./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 BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-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 BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 08:20:19,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 08:20:19,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 08:20:19,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 08:20:19,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 08:20:19,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 08:20:19,519 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 08:20:19,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 08:20:19,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 08:20:19,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 08:20:19,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 08:20:19,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 08:20:19,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 08:20:19,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 08:20:19,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 08:20:19,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 08:20:19,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 08:20:19,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 08:20:19,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 08:20:19,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 08:20:19,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 08:20:19,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 08:20:19,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 08:20:19,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 08:20:19,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 08:20:19,560 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 08:20:19,560 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 08:20:19,562 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 08:20:19,563 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 08:20:19,564 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 08:20:19,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 08:20:19,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 08:20:19,571 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 08:20:19,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 08:20:19,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 08:20:19,573 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 08:20:19,574 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 08:20:19,574 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 08:20:19,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 08:20:19,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 08:20:19,576 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 08:20:19,577 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 08:20:19,607 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 08:20:19,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 08:20:19,609 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 08:20:19,609 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 08:20:19,610 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 08:20:19,610 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 08:20:19,611 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 08:20:19,611 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 08:20:19,611 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 08:20:19,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 08:20:19,612 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 08:20:19,613 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 08:20:19,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 08:20:19,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 08:20:19,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 08:20:19,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 08:20:19,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 08:20:19,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 08:20:19,614 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 08:20:19,614 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 08:20:19,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 08:20:19,615 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 08:20:19,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 08:20:19,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 08:20:19,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 08:20:19,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 08:20:19,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:20:19,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 08:20:19,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 08:20:19,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 08:20:19,617 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 08:20:19,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 08:20:19,617 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 08:20:19,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 08:20:19,618 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 08:20:19,618 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 08:20:19,618 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 08:20:19,618 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 08:20:19,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 08:20:19,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 08:20:19,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 08:20:19,964 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 08:20:19,966 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 08:20:19,968 INFO L432 ainManager$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 [2023-09-01 08:20:21,215 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 08:20:21,420 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 08:20:21,420 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-09-01 08:20:21,429 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/804a7d61a/fc415e7b0baf46d68730e8dd380765ff/FLAGbae435d45 [2023-09-01 08:20:21,441 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/804a7d61a/fc415e7b0baf46d68730e8dd380765ff [2023-09-01 08:20:21,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 08:20:21,444 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 08:20:21,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 08:20:21,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 08:20:21,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 08:20:21,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:20:21" (1/1) ... [2023-09-01 08:20:21,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47153642 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:20:21, skipping insertion in model container [2023-09-01 08:20:21,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:20:21" (1/1) ... [2023-09-01 08:20:21,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 08:20:21,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 08:20:21,686 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] [2023-09-01 08:20:21,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:20:21,708 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 08:20:21,747 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] [2023-09-01 08:20:21,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:20:21,766 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:20:21,768 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:20:21,774 INFO L208 MainTranslator]: Completed translation [2023-09-01 08:20:21,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:20:21 WrapperNode [2023-09-01 08:20:21,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 08:20:21,776 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 08:20:21,776 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 08:20:21,777 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 08:20:21,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:20:21" (1/1) ... [2023-09-01 08:20:21,802 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:20:21" (1/1) ... [2023-09-01 08:20:21,836 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 180 [2023-09-01 08:20:21,837 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 08:20:21,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 08:20:21,838 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 08:20:21,838 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 08:20:21,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:20:21" (1/1) ... [2023-09-01 08:20:21,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:20:21" (1/1) ... [2023-09-01 08:20:21,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:20:21" (1/1) ... [2023-09-01 08:20:21,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:20:21" (1/1) ... [2023-09-01 08:20:21,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:20:21" (1/1) ... [2023-09-01 08:20:21,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:20:21" (1/1) ... [2023-09-01 08:20:21,884 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:20:21" (1/1) ... [2023-09-01 08:20:21,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:20:21" (1/1) ... [2023-09-01 08:20:21,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 08:20:21,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 08:20:21,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 08:20:21,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 08:20:21,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:20:21" (1/1) ... [2023-09-01 08:20:21,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:20:21,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:20:21,922 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 08:20:21,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 08:20:21,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 08:20:21,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 08:20:21,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 08:20:21,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 08:20:21,962 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 08:20:21,962 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 08:20:21,962 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 08:20:21,962 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 08:20:21,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 08:20:21,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 08:20:21,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 08:20:21,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 08:20:21,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 08:20:21,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 08:20:21,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 08:20:21,964 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 08:20:22,081 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 08:20:22,082 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 08:20:22,402 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 08:20:22,529 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 08:20:22,535 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 08:20:22,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:20:22 BoogieIcfgContainer [2023-09-01 08:20:22,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 08:20:22,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 08:20:22,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 08:20:22,545 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 08:20:22,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 08:20:21" (1/3) ... [2023-09-01 08:20:22,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@125c40d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:20:22, skipping insertion in model container [2023-09-01 08:20:22,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:20:21" (2/3) ... [2023-09-01 08:20:22,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@125c40d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:20:22, skipping insertion in model container [2023-09-01 08:20:22,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:20:22" (3/3) ... [2023-09-01 08:20:22,548 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2023-09-01 08:20:22,555 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 08:20:22,569 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 08:20:22,570 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-09-01 08:20:22,570 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 08:20:22,651 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 08:20:22,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 154 transitions, 324 flow [2023-09-01 08:20:22,786 INFO L130 PetriNetUnfolder]: 11/152 cut-off events. [2023-09-01 08:20:22,786 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 08:20:22,791 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. [2023-09-01 08:20:22,791 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 154 transitions, 324 flow [2023-09-01 08:20:22,795 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 136 transitions, 281 flow [2023-09-01 08:20:22,799 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 08:20:22,807 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 136 transitions, 281 flow [2023-09-01 08:20:22,810 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 136 transitions, 281 flow [2023-09-01 08:20:22,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 136 transitions, 281 flow [2023-09-01 08:20:22,840 INFO L130 PetriNetUnfolder]: 10/136 cut-off events. [2023-09-01 08:20:22,841 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 08:20:22,841 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. [2023-09-01 08:20:22,843 INFO L119 LiptonReduction]: Number of co-enabled transitions 1350 [2023-09-01 08:20:28,489 INFO L134 LiptonReduction]: Checked pairs total: 1701 [2023-09-01 08:20:28,489 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-09-01 08:20:28,508 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 08:20:28,515 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;@35de8897, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 08:20:28,516 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-09-01 08:20:28,519 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 08:20:28,519 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 08:20:28,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:28,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 08:20:28,520 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:20:28,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:28,525 INFO L85 PathProgramCache]: Analyzing trace with hash 22502, now seen corresponding path program 1 times [2023-09-01 08:20:28,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:28,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890474957] [2023-09-01 08:20:28,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:28,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:28,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:20:28,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890474957] [2023-09-01 08:20:28,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890474957] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:20:28,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:20:28,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:20:28,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579318097] [2023-09-01 08:20:28,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:20:28,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:20:28,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:20:28,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:20:28,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:20:28,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 300 [2023-09-01 08:20:28,878 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) [2023-09-01 08:20:28,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:20:28,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 300 [2023-09-01 08:20:28,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:20:29,060 INFO L130 PetriNetUnfolder]: 435/661 cut-off events. [2023-09-01 08:20:29,060 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 08:20:29,062 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. [2023-09-01 08:20:29,067 INFO L137 encePairwiseOnDemand]: 293/300 looper letters, 41 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-09-01 08:20:29,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 44 transitions, 192 flow [2023-09-01 08:20:29,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:20:29,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:20:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 438 transitions. [2023-09-01 08:20:29,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2023-09-01 08:20:29,082 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 438 transitions. [2023-09-01 08:20:29,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 438 transitions. [2023-09-01 08:20:29,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:20:29,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 438 transitions. [2023-09-01 08:20:29,089 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) [2023-09-01 08:20:29,094 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) [2023-09-01 08:20:29,094 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) [2023-09-01 08:20:29,096 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 63 flow. Second operand 3 states and 438 transitions. [2023-09-01 08:20:29,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 44 transitions, 192 flow [2023-09-01 08:20:29,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 44 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 08:20:29,102 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 66 flow [2023-09-01 08:20:29,112 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} [2023-09-01 08:20:29,115 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2023-09-01 08:20:29,116 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 66 flow [2023-09-01 08:20:29,116 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) [2023-09-01 08:20:29,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:29,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 08:20:29,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 08:20:29,117 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:20:29,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:29,118 INFO L85 PathProgramCache]: Analyzing trace with hash 698752, now seen corresponding path program 1 times [2023-09-01 08:20:29,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:29,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73995016] [2023-09-01 08:20:29,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:29,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:29,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:20:29,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73995016] [2023-09-01 08:20:29,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73995016] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:20:29,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948797126] [2023-09-01 08:20:29,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:29,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:20:29,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:20:29,192 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:20:29,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 08:20:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:29,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:20:29,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:20:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:29,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:20:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:29,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948797126] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:20:29,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:20:29,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-09-01 08:20:29,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795641352] [2023-09-01 08:20:29,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:20:29,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:20:29,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:20:29,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:20:29,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 08:20:29,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 300 [2023-09-01 08:20:29,392 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) [2023-09-01 08:20:29,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:20:29,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 300 [2023-09-01 08:20:29,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:20:29,747 INFO L130 PetriNetUnfolder]: 1089/1651 cut-off events. [2023-09-01 08:20:29,747 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 08:20:29,751 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. [2023-09-01 08:20:29,760 INFO L137 encePairwiseOnDemand]: 296/300 looper letters, 97 selfloop transitions, 9 changer transitions 0/107 dead transitions. [2023-09-01 08:20:29,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 107 transitions, 470 flow [2023-09-01 08:20:29,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 08:20:29,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 08:20:29,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1012 transitions. [2023-09-01 08:20:29,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4819047619047619 [2023-09-01 08:20:29,766 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1012 transitions. [2023-09-01 08:20:29,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1012 transitions. [2023-09-01 08:20:29,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:20:29,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1012 transitions. [2023-09-01 08:20:29,770 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) [2023-09-01 08:20:29,775 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) [2023-09-01 08:20:29,776 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) [2023-09-01 08:20:29,776 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 66 flow. Second operand 7 states and 1012 transitions. [2023-09-01 08:20:29,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 107 transitions, 470 flow [2023-09-01 08:20:29,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 107 transitions, 468 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:20:29,780 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 123 flow [2023-09-01 08:20:29,780 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} [2023-09-01 08:20:29,781 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2023-09-01 08:20:29,781 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 123 flow [2023-09-01 08:20:29,782 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) [2023-09-01 08:20:29,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:29,782 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-09-01 08:20:29,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 08:20:29,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:20:29,989 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:20:29,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:29,989 INFO L85 PathProgramCache]: Analyzing trace with hash 21661990, now seen corresponding path program 1 times [2023-09-01 08:20:29,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:29,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256844335] [2023-09-01 08:20:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:29,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:30,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:30,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:20:30,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256844335] [2023-09-01 08:20:30,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256844335] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:20:30,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041296630] [2023-09-01 08:20:30,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:30,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:20:30,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:20:30,089 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:20:30,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 08:20:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:30,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 08:20:30,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:20:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:30,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:20:30,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041296630] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:20:30,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:20:30,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-09-01 08:20:30,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993630574] [2023-09-01 08:20:30,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:20:30,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 08:20:30,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:20:30,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 08:20:30,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 08:20:30,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 300 [2023-09-01 08:20:30,186 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) [2023-09-01 08:20:30,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:20:30,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 300 [2023-09-01 08:20:30,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:20:30,462 INFO L130 PetriNetUnfolder]: 1086/1647 cut-off events. [2023-09-01 08:20:30,462 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-09-01 08:20:30,464 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. [2023-09-01 08:20:30,471 INFO L137 encePairwiseOnDemand]: 297/300 looper letters, 61 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2023-09-01 08:20:30,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 65 transitions, 308 flow [2023-09-01 08:20:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 08:20:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 08:20:30,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 709 transitions. [2023-09-01 08:20:30,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4726666666666667 [2023-09-01 08:20:30,474 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 709 transitions. [2023-09-01 08:20:30,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 709 transitions. [2023-09-01 08:20:30,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:20:30,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 709 transitions. [2023-09-01 08:20:30,476 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) [2023-09-01 08:20:30,479 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) [2023-09-01 08:20:30,480 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) [2023-09-01 08:20:30,480 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 123 flow. Second operand 5 states and 709 transitions. [2023-09-01 08:20:30,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 65 transitions, 308 flow [2023-09-01 08:20:30,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 65 transitions, 300 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 08:20:30,484 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 94 flow [2023-09-01 08:20:30,484 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} [2023-09-01 08:20:30,485 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-09-01 08:20:30,487 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 94 flow [2023-09-01 08:20:30,488 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) [2023-09-01 08:20:30,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:30,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 08:20:30,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 08:20:30,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-09-01 08:20:30,697 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:20:30,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:30,697 INFO L85 PathProgramCache]: Analyzing trace with hash 671623000, now seen corresponding path program 1 times [2023-09-01 08:20:30,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:30,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083225461] [2023-09-01 08:20:30,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:30,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:30,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:20:30,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083225461] [2023-09-01 08:20:30,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083225461] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:20:30,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:20:30,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:20:30,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21328941] [2023-09-01 08:20:30,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:20:30,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:20:30,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:20:30,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:20:30,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:20:30,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 300 [2023-09-01 08:20:30,747 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) [2023-09-01 08:20:30,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:20:30,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 300 [2023-09-01 08:20:30,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:20:30,980 INFO L130 PetriNetUnfolder]: 1226/2127 cut-off events. [2023-09-01 08:20:30,980 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 08:20:30,983 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. [2023-09-01 08:20:30,992 INFO L137 encePairwiseOnDemand]: 296/300 looper letters, 40 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-09-01 08:20:30,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 42 transitions, 211 flow [2023-09-01 08:20:30,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:20:30,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:20:30,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 430 transitions. [2023-09-01 08:20:30,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2023-09-01 08:20:30,995 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 430 transitions. [2023-09-01 08:20:30,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 430 transitions. [2023-09-01 08:20:30,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:20:30,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 430 transitions. [2023-09-01 08:20:30,996 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) [2023-09-01 08:20:30,998 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) [2023-09-01 08:20:30,999 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) [2023-09-01 08:20:30,999 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 94 flow. Second operand 3 states and 430 transitions. [2023-09-01 08:20:30,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 42 transitions, 211 flow [2023-09-01 08:20:31,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 206 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 08:20:31,001 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 103 flow [2023-09-01 08:20:31,001 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} [2023-09-01 08:20:31,002 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-09-01 08:20:31,002 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 103 flow [2023-09-01 08:20:31,002 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) [2023-09-01 08:20:31,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:31,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 08:20:31,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 08:20:31,003 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:20:31,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:31,003 INFO L85 PathProgramCache]: Analyzing trace with hash 671622890, now seen corresponding path program 1 times [2023-09-01 08:20:31,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:31,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727099418] [2023-09-01 08:20:31,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:31,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:31,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:20:31,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727099418] [2023-09-01 08:20:31,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727099418] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:20:31,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:20:31,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:20:31,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629874797] [2023-09-01 08:20:31,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:20:31,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:20:31,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:20:31,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:20:31,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 08:20:31,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 300 [2023-09-01 08:20:31,103 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) [2023-09-01 08:20:31,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:20:31,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 300 [2023-09-01 08:20:31,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:20:31,321 INFO L130 PetriNetUnfolder]: 902/1580 cut-off events. [2023-09-01 08:20:31,322 INFO L131 PetriNetUnfolder]: For 149/206 co-relation queries the response was YES. [2023-09-01 08:20:31,324 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. [2023-09-01 08:20:31,331 INFO L137 encePairwiseOnDemand]: 288/300 looper letters, 25 selfloop transitions, 2 changer transitions 6/34 dead transitions. [2023-09-01 08:20:31,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 184 flow [2023-09-01 08:20:31,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:20:31,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:20:31,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 542 transitions. [2023-09-01 08:20:31,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45166666666666666 [2023-09-01 08:20:31,334 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 542 transitions. [2023-09-01 08:20:31,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 542 transitions. [2023-09-01 08:20:31,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:20:31,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 542 transitions. [2023-09-01 08:20:31,336 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) [2023-09-01 08:20:31,338 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) [2023-09-01 08:20:31,339 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) [2023-09-01 08:20:31,339 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 103 flow. Second operand 4 states and 542 transitions. [2023-09-01 08:20:31,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 184 flow [2023-09-01 08:20:31,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 34 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:20:31,341 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 127 flow [2023-09-01 08:20:31,341 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} [2023-09-01 08:20:31,342 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2023-09-01 08:20:31,342 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 127 flow [2023-09-01 08:20:31,343 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) [2023-09-01 08:20:31,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:31,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 08:20:31,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 08:20:31,343 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:20:31,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:31,344 INFO L85 PathProgramCache]: Analyzing trace with hash -657526496, now seen corresponding path program 1 times [2023-09-01 08:20:31,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:31,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540106604] [2023-09-01 08:20:31,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:31,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:31,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:20:31,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540106604] [2023-09-01 08:20:31,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540106604] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:20:31,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354072897] [2023-09-01 08:20:31,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:31,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:20:31,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:20:31,428 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:20:31,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 08:20:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:31,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:20:31,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:20:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:20:31,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:20:31,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354072897] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:20:31,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:20:31,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-09-01 08:20:31,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083596762] [2023-09-01 