./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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-figure1-alt.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 fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 15:25:36,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 15:25:36,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 15:25:36,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 15:25:36,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 15:25:36,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 15:25:36,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 15:25:36,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 15:25:36,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 15:25:36,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 15:25:36,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 15:25:36,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 15:25:36,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 15:25:36,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 15:25:36,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 15:25:36,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 15:25:36,463 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 15:25:36,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 15:25:36,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 15:25:36,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 15:25:36,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 15:25:36,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 15:25:36,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 15:25:36,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 15:25:36,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 15:25:36,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 15:25:36,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 15:25:36,499 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 15:25:36,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 15:25:36,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 15:25:36,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 15:25:36,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 15:25:36,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 15:25:36,504 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 15:25:36,505 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 15:25:36,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 15:25:36,506 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 15:25:36,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 15:25:36,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 15:25:36,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 15:25:36,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 15:25:36,509 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-08-30 15:25:36,542 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 15:25:36,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 15:25:36,543 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 15:25:36,543 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 15:25:36,544 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 15:25:36,544 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 15:25:36,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 15:25:36,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 15:25:36,545 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 15:25:36,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 15:25:36,546 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 15:25:36,546 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 15:25:36,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 15:25:36,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 15:25:36,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 15:25:36,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 15:25:36,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 15:25:36,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 15:25:36,548 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-08-30 15:25:36,548 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 15:25:36,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 15:25:36,548 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 15:25:36,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 15:25:36,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 15:25:36,549 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 15:25:36,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 15:25:36,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:25:36,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 15:25:36,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 15:25:36,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 15:25:36,550 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 15:25:36,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 15:25:36,551 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 15:25:36,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 15:25:36,551 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 15:25:36,551 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 15:25:36,551 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 15:25:36,552 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 15:25:36,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 15:25:36,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 15:25:36,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 15:25:36,883 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 15:25:36,884 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 15:25:36,885 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-08-30 15:25:38,109 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 15:25:38,329 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 15:25:38,330 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-08-30 15:25:38,338 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1545a0d3d/0c8256baf902412ab7a505ee9e6020f4/FLAG047be213c [2023-08-30 15:25:38,358 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1545a0d3d/0c8256baf902412ab7a505ee9e6020f4 [2023-08-30 15:25:38,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 15:25:38,362 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 15:25:38,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 15:25:38,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 15:25:38,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 15:25:38,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:25:38" (1/1) ... [2023-08-30 15:25:38,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@677957bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:38, skipping insertion in model container [2023-08-30 15:25:38,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:25:38" (1/1) ... [2023-08-30 15:25:38,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 15:25:38,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 15:25:38,563 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-figure1-alt.wvr.c[2087,2100] [2023-08-30 15:25:38,564 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:25:38,575 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 15:25:38,603 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-figure1-alt.wvr.c[2087,2100] [2023-08-30 15:25:38,604 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 15:25:38,611 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:25:38,611 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 15:25:38,618 INFO L208 MainTranslator]: Completed translation [2023-08-30 15:25:38,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:38 WrapperNode [2023-08-30 15:25:38,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 15:25:38,620 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 15:25:38,620 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 15:25:38,620 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 15:25:38,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:38" (1/1) ... [2023-08-30 15:25:38,639 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:38" (1/1) ... [2023-08-30 15:25:38,665 