-08-30 11:50:38,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 93.33333333333333) internal successors, (2520), 27 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:38,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:38,858 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:38,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-08-30 11:50:39,058 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,SelfDestructingSolverStorable39 [2023-08-30 11:50:39,059 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:50:39,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:39,059 INFO L85 PathProgramCache]: Analyzing trace with hash 419811111, now seen corresponding path program 7 times [2023-08-30 11:50:39,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:39,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198012348] [2023-08-30 11:50:39,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:39,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:39,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:39,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:39,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198012348] [2023-08-30 11:50:39,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198012348] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:39,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083187292] [2023-08-30 11:50:39,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:50:39,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:39,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:39,742 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 11:50:39,745 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 11:50:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:39,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 11:50:39,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:39,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:50:39,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-30 11:50:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:50:40,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:50:40,154 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1311 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1311) c_~q~0.base))) (or (< (let ((.cse1 (* c_~q_front~0 4))) (+ (select .cse0 (+ .cse1 c_~q~0.offset 4)) (select .cse0 (+ .cse1 c_~q~0.offset)))) 2147483648) (not (= (select .cse0 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1))))) is different from false [2023-08-30 11:50:40,174 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:40,175 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 96 treesize of output 98 [2023-08-30 11:50:40,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:40,187 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 48 treesize of output 46 [2023-08-30 11:50:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:50:40,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083187292] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:50:40,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:50:40,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 24 [2023-08-30 11:50:40,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005306971] [2023-08-30 11:50:40,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:50:40,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 11:50:40,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:40,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 11:50:40,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=530, Unknown=1, NotChecked=46, Total=650 [2023-08-30 11:50:40,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 300 [2023-08-30 11:50:40,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 319 transitions, 3982 flow. Second operand has 26 states, 26 states have (on average 93.34615384615384) internal successors, (2427), 26 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:40,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:40,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 300 [2023-08-30 11:50:40,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:42,238 INFO L130 PetriNetUnfolder]: 2383/4281 cut-off events. [2023-08-30 11:50:42,238 INFO L131 PetriNetUnfolder]: For 30664/30664 co-relation queries the response was YES. [2023-08-30 11:50:42,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26476 conditions, 4281 events. 2383/4281 cut-off events. For 30664/30664 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 28393 event pairs, 204 based on Foata normal form. 80/4295 useless extension candidates. Maximal degree in co-relation 26418. Up to 2331 conditions per place. [2023-08-30 11:50:42,268 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 159 selfloop transitions, 370 changer transitions 12/542 dead transitions. [2023-08-30 11:50:42,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 542 transitions, 7448 flow [2023-08-30 11:50:42,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 11:50:42,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 11:50:42,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3089 transitions. [2023-08-30 11:50:42,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32177083333333334 [2023-08-30 11:50:42,272 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3089 transitions. [2023-08-30 11:50:42,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3089 transitions. [2023-08-30 11:50:42,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:42,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3089 transitions. [2023-08-30 11:50:42,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 96.53125) internal successors, (3089), 32 states have internal predecessors, (3089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:42,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 300.0) internal successors, (9900), 33 states have internal predecessors, (9900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:42,283 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 300.0) internal successors, (9900), 33 states have internal predecessors, (9900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:42,283 INFO L175 Difference]: Start difference. First operand has 191 places, 319 transitions, 3982 flow. Second operand 32 states and 3089 transitions. [2023-08-30 11:50:42,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 542 transitions, 7448 flow [2023-08-30 11:50:42,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 542 transitions, 7365 flow, removed 25 selfloop flow, removed 13 redundant places. [2023-08-30 11:50:42,419 INFO L231 Difference]: Finished difference. Result has 210 places, 468 transitions, 6905 flow [2023-08-30 11:50:42,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=3898, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=6905, PETRI_PLACES=210, PETRI_TRANSITIONS=468} [2023-08-30 11:50:42,420 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 179 predicate places. [2023-08-30 11:50:42,420 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 468 transitions, 6905 flow [2023-08-30 11:50:42,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 93.34615384615384) internal successors, (2427), 26 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:42,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:42,420 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:42,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-08-30 11:50:42,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:42,621 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:50:42,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:42,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1575143313, now seen corresponding path program 3 times [2023-08-30 11:50:42,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:42,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188947121] [2023-08-30 11:50:42,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:42,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:43,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:43,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:43,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188947121] [2023-08-30 11:50:43,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188947121] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:43,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437880626] [2023-08-30 11:50:43,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:50:43,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:43,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:43,278 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:50:43,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-30 11:50:43,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 11:50:43,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:50:43,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 11:50:43,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:50:43,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:50:43,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:43,567 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 11:50:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:50:43,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437880626] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:50:43,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:50:43,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2023-08-30 11:50:43,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343353183] [2023-08-30 11:50:43,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:50:43,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 11:50:43,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:43,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 11:50:43,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-08-30 11:50:44,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-08-30 11:50:44,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 468 transitions, 6905 flow. Second operand has 16 states, 16 states have (on average 114.625) internal successors, (1834), 16 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:44,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:44,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-08-30 11:50:44,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:45,124 INFO L130 PetriNetUnfolder]: 1989/3578 cut-off events. [2023-08-30 11:50:45,124 INFO L131 PetriNetUnfolder]: For 36217/36217 co-relation queries the response was YES. [2023-08-30 11:50:45,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25633 conditions, 3578 events. 1989/3578 cut-off events. For 36217/36217 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 22988 event pairs, 243 based on Foata normal form. 294/3798 useless extension candidates. Maximal degree in co-relation 25568. Up to 2724 conditions per place. [2023-08-30 11:50:45,199 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 208 selfloop transitions, 194 changer transitions 22/425 dead transitions. [2023-08-30 11:50:45,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 425 transitions, 6818 flow [2023-08-30 11:50:45,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 11:50:45,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 11:50:45,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2116 transitions. [2023-08-30 11:50:45,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39185185185185184 [2023-08-30 11:50:45,202 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2116 transitions. [2023-08-30 11:50:45,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2116 transitions. [2023-08-30 11:50:45,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:45,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2116 transitions. [2023-08-30 11:50:45,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 117.55555555555556) internal successors, (2116), 18 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:45,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 300.0) internal successors, (5700), 19 states have internal predecessors, (5700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:45,208 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 300.0) internal successors, (5700), 19 states have internal predecessors, (5700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:45,208 INFO L175 Difference]: Start difference. First operand has 210 places, 468 transitions, 6905 flow. Second operand 18 states and 2116 transitions. [2023-08-30 11:50:45,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 425 transitions, 6818 flow [2023-08-30 11:50:45,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 425 transitions, 6133 flow, removed 192 selfloop flow, removed 21 redundant places. [2023-08-30 11:50:45,367 INFO L231 Difference]: Finished difference. Result has 197 places, 377 transitions, 5312 flow [2023-08-30 11:50:45,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=5008, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5312, PETRI_PLACES=197, PETRI_TRANSITIONS=377} [2023-08-30 11:50:45,368 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 166 predicate places. [2023-08-30 11:50:45,368 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 377 transitions, 5312 flow [2023-08-30 11:50:45,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 114.625) internal successors, (1834), 16 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:45,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:45,368 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:45,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-08-30 11:50:45,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:45,569 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:50:45,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:45,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1884055328, now seen corresponding path program 5 times [2023-08-30 11:50:45,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:45,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860219021] [2023-08-30 11:50:45,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:45,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:50:45,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:45,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860219021] [2023-08-30 11:50:45,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860219021] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:45,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862165447] [2023-08-30 11:50:45,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:50:45,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:45,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:45,635 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:50:45,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-30 11:50:45,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 11:50:45,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:50:45,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 11:50:45,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:50:45,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:50:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:50:45,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862165447] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:50:45,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:50:45,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 5] total 9 [2023-08-30 11:50:45,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671809621] [2023-08-30 11:50:45,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:50:45,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 11:50:45,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:45,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 11:50:45,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-08-30 11:50:45,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 300 [2023-08-30 11:50:45,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 377 transitions, 5312 flow. Second operand has 11 states, 11 states have (on average 128.36363636363637) internal successors, (1412), 11 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:45,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:45,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 300 [2023-08-30 11:50:45,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:46,559 INFO L130 PetriNetUnfolder]: 2396/4307 cut-off events. [2023-08-30 11:50:46,559 INFO L131 PetriNetUnfolder]: For 36959/36959 co-relation queries the response was YES. [2023-08-30 11:50:46,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29644 conditions, 4307 events. 