08:20:31,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:20:31,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:20:31,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:20:31,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:20:31,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-09-01 08:20:31,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 300 [2023-09-01 08:20:31,525 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) [2023-09-01 08:20:31,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:20:31,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 300 [2023-09-01 08:20:31,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:20:31,638 INFO L130 PetriNetUnfolder]: 493/875 cut-off events. [2023-09-01 08:20:31,638 INFO L131 PetriNetUnfolder]: For 243/287 co-relation queries the response was YES. [2023-09-01 08:20:31,640 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. [2023-09-01 08:20:31,644 INFO L137 encePairwiseOnDemand]: 296/300 looper letters, 23 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-09-01 08:20:31,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 25 transitions, 163 flow [2023-09-01 08:20:31,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:20:31,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:20:31,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 412 transitions. [2023-09-01 08:20:31,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577777777777778 [2023-09-01 08:20:31,646 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 412 transitions. [2023-09-01 08:20:31,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 412 transitions. [2023-09-01 08:20:31,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:20:31,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 412 transitions. [2023-09-01 08:20:31,648 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) [2023-09-01 08:20:31,650 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) [2023-09-01 08:20:31,650 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) [2023-09-01 08:20:31,650 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 127 flow. Second operand 3 states and 412 transitions. [2023-09-01 08:20:31,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 25 transitions, 163 flow [2023-09-01 08:20:31,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 25 transitions, 157 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 08:20:31,652 INFO L231 Difference]: Finished difference. Result has 37 places, 25 transitions, 111 flow [2023-09-01 08:20:31,652 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} [2023-09-01 08:20:31,653 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-09-01 08:20:31,653 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 111 flow [2023-09-01 08:20:31,653 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) [2023-09-01 08:20:31,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:31,654 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 08:20:31,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 08:20:31,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:20:31,860 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:20:31,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:31,860 INFO L85 PathProgramCache]: Analyzing trace with hash -657626506, now seen corresponding path program 2 times [2023-09-01 08:20:31,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:31,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262211842] [2023-09-01 08:20:31,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:31,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:31,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:20:31,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262211842] [2023-09-01 08:20:31,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262211842] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:20:31,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405908459] [2023-09-01 08:20:31,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:20:31,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:20:31,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:20:31,933 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:20:31,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 08:20:32,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:20:32,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:20:32,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 08:20:32,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:20:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:20:32,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:20:32,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405908459] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:20:32,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:20:32,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-09-01 08:20:32,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655688949] [2023-09-01 08:20:32,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:20:32,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:20:32,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:20:32,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:20:32,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 08:20:32,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 300 [2023-09-01 08:20:32,042 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) [2023-09-01 08:20:32,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:20:32,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 300 [2023-09-01 08:20:32,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:20:32,151 INFO L130 PetriNetUnfolder]: 493/874 cut-off events. [2023-09-01 08:20:32,152 INFO L131 PetriNetUnfolder]: For 244/288 co-relation queries the response was YES. [2023-09-01 08:20:32,153 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. [2023-09-01 08:20:32,157 INFO L137 encePairwiseOnDemand]: 298/300 looper letters, 22 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-09-01 08:20:32,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 24 transitions, 147 flow [2023-09-01 08:20:32,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:20:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:20:32,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 409 transitions. [2023-09-01 08:20:32,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45444444444444443 [2023-09-01 08:20:32,159 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 409 transitions. [2023-09-01 08:20:32,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 409 transitions. [2023-09-01 08:20:32,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:20:32,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 409 transitions. [2023-09-01 08:20:32,161 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) [2023-09-01 08:20:32,162 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) [2023-09-01 08:20:32,163 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) [2023-09-01 08:20:32,163 INFO L175 Difference]: Start difference. First operand has 37 places, 25 transitions, 111 flow. Second operand 3 states and 409 transitions. [2023-09-01 08:20:32,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 24 transitions, 147 flow [2023-09-01 08:20:32,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 24 transitions, 136 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-09-01 08:20:32,164 INFO L231 Difference]: Finished difference. Result has 33 places, 24 transitions, 92 flow [2023-09-01 08:20:32,165 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} [2023-09-01 08:20:32,165 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2023-09-01 08:20:32,165 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 24 transitions, 92 flow [2023-09-01 08:20:32,166 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) [2023-09-01 08:20:32,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:32,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:20:32,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 08:20:32,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:20:32,372 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:20:32,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:32,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1091519694, now seen corresponding path program 1 times [2023-09-01 08:20:32,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:32,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422984587] [2023-09-01 08:20:32,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:32,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:20:32,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:20:32,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422984587] [2023-09-01 08:20:32,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422984587] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:20:32,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151226626] [2023-09-01 08:20:32,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:32,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:20:32,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:20:32,431 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:20:32,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 08:20:32,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:32,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:20:32,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:20:32,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:20:32,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:20:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:20:32,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151226626] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:20:32,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:20:32,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 08:20:32,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575587351] [2023-09-01 08:20:32,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:20:32,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:20:32,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:20:32,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:20:32,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 08:20:32,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 300 [2023-09-01 08:20:32,557 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) [2023-09-01 08:20:32,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:20:32,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 300 [2023-09-01 08:20:32,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:20:32,840 INFO L130 PetriNetUnfolder]: 1233/2066 cut-off events. [2023-09-01 08:20:32,841 INFO L131 PetriNetUnfolder]: For 196/196 co-relation queries the response was YES. [2023-09-01 08:20:32,843 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. [2023-09-01 08:20:32,851 INFO L137 encePairwiseOnDemand]: 296/300 looper letters, 73 selfloop transitions, 9 changer transitions 0/82 dead transitions. [2023-09-01 08:20:32,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 82 transitions, 446 flow [2023-09-01 08:20:32,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 08:20:32,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 08:20:32,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 991 transitions. [2023-09-01 08:20:32,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4719047619047619 [2023-09-01 08:20:32,854 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 991 transitions. [2023-09-01 08:20:32,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 991 transitions. [2023-09-01 08:20:32,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:20:32,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 991 transitions. [2023-09-01 08:20:32,857 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) [2023-09-01 08:20:32,860 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) [2023-09-01 08:20:32,860 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) [2023-09-01 08:20:32,860 INFO L175 Difference]: Start difference. First operand has 33 places, 24 transitions, 92 flow. Second operand 7 states and 991 transitions. [2023-09-01 08:20:32,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 82 transitions, 446 flow [2023-09-01 08:20:32,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 82 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:20:32,862 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 150 flow [2023-09-01 08:20:32,862 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} [2023-09-01 08:20:32,863 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2023-09-01 08:20:32,863 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 150 flow [2023-09-01 08:20:32,863 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) [2023-09-01 08:20:32,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:32,864 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 08:20:32,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 08:20:33,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:20:33,070 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:20:33,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:33,070 INFO L85 PathProgramCache]: Analyzing trace with hash -522626693, now seen corresponding path program 1 times [2023-09-01 08:20:33,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:33,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624600585] [2023-09-01 08:20:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:33,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 08:20:33,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:20:33,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624600585] [2023-09-01 08:20:33,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624600585] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:20:33,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:20:33,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:20:33,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413782353] [2023-09-01 08:20:33,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:20:33,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:20:33,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:20:33,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:20:33,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:20:33,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 300 [2023-09-01 08:20:33,141 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) [2023-09-01 08:20:33,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:20:33,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 300 [2023-09-01 08:20:33,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:20:33,341 INFO L130 PetriNetUnfolder]: 1021/1806 cut-off events. [2023-09-01 08:20:33,341 INFO L131 PetriNetUnfolder]: For 316/316 co-relation queries the response was YES. [2023-09-01 08:20:33,344 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. [2023-09-01 08:20:33,355 INFO L137 encePairwiseOnDemand]: 298/300 looper letters, 33 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-09-01 08:20:33,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 34 transitions, 217 flow [2023-09-01 08:20:33,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:20:33,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:20:33,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 417 transitions. [2023-09-01 08:20:33,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4633333333333333 [2023-09-01 08:20:33,358 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 417 transitions. [2023-09-01 08:20:33,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 417 transitions. [2023-09-01 08:20:33,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:20:33,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 417 transitions. [2023-09-01 08:20:33,360 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) [2023-09-01 08:20:33,361 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) [2023-09-01 08:20:33,362 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) [2023-09-01 08:20:33,362 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 150 flow. Second operand 3 states and 417 transitions. [2023-09-01 08:20:33,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 34 transitions, 217 flow [2023-09-01 08:20:33,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 209 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 08:20:33,367 INFO L231 Difference]: Finished difference. Result has 40 places, 26 transitions, 117 flow [2023-09-01 08:20:33,367 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} [2023-09-01 08:20:33,367 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 9 predicate places. [2023-09-01 08:20:33,368 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 26 transitions, 117 flow [2023-09-01 08:20:33,368 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) [2023-09-01 08:20:33,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:33,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:20:33,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 08:20:33,369 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:20:33,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:33,369 INFO L85 PathProgramCache]: Analyzing trace with hash -518182921, now seen corresponding path program 1 times [2023-09-01 08:20:33,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:33,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364749879] [2023-09-01 08:20:33,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:33,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:20:33,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:20:33,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364749879] [2023-09-01 08:20:33,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364749879] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:20:33,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:20:33,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:20:33,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159957946] [2023-09-01 08:20:33,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:20:33,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:20:33,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:20:33,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:20:33,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:20:33,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 300 [2023-09-01 08:20:33,430 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) [2023-09-01 08:20:33,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:20:33,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 300 [2023-09-01 08:20:33,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:20:33,618 INFO L130 PetriNetUnfolder]: 885/1602 cut-off events. [2023-09-01 08:20:33,619 INFO L131 PetriNetUnfolder]: For 1056/1096 co-relation queries the response was YES. [2023-09-01 08:20:33,621 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. [2023-09-01 08:20:33,627 INFO L137 encePairwiseOnDemand]: 293/300 looper letters, 27 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-09-01 08:20:33,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 31 transitions, 191 flow [2023-09-01 08:20:33,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:20:33,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:20:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 411 transitions. [2023-09-01 08:20:33,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45666666666666667 [2023-09-01 08:20:33,629 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 411 transitions. [2023-09-01 08:20:33,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 411 transitions. [2023-09-01 08:20:33,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:20:33,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 411 transitions. [2023-09-01 08:20:33,630 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) [2023-09-01 08:20:33,632 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) [2023-09-01 08:20:33,632 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) [2023-09-01 08:20:33,632 INFO L175 Difference]: Start difference. First operand has 40 places, 26 transitions, 117 flow. Second operand 3 states and 411 transitions. [2023-09-01 08:20:33,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 31 transitions, 191 flow [2023-09-01 08:20:33,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 31 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:20:33,635 INFO L231 Difference]: Finished difference. Result has 42 places, 27 transitions, 139 flow [2023-09-01 08:20:33,635 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} [2023-09-01 08:20:33,635 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 11 predicate places. [2023-09-01 08:20:33,636 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 27 transitions, 139 flow [2023-09-01 08:20:33,636 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) [2023-09-01 08:20:33,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:33,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:20:33,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 08:20:33,637 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:20:33,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:33,637 INFO L85 PathProgramCache]: Analyzing trace with hash 232958398, now seen corresponding path program 1 times [2023-09-01 08:20:33,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:33,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813068194] [2023-09-01 08:20:33,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:33,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:33,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:20:33,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813068194] [2023-09-01 08:20:33,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813068194] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:20:33,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644444679] [2023-09-01 08:20:33,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:33,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:20:33,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:20:33,953 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:20:33,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 08:20:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:34,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 08:20:34,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:20:34,122 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 15 treesize of output 11 [2023-09-01 08:20:34,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:20:34,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:20:34,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:20:34,293 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 18 treesize of output 20 [2023-09-01 08:20:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:34,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:20:34,633 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:20:34,634 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 [2023-09-01 08:20:34,644 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:20:34,645 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 [2023-09-01 08:20:34,655 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 [2023-09-01 08:20:34,666 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 [2023-09-01 08:20:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:34,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644444679] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:20:34,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:20:34,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2023-09-01 08:20:34,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702531681] [2023-09-01 08:20:34,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:20:34,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 08:20:34,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:20:34,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 08:20:34,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=284, Unknown=1, NotChecked=0, Total=342 [2023-09-01 08:20:35,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 300 [2023-09-01 08:20:35,697 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) [2023-09-01 08:20:35,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:20:35,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 300 [2023-09-01 08:20:35,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:20:37,702 INFO L130 PetriNetUnfolder]: 1508/2649 cut-off events. [2023-09-01 08:20:37,703 INFO L131 PetriNetUnfolder]: For 2105/2143 co-relation queries the response was YES. [2023-09-01 08:20:37,709 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. [2023-09-01 08:20:37,725 INFO L137 encePairwiseOnDemand]: 288/300 looper letters, 105 selfloop transitions, 58 changer transitions 7/171 dead transitions. [2023-09-01 08:20:37,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 171 transitions, 1182 flow [2023-09-01 08:20:37,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 08:20:37,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 08:20:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2272 transitions. [2023-09-01 08:20:37,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37866666666666665 [2023-09-01 08:20:37,733 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2272 transitions. [2023-09-01 08:20:37,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2272 transitions. [2023-09-01 08:20:37,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:20:37,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2272 transitions. [2023-09-01 08:20:37,741 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) [2023-09-01 08:20:37,749 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) [2023-09-01 08:20:37,750 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) [2023-09-01 08:20:37,751 INFO L175 Difference]: Start difference. First operand has 42 places, 27 transitions, 139 flow. Second operand 20 states and 2272 transitions. [2023-09-01 08:20:37,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 171 transitions, 1182 flow [2023-09-01 08:20:37,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 171 transitions, 1059 flow, removed 56 selfloop flow, removed 2 redundant places. [2023-09-01 08:20:37,760 INFO L231 Difference]: Finished difference. Result has 72 places, 89 transitions, 691 flow [2023-09-01 08:20:37,760 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} [2023-09-01 08:20:37,760 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2023-09-01 08:20:37,761 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 89 transitions, 691 flow [2023-09-01 08:20:37,761 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) [2023-09-01 08:20:37,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:37,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:20:37,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 08:20:37,968 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 [2023-09-01 08:20:37,969 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:20:37,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:37,969 INFO L85 PathProgramCache]: Analyzing trace with hash 232959182, now seen corresponding path program 1 times [2023-09-01 08:20:37,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:37,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790910963] [2023-09-01 08:20:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:37,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:38,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:20:38,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790910963] [2023-09-01 08:20:38,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790910963] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:20:38,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630572717] [2023-09-01 08:20:38,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:38,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:20:38,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:20:38,417 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:20:38,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 08:20:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:38,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 08:20:38,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:20:38,564 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 15 treesize of output 11 [2023-09-01 08:20:38,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:20:38,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 08:20:38,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:20:38,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 08:20:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:38,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:20:38,998 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:20:38,999 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 [2023-09-01 08:20:39,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:20:39,009 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 [2023-09-01 08:20:39,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-09-01 08:20:39,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2023-09-01 08:20:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:39,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630572717] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:20:39,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:20:39,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2023-09-01 08:20:39,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360186219] [2023-09-01 08:20:39,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:20:39,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 08:20:39,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:20:39,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 08:20:39,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=285, Unknown=1, NotChecked=0, Total=342 [2023-09-01 08:20:39,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-09-01 08:20:39,536 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) [2023-09-01 08:20:39,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:20:39,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-09-01 08:20:39,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:20:42,036 INFO L130 PetriNetUnfolder]: 1658/3013 cut-off events. [2023-09-01 08:20:42,036 INFO L131 PetriNetUnfolder]: For 13213/13255 co-relation queries the response was YES. [2023-09-01 08:20:42,044 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. [2023-09-01 08:20:42,056 INFO L137 encePairwiseOnDemand]: 288/300 looper letters, 141 selfloop transitions, 76 changer transitions 4/222 dead transitions. [2023-09-01 08:20:42,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 222 transitions, 2107 flow [2023-09-01 08:20:42,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 08:20:42,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 08:20:42,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2405 transitions. [2023-09-01 08:20:42,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32066666666666666 [2023-09-01 08:20:42,065 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2405 transitions. [2023-09-01 08:20:42,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2405 transitions. [2023-09-01 08:20:42,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:20:42,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2405 transitions. [2023-09-01 08:20:42,072 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) [2023-09-01 08:20:42,083 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) [2023-09-01 08:20:42,085 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) [2023-09-01 08:20:42,085 INFO L175 Difference]: Start difference. First operand has 72 places, 89 transitions, 691 flow. Second operand 25 states and 2405 transitions. [2023-09-01 08:20:42,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 222 transitions, 2107 flow [2023-09-01 08:20:42,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 222 transitions, 2065 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-09-01 08:20:42,142 INFO L231 Difference]: Finished difference. Result has 94 places, 114 transitions, 1139 flow [2023-09-01 08:20:42,142 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} [2023-09-01 08:20:42,144 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 63 predicate places. [2023-09-01 08:20:42,144 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 114 transitions, 1139 flow [2023-09-01 08:20:42,146 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) [2023-09-01 08:20:42,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:42,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:20:42,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-09-01 08:20:42,352 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 [2023-09-01 08:20:42,353 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:20:42,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:42,353 INFO L85 PathProgramCache]: Analyzing trace with hash 240945185, now seen corresponding path program 1 times [2023-09-01 08:20:42,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:42,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455365531] [2023-09-01 08:20:42,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:42,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:42,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:20:42,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455365531] [2023-09-01 08:20:42,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455365531] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:20:42,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976843194] [2023-09-01 08:20:42,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:42,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:20:42,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:20:42,797 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:20:42,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 08:20:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:42,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjunts are in the unsatisfiable core [2023-09-01 08:20:42,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:20:42,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 08:20:43,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:20:43,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 08:20:43,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:20:43,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 08:20:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:43,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:20:43,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:20:43,366 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 [2023-09-01 08:20:43,376 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:20:43,376 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 [2023-09-01 08:20:43,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2023-09-01 08:20:43,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-09-01 08:20:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:43,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976843194] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:20:43,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:20:43,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-09-01 08:20:43,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932426218] [2023-09-01 08:20:43,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:20:43,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 08:20:43,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:20:43,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 08:20:43,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=307, Unknown=9, NotChecked=0, Total=380 [2023-09-01 08:20:44,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-09-01 08:20:44,295 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) [2023-09-01 08:20:44,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:20:44,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-09-01 08:20:44,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:20:46,160 INFO L130 PetriNetUnfolder]: 1786/3161 cut-off events. [2023-09-01 08:20:46,161 INFO L131 PetriNetUnfolder]: For 18182/18224 co-relation queries the response was YES. [2023-09-01 08:20:46,169 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. [2023-09-01 08:20:46,183 INFO L137 encePairwiseOnDemand]: 289/300 looper letters, 136 selfloop transitions, 55 changer transitions 35/227 dead transitions. [2023-09-01 08:20:46,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 227 transitions, 2490 flow [2023-09-01 08:20:46,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 08:20:46,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 08:20:46,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2188 transitions. [2023-09-01 08:20:46,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3171014492753623 [2023-09-01 08:20:46,192 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2188 transitions. [2023-09-01 08:20:46,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2188 transitions. [2023-09-01 08:20:46,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:20:46,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2188 transitions. [2023-09-01 08:20:46,210 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) [2023-09-01 08:20:46,219 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) [2023-09-01 08:20:46,220 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) [2023-09-01 08:20:46,220 INFO L175 Difference]: Start