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 84 [2023-08-30 15:25:38,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 15:25:38,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 15:25:38,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 15:25:38,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 15:25:38,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:38" (1/1) ... [2023-08-30 15:25:38,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:38" (1/1) ... [2023-08-30 15:25:38,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:38" (1/1) ... [2023-08-30 15:25:38,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:38" (1/1) ... [2023-08-30 15:25:38,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:38" (1/1) ... [2023-08-30 15:25:38,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:38" (1/1) ... [2023-08-30 15:25:38,704 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:38" (1/1) ... [2023-08-30 15:25:38,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:38" (1/1) ... [2023-08-30 15:25:38,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 15:25:38,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 15:25:38,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 15:25:38,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 15:25:38,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:38" (1/1) ... [2023-08-30 15:25:38,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 15:25:38,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:38,741 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 15:25:38,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 15:25:38,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 15:25:38,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 15:25:38,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 15:25:38,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 15:25:38,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 15:25:38,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 15:25:38,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 15:25:38,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 15:25:38,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 15:25:38,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 15:25:38,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 15:25:38,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 15:25:38,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 15:25:38,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 15:25:38,780 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 15:25:38,856 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 15:25:38,858 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 15:25:39,125 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 15:25:39,208 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 15:25:39,209 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 15:25:39,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:25:39 BoogieIcfgContainer [2023-08-30 15:25:39,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 15:25:39,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 15:25:39,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 15:25:39,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 15:25:39,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 03:25:38" (1/3) ... [2023-08-30 15:25:39,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec76cb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:25:39, skipping insertion in model container [2023-08-30 15:25:39,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:25:38" (2/3) ... [2023-08-30 15:25:39,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec76cb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:25:39, skipping insertion in model container [2023-08-30 15:25:39,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:25:39" (3/3) ... [2023-08-30 15:25:39,218 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2023-08-30 15:25:39,226 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 15:25:39,234 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 15:25:39,235 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-30 15:25:39,235 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 15:25:39,319 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 15:25:39,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 98 transitions, 212 flow [2023-08-30 15:25:39,432 INFO L130 PetriNetUnfolder]: 6/96 cut-off events. [2023-08-30 15:25:39,432 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 15:25:39,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 96 events. 6/96 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 90 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2023-08-30 15:25:39,438 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 98 transitions, 212 flow [2023-08-30 15:25:39,442 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 81 transitions, 174 flow [2023-08-30 15:25:39,446 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 15:25:39,458 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 81 transitions, 174 flow [2023-08-30 15:25:39,462 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 81 transitions, 174 flow [2023-08-30 15:25:39,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 81 transitions, 174 flow [2023-08-30 15:25:39,492 INFO L130 PetriNetUnfolder]: 5/81 cut-off events. [2023-08-30 15:25:39,492 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 15:25:39,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 81 events. 5/81 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2023-08-30 15:25:39,495 INFO L119 LiptonReduction]: Number of co-enabled transitions 992 [2023-08-30 15:25:42,015 INFO L134 LiptonReduction]: Checked pairs total: 1236 [2023-08-30 15:25:42,015 INFO L136 LiptonReduction]: Total number of compositions: 75 [2023-08-30 15:25:42,026 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 15:25:42,032 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;@43318c5b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 15:25:42,032 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-08-30 15:25:42,034 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2023-08-30 15:25:42,035 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 15:25:42,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:42,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 15:25:42,036 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:25:42,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:42,040 INFO L85 PathProgramCache]: Analyzing trace with hash 12203368, now seen corresponding path program 1 times [2023-08-30 15:25:42,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:42,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498367939] [2023-08-30 15:25:42,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:42,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:42,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:42,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:42,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498367939] [2023-08-30 15:25:42,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498367939] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:25:42,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:25:42,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:25:42,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487468163] [2023-08-30 15:25:42,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:25:42,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:25:42,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:42,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:25:42,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:25:42,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-08-30 15:25:42,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:42,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:42,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-08-30 15:25:42,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:42,371 INFO L130 PetriNetUnfolder]: 215/337 cut-off events. [2023-08-30 15:25:42,371 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-08-30 15:25:42,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 703 conditions, 337 events. 