2396/4307 cut-off events. For 36959/36959 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 28792 event pairs, 216 based on Foata normal form. 92/4307 useless extension candidates. Maximal degree in co-relation 29586. Up to 2500 conditions per place. [2023-08-30 11:50:46,592 INFO L137 encePairwiseOnDemand]: 294/300 looper letters, 217 selfloop transitions, 284 changer transitions 8/510 dead transitions. [2023-08-30 11:50:46,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 510 transitions, 8215 flow [2023-08-30 11:50:46,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 11:50:46,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 11:50:46,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 678 transitions. [2023-08-30 11:50:46,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452 [2023-08-30 11:50:46,594 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 678 transitions. [2023-08-30 11:50:46,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 678 transitions. [2023-08-30 11:50:46,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:46,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 678 transitions. [2023-08-30 11:50:46,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:46,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:46,596 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 300.0) internal successors, (1800), 6 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:46,596 INFO L175 Difference]: Start difference. First operand has 197 places, 377 transitions, 5312 flow. Second operand 5 states and 678 transitions. [2023-08-30 11:50:46,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 510 transitions, 8215 flow [2023-08-30 11:50:46,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 510 transitions, 8052 flow, removed 19 selfloop flow, removed 10 redundant places. [2023-08-30 11:50:46,730 INFO L231 Difference]: Finished difference. Result has 189 places, 481 transitions, 8069 flow [2023-08-30 11:50:46,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=5157, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=8069, PETRI_PLACES=189, PETRI_TRANSITIONS=481} [2023-08-30 11:50:46,731 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 158 predicate places. [2023-08-30 11:50:46,731 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 481 transitions, 8069 flow [2023-08-30 11:50:46,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 128.36363636363637) internal successors, (1412), 11 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:46,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:46,732 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:46,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-08-30 11:50:46,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:46,937 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:50:46,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:46,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1575149770, now seen corresponding path program 4 times [2023-08-30 11:50:46,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:46,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542384638] [2023-08-30 11:50:46,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:46,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:47,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:47,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542384638] [2023-08-30 11:50:47,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542384638] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:47,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94180973] [2023-08-30 11:50:47,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:50:47,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:47,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:47,333 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:50:47,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-30 11:50:47,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:50:47,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:50:47,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 11:50:47,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:50:47,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:50:47,570 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 11:50:47,570 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 25 treesize of output 13 [2023-08-30 11:50:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:50:47,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94180973] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:50:47,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:50:47,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 16 [2023-08-30 11:50:47,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94219690] [2023-08-30 11:50:47,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:50:47,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 11:50:47,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:47,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 11:50:47,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-08-30 11:50:48,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-08-30 11:50:48,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 481 transitions, 8069 flow. Second operand has 18 states, 18 states have (on average 114.66666666666667) internal successors, (2064), 18 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:48,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:48,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-08-30 11:50:48,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:49,086 INFO L130 PetriNetUnfolder]: 2345/4210 cut-off events. [2023-08-30 11:50:49,086 INFO L131 PetriNetUnfolder]: For 45040/45042 co-relation queries the response was YES. [2023-08-30 11:50:49,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32448 conditions, 4210 events. 2345/4210 cut-off events. For 45040/45042 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 27823 event pairs, 374 based on Foata normal form. 48/4166 useless extension candidates. Maximal degree in co-relation 32387. Up to 3715 conditions per place. [2023-08-30 11:50:49,174 INFO L137 encePairwiseOnDemand]: 292/300 looper letters, 344 selfloop transitions, 120 changer transitions 36/501 dead transitions. [2023-08-30 11:50:49,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 501 transitions, 9075 flow [2023-08-30 11:50:49,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 11:50:49,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 11:50:49,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1651 transitions. [2023-08-30 11:50:49,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930952380952381 [2023-08-30 11:50:49,176 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1651 transitions. [2023-08-30 11:50:49,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1651 transitions. [2023-08-30 11:50:49,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:49,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1651 transitions. [2023-08-30 11:50:49,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 117.92857142857143) internal successors, (1651), 14 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:49,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 300.0) internal successors, (4500), 15 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:49,180 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 300.0) internal successors, (4500), 15 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:49,180 INFO L175 Difference]: Start difference. First operand has 189 places, 481 transitions, 8069 flow. Second operand 14 states and 1651 transitions. [2023-08-30 11:50:49,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 501 transitions, 9075 flow [2023-08-30 11:50:49,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 501 transitions, 8538 flow, removed 266 selfloop flow, removed 4 redundant places. [2023-08-30 11:50:49,458 INFO L231 Difference]: Finished difference. Result has 188 places, 451 transitions, 7183 flow [2023-08-30 11:50:49,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=7474, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7183, PETRI_PLACES=188, PETRI_TRANSITIONS=451} [2023-08-30 11:50:49,459 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 157 predicate places. [2023-08-30 11:50:49,459 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 451 transitions, 7183 flow [2023-08-30 11:50:49,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 114.66666666666667) internal successors, (2064), 18 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:49,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:49,459 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:49,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-30 11:50:49,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-30 11:50:49,660 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:50:49,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:49,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1944471145, now seen corresponding path program 8 times [2023-08-30 11:50:49,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:49,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065225108] [2023-08-30 11:50:49,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:49,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:50,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:50,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065225108] [2023-08-30 11:50:50,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065225108] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:50,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341567008] [2023-08-30 11:50:50,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:50:50,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:50,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:50,323 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:50:50,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-30 11:50:50,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:50:50,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:50:50,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 11:50:50,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:50:50,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:50:50,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:50,649 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 11:50:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:50:50,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341567008] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:50:50,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:50:50,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 20 [2023-08-30 11:50:50,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559162496] [2023-08-30 11:50:50,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:50:50,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 11:50:50,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:50,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 11:50:50,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2023-08-30 11:50:51,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-08-30 11:50:51,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 451 transitions, 7183 flow. Second operand has 22 states, 22 states have (on average 114.45454545454545) internal successors, (2518), 22 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:51,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:51,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-08-30 11:50:51,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:52,778 INFO L130 PetriNetUnfolder]: 2243/3994 cut-off events. [2023-08-30 11:50:52,778 INFO L131 PetriNetUnfolder]: For 34669/34671 co-relation queries the response was YES. [2023-08-30 11:50:52,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27245 conditions, 3994 events. 2243/3994 cut-off events. For 34669/34671 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 25932 event pairs, 457 based on Foata normal form. 92/3998 useless extension candidates. Maximal degree in co-relation 27186. Up to 2834 conditions per place. [2023-08-30 11:50:52,808 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 413 selfloop transitions, 145 changer transitions 1/560 dead transitions. [2023-08-30 11:50:52,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 560 transitions, 9341 flow [2023-08-30 11:50:52,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 11:50:52,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 11:50:52,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2594 transitions. [2023-08-30 11:50:52,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.393030303030303 [2023-08-30 11:50:52,860 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2594 transitions. [2023-08-30 11:50:52,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2594 transitions. [2023-08-30 11:50:52,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:52,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2594 transitions. [2023-08-30 11:50:52,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 117.9090909090909) internal successors, (2594), 22 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:52,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 300.0) internal successors, (6900), 23 states have internal predecessors, (6900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:52,867 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 300.0) internal successors, (6900), 23 states have internal predecessors, (6900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:52,867 INFO L175 Difference]: Start difference. First operand has 188 places, 451 transitions, 7183 flow. Second operand 22 states and 2594 transitions. [2023-08-30 11:50:52,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 560 transitions, 9341 flow [2023-08-30 11:50:52,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 560 transitions, 9005 flow, removed 48 selfloop flow, removed 12 redundant places. [2023-08-30 11:50:53,000 INFO L231 Difference]: Finished difference. Result has 195 places, 450 transitions, 7322 flow [2023-08-30 11:50:53,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=6602, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7322, PETRI_PLACES=195, PETRI_TRANSITIONS=450} [2023-08-30 11:50:53,001 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 164 predicate places. [2023-08-30 11:50:53,001 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 450 transitions, 7322 flow [2023-08-30 11:50:53,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 114.45454545454545) internal successors, (2518), 22 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:53,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:53,002 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:53,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-30 11:50:53,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-30 11:50:53,207 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:50:53,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:53,207 INFO L85 PathProgramCache]: Analyzing trace with hash -124527907, now seen corresponding path program 4 times [2023-08-30 11:50:53,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:53,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501766908] [2023-08-30 11:50:53,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:53,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:50:54,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:50:54,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:50:54,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501766908] [2023-08-30 11:50:54,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501766908] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:50:54,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630378007] [2023-08-30 11:50:54,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:50:54,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:50:54,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:50:54,139 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:50:54,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-30 11:50:54,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:50:54,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:50:54,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 11:50:54,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:50:54,264 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 98 treesize of output 94 [2023-08-30 11:50:54,377 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 11:50:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 11:50:54,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:50:54,612 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* c_~q_front~0 4))) (let ((.cse3 (+ .cse6 c_~q~0.offset)) (.cse2 (+ .cse6 c_~q~0.offset 4))) (and (forall ((v_ArrVal_1504 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1504) c_~q~0.base))) (let ((.cse0 (select .cse1 .cse3))) (or (< 0 (+ .cse0 1)) (< 0 (+ 2147483649 (select .cse1 .cse2) .cse0)))))) (forall ((v_ArrVal_1504 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1504) c_~q~0.base))) (let ((.cse4 (select .cse5 .cse2))) (or (< 0 (+ .cse4 2147483650)) (< 0 (+ 2147483649 .cse4 (select .cse5 .cse3)))))))))) is different from false [2023-08-30 11:50:54,693 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:54,693 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 199 treesize of output 167 [2023-08-30 11:50:54,704 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:54,705 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 122 treesize of output 103 [2023-08-30 11:50:54,712 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:50:54,712 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 83 [2023-08-30 11:50:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 11:50:54,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630378007] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:50:54,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:50:54,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 23 [2023-08-30 11:50:54,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754237402] [2023-08-30 11:50:54,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:50:54,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 11:50:54,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:50:54,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 11:50:54,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=480, Unknown=1, NotChecked=44, Total=600 [2023-08-30 11:50:54,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 11:50:54,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 450 transitions, 7322 flow. Second operand has 25 states, 25 states have (on average 90.32) internal successors, (2258), 25 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:54,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:50:54,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 11:50:54,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:50:59,426 INFO L130 PetriNetUnfolder]: 2330/4201 cut-off events. [2023-08-30 11:50:59,426 INFO L131 PetriNetUnfolder]: For 38796/38798 co-relation queries the response was YES. [2023-08-30 11:50:59,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29029 conditions, 4201 events. 