difference. First operand has 94 places, 114 transitions, 1139 flow. Second operand 23 states and 2188 transitions. [2023-09-01 08:20:46,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 227 transitions, 2490 flow [2023-09-01 08:20:46,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 227 transitions, 2302 flow, removed 52 selfloop flow, removed 11 redundant places. [2023-09-01 08:20:46,341 INFO L231 Difference]: Finished difference. Result has 109 places, 124 transitions, 1240 flow [2023-09-01 08:20:46,342 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} [2023-09-01 08:20:46,342 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 78 predicate places. [2023-09-01 08:20:46,342 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 124 transitions, 1240 flow [2023-09-01 08:20:46,343 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) [2023-09-01 08:20:46,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:46,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:20:46,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 08:20:46,549 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 [2023-09-01 08:20:46,550 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:20:46,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:46,550 INFO L85 PathProgramCache]: Analyzing trace with hash 265880305, now seen corresponding path program 1 times [2023-09-01 08:20:46,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:46,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287233648] [2023-09-01 08:20:46,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:46,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:46,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:20:46,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287233648] [2023-09-01 08:20:46,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287233648] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:20:46,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161584676] [2023-09-01 08:20:46,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:46,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:20:46,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:20:46,936 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:20:46,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 08:20:47,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:47,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2023-09-01 08:20:47,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:20:47,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:20:47,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:20:47,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 08:20:47,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:20:47,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 08:20:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:47,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:20:47,291 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 [2023-09-01 08:20:47,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:20:47,383 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 [2023-09-01 08:20:47,391 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:20:47,392 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 [2023-09-01 08:20:47,404 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 [2023-09-01 08:20:47,433 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 [2023-09-01 08:20:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:47,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161584676] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:20:47,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:20:47,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-09-01 08:20:47,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727450628] [2023-09-01 08:20:47,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:20:47,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 08:20:47,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:20:47,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 08:20:47,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=283, Unknown=1, NotChecked=34, Total=380 [2023-09-01 08:20:47,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-09-01 08:20:47,471 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) [2023-09-01 08:20:47,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:20:47,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-09-01 08:20:47,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:20:48,962 INFO L130 PetriNetUnfolder]: 1608/2879 cut-off events. [2023-09-01 08:20:48,962 INFO L131 PetriNetUnfolder]: For 20044/20084 co-relation queries the response was YES. [2023-09-01 08:20:48,970 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. [2023-09-01 08:20:48,985 INFO L137 encePairwiseOnDemand]: 289/300 looper letters, 139 selfloop transitions, 43 changer transitions 0/183 dead transitions. [2023-09-01 08:20:48,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 183 transitions, 2097 flow [2023-09-01 08:20:48,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 08:20:48,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 08:20:48,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1704 transitions. [2023-09-01 08:20:48,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31555555555555553 [2023-09-01 08:20:48,989 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1704 transitions. [2023-09-01 08:20:48,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1704 transitions. [2023-09-01 08:20:48,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:20:48,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1704 transitions. [2023-09-01 08:20:48,992 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) [2023-09-01 08:20:48,998 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) [2023-09-01 08:20:48,999 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) [2023-09-01 08:20:48,999 INFO L175 Difference]: Start difference. First operand has 109 places, 124 transitions, 1240 flow. Second operand 18 states and 1704 transitions. [2023-09-01 08:20:48,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 183 transitions, 2097 flow [2023-09-01 08:20:49,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 183 transitions, 1996 flow, removed 26 selfloop flow, removed 11 redundant places. [2023-09-01 08:20:49,050 INFO L231 Difference]: Finished difference. Result has 111 places, 117 transitions, 1184 flow [2023-09-01 08:20:49,050 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} [2023-09-01 08:20:49,051 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2023-09-01 08:20:49,051 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 117 transitions, 1184 flow [2023-09-01 08:20:49,051 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) [2023-09-01 08:20:49,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:49,052 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:20:49,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 08:20:49,257 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 [2023-09-01 08:20:49,258 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:20:49,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:49,258 INFO L85 PathProgramCache]: Analyzing trace with hash -127291424, now seen corresponding path program 2 times [2023-09-01 08:20:49,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:49,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831560514] [2023-09-01 08:20:49,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:49,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:49,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:20:49,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831560514] [2023-09-01 08:20:49,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831560514] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:20:49,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277313677] [2023-09-01 08:20:49,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:20:49,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:20:49,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:20:49,819 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:20:49,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 08:20:49,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:20:49,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:20:49,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 08:20:49,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:20:49,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:20:49,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:20:50,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:20:50,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:20:50,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277313677] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:20:50,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:20:50,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-09-01 08:20:50,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776710275] [2023-09-01 08:20:50,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:20:50,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:20:50,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:20:50,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:20:50,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-09-01 08:20:50,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 300 [2023-09-01 08:20:50,080 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) [2023-09-01 08:20:50,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:20:50,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 300 [2023-09-01 08:20:50,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:20:50,446 INFO L130 PetriNetUnfolder]: 1582/2845 cut-off events. [2023-09-01 08:20:50,446 INFO L131 PetriNetUnfolder]: For 20219/20255 co-relation queries the response was YES. [2023-09-01 08:20:50,453 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. [2023-09-01 08:20:50,460 INFO L137 encePairwiseOnDemand]: 292/300 looper letters, 118 selfloop transitions, 14 changer transitions 9/142 dead transitions. [2023-09-01 08:20:50,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 142 transitions, 1629 flow [2023-09-01 08:20:50,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 08:20:50,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 08:20:50,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 615 transitions. [2023-09-01 08:20:50,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2023-09-01 08:20:50,463 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 615 transitions. [2023-09-01 08:20:50,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 615 transitions. [2023-09-01 08:20:50,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:20:50,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 615 transitions. [2023-09-01 08:20:50,464 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) [2023-09-01 08:20:50,466 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) [2023-09-01 08:20:50,466 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) [2023-09-01 08:20:50,466 INFO L175 Difference]: Start difference. First operand has 111 places, 117 transitions, 1184 flow. Second operand 5 states and 615 transitions. [2023-09-01 08:20:50,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 142 transitions, 1629 flow [2023-09-01 08:20:50,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 142 transitions, 1533 flow, removed 11 selfloop flow, removed 13 redundant places. [2023-09-01 08:20:50,515 INFO L231 Difference]: Finished difference. Result has 104 places, 120 transitions, 1196 flow [2023-09-01 08:20:50,516 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} [2023-09-01 08:20:50,516 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 73 predicate places. [2023-09-01 08:20:50,516 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 120 transitions, 1196 flow [2023-09-01 08:20:50,516 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) [2023-09-01 08:20:50,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:50,517 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-09-01 08:20:50,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 08:20:50,722 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 [2023-09-01 08:20:50,723 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:20:50,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:50,723 INFO L85 PathProgramCache]: Analyzing trace with hash 266977678, now seen corresponding path program 2 times [2023-09-01 08:20:50,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:50,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117637965] [2023-09-01 08:20:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:50,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:20:50,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:20:50,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117637965] [2023-09-01 08:20:50,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117637965] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:20:50,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485308666] [2023-09-01 08:20:50,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:20:50,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:20:50,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:20:50,792 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:20:50,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 08:20:50,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:20:50,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:20:50,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:20:50,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:20:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 08:20:50,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:20:50,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485308666] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:20:50,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:20:50,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-09-01 08:20:50,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297321111] [2023-09-01 08:20:50,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:20:50,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:20:50,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:20:50,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:20:50,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 08:20:50,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 300 [2023-09-01 08:20:50,894 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) [2023-09-01 08:20:50,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:20:50,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 300 [2023-09-01 08:20:50,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:20:51,253 INFO L130 PetriNetUnfolder]: 1412/2549 cut-off events. [2023-09-01 08:20:51,253 INFO L131 PetriNetUnfolder]: For 21701/21737 co-relation queries the response was YES. [2023-09-01 08:20:51,259 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. [2023-09-01 08:20:51,265 INFO L137 encePairwiseOnDemand]: 298/300 looper letters, 104 selfloop transitions, 1 changer transitions 7/113 dead transitions. [2023-09-01 08:20:51,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 113 transitions, 1312 flow [2023-09-01 08:20:51,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:20:51,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:20:51,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2023-09-01 08:20:51,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45222222222222225 [2023-09-01 08:20:51,267 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2023-09-01 08:20:51,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2023-09-01 08:20:51,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:20:51,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2023-09-01 08:20:51,268 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) [2023-09-01 08:20:51,269 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) [2023-09-01 08:20:51,269 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) [2023-09-01 08:20:51,269 INFO L175 Difference]: Start difference. First operand has 104 places, 120 transitions, 1196 flow. Second operand 3 states and 407 transitions. [2023-09-01 08:20:51,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 113 transitions, 1312 flow [2023-09-01 08:20:51,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 113 transitions, 1205 flow, removed 22 selfloop flow, removed 5 redundant places. [2023-09-01 08:20:51,326 INFO L231 Difference]: Finished difference. Result has 99 places, 106 transitions, 909 flow [2023-09-01 08:20:51,327 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} [2023-09-01 08:20:51,327 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 68 predicate places. [2023-09-01 08:20:51,327 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 106 transitions, 909 flow [2023-09-01 08:20:51,327 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) [2023-09-01 08:20:51,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:51,328 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:20:51,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 08:20:51,529 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 [2023-09-01 08:20:51,530 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:20:51,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:51,530 INFO L85 PathProgramCache]: Analyzing trace with hash -127741973, now seen corresponding path program 2 times [2023-09-01 08:20:51,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:51,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378522067] [2023-09-01 08:20:51,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:51,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:52,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:20:52,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378522067] [2023-09-01 08:20:52,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378522067] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:20:52,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657540962] [2023-09-01 08:20:52,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:20:52,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:20:52,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:20:52,215 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:20:52,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 08:20:52,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:20:52,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:20:52,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 08:20:52,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:20:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:20:52,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:20:52,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657540962] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:20:52,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:20:52,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2023-09-01 08:20:52,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748883621] [2023-09-01 08:20:52,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:20:52,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 08:20:52,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:20:52,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 08:20:52,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-09-01 08:20:52,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 300 [2023-09-01 08:20:52,384 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) [2023-09-01 08:20:52,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:20:52,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 300 [2023-09-01 08:20:52,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:20:52,653 INFO L130 PetriNetUnfolder]: 1173/2210 cut-off events. [2023-09-01 08:20:52,654 INFO L131 PetriNetUnfolder]: For 16569/16588 co-relation queries the response was YES. [2023-09-01 08:20:52,660 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. [2023-09-01 08:20:52,668 INFO L137 encePairwiseOnDemand]: 293/300 looper letters, 101 selfloop transitions, 11 changer transitions 6/119 dead transitions. [2023-09-01 08:20:52,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 119 transitions, 1199 flow [2023-09-01 08:20:52,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 08:20:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 08:20:52,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 633 transitions. [2023-09-01 08:20:52,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.422 [2023-09-01 08:20:52,670 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 633 transitions. [2023-09-01 08:20:52,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 633 transitions. [2023-09-01 08:20:52,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:20:52,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 633 transitions. [2023-09-01 08:20:52,671 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) [2023-09-01 08:20:52,672 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) [2023-09-01 08:20:52,673 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) [2023-09-01 08:20:52,673 INFO L175 Difference]: Start difference. First operand has 99 places, 106 transitions, 909 flow. Second operand 5 states and 633 transitions. [2023-09-01 08:20:52,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 119 transitions, 1199 flow [2023-09-01 08:20:52,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 119 transitions, 1198 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:20:52,704 INFO L231 Difference]: Finished difference. Result has 103 places, 105 transitions, 928 flow [2023-09-01 08:20:52,704 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} [2023-09-01 08:20:52,704 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 72 predicate places. [2023-09-01 08:20:52,704 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 105 transitions, 928 flow [2023-09-01 08:20:52,705 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) [2023-09-01 08:20:52,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:52,705 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:20:52,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 08:20:52,905 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 [2023-09-01 08:20:52,906 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:20:52,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:52,906 INFO L85 PathProgramCache]: Analyzing trace with hash -135164950, now seen corresponding path program 2 times [2023-09-01 08:20:52,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:52,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403346437] [2023-09-01 08:20:52,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:52,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:53,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:20:53,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403346437] [2023-09-01 08:20:53,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403346437] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:20:53,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240750614] [2023-09-01 08:20:53,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:20:53,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:20:53,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:20:53,842 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:20:53,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 08:20:53,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:20:53,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:20:53,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 08:20:53,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:20:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:20:53,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:20:53,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240750614] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:20:53,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:20:53,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2023-09-01 08:20:53,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941843571] [2023-09-01 08:20:53,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:20:53,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 08:20:53,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:20:53,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 08:20:53,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-09-01 08:20:54,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 300 [2023-09-01 08:20:54,044 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) [2023-09-01 08:20:54,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:20:54,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 300 [2023-09-01 08:20:54,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:20:54,461 INFO L130 PetriNetUnfolder]: 1549/2744 cut-off events. [2023-09-01 08:20:54,462 INFO L131 PetriNetUnfolder]: For 25072/25095 co-relation queries the response was YES. [2023-09-01 08:20:54,472 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. [2023-09-01 08:20:54,484 INFO L137 encePairwiseOnDemand]: 292/300 looper letters, 107 selfloop transitions, 32 changer transitions 0/140 dead transitions. [2023-09-01 08:20:54,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 140 transitions, 1509 flow [2023-09-01 08:20:54,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 08:20:54,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 08:20:54,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 640 transitions. [2023-09-01 08:20:54,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2023-09-01 08:20:54,486 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 640 transitions. [2023-09-01 08:20:54,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 640 transitions. [2023-09-01 08:20:54,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:20:54,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 640 transitions. [2023-09-01 08:20:54,491 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) [2023-09-01 08:20:54,492 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) [2023-09-01 08:20:54,492 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) [2023-09-01 08:20:54,493 INFO L175 Difference]: Start difference. First operand has 103 places, 105 transitions, 928 flow. Second operand 5 states and 640 transitions. [2023-09-01 08:20:54,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 140 transitions, 1509 flow [2023-09-01 08:20:54,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 140 transitions, 1475 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-09-01 08:20:54,557 INFO L231 Difference]: Finished difference. Result has 105 places, 110 transitions, 1079 flow [2023-09-01 08:20:54,557 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} [2023-09-01 08:20:54,558 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 74 predicate places. [2023-09-01 08:20:54,558 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 110 transitions, 1079 flow [2023-09-01 08:20:54,558 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) [2023-09-01 08:20:54,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:54,558 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:20:54,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 08:20:54,764 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 [2023-09-01 08:20:54,764 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:20:54,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:54,765 INFO L85 PathProgramCache]: Analyzing trace with hash -127715973, now seen corresponding path program 2 times [2023-09-01 08:20:54,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:54,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924917565] [2023-09-01 08:20:54,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:54,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:55,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:20:55,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924917565] [2023-09-01 08:20:55,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924917565] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:20:55,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794270507] [2023-09-01 08:20:55,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:20:55,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:20:55,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:20:55,406 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:20:55,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 08:20:55,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:20:55,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:20:55,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 08:20:55,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:20:55,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:20:55,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:20:55,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794270507] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:20:55,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:20:55,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2023-09-01 08:20:55,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389717385] [2023-09-01 08:20:55,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:20:55,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 08:20:55,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:20:55,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 08:20:55,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-09-01 08:20:55,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 300 [2023-09-01 08:20:55,618 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) [2023-09-01 08:20:55,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:20:55,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 300 [2023-09-01 08:20:55,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:20:56,036 INFO L130 PetriNetUnfolder]: 1460/2625 cut-off events. [2023-09-01 08:20:56,037 INFO L131 PetriNetUnfolder]: For 28093/28113 co-relation queries the response was YES. [2023-09-01 08:20:56,046 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. [2023-09-01 08:20:56,056 INFO L137 encePairwiseOnDemand]: 292/300 looper letters, 102 selfloop transitions, 30 changer transitions 0/133 dead transitions. [2023-09-01 08:20:56,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 133 transitions, 1492 flow [2023-09-01 08:20:56,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 08:20:56,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 08:20:56,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 639 transitions. [2023-09-01 08:20:56,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426 [2023-09-01 08:20:56,059 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 639 transitions. [2023-09-01 08:20:56,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 639 transitions. [2023-09-01 08:20:56,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:20:56,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 639 transitions. [2023-09-01 08:20:56,060 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) [2023-09-01 08:20:56,062 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) [2023-09-01 08:20:56,062 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) [2023-09-01 08:20:56,062 INFO L175 Difference]: Start difference. First operand has 105 places, 110 transitions, 1079 flow. Second operand 5 states and 639 transitions. [2023-09-01 08:20:56,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 133 transitions, 1492 flow [2023-09-01 08:20:56,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 133 transitions, 1406 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-09-01 08:20:56,143 INFO L231 Difference]: Finished difference. Result has 105 places, 103 transitions, 970 flow [2023-09-01 08:20:56,143 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} [2023-09-01 08:20:56,144 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 74 predicate places. [2023-09-01 08:20:56,144 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 103 transitions, 970 flow [2023-09-01 08:20:56,144 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) [2023-09-01 08:20:56,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:56,145 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:20:56,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 08:20:56,349 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 [2023-09-01 08:20:56,349 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:20:56,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:56,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1342273889, now seen corresponding path program 3 times [2023-09-01 08:20:56,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:56,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098159152] [2023-09-01 08:20:56,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:56,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:56,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:56,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:20:56,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098159152] [2023-09-01 08:20:56,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098159152] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:20:56,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669628494] [2023-09-01 08:20:56,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:20:56,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:20:56,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:20:56,925 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:20:56,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 08:20:57,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 08:20:57,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:20:57,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 08:20:57,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:20:57,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:20:57,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:20:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:20:57,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:20:57,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669628494] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:20:57,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:20:57,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-09-01 08:20:57,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123442990] [2023-09-01 08:20:57,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:20:57,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:20:57,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:20:57,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:20:57,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-09-01 08:20:57,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 300 [2023-09-01 08:20:57,221 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) [2023-09-01 08:20:57,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:20:57,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 300 [2023-09-01 08:20:57,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:20:57,606 INFO L130 PetriNetUnfolder]: 1452/2617 cut-off events. [2023-09-01 08:20:57,606 INFO L131 PetriNetUnfolder]: For 23712/23732 co-relation queries the response was YES. [2023-09-01 08:20:57,613 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. [2023-09-01 08:20:57,621 INFO L137 encePairwiseOnDemand]: 294/300 looper letters, 95 selfloop transitions, 10 changer transitions 6/112 dead transitions. [2023-09-01 08:20:57,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 112 transitions, 1219 flow [2023-09-01 08:20:57,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 08:20:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 08:20:57,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 608 transitions. [2023-09-01 08:20:57,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053333333333333 [2023-09-01 08:20:57,622 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 608 transitions. [2023-09-01 08:20:57,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 608 transitions. [2023-09-01 08:20:57,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:20:57,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 608 transitions. [2023-09-01 08:20:57,623 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) [2023-09-01 08:20:57,624 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) [2023-09-01 08:20:57,625 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) [2023-09-01 08:20:57,625 INFO L175 Difference]: Start difference. First operand has 105 places, 103 transitions, 970 flow. Second operand 5 states and 608 transitions. [2023-09-01 08:20:57,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 112 transitions, 1219 flow [2023-09-01 08:20:57,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 112 transitions, 1159 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 08:20:57,657 INFO L231 Difference]: Finished difference. Result has 105 places, 100 transitions, 911 flow [2023-09-01 08:20:57,657 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} [2023-09-01 08:20:57,658 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 74 predicate places. [2023-09-01 08:20:57,658 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 100 transitions, 911 flow [2023-09-01 08:20:57,658 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) [2023-09-01 08:20:57,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:57,659 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:20:57,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-09-01 