215/337 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 1250 event pairs, 41 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 595. Up to 306 conditions per place. [2023-08-30 15:25:42,375 INFO L137 encePairwiseOnDemand]: 162/173 looper letters, 30 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2023-08-30 15:25:42,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 36 transitions, 161 flow [2023-08-30 15:25:42,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:25:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:25:42,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 288 transitions. [2023-08-30 15:25:42,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5549132947976878 [2023-08-30 15:25:42,388 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 288 transitions. [2023-08-30 15:25:42,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 288 transitions. [2023-08-30 15:25:42,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:42,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 288 transitions. [2023-08-30 15:25:42,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:42,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:42,398 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:42,399 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 3 states and 288 transitions. [2023-08-30 15:25:42,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 36 transitions, 161 flow [2023-08-30 15:25:42,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 147 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 15:25:42,403 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 86 flow [2023-08-30 15:25:42,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2023-08-30 15:25:42,407 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-08-30 15:25:42,408 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 86 flow [2023-08-30 15:25:42,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:42,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:42,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 15:25:42,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 15:25:42,409 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:25:42,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:42,409 INFO L85 PathProgramCache]: Analyzing trace with hash 12203416, now seen corresponding path program 1 times [2023-08-30 15:25:42,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:42,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67796271] [2023-08-30 15:25:42,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:42,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:42,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:42,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67796271] [2023-08-30 15:25:42,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67796271] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:25:42,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:25:42,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:25:42,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290063554] [2023-08-30 15:25:42,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:25:42,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:25:42,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:42,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:25:42,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:25:42,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-08-30 15:25:42,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:42,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:42,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-08-30 15:25:42,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:42,559 INFO L130 PetriNetUnfolder]: 198/324 cut-off events. [2023-08-30 15:25:42,559 INFO L131 PetriNetUnfolder]: For 25/53 co-relation queries the response was YES. [2023-08-30 15:25:42,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 846 conditions, 324 events. 198/324 cut-off events. For 25/53 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 1347 event pairs, 105 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 730. Up to 290 conditions per place. [2023-08-30 15:25:42,562 INFO L137 encePairwiseOnDemand]: 169/173 looper letters, 31 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-08-30 15:25:42,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 165 flow [2023-08-30 15:25:42,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:25:42,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:25:42,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-08-30 15:25:42,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535645472061657 [2023-08-30 15:25:42,565 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-08-30 15:25:42,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-08-30 15:25:42,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:42,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-08-30 15:25:42,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:42,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:42,569 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:42,569 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 86 flow. Second operand 3 states and 278 transitions. [2023-08-30 15:25:42,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 165 flow [2023-08-30 15:25:42,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 163 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:25:42,571 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 78 flow [2023-08-30 15:25:42,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-08-30 15:25:42,571 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-08-30 15:25:42,572 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 78 flow [2023-08-30 15:25:42,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:42,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:42,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 15:25:42,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 15:25:42,573 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:25:42,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:42,573 INFO L85 PathProgramCache]: Analyzing trace with hash 378306317, now seen corresponding path program 1 times [2023-08-30 15:25:42,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:42,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587982176] [2023-08-30 15:25:42,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:42,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:42,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:42,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587982176] [2023-08-30 15:25:42,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587982176] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:42,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632561208] [2023-08-30 15:25:42,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:42,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:42,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:42,635 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:42,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 15:25:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:42,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:25:42,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:42,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:25:42,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:42,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632561208] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:25:42,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:25:42,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 15:25:42,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613443799] [2023-08-30 15:25:42,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:25:42,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:25:42,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:42,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:25:42,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 15:25:42,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-08-30 15:25:42,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 82.42857142857143) internal successors, (577), 7 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:42,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:42,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-08-30 15:25:42,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:43,069 INFO L130 PetriNetUnfolder]: 636/975 cut-off events. [2023-08-30 15:25:43,070 INFO L131 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2023-08-30 15:25:43,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2574 conditions, 975 events. 