2330/4201 cut-off events. For 38796/38798 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 27831 event pairs, 139 based on Foata normal form. 36/4149 useless extension candidates. Maximal degree in co-relation 28968. Up to 2104 conditions per place. [2023-08-30 11:50:59,454 INFO L137 encePairwiseOnDemand]: 287/300 looper letters, 294 selfloop transitions, 349 changer transitions 22/666 dead transitions. [2023-08-30 11:50:59,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 666 transitions, 10783 flow [2023-08-30 11:50:59,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 11:50:59,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 11:50:59,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3205 transitions. [2023-08-30 11:50:59,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3142156862745098 [2023-08-30 11:50:59,458 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3205 transitions. [2023-08-30 11:50:59,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3205 transitions. [2023-08-30 11:50:59,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:50:59,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3205 transitions. [2023-08-30 11:50:59,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 94.26470588235294) internal successors, (3205), 34 states have internal predecessors, (3205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:59,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 300.0) internal successors, (10500), 35 states have internal predecessors, (10500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:59,468 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 300.0) internal successors, (10500), 35 states have internal predecessors, (10500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:59,468 INFO L175 Difference]: Start difference. First operand has 195 places, 450 transitions, 7322 flow. Second operand 34 states and 3205 transitions. [2023-08-30 11:50:59,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 666 transitions, 10783 flow [2023-08-30 11:50:59,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 666 transitions, 10688 flow, removed 25 selfloop flow, removed 11 redundant places. [2023-08-30 11:50:59,632 INFO L231 Difference]: Finished difference. Result has 225 places, 517 transitions, 9190 flow [2023-08-30 11:50:59,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=7185, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9190, PETRI_PLACES=225, PETRI_TRANSITIONS=517} [2023-08-30 11:50:59,633 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 194 predicate places. [2023-08-30 11:50:59,633 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 517 transitions, 9190 flow [2023-08-30 11:50:59,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 90.32) internal successors, (2258), 25 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:50:59,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:50:59,634 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:50:59,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-08-30 11:50:59,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-30 11:50:59,835 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:50:59,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:50:59,835 INFO L85 PathProgramCache]: Analyzing trace with hash 848076431, now seen corresponding path program 9 times [2023-08-30 11:50:59,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:50:59,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958197590] [2023-08-30 11:50:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:50:59,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:50:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:51:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:00,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:51:00,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958197590] [2023-08-30 11:51:00,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958197590] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:51:00,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004468168] [2023-08-30 11:51:00,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:51:00,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:51:00,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:51:00,853 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:51:00,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-30 11:51:01,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 11:51:01,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:51:01,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 11:51:01,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:51:01,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:51:01,085 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 11:51:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:51:01,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:51:01,358 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:51:01,359 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 96 treesize of output 98 [2023-08-30 11:51:01,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:51:01,371 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 48 treesize of output 46 [2023-08-30 11:51:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:51:01,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004468168] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:51:01,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:51:01,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 25 [2023-08-30 11:51:01,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745347438] [2023-08-30 11:51:01,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:51:01,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 11:51:01,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:51:01,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 11:51:01,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=618, Unknown=4, NotChecked=0, Total=702 [2023-08-30 11:51:02,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 300 [2023-08-30 11:51:02,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 517 transitions, 9190 flow. Second operand has 27 states, 27 states have (on average 93.33333333333333) internal successors, (2520), 27 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:02,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:51:02,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 300 [2023-08-30 11:51:02,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:51:05,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:51:07,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:51:10,002 WARN L539 Checker$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 11:51:10,798 INFO L130 PetriNetUnfolder]: 2719/4852 cut-off events. [2023-08-30 11:51:10,798 INFO L131 PetriNetUnfolder]: For 59973/59975 co-relation queries the response was YES. [2023-08-30 11:51:10,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39057 conditions, 4852 events. 2719/4852 cut-off events. For 59973/59975 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 32693 event pairs, 186 based on Foata normal form. 44/4808 useless extension candidates. Maximal degree in co-relation 38987. Up to 3152 conditions per place. [2023-08-30 11:51:10,842 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 329 selfloop transitions, 369 changer transitions 1/700 dead transitions. [2023-08-30 11:51:10,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 700 transitions, 13058 flow [2023-08-30 11:51:10,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 11:51:10,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 11:51:10,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2714 transitions. [2023-08-30 11:51:10,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3230952380952381 [2023-08-30 11:51:10,844 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2714 transitions. [2023-08-30 11:51:10,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2714 transitions. [2023-08-30 11:51:10,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:51:10,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2714 transitions. [2023-08-30 11:51:10,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 96.92857142857143) internal successors, (2714), 28 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:10,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 300.0) internal successors, (8700), 29 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:10,851 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 300.0) internal successors, (8700), 29 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:10,851 INFO L175 Difference]: Start difference. First operand has 225 places, 517 transitions, 9190 flow. Second operand 28 states and 2714 transitions. [2023-08-30 11:51:10,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 700 transitions, 13058 flow [2023-08-30 11:51:11,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 700 transitions, 12651 flow, removed 37 selfloop flow, removed 17 redundant places. [2023-08-30 11:51:11,125 INFO L231 Difference]: Finished difference. Result has 234 places, 597 transitions, 11129 flow [2023-08-30 11:51:11,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=8717, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=11129, PETRI_PLACES=234, PETRI_TRANSITIONS=597} [2023-08-30 11:51:11,126 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 203 predicate places. [2023-08-30 11:51:11,126 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 597 transitions, 11129 flow [2023-08-30 11:51:11,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 93.33333333333333) internal successors, (2520), 27 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:11,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:51:11,126 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:51:11,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-08-30 11:51:11,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-30 11:51:11,327 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:51:11,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:51:11,327 INFO L85 PathProgramCache]: Analyzing trace with hash 2092962630, now seen corresponding path program 6 times [2023-08-30 11:51:11,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:51:11,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605764930] [2023-08-30 11:51:11,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:51:11,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:51:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:51:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:12,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:51:12,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605764930] [2023-08-30 11:51:12,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605764930] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:51:12,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578623420] [2023-08-30 11:51:12,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:51:12,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:51:12,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:51:12,134 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:51:12,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-30 11:51:12,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 11:51:12,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:51:12,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 11:51:12,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:51:12,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:51:12,421 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 11:51:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:51:12,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:51:12,524 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1590 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1590) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 1))) is different from false [2023-08-30 11:51:12,533 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:51:12,533 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 41 [2023-08-30 11:51:12,540 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 5 [2023-08-30 11:51:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:51:12,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578623420] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:51:12,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:51:12,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 27 [2023-08-30 11:51:12,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082735101] [2023-08-30 11:51:12,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:51:12,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 11:51:12,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:51:12,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 11:51:12,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=675, Unknown=1, NotChecked=52, Total=812 [2023-08-30 11:51:12,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 300 [2023-08-30 11:51:12,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 597 transitions, 11129 flow. Second operand has 29 states, 29 states have (on average 93.44827586206897) internal successors, (2710), 29 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:12,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:51:12,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 300 [2023-08-30 11:51:12,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:51:14,624 INFO L130 PetriNetUnfolder]: 3198/5717 cut-off events. [2023-08-30 11:51:14,624 INFO L131 PetriNetUnfolder]: For 69644/69646 co-relation queries the response was YES. [2023-08-30 11:51:14,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47978 conditions, 5717 events. 3198/5717 cut-off events. For 69644/69646 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 40025 event pairs, 100 based on Foata normal form. 72/5701 useless extension candidates. Maximal degree in co-relation 47902. Up to 2294 conditions per place. [2023-08-30 11:51:14,679 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 334 selfloop transitions, 464 changer transitions 1/800 dead transitions. [2023-08-30 11:51:14,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 800 transitions, 15709 flow [2023-08-30 11:51:14,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 11:51:14,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 11:51:14,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1848 transitions. [2023-08-30 11:51:14,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32421052631578945 [2023-08-30 11:51:14,681 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1848 transitions. [2023-08-30 11:51:14,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1848 transitions. [2023-08-30 11:51:14,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:51:14,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1848 transitions. [2023-08-30 11:51:14,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 97.26315789473684) internal successors, (1848), 19 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:14,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 300.0) internal successors, (6000), 20 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:14,685 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 300.0) internal successors, (6000), 20 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:14,685 INFO L175 Difference]: Start difference. First operand has 234 places, 597 transitions, 11129 flow. Second operand 19 states and 1848 transitions. [2023-08-30 11:51:14,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 800 transitions, 15709 flow [2023-08-30 11:51:15,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 800 transitions, 15326 flow, removed 153 selfloop flow, removed 7 redundant places. [2023-08-30 11:51:15,198 INFO L231 Difference]: Finished difference. Result has 246 places, 662 transitions, 13078 flow [2023-08-30 11:51:15,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=10783, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=395, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=13078, PETRI_PLACES=246, PETRI_TRANSITIONS=662} [2023-08-30 11:51:15,199 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 215 predicate places. [2023-08-30 11:51:15,199 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 662 transitions, 13078 flow [2023-08-30 11:51:15,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 93.44827586206897) internal successors, (2710), 29 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:15,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:51:15,200 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:51:15,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-08-30 11:51:15,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:51:15,405 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:51:15,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:51:15,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1363351471, now seen corresponding path program 5 times [2023-08-30 11:51:15,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:51:15,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473321666] [2023-08-30 11:51:15,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:51:15,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:51:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:51:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:15,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:51:15,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473321666] [2023-08-30 11:51:15,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473321666] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:51:15,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703323359] [2023-08-30 11:51:15,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:51:15,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:51:15,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:51:15,883 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:51:15,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-30 11:51:16,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 11:51:16,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:51:16,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-30 11:51:16,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:51:16,105 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 11:51:16,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:51:16,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:51:16,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:51:16,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 11:51:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:16,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:51:17,329 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:51:17,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 390 treesize of output 247 [2023-08-30 11:51:17,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:51:17,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1641 treesize of output 1511 [2023-08-30 11:51:17,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:51:17,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 661 treesize of output 678 [2023-08-30 11:51:17,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:51:17,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 621 treesize of output 598 [2023-08-30 11:51:17,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:51:17,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 541 treesize of output 552 [2023-08-30 11:51:17,795 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:51:17,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 495 treesize of output 460 [2023-08-30 11:51:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:35,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703323359] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:51:35,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:51:35,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2023-08-30 11:51:35,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414032998] [2023-08-30 11:51:35,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:51:35,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-30 11:51:35,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:51:35,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-30 11:51:35,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1182, Unknown=1, NotChecked=0, Total=1332 [2023-08-30 11:51:38,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 11:51:38,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 662 transitions, 13078 flow. Second operand has 37 states, 37 states have (on average 90.21621621621621) internal successors, (3338), 37 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:38,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:51:38,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 11:51:38,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:51:57,371 INFO L130 PetriNetUnfolder]: 4540/8050 cut-off events. [2023-08-30 11:51:57,371 INFO L131 PetriNetUnfolder]: For 106456/106458 co-relation queries the response was YES. [2023-08-30 11:51:57,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68322 conditions, 8050 events. 