08:20:57,865 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 [2023-09-01 08:20:57,865 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:20:57,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:57,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1367208956, now seen corresponding path program 3 times [2023-09-01 08:20:57,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:57,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674303710] [2023-09-01 08:20:57,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:57,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:20:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:20:58,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:20:58,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674303710] [2023-09-01 08:20:58,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674303710] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:20:58,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981482018] [2023-09-01 08:20:58,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:20:58,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:20:58,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:20:58,761 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:20:58,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 08:20:58,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 08:20:58,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:20:58,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 08:20:58,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:20:58,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:20:58,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:20:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:20:58,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:20:58,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981482018] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:20:58,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:20:58,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-09-01 08:20:58,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480220438] [2023-09-01 08:20:58,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:20:58,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:20:58,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:20:58,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:20:58,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-09-01 08:20:59,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 300 [2023-09-01 08:20:59,075 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) [2023-09-01 08:20:59,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:20:59,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 300 [2023-09-01 08:20:59,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:20:59,444 INFO L130 PetriNetUnfolder]: 1558/2753 cut-off events. [2023-09-01 08:20:59,444 INFO L131 PetriNetUnfolder]: For 25151/25171 co-relation queries the response was YES. [2023-09-01 08:20:59,454 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. [2023-09-01 08:20:59,463 INFO L137 encePairwiseOnDemand]: 293/300 looper letters, 77 selfloop transitions, 43 changer transitions 1/122 dead transitions. [2023-09-01 08:20:59,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 122 transitions, 1339 flow [2023-09-01 08:20:59,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 08:20:59,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 08:20:59,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 613 transitions. [2023-09-01 08:20:59,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4086666666666667 [2023-09-01 08:20:59,465 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 613 transitions. [2023-09-01 08:20:59,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 613 transitions. [2023-09-01 08:20:59,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:20:59,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 613 transitions. [2023-09-01 08:20:59,466 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) [2023-09-01 08:20:59,467 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) [2023-09-01 08:20:59,468 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) [2023-09-01 08:20:59,468 INFO L175 Difference]: Start difference. First operand has 105 places, 100 transitions, 911 flow. Second operand 5 states and 613 transitions. [2023-09-01 08:20:59,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 122 transitions, 1339 flow [2023-09-01 08:20:59,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 122 transitions, 1308 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-09-01 08:20:59,526 INFO L231 Difference]: Finished difference. Result has 104 places, 103 transitions, 1071 flow [2023-09-01 08:20:59,526 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} [2023-09-01 08:20:59,526 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 73 predicate places. [2023-09-01 08:20:59,527 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 103 transitions, 1071 flow [2023-09-01 08:20:59,527 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) [2023-09-01 08:20:59,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:20:59,527 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:20:59,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 08:20:59,733 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 [2023-09-01 08:20:59,733 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:20:59,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:20:59,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1367209009, now seen corresponding path program 3 times [2023-09-01 08:20:59,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:20:59,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120080930] [2023-09-01 08:20:59,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:20:59,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:20:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:00,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:00,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120080930] [2023-09-01 08:21:00,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120080930] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:00,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761687605] [2023-09-01 08:21:00,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:21:00,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:00,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:00,540 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:21:00,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 08:21:00,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 08:21:00,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:21:00,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 08:21:00,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:00,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:21:00,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 08:21:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:21:00,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:21:00,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761687605] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:21:00,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:21:00,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-09-01 08:21:00,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525104658] [2023-09-01 08:21:00,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:21:00,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:21:00,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:00,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:21:00,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-09-01 08:21:00,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 300 [2023-09-01 08:21:00,889 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) [2023-09-01 08:21:00,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:00,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 300 [2023-09-01 08:21:00,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:01,250 INFO L130 PetriNetUnfolder]: 1498/2677 cut-off events. [2023-09-01 08:21:01,251 INFO L131 PetriNetUnfolder]: For 27697/27717 co-relation queries the response was YES. [2023-09-01 08:21:01,258 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. [2023-09-01 08:21:01,266 INFO L137 encePairwiseOnDemand]: 293/300 looper letters, 77 selfloop transitions, 41 changer transitions 1/120 dead transitions. [2023-09-01 08:21:01,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 120 transitions, 1409 flow [2023-09-01 08:21:01,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 08:21:01,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 08:21:01,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 612 transitions. [2023-09-01 08:21:01,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.408 [2023-09-01 08:21:01,267 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 612 transitions. [2023-09-01 08:21:01,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 612 transitions. [2023-09-01 08:21:01,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:01,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 612 transitions. [2023-09-01 08:21:01,268 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) [2023-09-01 08:21:01,269 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) [2023-09-01 08:21:01,269 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) [2023-09-01 08:21:01,269 INFO L175 Difference]: Start difference. First operand has 104 places, 103 transitions, 1071 flow. Second operand 5 states and 612 transitions. [2023-09-01 08:21:01,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 120 transitions, 1409 flow [2023-09-01 08:21:01,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 120 transitions, 1352 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-09-01 08:21:01,313 INFO L231 Difference]: Finished difference. Result has 104 places, 101 transitions, 1056 flow [2023-09-01 08:21:01,314 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} [2023-09-01 08:21:01,314 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 73 predicate places. [2023-09-01 08:21:01,314 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 101 transitions, 1056 flow [2023-09-01 08:21:01,314 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) [2023-09-01 08:21:01,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:01,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:21:01,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 08:21:01,515 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 [2023-09-01 08:21:01,515 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:21:01,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:01,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1364709197, now seen corresponding path program 1 times [2023-09-01 08:21:01,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:01,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307329262] [2023-09-01 08:21:01,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:01,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:21:01,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:01,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307329262] [2023-09-01 08:21:01,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307329262] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:21:01,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:21:01,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:21:01,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238773838] [2023-09-01 08:21:01,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:21:01,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:21:01,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:01,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:21:01,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 08:21:01,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 300 [2023-09-01 08:21:01,581 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) [2023-09-01 08:21:01,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:01,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 300 [2023-09-01 08:21:01,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:01,986 INFO L130 PetriNetUnfolder]: 1801/3398 cut-off events. [2023-09-01 08:21:01,987 INFO L131 PetriNetUnfolder]: For 34690/34710 co-relation queries the response was YES. [2023-09-01 08:21:01,995 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. [2023-09-01 08:21:02,005 INFO L137 encePairwiseOnDemand]: 294/300 looper letters, 88 selfloop transitions, 46 changer transitions 1/136 dead transitions. [2023-09-01 08:21:02,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 136 transitions, 1709 flow [2023-09-01 08:21:02,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:21:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:21:02,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 549 transitions. [2023-09-01 08:21:02,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575 [2023-09-01 08:21:02,007 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 549 transitions. [2023-09-01 08:21:02,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 549 transitions. [2023-09-01 08:21:02,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:02,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 549 transitions. [2023-09-01 08:21:02,008 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) [2023-09-01 08:21:02,009 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) [2023-09-01 08:21:02,009 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) [2023-09-01 08:21:02,010 INFO L175 Difference]: Start difference. First operand has 104 places, 101 transitions, 1056 flow. Second operand 4 states and 549 transitions. [2023-09-01 08:21:02,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 136 transitions, 1709 flow [2023-09-01 08:21:02,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 136 transitions, 1597 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-09-01 08:21:02,075 INFO L231 Difference]: Finished difference. Result has 105 places, 121 transitions, 1428 flow [2023-09-01 08:21:02,075 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} [2023-09-01 08:21:02,075 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 74 predicate places. [2023-09-01 08:21:02,076 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 121 transitions, 1428 flow [2023-09-01 08:21:02,076 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) [2023-09-01 08:21:02,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:02,076 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:21:02,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-09-01 08:21:02,077 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:21:02,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:02,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1343609976, now seen corresponding path program 3 times [2023-09-01 08:21:02,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:02,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393167022] [2023-09-01 08:21:02,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:02,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:02,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:02,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393167022] [2023-09-01 08:21:02,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393167022] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:02,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73792700] [2023-09-01 08:21:02,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:21:02,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:02,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:02,656 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:21:02,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 08:21:02,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 08:21:02,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:21:02,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 08:21:02,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:02,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:21:02,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:21:02,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73792700] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:21:02,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:21:02,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2023-09-01 08:21:02,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788088660] [2023-09-01 08:21:02,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:21:02,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 08:21:02,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:02,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 08:21:02,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-09-01 08:21:02,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 300 [2023-09-01 08:21:02,877 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) [2023-09-01 08:21:02,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:02,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 300 [2023-09-01 08:21:02,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:03,346 INFO L130 PetriNetUnfolder]: 1794/3379 cut-off events. [2023-09-01 08:21:03,346 INFO L131 PetriNetUnfolder]: For 37448/37468 co-relation queries the response was YES. [2023-09-01 08:21:03,358 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. [2023-09-01 08:21:03,372 INFO L137 encePairwiseOnDemand]: 295/300 looper letters, 115 selfloop transitions, 9 changer transitions 1/126 dead transitions. [2023-09-01 08:21:03,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 126 transitions, 1685 flow [2023-09-01 08:21:03,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:21:03,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:21:03,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 507 transitions. [2023-09-01 08:21:03,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225 [2023-09-01 08:21:03,374 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 507 transitions. [2023-09-01 08:21:03,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 507 transitions. [2023-09-01 08:21:03,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:03,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 507 transitions. [2023-09-01 08:21:03,375 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) [2023-09-01 08:21:03,377 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) [2023-09-01 08:21:03,377 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) [2023-09-01 08:21:03,377 INFO L175 Difference]: Start difference. First operand has 105 places, 121 transitions, 1428 flow. Second operand 4 states and 507 transitions. [2023-09-01 08:21:03,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 126 transitions, 1685 flow [2023-09-01 08:21:03,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 126 transitions, 1597 flow, removed 44 selfloop flow, removed 0 redundant places. [2023-09-01 08:21:03,517 INFO L231 Difference]: Finished difference. Result has 106 places, 120 transitions, 1348 flow [2023-09-01 08:21:03,517 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} [2023-09-01 08:21:03,518 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 75 predicate places. [2023-09-01 08:21:03,518 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 120 transitions, 1348 flow [2023-09-01 08:21:03,518 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) [2023-09-01 08:21:03,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:03,519 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:21:03,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 08:21:03,722 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 [2023-09-01 08:21:03,722 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:21:03,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:03,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1334287049, now seen corresponding path program 4 times [2023-09-01 08:21:03,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:03,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116034203] [2023-09-01 08:21:03,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:03,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:04,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:04,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116034203] [2023-09-01 08:21:04,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116034203] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:04,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331557838] [2023-09-01 08:21:04,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:21:04,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:04,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:04,413 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:21:04,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 08:21:04,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:21:04,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:21:04,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 08:21:04,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:21:04,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:04,629 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:21:04,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-09-01 08:21:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:21:04,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331557838] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:04,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 08:21:04,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 5] total 15 [2023-09-01 08:21:04,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292210489] [2023-09-01 08:21:04,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:21:04,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 08:21:04,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:04,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 08:21:04,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-09-01 08:21:04,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 300 [2023-09-01 08:21:04,705 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) [2023-09-01 08:21:04,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:04,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 300 [2023-09-01 08:21:04,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:05,075 INFO L130 PetriNetUnfolder]: 1730/3291 cut-off events. [2023-09-01 08:21:05,075 INFO L131 PetriNetUnfolder]: For 28371/28391 co-relation queries the response was YES. [2023-09-01 08:21:05,085 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. [2023-09-01 08:21:05,096 INFO L137 encePairwiseOnDemand]: 292/300 looper letters, 104 selfloop transitions, 24 changer transitions 1/130 dead transitions. [2023-09-01 08:21:05,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 130 transitions, 1672 flow [2023-09-01 08:21:05,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:21:05,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:21:05,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 511 transitions. [2023-09-01 08:21:05,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42583333333333334 [2023-09-01 08:21:05,097 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 511 transitions. [2023-09-01 08:21:05,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 511 transitions. [2023-09-01 08:21:05,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:05,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 511 transitions. [2023-09-01 08:21:05,098 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) [2023-09-01 08:21:05,099 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) [2023-09-01 08:21:05,099 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) [2023-09-01 08:21:05,099 INFO L175 Difference]: Start difference. First operand has 106 places, 120 transitions, 1348 flow. Second operand 4 states and 511 transitions. [2023-09-01 08:21:05,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 130 transitions, 1672 flow [2023-09-01 08:21:05,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 130 transitions, 1657 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 08:21:05,156 INFO L231 Difference]: Finished difference. Result has 107 places, 116 transitions, 1320 flow [2023-09-01 08:21:05,156 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} [2023-09-01 08:21:05,156 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 76 predicate places. [2023-09-01 08:21:05,156 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 116 transitions, 1320 flow [2023-09-01 08:21:05,157 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) [2023-09-01 08:21:05,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:05,157 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:21:05,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 08:21:05,357 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 [2023-09-01 08:21:05,358 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:21:05,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:05,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1343610813, now seen corresponding path program 4 times [2023-09-01 08:21:05,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:05,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381786486] [2023-09-01 08:21:05,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:05,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:06,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:06,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381786486] [2023-09-01 08:21:06,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381786486] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:06,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56573631] [2023-09-01 08:21:06,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:21:06,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:06,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:06,036 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:21:06,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 08:21:06,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:21:06,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:21:06,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 08:21:06,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:06,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:21:06,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:06,264 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:21:06,265 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 [2023-09-01 08:21:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:21:06,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56573631] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:06,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 08:21:06,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 5] total 15 [2023-09-01 08:21:06,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622300805] [2023-09-01 08:21:06,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:21:06,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 08:21:06,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:06,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 08:21:06,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-09-01 08:21:06,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 300 [2023-09-01 08:21:06,350 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) [2023-09-01 08:21:06,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:06,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 300 [2023-09-01 08:21:06,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:06,835 INFO L130 PetriNetUnfolder]: 1664/3184 cut-off events. [2023-09-01 08:21:06,835 INFO L131 PetriNetUnfolder]: For 28977/28997 co-relation queries the response was YES. [2023-09-01 08:21:06,850 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. [2023-09-01 08:21:06,903 INFO L137 encePairwiseOnDemand]: 294/300 looper letters, 104 selfloop transitions, 22 changer transitions 0/127 dead transitions. [2023-09-01 08:21:06,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 127 transitions, 1632 flow [2023-09-01 08:21:06,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:21:06,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:21:06,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 509 transitions. [2023-09-01 08:21:06,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4241666666666667 [2023-09-01 08:21:06,906 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 509 transitions. [2023-09-01 08:21:06,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 509 transitions. [2023-09-01 08:21:06,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:06,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 509 transitions. [2023-09-01 08:21:06,907 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) [2023-09-01 08:21:06,909 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) [2023-09-01 08:21:06,910 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) [2023-09-01 08:21:06,910 INFO L175 Difference]: Start difference. First operand has 107 places, 116 transitions, 1320 flow. Second operand 4 states and 509 transitions. [2023-09-01 08:21:06,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 127 transitions, 1632 flow [2023-09-01 08:21:06,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 127 transitions, 1539 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-09-01 08:21:06,978 INFO L231 Difference]: Finished difference. Result has 99 places, 114 transitions, 1225 flow [2023-09-01 08:21:06,979 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} [2023-09-01 08:21:06,979 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 68 predicate places. [2023-09-01 08:21:06,980 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 114 transitions, 1225 flow [2023-09-01 08:21:06,980 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) [2023-09-01 08:21:06,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:06,980 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:21:06,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 08:21:07,186 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 [2023-09-01 08:21:07,186 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:21:07,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:07,186 INFO L85 PathProgramCache]: Analyzing trace with hash -784322498, now seen corresponding path program 1 times [2023-09-01 08:21:07,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:07,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132871368] [2023-09-01 08:21:07,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:07,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:21:07,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:07,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132871368] [2023-09-01 08:21:07,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132871368] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:07,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350206500] [2023-09-01 08:21:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:07,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:07,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:07,274 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:21:07,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 08:21:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:07,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 08:21:07,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:21:07,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:21:07,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350206500] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:21:07,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:21:07,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-09-01 08:21:07,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922903422] [2023-09-01 08:21:07,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:21:07,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 08:21:07,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:07,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 08:21:07,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-09-01 08:21:07,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 300 [2023-09-01 08:21:07,565 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) [2023-09-01 08:21:07,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:07,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 300 [2023-09-01 08:21:07,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:07,931 INFO L130 PetriNetUnfolder]: 1191/2319 cut-off events. [2023-09-01 08:21:07,931 INFO L131 PetriNetUnfolder]: For 18572/18592 co-relation queries the response was YES. [2023-09-01 08:21:07,940 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. [2023-09-01 08:21:07,949 INFO L137 encePairwiseOnDemand]: 296/300 looper letters, 71 selfloop transitions, 3 changer transitions 16/91 dead transitions. [2023-09-01 08:21:07,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 91 transitions, 1127 flow [2023-09-01 08:21:07,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 08:21:07,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 08:21:07,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 762 transitions. [2023-09-01 08:21:07,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42333333333333334 [2023-09-01 08:21:07,952 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 762 transitions. [2023-09-01 08:21:07,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 762 transitions. [2023-09-01 08:21:07,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:07,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 762 transitions. [2023-09-01 08:21:07,954 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) [2023-09-01 08:21:07,955 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) [2023-09-01 08:21:07,956 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) [2023-09-01 08:21:07,956 INFO L175 Difference]: Start difference. First operand has 99 places, 114 transitions, 1225 flow. Second operand 6 states and 762 transitions. [2023-09-01 08:21:07,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 91 transitions, 1127 flow [2023-09-01 08:21:08,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 91 transitions, 1046 flow, removed 17 selfloop flow, removed 8 redundant places. [2023-09-01 08:21:08,013 INFO L231 Difference]: Finished difference. Result has 84 places, 75 transitions, 738 flow [2023-09-01 08:21:08,013 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} [2023-09-01 08:21:08,013 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2023-09-01 08:21:08,013 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 738 flow [2023-09-01 08:21:08,014 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) [2023-09-01 08:21:08,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:08,014 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:21:08,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 08:21:08,220 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 [2023-09-01 08:21:08,220 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:21:08,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:08,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1822530941, now seen corresponding path program 2 times [2023-09-01 08:21:08,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:08,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214229464] [2023-09-01 08:21:08,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:08,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:08,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:08,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214229464] [2023-09-01 08:21:08,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214229464] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:08,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979730123] [2023-09-01 08:21:08,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:21:08,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:08,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:08,724 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:21:08,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 08:21:08,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:21:08,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:21:08,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 08:21:08,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:21:08,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:09,070 INFO L321 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-09-01 08:21:09,070 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 [2023-09-01 08:21:09,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:21:09,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979730123] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:21:09,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:21:09,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 18 [2023-09-01 08:21:09,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768423154] [2023-09-01 08:21:09,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:21:09,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 08:21:09,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:09,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 08:21:09,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-09-01 08:21:09,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-09-01 08:21:09,615 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) [2023-09-01 