636/975 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 4702 event pairs, 80 based on Foata normal form. 0/528 useless extension candidates. Maximal degree in co-relation 922. Up to 588 conditions per place. [2023-08-30 15:25:43,080 INFO L137 encePairwiseOnDemand]: 169/173 looper letters, 86 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2023-08-30 15:25:43,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 96 transitions, 481 flow [2023-08-30 15:25:43,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:25:43,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:25:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 665 transitions. [2023-08-30 15:25:43,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5491329479768786 [2023-08-30 15:25:43,085 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 665 transitions. [2023-08-30 15:25:43,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 665 transitions. [2023-08-30 15:25:43,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:43,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 665 transitions. [2023-08-30 15:25:43,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 95.0) internal successors, (665), 7 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:43,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 173.0) internal successors, (1384), 8 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:43,092 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 173.0) internal successors, (1384), 8 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:43,093 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 78 flow. Second operand 7 states and 665 transitions. [2023-08-30 15:25:43,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 96 transitions, 481 flow [2023-08-30 15:25:43,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 96 transitions, 477 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 15:25:43,098 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 133 flow [2023-08-30 15:25:43,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, 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=133, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-30 15:25:43,099 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2023-08-30 15:25:43,099 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 133 flow [2023-08-30 15:25:43,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.42857142857143) internal successors, (577), 7 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:43,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:43,100 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 15:25:43,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 15:25:43,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:43,306 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:25:43,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:43,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1157405639, now seen corresponding path program 1 times [2023-08-30 15:25:43,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:43,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677336020] [2023-08-30 15:25:43,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:43,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:43,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:43,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677336020] [2023-08-30 15:25:43,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677336020] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:43,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240540462] [2023-08-30 15:25:43,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:43,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:43,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:43,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:43,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 15:25:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:43,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 15:25:43,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:43,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:25:43,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240540462] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:25:43,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:25:43,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-30 15:25:43,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743562736] [2023-08-30 15:25:43,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:25:43,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 15:25:43,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:43,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 15:25:43,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 15:25:43,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-08-30 15:25:43,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 133 flow. Second operand has 5 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:43,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:43,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-08-30 15:25:43,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:43,619 INFO L130 PetriNetUnfolder]: 577/902 cut-off events. [2023-08-30 15:25:43,619 INFO L131 PetriNetUnfolder]: For 85/85 co-relation queries the response was YES. [2023-08-30 15:25:43,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2513 conditions, 902 events. 577/902 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 4444 event pairs, 33 based on Foata normal form. 28/616 useless extension candidates. Maximal degree in co-relation 1173. Up to 665 conditions per place. [2023-08-30 15:25:43,625 INFO L137 encePairwiseOnDemand]: 170/173 looper letters, 52 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-08-30 15:25:43,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 56 transitions, 295 flow [2023-08-30 15:25:43,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 15:25:43,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 15:25:43,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 460 transitions. [2023-08-30 15:25:43,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317919075144508 [2023-08-30 15:25:43,627 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 460 transitions. [2023-08-30 15:25:43,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 460 transitions. [2023-08-30 15:25:43,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:43,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 460 transitions. [2023-08-30 15:25:43,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:43,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 173.0) internal successors, (1038), 6 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:43,631 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 173.0) internal successors, (1038), 6 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:43,631 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 133 flow. Second operand 5 states and 460 transitions. [2023-08-30 15:25:43,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 56 transitions, 295 flow [2023-08-30 15:25:43,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 56 transitions, 293 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:25:43,637 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 110 flow [2023-08-30 15:25:43,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2023-08-30 15:25:43,638 