4540/8050 cut-off events. For 106456/106458 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 59668 event pairs, 498 based on Foata normal form. 0/7856 useless extension candidates. Maximal degree in co-relation 68244. Up to 4368 conditions per place. [2023-08-30 11:51:57,447 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 728 selfloop transitions, 625 changer transitions 1/1355 dead transitions. [2023-08-30 11:51:57,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 1355 transitions, 25544 flow [2023-08-30 11:51:57,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-30 11:51:57,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-30 11:51:57,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 7187 transitions. [2023-08-30 11:51:57,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.315219298245614 [2023-08-30 11:51:57,452 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 7187 transitions. [2023-08-30 11:51:57,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 7187 transitions. [2023-08-30 11:51:57,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:51:57,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 7187 transitions. [2023-08-30 11:51:57,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 94.5657894736842) internal successors, (7187), 76 states have internal predecessors, (7187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:57,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 300.0) internal successors, (23100), 77 states have internal predecessors, (23100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:57,470 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 300.0) internal successors, (23100), 77 states have internal predecessors, (23100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:57,470 INFO L175 Difference]: Start difference. First operand has 246 places, 662 transitions, 13078 flow. Second operand 76 states and 7187 transitions. [2023-08-30 11:51:57,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 1355 transitions, 25544 flow [2023-08-30 11:51:58,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 1355 transitions, 24900 flow, removed 44 selfloop flow, removed 14 redundant places. [2023-08-30 11:51:58,036 INFO L231 Difference]: Finished difference. Result has 331 places, 1141 transitions, 22734 flow [2023-08-30 11:51:58,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=12655, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=22734, PETRI_PLACES=331, PETRI_TRANSITIONS=1141} [2023-08-30 11:51:58,037 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 300 predicate places. [2023-08-30 11:51:58,037 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 1141 transitions, 22734 flow [2023-08-30 11:51:58,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 90.21621621621621) internal successors, (3338), 37 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:51:58,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:51:58,038 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:51:58,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-30 11:51:58,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-30 11:51:58,244 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:51:58,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:51:58,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1446557681, now seen corresponding path program 10 times [2023-08-30 11:51:58,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:51:58,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912021857] [2023-08-30 11:51:58,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:51:58,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:51:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:51:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:59,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:51:59,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912021857] [2023-08-30 11:51:59,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912021857] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:51:59,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546169530] [2023-08-30 11:51:59,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 11:51:59,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:51:59,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:51:59,146 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:51:59,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-30 11:51:59,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 11:51:59,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:51:59,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 11:51:59,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:51:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:51:59,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:51:59,938 INFO L321 Elim1Store]: treesize reduction 21, result has 75.3 percent of original size [2023-08-30 11:51:59,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 82 [2023-08-30 11:52:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:52:00,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546169530] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:52:00,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:52:00,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2023-08-30 11:52:00,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528317337] [2023-08-30 11:52:00,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:52:00,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 11:52:00,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:52:00,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 11:52:00,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2023-08-30 11:52:01,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 300 [2023-08-30 11:52:01,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 1141 transitions, 22734 flow. Second operand has 36 states, 36 states have (on average 107.25) internal successors, (3861), 36 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:01,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:52:01,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 300 [2023-08-30 11:52:01,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:52:07,520 INFO L130 PetriNetUnfolder]: 5817/10247 cut-off events. [2023-08-30 11:52:07,520 INFO L131 PetriNetUnfolder]: For 145469/145471 co-relation queries the response was YES. [2023-08-30 11:52:07,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89847 conditions, 10247 events. 5817/10247 cut-off events. For 145469/145471 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 78569 event pairs, 590 based on Foata normal form. 304/10141 useless extension candidates. Maximal degree in co-relation 89746. Up to 5627 conditions per place. [2023-08-30 11:52:07,634 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 901 selfloop transitions, 847 changer transitions 1/1750 dead transitions. [2023-08-30 11:52:07,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1750 transitions, 36171 flow [2023-08-30 11:52:07,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-30 11:52:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-30 11:52:07,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 5164 transitions. [2023-08-30 11:52:07,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37420289855072464 [2023-08-30 11:52:07,637 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 5164 transitions. [2023-08-30 11:52:07,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 5164 transitions. [2023-08-30 11:52:07,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:52:07,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 5164 transitions. [2023-08-30 11:52:07,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 112.26086956521739) internal successors, (5164), 46 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:07,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 300.0) internal successors, (14100), 47 states have internal predecessors, (14100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:07,647 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 300.0) internal successors, (14100), 47 states have internal predecessors, (14100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:07,647 INFO L175 Difference]: Start difference. First operand has 331 places, 1141 transitions, 22734 flow. Second operand 46 states and 5164 transitions. [2023-08-30 11:52:07,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1750 transitions, 36171 flow [2023-08-30 11:52:09,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 1750 transitions, 29982 flow, removed 3011 selfloop flow, removed 11 redundant places. [2023-08-30 11:52:09,190 INFO L231 Difference]: Finished difference. Result has 389 places, 1545 transitions, 28317 flow [2023-08-30 11:52:09,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=19558, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=491, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=28317, PETRI_PLACES=389, PETRI_TRANSITIONS=1545} [2023-08-30 11:52:09,191 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 358 predicate places. [2023-08-30 11:52:09,191 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 1545 transitions, 28317 flow [2023-08-30 11:52:09,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 107.25) internal successors, (3861), 36 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:09,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:52:09,192 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:52:09,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-08-30 11:52:09,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-30 11:52:09,398 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:52:09,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:52:09,398 INFO L85 PathProgramCache]: Analyzing trace with hash 518419664, now seen corresponding path program 5 times [2023-08-30 11:52:09,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:52:09,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140089920] [2023-08-30 11:52:09,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:52:09,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:52:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:52:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:52:09,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:52:09,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140089920] [2023-08-30 11:52:09,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140089920] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:52:09,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660749180] [2023-08-30 11:52:09,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:52:09,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:52:09,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:52:09,771 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:52:09,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-30 11:52:09,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 11:52:09,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:52:09,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 11:52:09,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:52:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:52:10,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:52:10,247 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 11:52:10,247 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 25 treesize of output 13 [2023-08-30 11:52:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:52:10,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660749180] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:52:10,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:52:10,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-30 11:52:10,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108496944] [2023-08-30 11:52:10,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:52:10,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 11:52:10,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:52:10,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 11:52:10,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2023-08-30 11:52:11,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 300 [2023-08-30 11:52:11,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 1545 transitions, 28317 flow. Second operand has 32 states, 32 states have (on average 112.40625) internal successors, (3597), 32 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:11,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:52:11,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 300 [2023-08-30 11:52:11,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:52:17,081 INFO L130 PetriNetUnfolder]: 6948/12190 cut-off events. [2023-08-30 11:52:17,081 INFO L131 PetriNetUnfolder]: For 152388/152390 co-relation queries the response was YES. [2023-08-30 11:52:17,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100419 conditions, 12190 events. 6948/12190 cut-off events. For 152388/152390 co-relation queries the response was YES. Maximal size of possible extension queue 876. Compared 95303 event pairs, 763 based on Foata normal form. 192/11750 useless extension candidates. Maximal degree in co-relation 100295. Up to 3803 conditions per place. [2023-08-30 11:52:17,247 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 766 selfloop transitions, 1256 changer transitions 104/2127 dead transitions. [2023-08-30 11:52:17,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 2127 transitions, 40956 flow [2023-08-30 11:52:17,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 11:52:17,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 11:52:17,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2687 transitions. [2023-08-30 11:52:17,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894202898550725 [2023-08-30 11:52:17,249 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2687 transitions. [2023-08-30 11:52:17,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2687 transitions. [2023-08-30 11:52:17,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:52:17,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2687 transitions. [2023-08-30 11:52:17,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 116.82608695652173) internal successors, (2687), 23 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:17,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 300.0) internal successors, (7200), 24 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:17,256 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 300.0) internal successors, (7200), 24 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:17,256 INFO L175 Difference]: Start difference. First operand has 389 places, 1545 transitions, 28317 flow. Second operand 23 states and 2687 transitions. [2023-08-30 11:52:17,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 2127 transitions, 40956 flow [2023-08-30 11:52:19,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 2127 transitions, 39353 flow, removed 743 selfloop flow, removed 12 redundant places. [2023-08-30 11:52:19,390 INFO L231 Difference]: Finished difference. Result has 407 places, 1933 transitions, 37058 flow [2023-08-30 11:52:19,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=27470, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=820, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=37058, PETRI_PLACES=407, PETRI_TRANSITIONS=1933} [2023-08-30 11:52:19,392 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 376 predicate places. [2023-08-30 11:52:19,392 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 1933 transitions, 37058 flow [2023-08-30 11:52:19,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 112.40625) internal successors, (3597), 32 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:19,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:52:19,393 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:52:19,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-30 11:52:19,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-08-30 11:52:19,593 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:52:19,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:52:19,594 INFO L85 PathProgramCache]: Analyzing trace with hash -503971615, now seen corresponding path program 11 times [2023-08-30 11:52:19,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:52:19,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221804889] [2023-08-30 11:52:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:52:19,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:52:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:52:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:52:20,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:52:20,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221804889] [2023-08-30 11:52:20,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221804889] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:52:20,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379037860] [2023-08-30 11:52:20,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 11:52:20,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:52:20,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:52:20,234 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:52:20,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-30 11:52:20,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 11:52:20,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:52:20,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-30 11:52:20,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:52:20,415 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 11:52:20,451 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 11:52:20,488 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 11:52:20,527 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 11:52:20,564 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 11:52:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:52:20,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:52:21,692 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:52:21,692 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 3 case distinctions, treesize of input 274 treesize of output 144 [2023-08-30 11:52:21,787 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-30 11:52:21,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 760 treesize of output 742 [2023-08-30 11:52:21,818 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 11:52:21,819 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 11:52:21,862 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:52:21,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 243 treesize of output 288 [2023-08-30 11:52:21,961 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-30 11:52:21,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 243 treesize of output 249 [2023-08-30 11:52:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:52:29,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379037860] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:52:29,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:52:29,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2023-08-30 11:52:29,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644520752] [2023-08-30 11:52:29,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:52:29,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-30 11:52:29,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:52:29,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-30 11:52:29,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1119, Unknown=5, NotChecked=0, Total=1332 [2023-08-30 11:52:31,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 11:52:31,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 1933 transitions, 37058 flow. Second operand has 37 states, 37 states have (on average 90.21621621621621) internal successors, (3338), 37 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:31,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:52:31,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 11:52:31,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:52:40,273 INFO L130 PetriNetUnfolder]: 8709/14849 cut-off events. [2023-08-30 11:52:40,273 INFO L131 PetriNetUnfolder]: For 199493/199495 co-relation queries the response was YES. [2023-08-30 11:52:40,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129932 conditions, 14849 events. 