08:21:09,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:09,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-09-01 08:21:09,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:10,695 INFO L130 PetriNetUnfolder]: 1994/3657 cut-off events. [2023-09-01 08:21:10,695 INFO L131 PetriNetUnfolder]: For 24338/24354 co-relation queries the response was YES. [2023-09-01 08:21:10,703 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. [2023-09-01 08:21:10,713 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 143 selfloop transitions, 84 changer transitions 1/229 dead transitions. [2023-09-01 08:21:10,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 229 transitions, 2373 flow [2023-09-01 08:21:10,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 08:21:10,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 08:21:10,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3322 transitions. [2023-09-01 08:21:10,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3954761904761905 [2023-09-01 08:21:10,718 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3322 transitions. [2023-09-01 08:21:10,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3322 transitions. [2023-09-01 08:21:10,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:10,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3322 transitions. [2023-09-01 08:21:10,724 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) [2023-09-01 08:21:10,730 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) [2023-09-01 08:21:10,730 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) [2023-09-01 08:21:10,730 INFO L175 Difference]: Start difference. First operand has 84 places, 75 transitions, 738 flow. Second operand 28 states and 3322 transitions. [2023-09-01 08:21:10,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 229 transitions, 2373 flow [2023-09-01 08:21:10,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 229 transitions, 2311 flow, removed 28 selfloop flow, removed 6 redundant places. [2023-09-01 08:21:10,812 INFO L231 Difference]: Finished difference. Result has 102 places, 133 transitions, 1666 flow [2023-09-01 08:21:10,812 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} [2023-09-01 08:21:10,813 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 71 predicate places. [2023-09-01 08:21:10,813 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 133 transitions, 1666 flow [2023-09-01 08:21:10,813 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) [2023-09-01 08:21:10,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:10,814 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:21:10,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-09-01 08:21:11,019 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 [2023-09-01 08:21:11,019 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:21:11,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:11,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1819042458, now seen corresponding path program 2 times [2023-09-01 08:21:11,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:11,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049980506] [2023-09-01 08:21:11,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:11,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:11,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:11,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049980506] [2023-09-01 08:21:11,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049980506] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:11,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543915042] [2023-09-01 08:21:11,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:21:11,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:11,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:11,630 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:21:11,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 08:21:11,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:21:11,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:21:11,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 43 conjunts are in the unsatisfiable core [2023-09-01 08:21:11,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:11,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 08:21:11,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:21:11,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:21:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:12,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:12,554 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:21:12,554 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 [2023-09-01 08:21:12,566 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 08:21:12,567 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 152 treesize of output 140 [2023-09-01 08:21:12,577 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 08:21:12,578 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 [2023-09-01 08:21:12,590 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 08:21:12,590 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 [2023-09-01 08:21:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:12,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543915042] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:21:12,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:21:12,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2023-09-01 08:21:12,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064453988] [2023-09-01 08:21:12,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:21:12,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 08:21:12,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:12,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 08:21:12,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=545, Unknown=1, NotChecked=0, Total=702 [2023-09-01 08:21:13,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-09-01 08:21:13,598 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) [2023-09-01 08:21:13,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:13,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-09-01 08:21:13,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:15,606 INFO L130 PetriNetUnfolder]: 2177/3992 cut-off events. [2023-09-01 08:21:15,606 INFO L131 PetriNetUnfolder]: For 37343/37359 co-relation queries the response was YES. [2023-09-01 08:21:15,615 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. [2023-09-01 08:21:15,629 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 193 selfloop transitions, 117 changer transitions 8/319 dead transitions. [2023-09-01 08:21:15,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 319 transitions, 4195 flow [2023-09-01 08:21:15,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 08:21:15,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 08:21:15,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2567 transitions. [2023-09-01 08:21:15,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3169135802469136 [2023-09-01 08:21:15,635 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2567 transitions. [2023-09-01 08:21:15,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2567 transitions. [2023-09-01 08:21:15,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:15,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2567 transitions. [2023-09-01 08:21:15,640 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) [2023-09-01 08:21:15,646 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) [2023-09-01 08:21:15,647 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) [2023-09-01 08:21:15,647 INFO L175 Difference]: Start difference. First operand has 102 places, 133 transitions, 1666 flow. Second operand 27 states and 2567 transitions. [2023-09-01 08:21:15,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 319 transitions, 4195 flow [2023-09-01 08:21:15,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 319 transitions, 3689 flow, removed 241 selfloop flow, removed 4 redundant places. [2023-09-01 08:21:15,727 INFO L231 Difference]: Finished difference. Result has 136 places, 204 transitions, 2777 flow [2023-09-01 08:21:15,727 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} [2023-09-01 08:21:15,728 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 105 predicate places. [2023-09-01 08:21:15,728 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 204 transitions, 2777 flow [2023-09-01 08:21:15,729 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) [2023-09-01 08:21:15,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:15,729 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:21:15,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-09-01 08:21:15,930 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 [2023-09-01 08:21:15,930 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:21:15,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:15,931 INFO L85 PathProgramCache]: Analyzing trace with hash 419810221, now seen corresponding path program 1 times [2023-09-01 08:21:15,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:15,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320079862] [2023-09-01 08:21:15,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:15,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:16,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:16,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320079862] [2023-09-01 08:21:16,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320079862] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:16,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645466468] [2023-09-01 08:21:16,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:16,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:16,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:16,509 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:21:16,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 08:21:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:16,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 08:21:16,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:16,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:21:16,691 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 [2023-09-01 08:21:16,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:21:16,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 08:21:16,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:21:16,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 08:21:16,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:16,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:17,378 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:21:17,378 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 [2023-09-01 08:21:17,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:21:17,400 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 [2023-09-01 08:21:17,424 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:21:17,425 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 [2023-09-01 08:21:17,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:21:17,441 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 [2023-09-01 08:21:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:18,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645466468] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:21:18,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:21:18,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-09-01 08:21:18,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095622850] [2023-09-01 08:21:18,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:21:18,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 08:21:18,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:18,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 08:21:18,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=686, Unknown=4, NotChecked=0, Total=812 [2023-09-01 08:21:20,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:21:23,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:21:25,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:21:27,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:21:27,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-09-01 08:21:27,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 204 transitions, 2777 flow. Second operand has 29 states, 29 states have (on average 90.24137931034483) internal successors, (2617), 29 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:27,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:27,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-09-01 08:21:27,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:29,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:21:32,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:21:33,858 INFO L130 PetriNetUnfolder]: 1521/2930 cut-off events. [2023-09-01 08:21:33,858 INFO L131 PetriNetUnfolder]: For 44460/44474 co-relation queries the response was YES. [2023-09-01 08:21:33,866 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. [2023-09-01 08:21:33,873 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 165 selfloop transitions, 87 changer transitions 11/264 dead transitions. [2023-09-01 08:21:33,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 264 transitions, 3381 flow [2023-09-01 08:21:33,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 08:21:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 08:21:33,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2904 transitions. [2023-09-01 08:21:33,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31225806451612903 [2023-09-01 08:21:33,878 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2904 transitions. [2023-09-01 08:21:33,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2904 transitions. [2023-09-01 08:21:33,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:33,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2904 transitions. [2023-09-01 08:21:33,882 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) [2023-09-01 08:21:33,888 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) [2023-09-01 08:21:33,889 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) [2023-09-01 08:21:33,889 INFO L175 Difference]: Start difference. First operand has 136 places, 204 transitions, 2777 flow. Second operand 31 states and 2904 transitions. [2023-09-01 08:21:33,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 264 transitions, 3381 flow [2023-09-01 08:21:33,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 264 transitions, 3065 flow, removed 128 selfloop flow, removed 16 redundant places. [2023-09-01 08:21:33,995 INFO L231 Difference]: Finished difference. Result has 160 places, 188 transitions, 2545 flow [2023-09-01 08:21:33,995 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} [2023-09-01 08:21:33,996 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 129 predicate places. [2023-09-01 08:21:33,996 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 188 transitions, 2545 flow [2023-09-01 08:21:33,996 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) [2023-09-01 08:21:33,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:33,997 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:21:34,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 08:21:34,197 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 [2023-09-01 08:21:34,197 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:21:34,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:34,198 INFO L85 PathProgramCache]: Analyzing trace with hash 667395804, now seen corresponding path program 1 times [2023-09-01 08:21:34,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:34,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624385020] [2023-09-01 08:21:34,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:34,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:34,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:34,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624385020] [2023-09-01 08:21:34,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624385020] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:34,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367609121] [2023-09-01 08:21:34,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:34,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:34,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:34,792 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:21:34,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 08:21:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:34,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 43 conjunts are in the unsatisfiable core [2023-09-01 08:21:34,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:34,928 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 [2023-09-01 08:21:34,968 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 [2023-09-01 08:21:35,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:21:35,035 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 [2023-09-01 08:21:35,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:21:35,208 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 [2023-09-01 08:21:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:35,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:35,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:21:35,842 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 [2023-09-01 08:21:35,868 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:21:35,868 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 [2023-09-01 08:21:35,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:21:35,888 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 [2023-09-01 08:21:35,896 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:21:35,897 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 [2023-09-01 08:21:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:36,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367609121] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:21:36,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:21:36,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-09-01 08:21:36,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950682643] [2023-09-01 08:21:36,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:21:36,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 08:21:36,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:36,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 08:21:36,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=708, Unknown=5, NotChecked=0, Total=812 [2023-09-01 08:21:37,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-09-01 08:21:37,557 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) [2023-09-01 08:21:37,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:37,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-09-01 08:21:37,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:39,996 INFO L130 PetriNetUnfolder]: 1495/2912 cut-off events. [2023-09-01 08:21:39,996 INFO L131 PetriNetUnfolder]: For 38635/38649 co-relation queries the response was YES. [2023-09-01 08:21:40,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19905 conditions, 2912 events. 1495/2912 cut-off events. For 38635/38649 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19306 event pairs, 645 based on Foata normal form. 48/2874 useless extension candidates. Maximal degree in co-relation 19844. Up to 2290 conditions per place. [2023-09-01 08:21:40,013 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 147 selfloop transitions, 74 changer transitions 5/227 dead transitions. [2023-09-01 08:21:40,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 227 transitions, 3193 flow [2023-09-01 08:21:40,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 08:21:40,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 08:21:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1416 transitions. [2023-09-01 08:21:40,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31466666666666665 [2023-09-01 08:21:40,015 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1416 transitions. [2023-09-01 08:21:40,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1416 transitions. [2023-09-01 08:21:40,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:40,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1416 transitions. [2023-09-01 08:21:40,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 94.4) internal successors, (1416), 15 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:40,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 300.0) internal successors, (4800), 16 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:40,020 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 300.0) internal successors, (4800), 16 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:40,021 INFO L175 Difference]: Start difference. First operand has 160 places, 188 transitions, 2545 flow. Second operand 15 states and 1416 transitions. [2023-09-01 08:21:40,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 227 transitions, 3193 flow [2023-09-01 08:21:40,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 227 transitions, 2951 flow, removed 97 selfloop flow, removed 12 redundant places. [2023-09-01 08:21:40,149 INFO L231 Difference]: Finished difference. Result has 164 places, 192 transitions, 2585 flow [2023-09-01 08:21:40,150 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=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2585, PETRI_PLACES=164, PETRI_TRANSITIONS=192} [2023-09-01 08:21:40,150 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 133 predicate places. [2023-09-01 08:21:40,150 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 192 transitions, 2585 flow [2023-09-01 08:21:40,150 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) [2023-09-01 08:21:40,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:40,151 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:21:40,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-09-01 08:21:40,353 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 [2023-09-01 08:21:40,353 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:21:40,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:40,353 INFO L85 PathProgramCache]: Analyzing trace with hash 419810274, now seen corresponding path program 2 times [2023-09-01 08:21:40,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:40,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840859153] [2023-09-01 08:21:40,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:40,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:40,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:40,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840859153] [2023-09-01 08:21:40,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840859153] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:40,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114487654] [2023-09-01 08:21:40,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:21:40,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:40,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:40,691 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:21:40,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 08:21:40,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:21:40,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:21:40,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 08:21:40,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:40,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 08:21:40,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:21:40,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:21:41,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:41,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:41,399 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:21:41,400 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 [2023-09-01 08:21:41,413 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 08:21:41,413 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 [2023-09-01 08:21:41,427 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 08:21:41,428 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 [2023-09-01 08:21:41,443 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 08:21:41,443 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 [2023-09-01 08:21:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:41,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114487654] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:21:41,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:21:41,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-09-01 08:21:41,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35144531] [2023-09-01 08:21:41,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:21:41,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 08:21:41,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:41,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 08:21:41,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=500, Unknown=2, NotChecked=0, Total=600 [2023-09-01 08:21:43,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:21:45,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:21:48,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:21:50,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:21:52,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:21:54,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:21:56,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:21:58,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:21:58,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-09-01 08:21:58,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 192 transitions, 2585 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) [2023-09-01 08:21:58,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:58,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-09-01 08:21:58,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:59,687 INFO L130 PetriNetUnfolder]: 1327/2539 cut-off events. [2023-09-01 08:21:59,687 INFO L131 PetriNetUnfolder]: For 26535/26549 co-relation queries the response was YES. [2023-09-01 08:21:59,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16620 conditions, 2539 events. 1327/2539 cut-off events. For 26535/26549 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15970 event pairs, 644 based on Foata normal form. 40/2493 useless extension candidates. Maximal degree in co-relation 16559. Up to 2283 conditions per place. [2023-09-01 08:21:59,707 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 123 selfloop transitions, 40 changer transitions 7/171 dead transitions. [2023-09-01 08:21:59,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 171 transitions, 2392 flow [2023-09-01 08:21:59,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 08:21:59,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 08:21:59,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1308 transitions. [2023-09-01 08:21:59,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31142857142857144 [2023-09-01 08:21:59,710 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1308 transitions. [2023-09-01 08:21:59,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1308 transitions. [2023-09-01 08:21:59,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:59,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1308 transitions. [2023-09-01 08:21:59,713 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) [2023-09-01 08:21:59,716 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) [2023-09-01 08:21:59,716 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) [2023-09-01 08:21:59,717 INFO L175 Difference]: Start difference. First operand has 164 places, 192 transitions, 2585 flow. Second operand 14 states and 1308 transitions. [2023-09-01 08:21:59,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 171 transitions, 2392 flow [2023-09-01 08:21:59,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 171 transitions, 2211 flow, removed 50 selfloop flow, removed 16 redundant places. [2023-09-01 08:21:59,813 INFO L231 Difference]: Finished difference. Result has 158 places, 150 transitions, 1854 flow [2023-09-01 08:21:59,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=144, 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=1854, PETRI_PLACES=158, PETRI_TRANSITIONS=150} [2023-09-01 08:21:59,814 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 127 predicate places. [2023-09-01 08:21:59,814 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 150 transitions, 1854 flow [2023-09-01 08:21:59,814 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) [2023-09-01 08:21:59,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:59,815 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:21:59,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-09-01 08:22:00,015 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 [2023-09-01 08:22:00,015 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:22:00,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:22:00,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1029802873, now seen corresponding path program 2 times [2023-09-01 08:22:00,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:22:00,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180657769] [2023-09-01 08:22:00,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:22:00,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:22:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:22:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:22:00,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:22:00,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180657769] [2023-09-01 08:22:00,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180657769] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:22:00,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710289172] [2023-09-01 08:22:00,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:22:00,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:22:00,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:22:00,457 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:22:00,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 08:22:00,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:22:00,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:22:00,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2023-09-01 08:22:00,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:22:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:22:00,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:22:00,682 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 08:22:00,683 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 [2023-09-01 08:22:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:22:00,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710289172] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:22:00,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:22:00,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 16 [2023-09-01 08:22:00,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540369132] [2023-09-01 08:22:00,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:22:00,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 08:22:00,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:22:00,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 08:22:00,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-09-01 08:22:01,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-09-01 08:22:01,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 150 transitions, 1854 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) [2023-09-01 08:22:01,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:22:01,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-09-01 08:22:01,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:22:01,991 INFO L130 PetriNetUnfolder]: 1608/3051 cut-off events. [2023-09-01 08:22:01,991 INFO L131 PetriNetUnfolder]: For 36936/36950 co-relation queries the response was YES. [2023-09-01 08:22:01,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20452 conditions, 3051 events. 1608/3051 cut-off events. For 36936/36950 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 20110 event pairs, 233 based on Foata normal form. 140/3139 useless extension candidates. Maximal degree in co-relation 20398. Up to 997 conditions per place. [2023-09-01 08:22:02,007 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 94 selfloop transitions, 111 changer transitions 14/220 dead transitions. [2023-09-01 08:22:02,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 220 transitions, 2941 flow [2023-09-01 08:22:02,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 08:22:02,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 08:22:02,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2026 transitions. [2023-09-01 08:22:02,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39725490196078433 [2023-09-01 08:22:02,010 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2026 transitions. [2023-09-01 08:22:02,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2026 transitions. [2023-09-01 08:22:02,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:22:02,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2026 transitions. [2023-09-01 08:22:02,012 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) [2023-09-01 08:22:02,015 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) [2023-09-01 08:22:02,015 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) [2023-09-01 08:22:02,015 INFO L175 Difference]: Start difference. First operand has 158 places, 150 transitions, 1854 flow. Second operand 17 states and 2026 transitions. [2023-09-01 08:22:02,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 220 transitions, 2941 flow [2023-09-01 08:22:02,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 220 transitions, 2860 flow, removed 17 selfloop flow, removed 9 redundant places. [2023-09-01 08:22:02,115 INFO L231 Difference]: Finished difference. Result has 160 places, 154 transitions, 2177 flow [2023-09-01 08:22:02,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1733, PETRI_DIFFERENCE_MINUEND_PLACES=144, 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=2177, PETRI_PLACES=160, PETRI_TRANSITIONS=154} [2023-09-01 08:22:02,116 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 129 predicate places. [2023-09-01 08:22:02,116 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 154 transitions, 2177 flow [2023-09-01 08:22:02,116 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) [2023-09-01 08:22:02,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:22:02,116 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:22:02,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-09-01 08:22:02,317 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 [2023-09-01 08:22:02,317 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:22:02,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:22:02,318 INFO L85 PathProgramCache]: Analyzing trace with hash -124527854, now seen corresponding path program 3 times [2023-09-01 08:22:02,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:22:02,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935825123] [2023-09-01 08:22:02,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:22:02,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:22:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:22:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:22:02,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:22:02,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935825123] [2023-09-01 08:22:02,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935825123] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:22:02,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110084772] [2023-09-01 08:22:02,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:22:02,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:22:02,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:22:02,854 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:22:02,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 08:22:03,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 08:22:03,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:22:03,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 08:22:03,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:22:03,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:22:03,129 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 [2023-09-01 08:22:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:22:03,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:22:03,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:22:03,256 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 44 treesize of output 37 [2023-09-01 08:22:03,263 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 10 treesize of output 3 [2023-09-01 08:22:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:22:03,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110084772] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:22:03,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:22:03,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 21 [2023-09-01 08:22:03,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627884158] [2023-09-01 08:22:03,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:22:03,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 08:22:03,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:22:03,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 08:22:03,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=437, Unknown=4, NotChecked=0, Total=506 [2023-09-01 08:22:04,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 300 [2023-09-01 08:22:04,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 154 transitions, 2177 flow. Second operand has 23 states, 23 states have (on average 93.52173913043478) internal successors, (2151), 23 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:04,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:22:04,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 300 [2023-09-01 08:22:04,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:22:04,908 INFO L130 PetriNetUnfolder]: 1521/2907 cut-off events. [2023-09-01 08:22:04,908 INFO L131 PetriNetUnfolder]: For 38830/38837 co-relation queries the response was YES. [2023-09-01 08:22:04,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20553 conditions, 2907 events. 