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2023-08-30 15:25:43,638 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 110 flow [2023-08-30 15:25:43,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:43,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:43,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 15:25:43,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 15:25:43,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-30 15:25:43,845 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:25:43,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:43,846 INFO L85 PathProgramCache]: Analyzing trace with hash 378306269, now seen corresponding path program 1 times [2023-08-30 15:25:43,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:43,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118712151] [2023-08-30 15:25:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:43,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:43,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:43,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118712151] [2023-08-30 15:25:43,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118712151] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:25:43,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:25:43,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:25:43,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763105166] [2023-08-30 15:25:43,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:25:43,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:25:43,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:43,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:25:43,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:25:43,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-08-30 15:25:43,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:43,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:43,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-08-30 15:25:43,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:43,993 INFO L130 PetriNetUnfolder]: 446/711 cut-off events. [2023-08-30 15:25:43,994 INFO L131 PetriNetUnfolder]: For 244/252 co-relation queries the response was YES. [2023-08-30 15:25:43,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2000 conditions, 711 events. 446/711 cut-off events. For 244/252 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 3577 event pairs, 270 based on Foata normal form. 0/498 useless extension candidates. Maximal degree in co-relation 933. Up to 706 conditions per place. [2023-08-30 15:25:43,999 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 22 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-30 15:25:44,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 25 transitions, 152 flow [2023-08-30 15:25:44,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:25:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:25:44,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2023-08-30 15:25:44,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51252408477842 [2023-08-30 15:25:44,001 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 266 transitions. [2023-08-30 15:25:44,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 266 transitions. [2023-08-30 15:25:44,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:44,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 266 transitions. [2023-08-30 15:25:44,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:44,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:44,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:44,005 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 110 flow. Second operand 3 states and 266 transitions. [2023-08-30 15:25:44,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 25 transitions, 152 flow [2023-08-30 15:25:44,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 25 transitions, 147 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 15:25:44,008 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 103 flow [2023-08-30 15:25:44,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=32, 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=103, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-08-30 15:25:44,010 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-08-30 15:25:44,010 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 103 flow [2023-08-30 15:25:44,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:44,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:44,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 15:25:44,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 15:25:44,013 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:25:44,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:44,013 INFO L85 PathProgramCache]: Analyzing trace with hash 378306270, now seen corresponding path program 1 times [2023-08-30 15:25:44,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:44,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135930704] [2023-08-30 15:25:44,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:44,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:44,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:44,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135930704] [2023-08-30 15:25:44,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135930704] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:44,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695153783] [2023-08-30 15:25:44,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:44,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:44,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:44,081 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:44,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 15:25:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:44,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:25:44,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:44,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:25:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:44,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695153783] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:25:44,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:25:44,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 15:25:44,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743100287] [2023-08-30 15:25:44,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:25:44,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:25:44,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:44,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:25:44,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 15:25:44,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-08-30 15:25:44,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 103 flow. Second operand has 7 states, 7 states have (on average 83.57142857142857) internal successors, (585), 7 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:44,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:44,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-08-30 15:25:44,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:44,331 INFO L130 PetriNetUnfolder]: 593/1082 cut-off events. [2023-08-30 15:25:44,331 INFO L131 PetriNetUnfolder]: For 395/395 co-relation queries the response was YES. [2023-08-30 15:25:44,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3030 conditions, 1082 events. 