8709/14849 cut-off events. For 199493/199495 co-relation queries the response was YES. Maximal size of possible extension queue 1002. Compared 114716 event pairs, 1020 based on Foata normal form. 430/14441 useless extension candidates. Maximal degree in co-relation 129801. Up to 6834 conditions per place. [2023-08-30 11:52:40,505 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 1798 selfloop transitions, 989 changer transitions 1/2789 dead transitions. [2023-08-30 11:52:40,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 2789 transitions, 56977 flow [2023-08-30 11:52:40,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 11:52:40,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 11:52:40,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3144 transitions. [2023-08-30 11:52:40,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31757575757575757 [2023-08-30 11:52:40,508 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3144 transitions. [2023-08-30 11:52:40,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3144 transitions. [2023-08-30 11:52:40,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:52:40,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3144 transitions. [2023-08-30 11:52:40,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 95.27272727272727) internal successors, (3144), 33 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:40,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 300.0) internal successors, (10200), 34 states have internal predecessors, (10200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:40,515 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 300.0) internal successors, (10200), 34 states have internal predecessors, (10200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:40,515 INFO L175 Difference]: Start difference. First operand has 407 places, 1933 transitions, 37058 flow. Second operand 33 states and 3144 transitions. [2023-08-30 11:52:40,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 2789 transitions, 56977 flow [2023-08-30 11:52:44,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 2789 transitions, 53574 flow, removed 1678 selfloop flow, removed 10 redundant places. [2023-08-30 11:52:44,888 INFO L231 Difference]: Finished difference. Result has 435 places, 2507 transitions, 48760 flow [2023-08-30 11:52:44,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=34519, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=470, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=48760, PETRI_PLACES=435, PETRI_TRANSITIONS=2507} [2023-08-30 11:52:44,890 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 404 predicate places. [2023-08-30 11:52:44,890 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 2507 transitions, 48760 flow [2023-08-30 11:52:44,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 90.21621621621621) internal successors, (3338), 37 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:44,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:52:44,891 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:52:44,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-30 11:52:45,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:52:45,097 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:52:45,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:52:45,097 INFO L85 PathProgramCache]: Analyzing trace with hash -781245314, now seen corresponding path program 6 times [2023-08-30 11:52:45,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:52:45,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762210519] [2023-08-30 11:52:45,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:52:45,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:52:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:52:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:52:45,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:52:45,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762210519] [2023-08-30 11:52:45,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762210519] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:52:45,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308536718] [2023-08-30 11:52:45,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:52:45,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:52:45,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:52:45,803 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:52:45,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-30 11:52:45,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 11:52:45,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:52:45,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 11:52:45,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:52:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 11:52:46,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:52:46,137 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-30 11:52:46,137 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 25 treesize of output 13 [2023-08-30 11:52:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-30 11:52:46,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308536718] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:52:46,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:52:46,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 5] total 20 [2023-08-30 11:52:46,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653669221] [2023-08-30 11:52:46,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:52:46,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 11:52:46,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:52:46,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 11:52:46,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-08-30 11:52:47,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-08-30 11:52:47,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 2507 transitions, 48760 flow. Second operand has 22 states, 22 states have (on average 114.54545454545455) internal successors, (2520), 22 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:47,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:52:47,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-08-30 11:52:47,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:52:57,025 INFO L130 PetriNetUnfolder]: 8032/14140 cut-off events. [2023-08-30 11:52:57,025 INFO L131 PetriNetUnfolder]: For 192449/192451 co-relation queries the response was YES. [2023-08-30 11:52:57,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125149 conditions, 14140 events. 8032/14140 cut-off events. For 192449/192451 co-relation queries the response was YES. Maximal size of possible extension queue 1030. Compared 113468 event pairs, 384 based on Foata normal form. 797/14161 useless extension candidates. Maximal degree in co-relation 125004. Up to 8254 conditions per place. [2023-08-30 11:52:57,238 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 1238 selfloop transitions, 1271 changer transitions 51/2561 dead transitions. [2023-08-30 11:52:57,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 2561 transitions, 53552 flow [2023-08-30 11:52:57,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 11:52:57,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 11:52:57,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4282 transitions. [2023-08-30 11:52:57,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964814814814815 [2023-08-30 11:52:57,241 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4282 transitions. [2023-08-30 11:52:57,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4282 transitions. [2023-08-30 11:52:57,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:52:57,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4282 transitions. [2023-08-30 11:52:57,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 118.94444444444444) internal successors, (4282), 36 states have internal predecessors, (4282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:57,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 300.0) internal successors, (11100), 37 states have internal predecessors, (11100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:57,249 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 300.0) internal successors, (11100), 37 states have internal predecessors, (11100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:52:57,249 INFO L175 Difference]: Start difference. First operand has 435 places, 2507 transitions, 48760 flow. Second operand 36 states and 4282 transitions. [2023-08-30 11:52:57,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 2561 transitions, 53552 flow [2023-08-30 11:53:00,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 2561 transitions, 52082 flow, removed 637 selfloop flow, removed 13 redundant places. [2023-08-30 11:53:00,457 INFO L231 Difference]: Finished difference. Result has 469 places, 2398 transitions, 49145 flow [2023-08-30 11:53:00,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=38304, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2011, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=890, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=952, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=49145, PETRI_PLACES=469, PETRI_TRANSITIONS=2398} [2023-08-30 11:53:00,459 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 438 predicate places. [2023-08-30 11:53:00,459 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 2398 transitions, 49145 flow [2023-08-30 11:53:00,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 114.54545454545455) internal successors, (2520), 22 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:53:00,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:53:00,459 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:53:00,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-30 11:53:00,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:53:00,661 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:53:00,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:53:00,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1864888131, now seen corresponding path program 12 times [2023-08-30 11:53:00,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:53:00,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95279439] [2023-08-30 11:53:00,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:53:00,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:53:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:53:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:53:01,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:53:01,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95279439] [2023-08-30 11:53:01,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95279439] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:53:01,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215929255] [2023-08-30 11:53:01,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:53:01,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:53:01,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:53:01,548 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:53:01,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-30 11:53:01,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 11:53:01,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:53:01,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-30 11:53:01,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:53:01,736 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 11:53:01,767 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 11:53:01,806 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 11:53:01,838 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 11:53:01,864 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 11:53:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:53:02,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:53:03,022 INFO L321 Elim1Store]: treesize reduction 40, result has 55.1 percent of original size [2023-08-30 11:53:03,022 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 3 case distinctions, treesize of input 269 treesize of output 155 [2023-08-30 11:53:03,139 INFO L321 Elim1Store]: treesize reduction 21, result has 85.1 percent of original size [2023-08-30 11:53:03,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 387 treesize of output 446 [2023-08-30 11:53:03,209 INFO L321 Elim1Store]: treesize reduction 24, result has 71.8 percent of original size [2023-08-30 11:53:03,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 312 treesize of output 292 [2023-08-30 11:53:03,278 INFO L321 Elim1Store]: treesize reduction 24, result has 71.8 percent of original size [2023-08-30 11:53:03,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 205 treesize of output 225 [2023-08-30 11:53:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:53:16,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215929255] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:53:16,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:53:16,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-30 11:53:16,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47741514] [2023-08-30 11:53:16,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:53:16,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 11:53:16,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:53:16,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 11:53:16,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1164, Unknown=6, NotChecked=0, Total=1406 [2023-08-30 11:53:16,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 11:53:16,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 2398 transitions, 49145 flow. Second operand has 38 states, 38 states have (on average 90.1842105263158) internal successors, (3427), 38 states have internal predecessors, (3427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:53:16,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:53:16,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 11:53:16,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:53:40,795 INFO L130 PetriNetUnfolder]: 10130/17793 cut-off events. [2023-08-30 11:53:40,795 INFO L131 PetriNetUnfolder]: For 262791/262793 co-relation queries the response was YES. [2023-08-30 11:53:41,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167557 conditions, 17793 events. 