1521/2907 cut-off events. For 38830/38837 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19091 event pairs, 391 based on Foata normal form. 57/2912 useless extension candidates. Maximal degree in co-relation 20500. Up to 1791 conditions per place. [2023-09-01 08:22:04,930 INFO L137 encePairwiseOnDemand]: 292/300 looper letters, 99 selfloop transitions, 83 changer transitions 9/192 dead transitions. [2023-09-01 08:22:04,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 192 transitions, 2723 flow [2023-09-01 08:22:04,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 08:22:04,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 08:22:04,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1561 transitions. [2023-09-01 08:22:04,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3252083333333333 [2023-09-01 08:22:04,932 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1561 transitions. [2023-09-01 08:22:04,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1561 transitions. [2023-09-01 08:22:04,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:22:04,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1561 transitions. [2023-09-01 08:22:04,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 97.5625) internal successors, (1561), 16 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:04,939 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) [2023-09-01 08:22:04,939 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) [2023-09-01 08:22:04,939 INFO L175 Difference]: Start difference. First operand has 160 places, 154 transitions, 2177 flow. Second operand 16 states and 1561 transitions. [2023-09-01 08:22:04,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 192 transitions, 2723 flow [2023-09-01 08:22:05,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 192 transitions, 2390 flow, removed 87 selfloop flow, removed 12 redundant places. [2023-09-01 08:22:05,089 INFO L231 Difference]: Finished difference. Result has 158 places, 147 transitions, 1957 flow [2023-09-01 08:22:05,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1957, PETRI_PLACES=158, PETRI_TRANSITIONS=147} [2023-09-01 08:22:05,089 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 127 predicate places. [2023-09-01 08:22:05,089 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 147 transitions, 1957 flow [2023-09-01 08:22:05,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 93.52173913043478) internal successors, (2151), 23 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:05,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:22:05,090 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:22:05,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-09-01 08:22:05,291 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 [2023-09-01 08:22:05,291 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:22:05,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:22:05,291 INFO L85 PathProgramCache]: Analyzing trace with hash 648459223, now seen corresponding path program 3 times [2023-09-01 08:22:05,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:22:05,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50256297] [2023-09-01 08:22:05,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:22:05,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:22:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:22:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:22:06,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:22:06,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50256297] [2023-09-01 08:22:06,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50256297] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:22:06,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858718351] [2023-09-01 08:22:06,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:22:06,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:22:06,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:22:06,317 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:22:06,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 08:22:06,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 08:22:06,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:22:06,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 08:22:06,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:22:06,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:22:06,622 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 [2023-09-01 08:22:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:22:06,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:22:06,768 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1088 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1088) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ (select .cse0 (+ .cse1 c_~q~0.offset)) (select .cse0 (+ .cse1 c_~q~0.offset 4)))) 2147483648)) is different from false [2023-09-01 08:22:06,828 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:22:06,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 77 [2023-09-01 08:22:06,835 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:22:06,836 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 [2023-09-01 08:22:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:22:06,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858718351] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:22:06,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:22:06,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 24 [2023-09-01 08:22:06,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009639813] [2023-09-01 08:22:06,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:22:06,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 08:22:06,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:22:06,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 08:22:06,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=527, Unknown=1, NotChecked=46, Total=650 [2023-09-01 08:22:06,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 300 [2023-09-01 08:22:06,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 147 transitions, 1957 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) [2023-09-01 08:22:06,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:22:06,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 300 [2023-09-01 08:22:06,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:22:08,750 INFO L130 PetriNetUnfolder]: 1663/3149 cut-off events. [2023-09-01 08:22:08,750 INFO L131 PetriNetUnfolder]: For 26687/26689 co-relation queries the response was YES. [2023-09-01 08:22:08,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20081 conditions, 3149 events. 1663/3149 cut-off events. For 26687/26689 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20877 event pairs, 91 based on Foata normal form. 94/3193 useless extension candidates. Maximal degree in co-relation 20029. Up to 1122 conditions per place. [2023-09-01 08:22:08,771 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 128 selfloop transitions, 123 changer transitions 14/266 dead transitions. [2023-09-01 08:22:08,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 266 transitions, 3484 flow [2023-09-01 08:22:08,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 08:22:08,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 08:22:08,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2634 transitions. [2023-09-01 08:22:08,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3251851851851852 [2023-09-01 08:22:08,774 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2634 transitions. [2023-09-01 08:22:08,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2634 transitions. [2023-09-01 08:22:08,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:22:08,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2634 transitions. [2023-09-01 08:22:08,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 97.55555555555556) internal successors, (2634), 27 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:08,782 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) [2023-09-01 08:22:08,782 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) [2023-09-01 08:22:08,783 INFO L175 Difference]: Start difference. First operand has 158 places, 147 transitions, 1957 flow. Second operand 27 states and 2634 transitions. [2023-09-01 08:22:08,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 266 transitions, 3484 flow [2023-09-01 08:22:08,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 266 transitions, 3290 flow, removed 29 selfloop flow, removed 10 redundant places. [2023-09-01 08:22:08,878 INFO L231 Difference]: Finished difference. Result has 174 places, 164 transitions, 2271 flow [2023-09-01 08:22:08,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1752, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2271, PETRI_PLACES=174, PETRI_TRANSITIONS=164} [2023-09-01 08:22:08,878 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 143 predicate places. [2023-09-01 08:22:08,879 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 164 transitions, 2271 flow [2023-09-01 08:22:08,879 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) [2023-09-01 08:22:08,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:22:08,879 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:22:08,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-09-01 08:22:09,079 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 [2023-09-01 08:22:09,080 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:22:09,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:22:09,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1819023911, now seen corresponding path program 4 times [2023-09-01 08:22:09,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:22:09,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152305393] [2023-09-01 08:22:09,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:22:09,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:22:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:22:09,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:22:09,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:22:09,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152305393] [2023-09-01 08:22:09,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152305393] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:22:09,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891206506] [2023-09-01 08:22:09,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:22:09,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:22:09,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:22:09,597 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:22:09,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 08:22:09,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:22:09,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:22:09,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 48 conjunts are in the unsatisfiable core [2023-09-01 08:22:09,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:22:09,804 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 11 treesize of output 7 [2023-09-01 08:22:09,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:22:09,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:22:10,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:22:10,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:22:10,376 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:22:10,376 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 120 treesize of output 84 [2023-09-01 08:22:10,402 INFO L321 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-09-01 08:22:10,403 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 254 treesize of output 243 [2023-09-01 08:22:10,431 INFO L321 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-09-01 08:22:10,431 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 220 treesize of output 188 [2023-09-01 08:22:10,458 INFO L321 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-09-01 08:22:10,458 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 143 treesize of output 137 [2023-09-01 08:22:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:22:10,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891206506] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:22:10,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:22:10,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-09-01 08:22:10,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586879830] [2023-09-01 08:22:10,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:22:10,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 08:22:10,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:22:10,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 08:22:10,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=596, Unknown=3, NotChecked=0, Total=756 [2023-09-01 08:22:11,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-09-01 08:22:11,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 164 transitions, 2271 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) [2023-09-01 08:22:11,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:22:11,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-09-01 08:22:11,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:22:13,172 INFO L130 PetriNetUnfolder]: 1944/3561 cut-off events. [2023-09-01 08:22:13,172 INFO L131 PetriNetUnfolder]: For 34093/34095 co-relation queries the response was YES. [2023-09-01 08:22:13,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24000 conditions, 3561 events. 1944/3561 cut-off events. For 34093/34095 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 23379 event pairs, 536 based on Foata normal form. 46/3557 useless extension candidates. Maximal degree in co-relation 23945. Up to 3050 conditions per place. [2023-09-01 08:22:13,198 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 175 selfloop transitions, 84 changer transitions 9/269 dead transitions. [2023-09-01 08:22:13,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 269 transitions, 3760 flow [2023-09-01 08:22:13,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 08:22:13,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 08:22:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2787 transitions. [2023-09-01 08:22:13,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30966666666666665 [2023-09-01 08:22:13,202 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2787 transitions. [2023-09-01 08:22:13,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2787 transitions. [2023-09-01 08:22:13,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:22:13,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2787 transitions. [2023-09-01 08:22:13,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 92.9) internal successors, (2787), 30 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:13,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 300.0) internal successors, (9300), 31 states have internal predecessors, (9300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:13,221 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 300.0) internal successors, (9300), 31 states have internal predecessors, (9300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:13,221 INFO L175 Difference]: Start difference. First operand has 174 places, 164 transitions, 2271 flow. Second operand 30 states and 2787 transitions. [2023-09-01 08:22:13,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 269 transitions, 3760 flow [2023-09-01 08:22:13,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 269 transitions, 3343 flow, removed 115 selfloop flow, removed 18 redundant places. [2023-09-01 08:22:13,350 INFO L231 Difference]: Finished difference. Result has 185 places, 211 transitions, 2778 flow [2023-09-01 08:22:13,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=1894, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2778, PETRI_PLACES=185, PETRI_TRANSITIONS=211} [2023-09-01 08:22:13,350 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 154 predicate places. [2023-09-01 08:22:13,351 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 211 transitions, 2778 flow [2023-09-01 08:22:13,351 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) [2023-09-01 08:22:13,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:22:13,351 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:22:13,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-09-01 08:22:13,551 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 [2023-09-01 08:22:13,552 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:22:13,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:22:13,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1836348468, now seen corresponding path program 3 times [2023-09-01 08:22:13,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:22:13,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49304887] [2023-09-01 08:22:13,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:22:13,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:22:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:22:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:22:14,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:22:14,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49304887] [2023-09-01 08:22:14,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49304887] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:22:14,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419907834] [2023-09-01 08:22:14,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:22:14,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:22:14,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:22:14,424 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:22:14,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-09-01 08:22:14,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 08:22:14,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:22:14,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 08:22:14,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:22:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:22:14,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:22:14,661 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:22:14,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-09-01 08:22:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:22:14,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419907834] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:22:14,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:22:14,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 16 [2023-09-01 08:22:14,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593306644] [2023-09-01 08:22:14,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:22:14,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 08:22:14,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:22:14,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 08:22:14,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-09-01 08:22:15,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 300 [2023-09-01 08:22:15,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 211 transitions, 2778 flow. Second operand has 18 states, 18 states have (on average 109.5) internal successors, (1971), 18 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:15,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:22:15,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 300 [2023-09-01 08:22:15,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:22:16,604 INFO L130 PetriNetUnfolder]: 1667/3050 cut-off events. [2023-09-01 08:22:16,604 INFO L131 PetriNetUnfolder]: For 28405/28406 co-relation queries the response was YES. [2023-09-01 08:22:16,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20428 conditions, 3050 events. 1667/3050 cut-off events. For 28405/28406 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 19366 event pairs, 334 based on Foata normal form. 156/3172 useless extension candidates. Maximal degree in co-relation 20372. Up to 1820 conditions per place. [2023-09-01 08:22:16,627 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 139 selfloop transitions, 131 changer transitions 1/272 dead transitions. [2023-09-01 08:22:16,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 272 transitions, 3822 flow [2023-09-01 08:22:16,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 08:22:16,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 08:22:16,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2266 transitions. [2023-09-01 08:22:16,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37766666666666665 [2023-09-01 08:22:16,629 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2266 transitions. [2023-09-01 08:22:16,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2266 transitions. [2023-09-01 08:22:16,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:22:16,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2266 transitions. [2023-09-01 08:22:16,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 113.3) internal successors, (2266), 20 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:16,635 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) [2023-09-01 08:22:16,635 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) [2023-09-01 08:22:16,635 INFO L175 Difference]: Start difference. First operand has 185 places, 211 transitions, 2778 flow. Second operand 20 states and 2266 transitions. [2023-09-01 08:22:16,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 272 transitions, 3822 flow [2023-09-01 08:22:16,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 272 transitions, 3436 flow, removed 131 selfloop flow, removed 14 redundant places. [2023-09-01 08:22:16,741 INFO L231 Difference]: Finished difference. Result has 185 places, 224 transitions, 2871 flow [2023-09-01 08:22:16,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=2295, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2871, PETRI_PLACES=185, PETRI_TRANSITIONS=224} [2023-09-01 08:22:16,741 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 154 predicate places. [2023-09-01 08:22:16,742 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 224 transitions, 2871 flow [2023-09-01 08:22:16,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 109.5) internal successors, (1971), 18 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:16,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:22:16,742 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:22:16,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-09-01 08:22:16,943 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 [2023-09-01 08:22:16,943 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:22:16,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:22:16,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1836349252, now seen corresponding path program 4 times [2023-09-01 08:22:16,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:22:16,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128518335] [2023-09-01 08:22:16,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:22:16,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:22:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:22:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:22:17,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:22:17,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128518335] [2023-09-01 08:22:17,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128518335] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:22:17,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340915091] [2023-09-01 08:22:17,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:22:17,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:22:17,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:22:17,417 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) [2023-09-01 08:22:17,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-09-01 08:22:17,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:22:17,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:22:17,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 29 conjunts are in the unsatisfiable core [2023-09-01 08:22:17,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:22:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:22:17,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:22:17,829 INFO L321 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-09-01 08:22:17,830 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 [2023-09-01 08:22:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:22:17,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340915091] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:22:17,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:22:17,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 19 [2023-09-01 08:22:17,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919935007] [2023-09-01 08:22:17,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:22:17,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 08:22:17,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:22:17,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 08:22:17,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-09-01 08:22:18,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-09-01 08:22:18,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 224 transitions, 2871 flow. Second operand has 21 states, 21 states have (on average 114.52380952380952) internal successors, (2405), 21 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) [2023-09-01 08:22:18,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:22:18,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-09-01 08:22:18,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:22:20,045 INFO L130 PetriNetUnfolder]: 1717/3175 cut-off events. [2023-09-01 08:22:20,046 INFO L131 PetriNetUnfolder]: For 26338/26339 co-relation queries the response was YES. [2023-09-01 08:22:20,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20619 conditions, 3175 events. 1717/3175 cut-off events. For 26338/26339 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20677 event pairs, 337 based on Foata normal form. 76/3235 useless extension candidates. Maximal degree in co-relation 20566. Up to 2284 conditions per place. [2023-09-01 08:22:20,066 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 178 selfloop transitions, 181 changer transitions 21/381 dead transitions. [2023-09-01 08:22:20,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 381 transitions, 5147 flow [2023-09-01 08:22:20,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 08:22:20,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 08:22:20,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4116 transitions. [2023-09-01 08:22:20,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.392 [2023-09-01 08:22:20,070 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4116 transitions. [2023-09-01 08:22:20,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4116 transitions. [2023-09-01 08:22:20,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:22:20,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4116 transitions. [2023-09-01 08:22:20,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 117.6) internal successors, (4116), 35 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:20,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 300.0) internal successors, (10800), 36 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:20,083 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 300.0) internal successors, (10800), 36 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:20,083 INFO L175 Difference]: Start difference. First operand has 185 places, 224 transitions, 2871 flow. Second operand 35 states and 4116 transitions. [2023-09-01 08:22:20,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 381 transitions, 5147 flow [2023-09-01 08:22:20,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 381 transitions, 5003 flow, removed 22 selfloop flow, removed 9 redundant places. [2023-09-01 08:22:20,176 INFO L231 Difference]: Finished difference. Result has 220 places, 298 transitions, 4476 flow [2023-09-01 08:22:20,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=2740, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=4476, PETRI_PLACES=220, PETRI_TRANSITIONS=298} [2023-09-01 08:22:20,177 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 189 predicate places. [2023-09-01 08:22:20,177 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 298 transitions, 4476 flow [2023-09-01 08:22:20,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 114.52380952380952) internal successors, (2405), 21 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) [2023-09-01 08:22:20,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:22:20,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:22:20,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-09-01 08:22:20,381 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 [2023-09-01 08:22:20,381 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:22:20,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:22:20,381 INFO L85 PathProgramCache]: Analyzing trace with hash -783200165, now seen corresponding path program 5 times [2023-09-01 08:22:20,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:22:20,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192595519] [2023-09-01 08:22:20,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:22:20,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:22:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:22:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:22:20,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:22:20,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192595519] [2023-09-01 08:22:20,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192595519] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:22:20,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926762963] [2023-09-01 08:22:20,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 08:22:20,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:22:20,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:22:20,838 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) [2023-09-01 08:22:20,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-09-01 08:22:20,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:22:20,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:22:20,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 08:22:20,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:22:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:22:21,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:22:21,127 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:22:21,127 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 [2023-09-01 08:22:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:22:21,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926762963] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:22:21,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:22:21,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 18 [2023-09-01 08:22:21,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725182788] [2023-09-01 08:22:21,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:22:21,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 08:22:21,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:22:21,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 08:22:21,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2023-09-01 08:22:21,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-09-01 08:22:21,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 298 transitions, 4476 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) [2023-09-01 08:22:21,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:22:21,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-09-01 08:22:21,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:22:22,690 INFO L130 PetriNetUnfolder]: 1726/3134 cut-off events. [2023-09-01 08:22:22,690 INFO L131 PetriNetUnfolder]: For 38413/38414 co-relation queries the response was YES. [2023-09-01 08:22:22,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22420 conditions, 3134 events. 1726/3134 cut-off events. For 38413/38414 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19708 event pairs, 414 based on Foata normal form. 110/3236 useless extension candidates. Maximal degree in co-relation 22357. Up to 2049 conditions per place. [2023-09-01 08:22:22,714 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 197 selfloop transitions, 122 changer transitions 16/336 dead transitions. [2023-09-01 08:22:22,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 336 transitions, 5472 flow [2023-09-01 08:22:22,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 08:22:22,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 08:22:22,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2462 transitions. [2023-09-01 08:22:22,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3907936507936508 [2023-09-01 08:22:22,716 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2462 transitions. [2023-09-01 08:22:22,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2462 transitions. [2023-09-01 08:22:22,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:22:22,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2462 transitions. [2023-09-01 08:22:22,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 117.23809523809524) internal successors, (2462), 21 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:22,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 300.0) internal successors, (6600), 22 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:22,768 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 300.0) internal successors, (6600), 22 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:22,768 INFO L175 Difference]: Start difference. First operand has 220 places, 298 transitions, 4476 flow. Second operand 21 states and 2462 transitions. [2023-09-01 08:22:22,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 336 transitions, 5472 flow [2023-09-01 08:22:22,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 336 transitions, 5156 flow, removed 106 selfloop flow, removed 20 redundant places. [2023-09-01 08:22:22,881 INFO L231 Difference]: Finished difference. Result has 214 places, 286 transitions, 4451 flow [2023-09-01 08:22:22,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=3988, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4451, PETRI_PLACES=214, PETRI_TRANSITIONS=286} [2023-09-01 08:22:22,882 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 183 predicate places. [2023-09-01 08:22:22,882 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 286 transitions, 4451 flow [2023-09-01 08:22:22,882 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) [2023-09-01 08:22:22,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:22:22,882 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:22:22,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-09-01 08:22:23,083 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 [2023-09-01 08:22:23,083 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:22:23,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:22:23,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1440382828, now seen corresponding path program 4 times [2023-09-01 08:22:23,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:22:23,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901941168] [2023-09-01 08:22:23,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:22:23,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:22:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:22:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:22:23,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:22:23,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901941168] [2023-09-01 08:22:23,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901941168] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:22:23,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133676389] [2023-09-01 08:22:23,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:22:23,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:22:23,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:22:23,435 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) [2023-09-01 08:22:23,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-09-01 08:22:23,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:22:23,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:22:23,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 08:22:23,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:22:23,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:22:23,676 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 [2023-09-01 08:22:23,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:22:23,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 08:22:23,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:22:23,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2023-09-01 08:22:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:22:23,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:22:24,285 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:22:24,285 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 112 treesize of output 77 [2023-09-01 08:22:24,307 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:22:24,307 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 157 treesize of output 169 [2023-09-01 08:22:24,315 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 67 [2023-09-01 08:22:24,330 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:22:24,330 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 65 treesize of output 63 [2023-09-01 08:22:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:22:24,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133676389] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:22:24,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:22:24,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-09-01 08:22:24,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862404973] [2023-09-01 08:22:24,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:22:24,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 08:22:24,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:22:24,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 08:22:24,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=659, Unknown=2, NotChecked=0, Total=756 [2023-09-01 08:22:26,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-09-01 08:22:26,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 286 transitions, 4451 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) [2023-09-01 08:22:26,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:22:26,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-09-01 08:22:26,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:22:28,434 INFO L130 PetriNetUnfolder]: 1695/3076 cut-off events. [2023-09-01 08:22:28,434 INFO L131 PetriNetUnfolder]: For 34365/34365 co-relation queries the response was YES. [2023-09-01 08:22:28,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22035 conditions, 3076 events. 