593/1082 cut-off events. For 395/395 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5921 event pairs, 89 based on Foata normal form. 136/995 useless extension candidates. Maximal degree in co-relation 3019. Up to 487 conditions per place. [2023-08-30 15:25:44,338 INFO L137 encePairwiseOnDemand]: 165/173 looper letters, 61 selfloop transitions, 25 changer transitions 0/88 dead transitions. [2023-08-30 15:25:44,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 88 transitions, 513 flow [2023-08-30 15:25:44,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 15:25:44,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 15:25:44,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 579 transitions. [2023-08-30 15:25:44,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578034682080925 [2023-08-30 15:25:44,341 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 579 transitions. [2023-08-30 15:25:44,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 579 transitions. [2023-08-30 15:25:44,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:44,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 579 transitions. [2023-08-30 15:25:44,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.5) internal successors, (579), 6 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:44,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 173.0) internal successors, (1211), 7 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:44,345 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 173.0) internal successors, (1211), 7 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:44,345 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 103 flow. Second operand 6 states and 579 transitions. [2023-08-30 15:25:44,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 88 transitions, 513 flow [2023-08-30 15:25:44,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 88 transitions, 512 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:25:44,348 INFO L231 Difference]: Finished difference. Result has 42 places, 45 transitions, 370 flow [2023-08-30 15:25:44,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=42, PETRI_TRANSITIONS=45} [2023-08-30 15:25:44,349 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2023-08-30 15:25:44,349 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 45 transitions, 370 flow [2023-08-30 15:25:44,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.57142857142857) internal successors, (585), 7 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:44,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:44,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:25:44,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 15:25:44,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:44,556 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:25:44,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:44,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1225627852, now seen corresponding path program 1 times [2023-08-30 15:25:44,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:44,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322403320] [2023-08-30 15:25:44,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:44,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:44,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:44,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322403320] [2023-08-30 15:25:44,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322403320] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:25:44,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:25:44,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:25:44,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898051575] [2023-08-30 15:25:44,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:25:44,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:25:44,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:44,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:25:44,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:25:44,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-08-30 15:25:44,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 45 transitions, 370 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:44,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:44,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-08-30 15:25:44,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:44,755 INFO L130 PetriNetUnfolder]: 587/1125 cut-off events. [2023-08-30 15:25:44,755 INFO L131 PetriNetUnfolder]: For 1697/1697 co-relation queries the response was YES. [2023-08-30 15:25:44,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4167 conditions, 1125 events. 587/1125 cut-off events. For 1697/1697 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6207 event pairs, 343 based on Foata normal form. 0/977 useless extension candidates. Maximal degree in co-relation 4151. Up to 926 conditions per place. [2023-08-30 15:25:44,764 INFO L137 encePairwiseOnDemand]: 169/173 looper letters, 59 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2023-08-30 15:25:44,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 64 transitions, 629 flow [2023-08-30 15:25:44,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:25:44,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:25:44,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-08-30 15:25:44,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535645472061657 [2023-08-30 15:25:44,766 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-08-30 15:25:44,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-08-30 15:25:44,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:44,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-08-30 15:25:44,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:44,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:44,768 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:44,768 INFO L175 Difference]: Start difference. First operand has 42 places, 45 transitions, 370 flow. Second operand 3 states and 278 transitions. [2023-08-30 15:25:44,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 64 transitions, 629 flow [2023-08-30 15:25:44,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 64 transitions, 571 flow, removed 29 selfloop flow, removed 0 redundant places. [2023-08-30 15:25:44,774 INFO L231 Difference]: Finished difference. Result has 45 places, 48 transitions, 380 flow [2023-08-30 15:25:44,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=380, PETRI_PLACES=45, PETRI_TRANSITIONS=48} [2023-08-30 15:25:44,775 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2023-08-30 15:25:44,775 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 48 transitions, 380 flow [2023-08-30 15:25:44,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:44,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:44,776 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 15:25:44,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 15:25:44,776 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:25:44,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:44,777 INFO L85 PathProgramCache]: Analyzing trace with hash 129723049, now seen corresponding path program 2 times [2023-08-30 15:25:44,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:44,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662437867] [2023-08-30 15:25:44,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:44,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:44,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:44,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662437867] [2023-08-30 15:25:44,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662437867] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:44,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107534660] [2023-08-30 15:25:44,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:25:44,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:44,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:44,881 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:44,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 15:25:44,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 15:25:44,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:25:44,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 15:25:44,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:44,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:25:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:45,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107534660] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:25:45,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:25:45,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 15:25:45,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934180518] [2023-08-30 15:25:45,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:25:45,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 15:25:45,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:45,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 15:25:45,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 15:25:45,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-08-30 15:25:45,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 48 transitions, 380 flow. Second operand has 13 states, 13 states have (on average 83.3076923076923) internal successors, (1083), 13 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:45,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:45,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-08-30 15:25:45,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:45,511 INFO L130 PetriNetUnfolder]: 1355/2567 cut-off events. [2023-08-30 15:25:45,511 INFO L131 PetriNetUnfolder]: For 6674/6748 co-relation queries the response was YES. [2023-08-30 15:25:45,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9542 conditions, 2567 events. 