10130/17793 cut-off events. For 262791/262793 co-relation queries the response was YES. Maximal size of possible extension queue 1188. Compared 144535 event pairs, 1285 based on Foata normal form. 316/17069 useless extension candidates. Maximal degree in co-relation 167403. Up to 13869 conditions per place. [2023-08-30 11:53:41,117 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 2451 selfloop transitions, 883 changer transitions 7/3342 dead transitions. [2023-08-30 11:53:41,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 3342 transitions, 74751 flow [2023-08-30 11:53:41,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 11:53:41,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 11:53:41,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4525 transitions. [2023-08-30 11:53:41,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3142361111111111 [2023-08-30 11:53:41,120 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4525 transitions. [2023-08-30 11:53:41,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4525 transitions. [2023-08-30 11:53:41,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:53:41,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4525 transitions. [2023-08-30 11:53:41,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 94.27083333333333) internal successors, (4525), 48 states have internal predecessors, (4525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:53:41,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 300.0) internal successors, (14700), 49 states have internal predecessors, (14700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:53:41,130 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 300.0) internal successors, (14700), 49 states have internal predecessors, (14700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:53:41,130 INFO L175 Difference]: Start difference. First operand has 469 places, 2398 transitions, 49145 flow. Second operand 48 states and 4525 transitions. [2023-08-30 11:53:41,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 3342 transitions, 74751 flow [2023-08-30 11:53:46,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 3342 transitions, 73111 flow, removed 649 selfloop flow, removed 15 redundant places. [2023-08-30 11:53:47,025 INFO L231 Difference]: Finished difference. Result has 525 places, 3099 transitions, 67110 flow [2023-08-30 11:53:47,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=47661, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1719, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=67110, PETRI_PLACES=525, PETRI_TRANSITIONS=3099} [2023-08-30 11:53:47,026 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 494 predicate places. [2023-08-30 11:53:47,026 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 3099 transitions, 67110 flow [2023-08-30 11:53:47,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 90.1842105263158) internal successors, (3427), 38 states have internal predecessors, (3427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:53:47,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:53:47,027 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:53:47,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-08-30 11:53:47,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:53:47,227 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:53:47,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:53:47,228 INFO L85 PathProgramCache]: Analyzing trace with hash -325974205, now seen corresponding path program 13 times [2023-08-30 11:53:47,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:53:47,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354803578] [2023-08-30 11:53:47,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:53:47,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:53:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:53:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:53:47,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:53:47,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354803578] [2023-08-30 11:53:47,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354803578] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:53:47,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343115361] [2023-08-30 11:53:47,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:53:47,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:53:47,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:53:47,882 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:53:47,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-30 11:53:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:53:48,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-30 11:53:48,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:53:48,122 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 11:53:48,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 11:53:48,204 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 11:53:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:53:48,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:53:49,058 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:53:49,058 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 179 treesize of output 119 [2023-08-30 11:53:49,121 INFO L321 Elim1Store]: treesize reduction 21, result has 75.3 percent of original size [2023-08-30 11:53:49,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 364 treesize of output 375 [2023-08-30 11:53:49,190 INFO L321 Elim1Store]: treesize reduction 24, result has 71.8 percent of original size [2023-08-30 11:53:49,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 312 treesize of output 292 [2023-08-30 11:53:49,258 INFO L321 Elim1Store]: treesize reduction 24, result has 71.8 percent of original size [2023-08-30 11:53:49,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 205 treesize of output 225 [2023-08-30 11:53:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:53:51,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343115361] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:53:51,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:53:51,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2023-08-30 11:53:51,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555363236] [2023-08-30 11:53:51,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:53:51,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-30 11:53:51,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:53:51,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-30 11:53:51,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1064, Unknown=4, NotChecked=0, Total=1332 [2023-08-30 11:53:52,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 11:53:52,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 3099 transitions, 67110 flow. Second operand has 37 states, 37 states have (on average 90.21621621621621) internal successors, (3338), 37 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:53:52,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:53:52,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 11:53:52,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:54:05,204 INFO L130 PetriNetUnfolder]: 9057/15710 cut-off events. [2023-08-30 11:54:05,204 INFO L131 PetriNetUnfolder]: For 254575/254577 co-relation queries the response was YES. [2023-08-30 11:54:05,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150261 conditions, 15710 events. 9057/15710 cut-off events. For 254575/254577 co-relation queries the response was YES. Maximal size of possible extension queue 1084. Compared 124575 event pairs, 1285 based on Foata normal form. 144/15090 useless extension candidates. Maximal degree in co-relation 150091. Up to 13935 conditions per place. [2023-08-30 11:54:05,631 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 2332 selfloop transitions, 640 changer transitions 5/2978 dead transitions. [2023-08-30 11:54:05,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 2978 transitions, 67137 flow [2023-08-30 11:54:05,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 11:54:05,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 11:54:05,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4084 transitions. [2023-08-30 11:54:05,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3093939393939394 [2023-08-30 11:54:05,634 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4084 transitions. [2023-08-30 11:54:05,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4084 transitions. [2023-08-30 11:54:05,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:54:05,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4084 transitions. [2023-08-30 11:54:05,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 92.81818181818181) internal successors, (4084), 44 states have internal predecessors, (4084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:05,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 300.0) internal successors, (13500), 45 states have internal predecessors, (13500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:05,642 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 300.0) internal successors, (13500), 45 states have internal predecessors, (13500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:05,642 INFO L175 Difference]: Start difference. First operand has 525 places, 3099 transitions, 67110 flow. Second operand 44 states and 4084 transitions. [2023-08-30 11:54:05,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 2978 transitions, 67137 flow [2023-08-30 11:54:11,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 2978 transitions, 66080 flow, removed 494 selfloop flow, removed 28 redundant places. [2023-08-30 11:54:11,428 INFO L231 Difference]: Finished difference. Result has 541 places, 2828 transitions, 60356 flow [2023-08-30 11:54:11,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=53158, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=402, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1962, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=60356, PETRI_PLACES=541, PETRI_TRANSITIONS=2828} [2023-08-30 11:54:11,430 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 510 predicate places. [2023-08-30 11:54:11,430 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 2828 transitions, 60356 flow [2023-08-30 11:54:11,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 90.21621621621621) internal successors, (3338), 37 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:11,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:54:11,431 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:54:11,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-08-30 11:54:11,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-08-30 11:54:11,633 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:54:11,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:54:11,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2042562075, now seen corresponding path program 6 times [2023-08-30 11:54:11,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:54:11,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083897527] [2023-08-30 11:54:11,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:54:11,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:54:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:54:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:54:12,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:54:12,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083897527] [2023-08-30 11:54:12,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083897527] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:54:12,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801963595] [2023-08-30 11:54:12,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 11:54:12,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:54:12,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:54:12,438 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:54:12,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-30 11:54:12,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 11:54:12,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:54:12,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-30 11:54:12,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:54:12,695 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 11:54:12,734 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 11:54:12,793 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 11:54:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:54:13,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:54:13,732 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:54:13,732 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 121 treesize of output 85 [2023-08-30 11:54:13,764 INFO L321 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2023-08-30 11:54:13,764 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 258 treesize of output 254 [2023-08-30 11:54:13,800 INFO L321 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2023-08-30 11:54:13,800 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 224 treesize of output 202 [2023-08-30 11:54:13,837 INFO L321 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2023-08-30 11:54:13,837 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 145 treesize of output 149 [2023-08-30 11:54:15,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:54:15,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801963595] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:54:15,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:54:15,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2023-08-30 11:54:15,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506014679] [2023-08-30 11:54:15,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:54:15,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 11:54:15,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:54:15,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 11:54:15,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1029, Unknown=3, NotChecked=0, Total=1260 [2023-08-30 11:54:17,152 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 11:54:17,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 11:54:17,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 2828 transitions, 60356 flow. Second operand has 36 states, 36 states have (on average 90.25) internal successors, (3249), 36 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:17,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:54:17,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 11:54:17,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:54:30,522 INFO L130 PetriNetUnfolder]: 6040/11271 cut-off events. [2023-08-30 11:54:30,522 INFO L131 PetriNetUnfolder]: For 238346/238348 co-relation queries the response was YES. [2023-08-30 11:54:30,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114822 conditions, 11271 events. 6040/11271 cut-off events. For 238346/238348 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 91464 event pairs, 857 based on Foata normal form. 1222/12255 useless extension candidates. Maximal degree in co-relation 114657. Up to 4534 conditions per place. [2023-08-30 11:54:30,919 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 958 selfloop transitions, 1405 changer transitions 40/2404 dead transitions. [2023-08-30 11:54:30,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 2404 transitions, 57735 flow [2023-08-30 11:54:30,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-30 11:54:30,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-30 11:54:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4840 transitions. [2023-08-30 11:54:30,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31633986928104574 [2023-08-30 11:54:30,932 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4840 transitions. [2023-08-30 11:54:30,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4840 transitions. [2023-08-30 11:54:30,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:54:30,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4840 transitions. [2023-08-30 11:54:30,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 94.90196078431373) internal successors, (4840), 51 states have internal predecessors, (4840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:30,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 300.0) internal successors, (15600), 52 states have internal predecessors, (15600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:30,947 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 300.0) internal successors, (15600), 52 states have internal predecessors, (15600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:30,947 INFO L175 Difference]: Start difference. First operand has 541 places, 2828 transitions, 60356 flow. Second operand 51 states and 4840 transitions. [2023-08-30 11:54:30,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 2404 transitions, 57735 flow [2023-08-30 11:54:34,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 2404 transitions, 56253 flow, removed 508 selfloop flow, removed 22 redundant places. [2023-08-30 11:54:34,659 INFO L231 Difference]: Finished difference. Result has 571 places, 2237 transitions, 54004 flow [2023-08-30 11:54:34,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=40039, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1816, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=982, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=821, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=54004, PETRI_PLACES=571, PETRI_TRANSITIONS=2237} [2023-08-30 11:54:34,660 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 540 predicate places. [2023-08-30 11:54:34,660 INFO L495 AbstractCegarLoop]: Abstraction has has 571 places, 2237 transitions, 54004 flow [2023-08-30 11:54:34,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 90.25) internal successors, (3249), 36 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:34,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:54:34,661 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:54:34,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-30 11:54:34,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-08-30 11:54:34,867 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:54:34,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:54:34,867 INFO L85 PathProgramCache]: Analyzing trace with hash 507814293, now seen corresponding path program 14 times [2023-08-30 11:54:34,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:54:34,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524501400] [2023-08-30 11:54:34,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:54:34,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:54:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:54:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:54:35,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:54:35,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524501400] [2023-08-30 11:54:35,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524501400] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:54:35,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681214346] [2023-08-30 11:54:35,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:54:35,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:54:35,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:54:35,561 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:54:35,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-30 11:54:35,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:54:35,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:54:35,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 66 conjunts are in the unsatisfiable core [2023-08-30 11:54:35,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:54:35,815 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 11:54:35,857 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 11:54:35,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:54:35,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2023-08-30 11:54:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:54:36,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:54:36,993 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:54:36,993 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 172 treesize of output 112 [2023-08-30 11:54:37,068 INFO L321 Elim1Store]: treesize reduction 36, result has 65.0 percent of original size [2023-08-30 11:54:37,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 510 treesize of output 491 [2023-08-30 11:54:37,086 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 11:54:37,087 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 11:54:37,089 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 11:54:37,090 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 11:54:37,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:54:37,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 161 treesize of output 188 [2023-08-30 11:54:37,148 INFO L321 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2023-08-30 11:54:37,148 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 125 treesize of output 83 [2023-08-30 11:54:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:54:39,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681214346] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:54:39,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:54:39,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-30 11:54:39,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237357519] [2023-08-30 11:54:39,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:54:39,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 11:54:39,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:54:39,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 11:54:39,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1128, Unknown=1, NotChecked=0, Total=1406 [2023-08-30 11:54:40,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 11:54:40,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 571 places, 2237 transitions, 54004 flow. Second operand has 38 states, 38 states have (on average 90.1842105263158) internal successors, (3427), 38 states have internal predecessors, (3427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:40,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:54:40,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 11:54:40,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:54:51,364 INFO L130 PetriNetUnfolder]: 5950/10985 cut-off events. [2023-08-30 11:54:51,364 INFO L131 PetriNetUnfolder]: For 246120/246120 co-relation queries the response was YES. [2023-08-30 11:54:51,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120528 conditions, 10985 events. 