1695/3076 cut-off events. For 34365/34365 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 19354 event pairs, 686 based on Foata normal form. 24/3092 useless extension candidates. Maximal degree in co-relation 21971. Up to 2868 conditions per place. [2023-09-01 08:22:28,459 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 290 selfloop transitions, 23 changer transitions 14/328 dead transitions. [2023-09-01 08:22:28,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 328 transitions, 5393 flow [2023-09-01 08:22:28,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 08:22:28,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 08:22:28,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2045 transitions. [2023-09-01 08:22:28,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3098484848484849 [2023-09-01 08:22:28,462 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2045 transitions. [2023-09-01 08:22:28,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2045 transitions. [2023-09-01 08:22:28,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:22:28,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2045 transitions. [2023-09-01 08:22:28,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 92.95454545454545) internal successors, (2045), 22 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:28,469 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) [2023-09-01 08:22:28,470 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) [2023-09-01 08:22:28,470 INFO L175 Difference]: Start difference. First operand has 214 places, 286 transitions, 4451 flow. Second operand 22 states and 2045 transitions. [2023-09-01 08:22:28,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 328 transitions, 5393 flow [2023-09-01 08:22:28,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 328 transitions, 5266 flow, removed 33 selfloop flow, removed 17 redundant places. [2023-09-01 08:22:28,643 INFO L231 Difference]: Finished difference. Result has 210 places, 280 transitions, 4288 flow [2023-09-01 08:22:28,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=4292, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4288, PETRI_PLACES=210, PETRI_TRANSITIONS=280} [2023-09-01 08:22:28,644 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 179 predicate places. [2023-09-01 08:22:28,644 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 280 transitions, 4288 flow [2023-09-01 08:22:28,645 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) [2023-09-01 08:22:28,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:22:28,645 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:22:28,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-09-01 08:22:28,845 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 [2023-09-01 08:22:28,845 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:22:28,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:22:28,846 INFO L85 PathProgramCache]: Analyzing trace with hash 419811111, now seen corresponding path program 6 times [2023-09-01 08:22:28,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:22:28,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251284006] [2023-09-01 08:22:28,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:22:28,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:22:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:22:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:22:29,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:22:29,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251284006] [2023-09-01 08:22:29,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251284006] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:22:29,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561037664] [2023-09-01 08:22:29,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 08:22:29,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:22:29,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:22:29,403 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) [2023-09-01 08:22:29,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-09-01 08:22:29,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 08:22:29,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:22:29,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 08:22:29,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:22:29,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:22:29,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 08:22:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:22:29,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:22:29,860 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:22:29,861 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 [2023-09-01 08:22:29,875 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:22:29,875 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 [2023-09-01 08:22:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:22:30,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561037664] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:22:30,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:22:30,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 24 [2023-09-01 08:22:30,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460728569] [2023-09-01 08:22:30,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:22:30,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 08:22:30,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:22:30,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 08:22:30,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=570, Unknown=6, NotChecked=0, Total=650 [2023-09-01 08:22:31,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 300 [2023-09-01 08:22:31,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 280 transitions, 4288 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) [2023-09-01 08:22:31,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:22:31,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 300 [2023-09-01 08:22:31,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:22:37,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:22:40,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:22:42,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:22:43,342 INFO L130 PetriNetUnfolder]: 2035/3622 cut-off events. [2023-09-01 08:22:43,342 INFO L131 PetriNetUnfolder]: For 43933/43933 co-relation queries the response was YES. [2023-09-01 08:22:43,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25813 conditions, 3622 events. 2035/3622 cut-off events. For 43933/43933 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 22805 event pairs, 157 based on Foata normal form. 126/3740 useless extension candidates. Maximal degree in co-relation 25757. Up to 1974 conditions per place. [2023-09-01 08:22:43,376 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 148 selfloop transitions, 322 changer transitions 22/493 dead transitions. [2023-09-01 08:22:43,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 493 transitions, 7952 flow [2023-09-01 08:22:43,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-09-01 08:22:43,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-09-01 08:22:43,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3664 transitions. [2023-09-01 08:22:43,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3214035087719298 [2023-09-01 08:22:43,380 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3664 transitions. [2023-09-01 08:22:43,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3664 transitions. [2023-09-01 08:22:43,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:22:43,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3664 transitions. [2023-09-01 08:22:43,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 96.42105263157895) internal successors, (3664), 38 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:43,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 300.0) internal successors, (11700), 39 states have internal predecessors, (11700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:43,394 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 300.0) internal successors, (11700), 39 states have internal predecessors, (11700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:43,395 INFO L175 Difference]: Start difference. First operand has 210 places, 280 transitions, 4288 flow. Second operand 38 states and 3664 transitions. [2023-09-01 08:22:43,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 493 transitions, 7952 flow [2023-09-01 08:22:43,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 493 transitions, 7839 flow, removed 32 selfloop flow, removed 15 redundant places. [2023-09-01 08:22:43,584 INFO L231 Difference]: Finished difference. Result has 234 places, 415 transitions, 7404 flow [2023-09-01 08:22:43,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=4154, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=7404, PETRI_PLACES=234, PETRI_TRANSITIONS=415} [2023-09-01 08:22:43,585 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 203 predicate places. [2023-09-01 08:22:43,585 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 415 transitions, 7404 flow [2023-09-01 08:22:43,586 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) [2023-09-01 08:22:43,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:22:43,586 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:22:43,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-09-01 08:22:43,786 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 [2023-09-01 08:22:43,787 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:22:43,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:22:43,787 INFO L85 PathProgramCache]: Analyzing trace with hash -124527907, now seen corresponding path program 3 times [2023-09-01 08:22:43,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:22:43,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398271487] [2023-09-01 08:22:43,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:22:43,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:22:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:22:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:22:44,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:22:44,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398271487] [2023-09-01 08:22:44,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398271487] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:22:44,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497817940] [2023-09-01 08:22:44,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:22:44,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:22:44,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:22:44,580 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) [2023-09-01 08:22:44,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-09-01 08:22:44,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 08:22:44,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:22:44,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 08:22:44,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:22:44,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:22:44,786 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 [2023-09-01 08:22:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:22:44,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:22:44,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:22:44,924 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 [2023-09-01 08:22:44,932 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 [2023-09-01 08:22:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:22:45,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497817940] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:22:45,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:22:45,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 22 [2023-09-01 08:22:45,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420324918] [2023-09-01 08:22:45,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:22:45,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 08:22:45,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:22:45,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 08:22:45,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=481, Unknown=4, NotChecked=0, Total=552 [2023-09-01 08:22:46,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-09-01 08:22:46,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 415 transitions, 7404 flow. Second operand has 24 states, 24 states have (on average 90.45833333333333) internal successors, (2171), 24 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:46,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:22:46,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-09-01 08:22:46,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:22:46,622 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset 4))) (and (< 0 (+ (select (select |c_#memory_int| c_~q~0.base) .cse0) 1)) (forall ((v_ArrVal_1350 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1350) c_~q~0.base) .cse0) 1))))) is different from false [2023-09-01 08:22:47,739 INFO L130 PetriNetUnfolder]: 2467/4346 cut-off events. [2023-09-01 08:22:47,739 INFO L131 PetriNetUnfolder]: For 64180/64180 co-relation queries the response was YES. [2023-09-01 08:22:47,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35969 conditions, 4346 events. 2467/4346 cut-off events. For 64180/64180 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 28179 event pairs, 188 based on Foata normal form. 38/4376 useless extension candidates. Maximal degree in co-relation 35902. Up to 2425 conditions per place. [2023-09-01 08:22:47,778 INFO L137 encePairwiseOnDemand]: 288/300 looper letters, 347 selfloop transitions, 260 changer transitions 23/631 dead transitions. [2023-09-01 08:22:47,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 631 transitions, 11926 flow [2023-09-01 08:22:47,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 08:22:47,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 08:22:47,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2174 transitions. [2023-09-01 08:22:47,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31507246376811593 [2023-09-01 08:22:47,781 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2174 transitions. [2023-09-01 08:22:47,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2174 transitions. [2023-09-01 08:22:47,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:22:47,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2174 transitions. [2023-09-01 08:22:47,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 94.52173913043478) internal successors, (2174), 23 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:47,786 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) [2023-09-01 08:22:47,787 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) [2023-09-01 08:22:47,787 INFO L175 Difference]: Start difference. First operand has 234 places, 415 transitions, 7404 flow. Second operand 23 states and 2174 transitions. [2023-09-01 08:22:47,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 631 transitions, 11926 flow [2023-09-01 08:22:48,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 631 transitions, 10089 flow, removed 731 selfloop flow, removed 20 redundant places. [2023-09-01 08:22:48,144 INFO L231 Difference]: Finished difference. Result has 233 places, 490 transitions, 8250 flow [2023-09-01 08:22:48,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=6240, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8250, PETRI_PLACES=233, PETRI_TRANSITIONS=490} [2023-09-01 08:22:48,145 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 202 predicate places. [2023-09-01 08:22:48,145 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 490 transitions, 8250 flow [2023-09-01 08:22:48,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 90.45833333333333) internal successors, (2171), 24 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:48,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:22:48,146 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:22:48,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-09-01 08:22:48,346 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 [2023-09-01 08:22:48,346 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:22:48,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:22:48,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1702197031, now seen corresponding path program 7 times [2023-09-01 08:22:48,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:22:48,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274121743] [2023-09-01 08:22:48,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:22:48,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:22:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:22:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 08:22:48,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:22:48,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274121743] [2023-09-01 08:22:48,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274121743] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:22:48,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335967082] [2023-09-01 08:22:48,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 08:22:48,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:22:48,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:22:48,445 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) [2023-09-01 08:22:48,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-09-01 08:22:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:22:48,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 08:22:48,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:22:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:22:48,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:22:48,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:22:48,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335967082] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:22:48,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:22:48,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 18 [2023-09-01 08:22:48,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232145896] [2023-09-01 08:22:48,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:22:48,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 08:22:48,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:22:48,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 08:22:48,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2023-09-01 08:22:48,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 300 [2023-09-01 08:22:48,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 490 transitions, 8250 flow. Second operand has 20 states, 20 states have (on average 121.9) internal successors, (2438), 20 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:48,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:22:48,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 300 [2023-09-01 08:22:48,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:22:50,069 INFO L130 PetriNetUnfolder]: 2781/4940 cut-off events. [2023-09-01 08:22:50,070 INFO L131 PetriNetUnfolder]: For 71934/71934 co-relation queries the response was YES. [2023-09-01 08:22:50,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39601 conditions, 4940 events. 2781/4940 cut-off events. For 71934/71934 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 33306 event pairs, 306 based on Foata normal form. 112/5042 useless extension candidates. Maximal degree in co-relation 39535. Up to 3320 conditions per place. [2023-09-01 08:22:50,110 INFO L137 encePairwiseOnDemand]: 292/300 looper letters, 248 selfloop transitions, 322 changer transitions 12/583 dead transitions. [2023-09-01 08:22:50,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 583 transitions, 10834 flow [2023-09-01 08:22:50,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 08:22:50,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 08:22:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1625 transitions. [2023-09-01 08:22:50,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-09-01 08:22:50,113 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1625 transitions. [2023-09-01 08:22:50,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1625 transitions. [2023-09-01 08:22:50,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:22:50,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1625 transitions. [2023-09-01 08:22:50,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 125.0) internal successors, (1625), 13 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:50,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 300.0) internal successors, (4200), 14 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:50,118 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 300.0) internal successors, (4200), 14 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:50,118 INFO L175 Difference]: Start difference. First operand has 233 places, 490 transitions, 8250 flow. Second operand 13 states and 1625 transitions. [2023-09-01 08:22:50,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 583 transitions, 10834 flow [2023-09-01 08:22:50,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 583 transitions, 10161 flow, removed 120 selfloop flow, removed 20 redundant places. [2023-09-01 08:22:50,480 INFO L231 Difference]: Finished difference. Result has 219 places, 557 transitions, 10178 flow [2023-09-01 08:22:50,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=7649, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10178, PETRI_PLACES=219, PETRI_TRANSITIONS=557} [2023-09-01 08:22:50,480 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 188 predicate places. [2023-09-01 08:22:50,481 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 557 transitions, 10178 flow [2023-09-01 08:22:50,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 121.9) internal successors, (2438), 20 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:50,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:22:50,481 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:22:50,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-09-01 08:22:50,682 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 [2023-09-01 08:22:50,682 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:22:50,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:22:50,682 INFO L85 PathProgramCache]: Analyzing trace with hash 520543201, now seen corresponding path program 1 times [2023-09-01 08:22:50,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:22:50,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335198589] [2023-09-01 08:22:50,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:22:50,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:22:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:22:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:22:51,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:22:51,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335198589] [2023-09-01 08:22:51,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335198589] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:22:51,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917593834] [2023-09-01 08:22:51,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:22:51,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:22:51,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:22:51,920 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) [2023-09-01 08:22:51,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-09-01 08:22:52,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:22:52,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 08:22:52,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:22:52,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:22:52,187 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 [2023-09-01 08:22:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:22:52,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:22:52,438 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1427 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1427) 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 [2023-09-01 08:22:52,473 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:22:52,473 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 [2023-09-01 08:22:52,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:22:52,489 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 [2023-09-01 08:22:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:22:52,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917593834] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:22:52,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:22:52,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 28 [2023-09-01 08:22:52,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842114493] [2023-09-01 08:22:52,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:22:52,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 08:22:52,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:22:52,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 08:22:52,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=728, Unknown=1, NotChecked=54, Total=870 [2023-09-01 08:22:52,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 300 [2023-09-01 08:22:52,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 557 transitions, 10178 flow. Second operand has 30 states, 30 states have (on average 93.4) internal successors, (2802), 30 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:52,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:22:52,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 300 [2023-09-01 08:22:52,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:22:55,158 INFO L130 PetriNetUnfolder]: 3250/5756 cut-off events. [2023-09-01 08:22:55,158 INFO L131 PetriNetUnfolder]: For 87049/87049 co-relation queries the response was YES. [2023-09-01 08:22:55,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47763 conditions, 5756 events. 3250/5756 cut-off events. For 87049/87049 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 39981 event pairs, 295 based on Foata normal form. 52/5716 useless extension candidates. Maximal degree in co-relation 47698. Up to 3895 conditions per place. [2023-09-01 08:22:55,204 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 374 selfloop transitions, 379 changer transitions 0/754 dead transitions. [2023-09-01 08:22:55,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 754 transitions, 14586 flow [2023-09-01 08:22:55,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 08:22:55,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 08:22:55,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2324 transitions. [2023-09-01 08:22:55,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3227777777777778 [2023-09-01 08:22:55,207 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2324 transitions. [2023-09-01 08:22:55,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2324 transitions. [2023-09-01 08:22:55,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:22:55,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2324 transitions. [2023-09-01 08:22:55,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 96.83333333333333) internal successors, (2324), 24 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:55,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 300.0) internal successors, (7500), 25 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:55,216 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 300.0) internal successors, (7500), 25 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:55,216 INFO L175 Difference]: Start difference. First operand has 219 places, 557 transitions, 10178 flow. Second operand 24 states and 2324 transitions. [2023-09-01 08:22:55,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 754 transitions, 14586 flow [2023-09-01 08:22:55,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 754 transitions, 14035 flow, removed 270 selfloop flow, removed 7 redundant places. [2023-09-01 08:22:55,807 INFO L231 Difference]: Finished difference. Result has 226 places, 649 transitions, 12691 flow [2023-09-01 08:22:55,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=9785, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=12691, PETRI_PLACES=226, PETRI_TRANSITIONS=649} [2023-09-01 08:22:55,807 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 195 predicate places. [2023-09-01 08:22:55,808 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 649 transitions, 12691 flow [2023-09-01 08:22:55,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 93.4) internal successors, (2802), 30 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:55,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:22:55,808 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:22:55,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-09-01 08:22:56,008 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 [2023-09-01 08:22:56,009 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:22:56,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:22:56,009 INFO L85 PathProgramCache]: Analyzing trace with hash -340155782, now seen corresponding path program 5 times [2023-09-01 08:22:56,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:22:56,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73785453] [2023-09-01 08:22:56,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:22:56,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:22:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:22:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:22:56,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:22:56,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73785453] [2023-09-01 08:22:56,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73785453] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:22:56,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013589242] [2023-09-01 08:22:56,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 08:22:56,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:22:56,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:22:56,389 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) [2023-09-01 08:22:56,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-09-01 08:22:56,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 08:22:56,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:22:56,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 08:22:56,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:22:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:22:56,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:22:56,739 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 08:22:56,739 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 [2023-09-01 08:22:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:22:56,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013589242] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:22:56,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:22:56,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 21 [2023-09-01 08:22:56,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954791355] [2023-09-01 08:22:56,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:22:56,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 08:22:56,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:22:56,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 08:22:56,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2023-09-01 08:22:57,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-09-01 08:22:57,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 649 transitions, 12691 flow. Second operand has 23 states, 23 states have (on average 114.56521739130434) internal successors, (2635), 23 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:57,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:22:57,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-09-01 08:22:57,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:22:59,483 INFO L130 PetriNetUnfolder]: 3665/6612 cut-off events. [2023-09-01 08:22:59,484 INFO L131 PetriNetUnfolder]: For 89551/89551 co-relation queries the response was YES. [2023-09-01 08:22:59,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52740 conditions, 6612 events. 3665/6612 cut-off events. For 89551/89551 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 48449 event pairs, 209 based on Foata normal form. 64/6536 useless extension candidates. Maximal degree in co-relation 52672. Up to 3056 conditions per place. [2023-09-01 08:22:59,551 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 314 selfloop transitions, 561 changer transitions 0/876 dead transitions. [2023-09-01 08:22:59,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 876 transitions, 17430 flow [2023-09-01 08:22:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 08:22:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 08:22:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2871 transitions. [2023-09-01 08:22:59,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39875 [2023-09-01 08:22:59,554 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2871 transitions. [2023-09-01 08:22:59,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2871 transitions. [2023-09-01 08:22:59,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:22:59,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2871 transitions. [2023-09-01 08:22:59,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 119.625) internal successors, (2871), 24 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:59,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 300.0) internal successors, (7500), 25 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:59,561 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 300.0) internal successors, (7500), 25 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:59,561 INFO L175 Difference]: Start difference. First operand has 226 places, 649 transitions, 12691 flow. Second operand 24 states and 2871 transitions. [2023-09-01 08:22:59,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 876 transitions, 17430 flow [2023-09-01 08:23:00,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 876 transitions, 17001 flow, removed 171 selfloop flow, removed 8 redundant places. [2023-09-01 08:23:00,164 INFO L231 Difference]: Finished difference. Result has 246 places, 808 transitions, 16434 flow [2023-09-01 08:23:00,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=12354, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=416, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=16434, PETRI_PLACES=246, PETRI_TRANSITIONS=808} [2023-09-01 08:23:00,165 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 215 predicate places. [2023-09-01 08:23:00,165 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 808 transitions, 16434 flow [2023-09-01 08:23:00,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 114.56521739130434) internal successors, (2635), 23 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:00,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:23:00,166 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:23:00,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-09-01 08:23:00,366 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 [2023-09-01 08:23:00,367 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:23:00,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:23:00,367 INFO L85 PathProgramCache]: Analyzing trace with hash -423938645, now seen corresponding path program 8 times [2023-09-01 08:23:00,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:23:00,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163174485] [2023-09-01 08:23:00,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:00,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:23:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:01,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:23:01,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163174485] [2023-09-01 08:23:01,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163174485] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:23:01,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144864081] [2023-09-01 08:23:01,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:23:01,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:23:01,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:23:01,284 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) [2023-09-01 08:23:01,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-09-01 08:23:01,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:23:01,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:23:01,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 65 conjunts are in the unsatisfiable core [2023-09-01 08:23:01,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:23:01,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:23:01,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:23:01,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 08:23:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:01,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:23:02,733 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:23:02,733 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 178 treesize of output 118 [2023-09-01 08:23:02,816 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-09-01 08:23:02,817 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 360 treesize of output 393 [2023-09-01 08:23:02,900 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-09-01 08:23:02,901 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 309 treesize of output 315 [2023-09-01 08:23:02,994 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-09-01 08:23:02,994 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 204 treesize of output 249 [2023-09-01 08:23:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:10,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144864081] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:23:10,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:23:10,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-09-01 08:23:10,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75149998] [2023-09-01 08:23:10,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:23:10,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 08:23:10,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:23:10,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 08:23:10,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1198, Unknown=1, NotChecked=0, Total=1406 [2023-09-01 08:23:12,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 300 [2023-09-01 08:23:12,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 808 transitions, 16434 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) [2023-09-01 08:23:12,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:23:12,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 300 [2023-09-01 08:23:12,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:23:14,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:23:32,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:23:35,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:23:39,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 08:23:39,937 INFO L130 PetriNetUnfolder]: 5242/9402 cut-off events. [2023-09-01 08:23:39,937 INFO L131 PetriNetUnfolder]: For 141631/141631 co-relation queries the response was YES. [2023-09-01 08:23:39,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77096 conditions, 9402 events. 5242/9402 cut-off events. For 141631/141631 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 71582 event pairs, 829 based on Foata normal form. 319/9226 useless extension candidates. Maximal degree in co-relation 77022. Up to 5393 conditions per place. [2023-09-01 08:23:40,026 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 873 selfloop transitions, 814 changer transitions 6/1694 dead transitions. [2023-09-01 08:23:40,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 1694 transitions, 32328 flow [2023-09-01 08:23:40,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-09-01 08:23:40,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2023-09-01 08:23:40,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 10275 transitions. [2023-09-01 08:23:40,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31422018348623854 [2023-09-01 08:23:40,035 INFO L72 ComplementDD]: Start complementDD. Operand 109 states and 10275 transitions. [2023-09-01 08:23:40,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 109 states and 10275 transitions. [2023-09-01 08:23:40,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:23:40,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 109 states and 10275 transitions. [2023-09-01 08:23:40,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 110 states, 109 states have (on average 94.26605504587155) internal successors, (10275), 109 states have internal predecessors, (10275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:40,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 110 states, 110 states have (on average 300.0) internal successors, (33000), 110 states have internal predecessors, (33000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:40,068 INFO L81 ComplementDD]: Finished complementDD. Result has 110 states, 110 states have (on average 300.0) internal successors, (33000), 110 states have internal predecessors, (33000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:40,069 INFO L175 Difference]: Start difference. First operand has 246 places, 808 transitions, 16434 flow. Second operand 109 states and 10275 transitions. [2023-09-01 08:23:40,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 1694 transitions, 32328 flow [2023-09-01 08:23:41,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 1694 transitions, 29837 flow, removed 648 selfloop flow, removed 9 redundant places. [2023-09-01 08:23:41,302 INFO L231 Difference]: Finished difference. Result has 372 places, 1473 transitions, 28182 flow [2023-09-01 08:23:41,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=14907, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=109, PETRI_FLOW=28182, PETRI_PLACES=372, PETRI_TRANSITIONS=1473} [2023-09-01 08:23:41,304 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 341 predicate places. [2023-09-01 08:23:41,304 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 1473 transitions, 28182 flow [2023-09-01 08:23:41,305 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) [2023-09-01 08:23:41,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:23:41,305 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:23:41,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-09-01 08:23:41,510 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 [2023-09-01 08:23:41,510 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:23:41,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:23:41,511 INFO L85 PathProgramCache]: Analyzing trace with hash 518621421, now seen corresponding path program 4 times [2023-09-01 08:23:41,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:23:41,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949224979] [2023-09-01 08:23:41,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:41,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:23:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:42,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:42,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:23:42,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949224979] [2023-09-01 08:23:42,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949224979] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:23:42,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763792956] [2023-09-01 08:23:42,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:23:42,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:23:42,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:23:42,312 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) [2023-09-01 08:23:42,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-09-01 08:23:42,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:23:42,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:23:42,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 08:23:42,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:23:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 08:23:42,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:23:42,570 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 08:23:42,570 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 27 treesize of output 15 [2023-09-01 08:23:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 08:23:42,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763792956] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:23:42,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:23:42,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 5] total 19 [2023-09-01 08:23:42,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852633215] [2023-09-01 08:23:42,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:23:42,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 08:23:42,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:23:42,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 08:23:42,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2023-09-01 08:23:43,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-09-01 08:23:43,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 1473 transitions, 28182 flow. Second operand has 21 states, 21 states have (on average 114.57142857142857) internal successors, (2406), 21 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:43,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:23:43,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-09-01 08:23:43,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:23:49,300 INFO L130 PetriNetUnfolder]: 5942/10827 cut-off events. [2023-09-01 08:23:49,300 INFO L131 PetriNetUnfolder]: For 161255/161255 co-relation queries the response was YES. [2023-09-01 08:23:49,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89955 conditions, 10827 events. 5942/10827 cut-off events. For 161255/161255 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 86581 event pairs, 192 based on Foata normal form. 476/10962 useless extension candidates. Maximal degree in co-relation 89854. Up to 3574 conditions per place. [2023-09-01 08:23:49,395 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 528 selfloop transitions, 1366 changer transitions 110/2005 dead transitions. [2023-09-01 08:23:49,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 2005 transitions, 40531 flow [2023-09-01 08:23:49,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-09-01 08:23:49,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-09-01 08:23:49,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 6667 transitions. [2023-09-01 08:23:49,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968452380952381 [2023-09-01 08:23:49,399 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 6667 transitions. [2023-09-01 08:23:49,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 6667 transitions. [2023-09-01 08:23:49,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:23:49,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 6667 transitions. [2023-09-01 08:23:49,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 119.05357142857143) internal successors, (6667), 56 states have internal predecessors, (6667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:49,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 300.0) internal successors, (17100), 57 states have internal predecessors, (17100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:49,411 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 300.0) internal successors, (17100), 57 states have internal predecessors, (17100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:49,411 INFO L175 Difference]: Start difference. First operand has 372 places, 1473 transitions, 28182 flow. Second operand 56 states and 6667 transitions. [2023-09-01 08:23:49,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 2005 transitions, 40531 flow [2023-09-01 08:23:51,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 2005 transitions, 32800 flow, removed 3823 selfloop flow, removed 14 redundant places. [2023-09-01 08:23:51,577 INFO L231 Difference]: Finished difference. Result has 436 places, 1704 transitions, 30535 flow [2023-09-01 08:23:51,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=21908, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1024, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=30535, PETRI_PLACES=436, PETRI_TRANSITIONS=1704} [2023-09-01 08:23:51,578 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 405 predicate places. [2023-09-01 08:23:51,578 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 1704 transitions, 30535 flow [2023-09-01 08:23:51,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 114.57142857142857) internal successors, (2406), 21 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:51,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:23:51,578 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:23:51,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-09-01 08:23:51,779 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 [2023-09-01 08:23:51,779 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:23:51,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:23:51,779 INFO L85 PathProgramCache]: Analyzing trace with hash -424166455, now seen corresponding path program 5 times [2023-09-01 08:23:51,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:23:51,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578667344] [2023-09-01 08:23:51,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:23:51,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:23:51,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:23:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:52,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:23:52,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578667344] [2023-09-01 08:23:52,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578667344] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:23:52,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244613955] [2023-09-01 08:23:52,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 08:23:52,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:23:52,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:23:52,723 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) [2023-09-01 08:23:52,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-09-01 08:23:52,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 08:23:52,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:23:52,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 08:23:52,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:23:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:53,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:23:53,166 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 08:23:53,167 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 [2023-09-01 08:23:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:23:53,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244613955] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:23:53,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:23:53,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 32 [2023-09-01 08:23:53,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103364919] [2023-09-01 08:23:53,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:23:53,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-09-01 08:23:53,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:23:53,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-09-01 08:23:53,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2023-09-01 08:23:54,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 300 [2023-09-01 08:23:54,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 1704 transitions, 30535 flow. Second operand has 34 states, 34 states have (on average 107.32352941176471) internal successors, (3649), 34 states have internal predecessors, (3649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:23:54,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:23:54,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 300 [2023-09-01 08:23:54,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:24:03,675 INFO L130 PetriNetUnfolder]: 6491/11815 cut-off events. [2023-09-01 08:24:03,676 INFO L131 PetriNetUnfolder]: For 186363/186363 co-relation queries the response was YES. [2023-09-01 08:24:03,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97125 conditions, 11815 events. 6491/11815 cut-off events. For 186363/186363 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 91536 event pairs, 188 based on Foata normal form. 411/11859 useless extension candidates. Maximal degree in co-relation 97003. Up to 3873 conditions per place. [2023-09-01 08:24:03,810 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 511 selfloop transitions, 1634 changer transitions 132/2278 dead transitions. [2023-09-01 08:24:03,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 2278 transitions, 42364 flow [2023-09-01 08:24:03,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-09-01 08:24:03,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-09-01 08:24:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 7300 transitions. [2023-09-01 08:24:03,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37435897435897436 [2023-09-01 08:24:03,815 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 7300 transitions. [2023-09-01 08:24:03,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 7300 transitions. [2023-09-01 08:24:03,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:24:03,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 7300 transitions. [2023-09-01 08:24:03,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 112.3076923076923) internal successors, (7300), 65 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:03,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 300.0) internal successors, (19800), 66 states have internal predecessors, (19800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:03,832 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 300.0) internal successors, (19800), 66 states have internal predecessors, (19800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:03,832 INFO L175 Difference]: Start difference. First operand has 436 places, 1704 transitions, 30535 flow. Second operand 65 states and 7300 transitions. [2023-09-01 08:24:03,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 2278 transitions, 42364 flow [2023-09-01 08:24:06,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 2278 transitions, 39082 flow, removed 1417 selfloop flow, removed 27 redundant places. [2023-09-01 08:24:06,410 INFO L231 Difference]: Finished difference. Result has 478 places, 1929 transitions, 37128 flow [2023-09-01 08:24:06,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=24069, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=37128, PETRI_PLACES=478, PETRI_TRANSITIONS=1929} [2023-09-01 08:24:06,412 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 447 predicate places. [2023-09-01 08:24:06,412 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 1929 transitions, 37128 flow [2023-09-01 08:24:06,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 107.32352941176471) internal successors, (3649), 34 states have internal predecessors, (3649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:06,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:24:06,413 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:24:06,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-09-01 08:24:06,618 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 [2023-09-01 08:24:06,619 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:24:06,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:24:06,619 INFO L85 PathProgramCache]: Analyzing trace with hash -423362045, now seen corresponding path program 9 times [2023-09-01 08:24:06,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:24:06,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987899071] [2023-09-01 08:24:06,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:24:06,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:24:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:24:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:24:07,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:24:07,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987899071] [2023-09-01 08:24:07,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987899071] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:24:07,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890138517] [2023-09-01 08:24:07,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:24:07,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:24:07,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:24:07,274 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) [2023-09-01 08:24:07,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-09-01 08:24:07,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 08:24:07,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:24:07,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 08:24:07,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:24:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:24:07,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:24:07,860 INFO L321 Elim1Store]: treesize reduction 21, result has 75.3 percent of original size [2023-09-01 08:24:07,861 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 [2023-09-01 08:24:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:24:07,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890138517] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:24:07,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:24:07,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 24 [2023-09-01 08:24:07,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901982046] [2023-09-01 08:24:07,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:24:07,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 08:24:07,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:24:07,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 08:24:07,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2023-09-01 08:24:09,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 300 [2023-09-01 08:24:09,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 1929 transitions, 37128 flow. Second operand has 26 states, 26 states have (on average 114.34615384615384) internal successors, (2973), 26 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:09,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:24:09,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 300 [2023-09-01 08:24:09,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:24:16,163 INFO L130 PetriNetUnfolder]: 6635/11997 cut-off events. [2023-09-01 08:24:16,163 INFO L131 PetriNetUnfolder]: For 207212/207212 co-relation queries the response was YES. [2023-09-01 08:24:16,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105485 conditions, 11997 events. 6635/11997 cut-off events. For 207212/207212 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 92572 event pairs, 960 based on Foata normal form. 22/11651 useless extension candidates. Maximal degree in co-relation 105357. Up to 9295 conditions per place. [2023-09-01 08:24:16,305 INFO L137 encePairwiseOnDemand]: 290/300 looper letters, 1453 selfloop transitions, 761 changer transitions 5/2220 dead transitions. [2023-09-01 08:24:16,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 2220 transitions, 46493 flow [2023-09-01 08:24:16,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-09-01 08:24:16,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-09-01 08:24:16,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 5062 transitions. [2023-09-01 08:24:16,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924031007751938 [2023-09-01 08:24:16,310 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 5062 transitions. [2023-09-01 08:24:16,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 5062 transitions. [2023-09-01 08:24:16,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:24:16,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 5062 transitions. [2023-09-01 08:24:16,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 117.72093023255815) internal successors, (5062), 43 states have internal predecessors, (5062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:16,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 300.0) internal successors, (13200), 44 states have internal predecessors, (13200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:16,320 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 300.0) internal successors, (13200), 44 states have internal predecessors, (13200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:16,320 INFO L175 Difference]: Start difference. First operand has 478 places, 1929 transitions, 37128 flow. Second operand 43 states and 5062 transitions. [2023-09-01 08:24:16,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 2220 transitions, 46493 flow [2023-09-01 08:24:21,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 2220 transitions, 41834 flow, removed 2002 selfloop flow, removed 26 redundant places. [2023-09-01 08:24:21,070 INFO L231 Difference]: Finished difference. Result has 499 places, 2103 transitions, 39228 flow [2023-09-01 08:24:21,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=32863, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1927, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=596, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=39228, PETRI_PLACES=499, PETRI_TRANSITIONS=2103} [2023-09-01 08:24:21,072 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 468 predicate places. [2023-09-01 08:24:21,072 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 2103 transitions, 39228 flow [2023-09-01 08:24:21,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 114.34615384615384) internal successors, (2973), 26 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:21,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:24:21,072 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:24:21,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-09-01 08:24:21,272 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 [2023-09-01 08:24:21,273 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:24:21,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:24:21,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1864888131, now seen corresponding path program 10 times [2023-09-01 08:24:21,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:24:21,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362823096] [2023-09-01 08:24:21,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:24:21,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:24:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:24:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:24:22,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:24:22,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362823096] [2023-09-01 08:24:22,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362823096] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:24:22,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770372207] [2023-09-01 08:24:22,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:24:22,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:24:22,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:24:22,136 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) [2023-09-01 08:24:22,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-09-01 08:24:22,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:24:22,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:24:22,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 40 conjunts are in the unsatisfiable core [2023-09-01 08:24:22,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:24:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:24:22,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:24:22,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:24:22,651 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 72 treesize of output 104 [2023-09-01 08:24:22,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 08:24:22,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770372207] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:24:22,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:24:22,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 27 [2023-09-01 08:24:22,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944059292] [2023-09-01 08:24:22,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:24:22,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 08:24:22,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:24:22,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 08:24:22,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2023-09-01 08:24:24,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 300 [2023-09-01 08:24:24,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 2103 transitions, 39228 flow. Second operand has 29 states, 29 states have (on average 109.3103448275862) internal successors, (3170), 29 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:24,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:24:24,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 300 [2023-09-01 08:24:24,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:24:32,022 INFO L130 PetriNetUnfolder]: 6770/12256 cut-off events. [2023-09-01 08:24:32,022 INFO L131 PetriNetUnfolder]: For 165977/165977 co-relation queries the response was YES. [2023-09-01 08:24:32,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100916 conditions, 12256 events. 6770/12256 cut-off events. For 165977/165977 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 94888 event pairs, 1105 based on Foata normal form. 76/11910 useless extension candidates. Maximal degree in co-relation 100786. Up to 10275 conditions per place. [2023-09-01 08:24:32,153 INFO L137 encePairwiseOnDemand]: 291/300 looper letters, 1904 selfloop transitions, 354 changer transitions 14/2273 dead transitions. [2023-09-01 08:24:32,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 2273 transitions, 45572 flow [2023-09-01 08:24:32,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-09-01 08:24:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-09-01 08:24:32,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4376 transitions. [2023-09-01 08:24:32,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37401709401709404 [2023-09-01 08:24:32,157 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4376 transitions. [2023-09-01 08:24:32,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4376 transitions. [2023-09-01 08:24:32,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:24:32,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4376 transitions. [2023-09-01 08:24:32,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 112.2051282051282) internal successors, (4376), 39 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:32,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 300.0) internal successors, (12000), 40 states have internal predecessors, (12000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:32,166 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 300.0) internal successors, (12000), 40 states have internal predecessors, (12000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:32,166 INFO L175 Difference]: Start difference. First operand has 499 places, 2103 transitions, 39228 flow. Second operand 39 states and 4376 transitions. [2023-09-01 08:24:32,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 2273 transitions, 45572 flow [2023-09-01 08:24:35,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 2273 transitions, 45209 flow, removed 145 selfloop flow, removed 16 redundant places. [2023-09-01 08:24:35,283 INFO L231 Difference]: Finished difference. Result has 528 places, 2143 transitions, 40460 flow [2023-09-01 08:24:35,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=38858, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1747, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=40460, PETRI_PLACES=528, PETRI_TRANSITIONS=2143} [2023-09-01 08:24:35,286 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 497 predicate places. [2023-09-01 08:24:35,286 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 2143 transitions, 40460 flow [2023-09-01 08:24:35,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 109.3103448275862) internal successors, (3170), 29 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:24:35,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:24:35,286 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:24:35,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-09-01 08:24:35,487 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 [2023-09-01 08:24:35,487 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-09-01 08:24:35,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:24:35,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2042562075, now seen corresponding path program 6 times [2023-09-01 08:24:35,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:24:35,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662538549] [2023-09-01 08:24:35,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:24:35,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:24:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:24:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:24:36,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:24:36,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662538549] [2023-09-01 08:24:36,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662538549] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:24:36,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720432903] [2023-09-01 08:24:36,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 08:24:36,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:24:36,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:24:36,218 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) [2023-09-01 08:24:36,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-09-01 08:24:36,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 08:24:36,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:24:36,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 70 conjunts are in the unsatisfiable core [2023-09-01 08:24:36,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:24:36,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 08:24:36,493 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 [2023-09-01 08:24:36,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:24:36,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 08:24:36,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 08:24:36,647 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 [2023-09-01 08:24:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:24:36,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:24:38,458 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 08:24:38,458 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 505 treesize of output 305 [2023-09-01 08:24:38,476 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 829 treesize of output 794 [2023-09-01 08:24:38,650 INFO L321 Elim1Store]: treesize reduction 20, result has 83.2 percent of original size [2023-09-01 08:24:38,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1064 treesize of output 1044 [2023-09-01 08:24:38,811 INFO L321 Elim1Store]: treesize reduction 20, result has 73.3 percent of original size [2023-09-01 08:24:38,812 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 630 treesize of output 640 [2023-09-01 08:24:38,898 INFO L321 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2023-09-01 08:24:38,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 585 treesize of output 536 [2023-09-01 08:24:39,060 INFO L321 Elim1Store]: treesize reduction 20, result has 83.2 percent of original size [2023-09-01 08:24:39,060 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 593 treesize of output 617 [2023-09-01 08:24:39,154 INFO L321 Elim1Store]: treesize reduction 20, result has 73.3 percent of original size [2023-09-01 08:24:39,154 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 469 treesize of output 486 [2023-09-01 08:24:39,233 INFO L321 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2023-09-01 08:24:39,233 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 431 treesize of output 396 Killed by 15