5950/10985 cut-off events. For 246120/246120 co-relation queries the response was YES. Maximal size of possible extension queue 743. Compared 87804 event pairs, 1046 based on Foata normal form. 268/11075 useless extension candidates. Maximal degree in co-relation 120347. Up to 4534 conditions per place. [2023-08-30 11:54:51,721 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 1504 selfloop transitions, 875 changer transitions 0/2380 dead transitions. [2023-08-30 11:54:51,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 2380 transitions, 62346 flow [2023-08-30 11:54:51,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 11:54:51,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 11:54:51,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3766 transitions. [2023-08-30 11:54:51,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31383333333333335 [2023-08-30 11:54:51,726 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3766 transitions. [2023-08-30 11:54:51,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3766 transitions. [2023-08-30 11:54:51,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:54:51,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3766 transitions. [2023-08-30 11:54:51,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 94.15) internal successors, (3766), 40 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:51,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 300.0) internal successors, (12300), 41 states have internal predecessors, (12300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:51,737 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 300.0) internal successors, (12300), 41 states have internal predecessors, (12300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:51,737 INFO L175 Difference]: Start difference. First operand has 571 places, 2237 transitions, 54004 flow. Second operand 40 states and 3766 transitions. [2023-08-30 11:54:51,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 2380 transitions, 62346 flow [2023-08-30 11:54:56,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 2380 transitions, 56979 flow, removed 2548 selfloop flow, removed 18 redundant places. [2023-08-30 11:54:56,725 INFO L231 Difference]: Finished difference. Result has 598 places, 2291 transitions, 54196 flow [2023-08-30 11:54:56,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=47165, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=724, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=54196, PETRI_PLACES=598, PETRI_TRANSITIONS=2291} [2023-08-30 11:54:56,728 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 567 predicate places. [2023-08-30 11:54:56,728 INFO L495 AbstractCegarLoop]: Abstraction has has 598 places, 2291 transitions, 54196 flow [2023-08-30 11:54:56,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 90.1842105263158) internal successors, (3427), 38 states have internal predecessors, (3427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:54:56,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:54:56,729 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:54:56,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-30 11:54:56,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-08-30 11:54:56,934 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:54:56,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:54:56,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2042562022, now seen corresponding path program 7 times [2023-08-30 11:54:56,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:54:56,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614299215] [2023-08-30 11:54:56,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:54:56,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:54:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:54:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:54:57,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:54:57,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614299215] [2023-08-30 11:54:57,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614299215] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:54:57,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747374977] [2023-08-30 11:54:57,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:54:57,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:54:57,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:54:57,259 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:54:57,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-30 11:54:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:54:57,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 11:54:57,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:54:57,490 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 11:54:57,522 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 11:54:57,580 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 11:54:57,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:54:57,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:54:58,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:54:58,116 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 11:54:58,124 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-30 11:54:58,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 133 [2023-08-30 11:54:58,131 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 11:54:58,131 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 130 treesize of output 102 [2023-08-30 11:54:58,137 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 11:54:58,138 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 81 treesize of output 67 [2023-08-30 11:54:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:54:58,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747374977] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:54:58,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:54:58,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2023-08-30 11:54:58,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916974962] [2023-08-30 11:54:58,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:54:58,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 11:54:58,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:54:58,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 11:54:58,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=917, Unknown=4, NotChecked=0, Total=1122 [2023-08-30 11:55:00,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:55:03,769 WARN L539 Checker$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 11:55:03,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 11:55:03,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 2291 transitions, 54196 flow. Second operand has 34 states, 34 states have (on average 90.32352941176471) internal successors, (3071), 34 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:03,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:55:03,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 11:55:03,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:55:06,324 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 11:55:11,344 INFO L130 PetriNetUnfolder]: 3287/6202 cut-off events. [2023-08-30 11:55:11,344 INFO L131 PetriNetUnfolder]: For 155804/155804 co-relation queries the response was YES. [2023-08-30 11:55:11,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65878 conditions, 6202 events. 3287/6202 cut-off events. For 155804/155804 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 46881 event pairs, 436 based on Foata normal form. 455/6549 useless extension candidates. Maximal degree in co-relation 65700. Up to 4307 conditions per place. [2023-08-30 11:55:11,446 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 846 selfloop transitions, 316 changer transitions 32/1195 dead transitions. [2023-08-30 11:55:11,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 588 places, 1195 transitions, 30348 flow [2023-08-30 11:55:11,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 11:55:11,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 11:55:11,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3375 transitions. [2023-08-30 11:55:11,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3125 [2023-08-30 11:55:11,449 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3375 transitions. [2023-08-30 11:55:11,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3375 transitions. [2023-08-30 11:55:11,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:55:11,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3375 transitions. [2023-08-30 11:55:11,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 93.75) internal successors, (3375), 36 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:11,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 300.0) internal successors, (11100), 37 states have internal predecessors, (11100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:11,460 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 300.0) internal successors, (11100), 37 states have internal predecessors, (11100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:11,460 INFO L175 Difference]: Start difference. First operand has 598 places, 2291 transitions, 54196 flow. Second operand 36 states and 3375 transitions. [2023-08-30 11:55:11,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 588 places, 1195 transitions, 30348 flow [2023-08-30 11:55:13,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 1195 transitions, 27769 flow, removed 313 selfloop flow, removed 83 redundant places. [2023-08-30 11:55:13,311 INFO L231 Difference]: Finished difference. Result has 511 places, 1089 transitions, 25125 flow [2023-08-30 11:55:13,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=24561, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=784, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=25125, PETRI_PLACES=511, PETRI_TRANSITIONS=1089} [2023-08-30 11:55:13,312 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 480 predicate places. [2023-08-30 11:55:13,312 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 1089 transitions, 25125 flow [2023-08-30 11:55:13,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 90.32352941176471) internal successors, (3071), 34 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:13,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:55:13,313 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:55:13,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-08-30 11:55:13,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-08-30 11:55:13,513 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:55:13,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:55:13,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1099379972, now seen corresponding path program 7 times [2023-08-30 11:55:13,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:55:13,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402836399] [2023-08-30 11:55:13,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:55:13,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:55:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:55:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:55:13,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:55:13,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402836399] [2023-08-30 11:55:13,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402836399] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:55:13,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942330071] [2023-08-30 11:55:13,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:55:13,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:55:13,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:55:13,838 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:55:13,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-30 11:55:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:55:13,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-30 11:55:13,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:55:14,091 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 11:55:14,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:55:14,138 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 11:55:14,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:55:14,245 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 25 treesize of output 25 [2023-08-30 11:55:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:55:14,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:55:17,113 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:55:17,113 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 145 treesize of output 97 [2023-08-30 11:55:17,211 INFO L321 Elim1Store]: treesize reduction 8, result has 92.7 percent of original size [2023-08-30 11:55:17,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 261 treesize of output 311 [2023-08-30 11:55:17,242 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:55:17,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 158 [2023-08-30 11:55:17,392 INFO L321 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-08-30 11:55:17,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 125 treesize of output 149 [2023-08-30 11:55:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:55:31,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942330071] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:55:31,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:55:31,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 34 [2023-08-30 11:55:31,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12806363] [2023-08-30 11:55:31,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:55:31,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 11:55:31,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:55:31,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 11:55:31,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1091, Unknown=5, NotChecked=0, Total=1260 [2023-08-30 11:55:33,578 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 11:55:35,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:55:37,675 WARN L539 Checker$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 11:55:39,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:55:41,849 WARN L539 Checker$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 11:55:43,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:55:46,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 11:55:48,076 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 11:55:48,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-08-30 11:55:48,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 1089 transitions, 25125 flow. Second operand has 36 states, 36 states have (on average 90.25) internal successors, (3249), 36 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:48,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:55:48,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-08-30 11:55:48,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:55:55,569 INFO L130 PetriNetUnfolder]: 3378/6286 cut-off events. [2023-08-30 11:55:55,569 INFO L131 PetriNetUnfolder]: For 123231/123231 co-relation queries the response was YES. [2023-08-30 11:55:55,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63039 conditions, 6286 events. 3378/6286 cut-off events. For 123231/123231 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 46905 event pairs, 932 based on Foata normal form. 12/6216 useless extension candidates. Maximal degree in co-relation 62908. Up to 5405 conditions per place. [2023-08-30 11:55:55,663 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 947 selfloop transitions, 266 changer transitions 1/1215 dead transitions. [2023-08-30 11:55:55,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 1215 transitions, 29845 flow [2023-08-30 11:55:55,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-30 11:55:55,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-30 11:55:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2702 transitions. [2023-08-30 11:55:55,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31057471264367814 [2023-08-30 11:55:55,666 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2702 transitions. [2023-08-30 11:55:55,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2702 transitions. [2023-08-30 11:55:55,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:55:55,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2702 transitions. [2023-08-30 11:55:55,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 93.17241379310344) internal successors, (2702), 29 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:55,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 300.0) internal successors, (9000), 30 states have internal predecessors, (9000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:55,671 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 300.0) internal successors, (9000), 30 states have internal predecessors, (9000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:55,672 INFO L175 Difference]: Start difference. First operand has 511 places, 1089 transitions, 25125 flow. Second operand 29 states and 2702 transitions. [2023-08-30 11:55:55,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 1215 transitions, 29845 flow [2023-08-30 11:55:56,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 1215 transitions, 29067 flow, removed 135 selfloop flow, removed 20 redundant places. [2023-08-30 11:55:56,905 INFO L231 Difference]: Finished difference. Result has 515 places, 1149 transitions, 26660 flow [2023-08-30 11:55:56,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=24350, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1083, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=821, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=26660, PETRI_PLACES=515, PETRI_TRANSITIONS=1149} [2023-08-30 11:55:56,906 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 484 predicate places. [2023-08-30 11:55:56,906 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 1149 transitions, 26660 flow [2023-08-30 11:55:56,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 90.25) internal successors, (3249), 36 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:56,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:55:56,907 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:55:56,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-30 11:55:57,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-08-30 11:55:57,108 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:55:57,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:55:57,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1666163473, now seen corresponding path program 7 times [2023-08-30 11:55:57,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:55:57,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172911723] [2023-08-30 11:55:57,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:55:57,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:55:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:55:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:55:57,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:55:57,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172911723] [2023-08-30 11:55:57,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172911723] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:55:57,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857399082] [2023-08-30 11:55:57,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 11:55:57,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:55:57,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:55:57,865 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:55:57,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-30 11:55:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:55:58,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 11:55:58,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:55:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 11:55:58,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:55:58,271 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:55:58,271 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 11:55:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:55:58,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857399082] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:55:58,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:55:58,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 5] total 20 [2023-08-30 11:55:58,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46458419] [2023-08-30 11:55:58,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:55:58,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 11:55:58,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:55:58,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 11:55:58,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2023-08-30 11:55:59,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-08-30 11:55:59,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 1149 transitions, 26660 flow. Second operand has 22 states, 22 states have (on average 114.5909090909091) internal successors, (2521), 22 states have internal predecessors, (2521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:55:59,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:55:59,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-08-30 11:55:59,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:56:02,343 INFO L130 PetriNetUnfolder]: 3715/6861 cut-off events. [2023-08-30 11:56:02,343 INFO L131 PetriNetUnfolder]: For 132254/132254 co-relation queries the response was YES. [2023-08-30 11:56:02,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68365 conditions, 6861 events. 3715/6861 cut-off events. For 132254/132254 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 51534 event pairs, 299 based on Foata normal form. 32/6811 useless extension candidates. Maximal degree in co-relation 68235. Up to 4032 conditions per place. [2023-08-30 11:56:02,455 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 563 selfloop transitions, 816 changer transitions 2/1382 dead transitions. [2023-08-30 11:56:02,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 1382 transitions, 33218 flow [2023-08-30 11:56:02,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 11:56:02,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 11:56:02,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2985 transitions. [2023-08-30 11:56:02,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398 [2023-08-30 11:56:02,457 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2985 transitions. [2023-08-30 11:56:02,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2985 transitions. [2023-08-30 11:56:02,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:56:02,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2985 transitions. [2023-08-30 11:56:02,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 119.4) internal successors, (2985), 25 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:56:02,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 300.0) internal successors, (7800), 26 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:56:02,463 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 300.0) internal successors, (7800), 26 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:56:02,463 INFO L175 Difference]: Start difference. First operand has 515 places, 1149 transitions, 26660 flow. Second operand 25 states and 2985 transitions. [2023-08-30 11:56:02,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 1382 transitions, 33218 flow [2023-08-30 11:56:03,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 1382 transitions, 32937 flow, removed 35 selfloop flow, removed 19 redundant places. [2023-08-30 11:56:03,867 INFO L231 Difference]: Finished difference. Result has 521 places, 1312 transitions, 31383 flow [2023-08-30 11:56:03,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=26339, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=649, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=31383, PETRI_PLACES=521, PETRI_TRANSITIONS=1312} [2023-08-30 11:56:03,868 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 490 predicate places. [2023-08-30 11:56:03,868 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 1312 transitions, 31383 flow [2023-08-30 11:56:03,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 114.5909090909091) internal successors, (2521), 22 states have internal predecessors, (2521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:56:03,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:56:03,869 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:56:03,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-08-30 11:56:04,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-30 11:56:04,070 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:56:04,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:56:04,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1389472831, now seen corresponding path program 15 times [2023-08-30 11:56:04,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:56:04,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126992757] [2023-08-30 11:56:04,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:56:04,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:56:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:56:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:56:05,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:56:05,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126992757] [2023-08-30 11:56:05,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126992757] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:56:05,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901166100] [2023-08-30 11:56:05,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 11:56:05,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:56:05,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:56:05,093 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:56:05,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-30 11:56:05,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 11:56:05,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:56:05,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 11:56:05,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:56:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:56:05,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:56:05,839 INFO L321 Elim1Store]: treesize reduction 21, result has 75.3 percent of original size [2023-08-30 11:56:05,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 82 [2023-08-30 11:56:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 11:56:05,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901166100] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 11:56:05,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 11:56:05,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 25 [2023-08-30 11:56:05,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113051921] [2023-08-30 11:56:05,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 11:56:05,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 11:56:05,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 11:56:05,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 11:56:05,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-08-30 11:56:07,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-08-30 11:56:07,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 1312 transitions, 31383 flow. Second operand has 27 states, 27 states have (on average 114.33333333333333) internal successors, (3087), 27 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:56:07,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 11:56:07,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-08-30 11:56:07,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 11:56:13,928 INFO L130 PetriNetUnfolder]: 4661/8394 cut-off events. [2023-08-30 11:56:13,928 INFO L131 PetriNetUnfolder]: For 174329/174329 co-relation queries the response was YES. [2023-08-30 11:56:14,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86335 conditions, 8394 events. 4661/8394 cut-off events. For 174329/174329 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 63204 event pairs, 731 based on Foata normal form. 136/8280 useless extension candidates. Maximal degree in co-relation 86203. Up to 5268 conditions per place. [2023-08-30 11:56:14,066 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 937 selfloop transitions, 902 changer transitions 0/1840 dead transitions. [2023-08-30 11:56:14,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 1840 transitions, 44277 flow [2023-08-30 11:56:14,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-08-30 11:56:14,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-08-30 11:56:14,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 7942 transitions. [2023-08-30 11:56:14,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951243781094527 [2023-08-30 11:56:14,070 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 7942 transitions. [2023-08-30 11:56:14,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 7942 transitions. [2023-08-30 11:56:14,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 11:56:14,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 7942 transitions. [2023-08-30 11:56:14,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 118.53731343283582) internal successors, (7942), 67 states have internal predecessors, (7942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:56:14,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 300.0) internal successors, (20400), 68 states have internal predecessors, (20400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:56:14,084 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 300.0) internal successors, (20400), 68 states have internal predecessors, (20400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:56:14,084 INFO L175 Difference]: Start difference. First operand has 521 places, 1312 transitions, 31383 flow. Second operand 67 states and 7942 transitions. [2023-08-30 11:56:14,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 1840 transitions, 44277 flow [2023-08-30 11:56:16,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 1840 transitions, 43306 flow, removed 351 selfloop flow, removed 11 redundant places. [2023-08-30 11:56:16,059 INFO L231 Difference]: Finished difference. Result has 609 places, 1641 transitions, 41102 flow [2023-08-30 11:56:16,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=30733, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=611, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=41102, PETRI_PLACES=609, PETRI_TRANSITIONS=1641} [2023-08-30 11:56:16,060 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 578 predicate places. [2023-08-30 11:56:16,060 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 1641 transitions, 41102 flow [2023-08-30 11:56:16,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 114.33333333333333) internal successors, (3087), 27 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 11:56:16,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 11:56:16,061 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 11:56:16,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-08-30 11:56:16,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:56:16,261 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-08-30 11:56:16,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 11:56:16,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1723805486, now seen corresponding path program 8 times [2023-08-30 11:56:16,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 11:56:16,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134506575] [2023-08-30 11:56:16,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 11:56:16,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 11:56:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 11:56:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:56:16,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 11:56:16,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134506575] [2023-08-30 11:56:16,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134506575] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 11:56:16,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097087782] [2023-08-30 11:56:16,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 11:56:16,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 11:56:16,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 11:56:16,637 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 11:56:16,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-30 11:56:16,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 11:56:16,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 11:56:16,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 66 conjunts are in the unsatisfiable core [2023-08-30 11:56:16,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 11:56:16,922 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 11:56:16,974 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 21 treesize of output 20 [2023-08-30 11:56:17,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:56:17,038 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 11:56:17,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 11:56:17,089 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 11:56:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 11:56:17,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 11:56:18,917 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 11:56:18,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 517 treesize of output 317 [2023-08-30 11:56:18,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 574 treesize of output 547 [2023-08-30 11:56:19,120 INFO L321 Elim1Store]: treesize reduction 20, result has 83.2 percent of original size [2023-08-30 11:56:19,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1196 treesize of output 1186 [2023-08-30 11:56:19,250 INFO L321 Elim1Store]: treesize reduction 20, result has 73.3 percent of original size [2023-08-30 11:56:19,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 723 treesize of output 740 [2023-08-30 11:56:19,361 INFO L321 Elim1Store]: treesize reduction 20, result has 73.3 percent of original size [2023-08-30 11:56:19,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 685 treesize of output 664 [2023-08-30 11:56:19,460 INFO L321 Elim1Store]: treesize reduction 20, result has 73.3 percent of original size [2023-08-30 11:56:19,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 609 treesize of output 619 [2023-08-30 11:56:19,571 INFO L321 Elim1Store]: treesize reduction 20, result has 73.3 percent of original size [2023-08-30 11:56:19,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 564 treesize of output 529 [2023-08-30 11:56:19,737 INFO L321 Elim1Store]: treesize reduction 20, result has 83.2 percent of original size [2023-08-30 11:56:19,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 560 treesize of output 577 Killed by 15