1355/2567 cut-off events. For 6674/6748 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 16916 event pairs, 169 based on Foata normal form. 344/2387 useless extension candidates. Maximal degree in co-relation 9524. Up to 845 conditions per place. [2023-08-30 15:25:45,533 INFO L137 encePairwiseOnDemand]: 165/173 looper letters, 123 selfloop transitions, 97 changer transitions 0/222 dead transitions. [2023-08-30 15:25:45,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 222 transitions, 1767 flow [2023-08-30 15:25:45,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 15:25:45,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 15:25:45,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1173 transitions. [2023-08-30 15:25:45,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565028901734104 [2023-08-30 15:25:45,537 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1173 transitions. [2023-08-30 15:25:45,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1173 transitions. [2023-08-30 15:25:45,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:45,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1173 transitions. [2023-08-30 15:25:45,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 97.75) internal successors, (1173), 12 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:45,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 173.0) internal successors, (2249), 13 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:45,545 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 173.0) internal successors, (2249), 13 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:45,545 INFO L175 Difference]: Start difference. First operand has 45 places, 48 transitions, 380 flow. Second operand 12 states and 1173 transitions. [2023-08-30 15:25:45,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 222 transitions, 1767 flow [2023-08-30 15:25:45,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 222 transitions, 1754 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 15:25:45,554 INFO L231 Difference]: Finished difference. Result has 65 places, 122 transitions, 1529 flow [2023-08-30 15:25:45,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1529, PETRI_PLACES=65, PETRI_TRANSITIONS=122} [2023-08-30 15:25:45,555 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2023-08-30 15:25:45,555 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 122 transitions, 1529 flow [2023-08-30 15:25:45,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 83.3076923076923) internal successors, (1083), 13 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:45,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:45,556 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-30 15:25:45,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 15:25:45,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:45,761 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:25:45,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:45,762 INFO L85 PathProgramCache]: Analyzing trace with hash 129723096, now seen corresponding path program 2 times [2023-08-30 15:25:45,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:45,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045028611] [2023-08-30 15:25:45,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:45,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:45,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:45,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045028611] [2023-08-30 15:25:45,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045028611] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:45,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94112322] [2023-08-30 15:25:45,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:25:45,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:45,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:45,841 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:45,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 15:25:45,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:25:45,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:25:45,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:25:45,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 15:25:45,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:25:45,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94112322] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:25:45,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:25:45,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-08-30 15:25:45,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720235604] [2023-08-30 15:25:45,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:25:45,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:25:45,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:45,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:25:45,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 15:25:45,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-08-30 15:25:45,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 122 transitions, 1529 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:45,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:45,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-08-30 15:25:45,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:46,230 INFO L130 PetriNetUnfolder]: 1085/2106 cut-off events. [2023-08-30 15:25:46,230 INFO L131 PetriNetUnfolder]: For 7650/7709 co-relation queries the response was YES. [2023-08-30 15:25:46,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9313 conditions, 2106 events. 1085/2106 cut-off events. For 7650/7709 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13832 event pairs, 731 based on Foata normal form. 123/1899 useless extension candidates. Maximal degree in co-relation 9284. Up to 2102 conditions per place. [2023-08-30 15:25:46,249 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 100 selfloop transitions, 1 changer transitions 0/103 dead transitions. [2023-08-30 15:25:46,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 103 transitions, 1509 flow [2023-08-30 15:25:46,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:25:46,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:25:46,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 262 transitions. [2023-08-30 15:25:46,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048169556840078 [2023-08-30 15:25:46,251 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 262 transitions. [2023-08-30 15:25:46,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 262 transitions. [2023-08-30 15:25:46,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:46,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 262 transitions. [2023-08-30 15:25:46,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:46,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:46,254 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:46,254 INFO L175 Difference]: Start difference. First operand has 65 places, 122 transitions, 1529 flow. Second operand 3 states and 262 transitions. [2023-08-30 15:25:46,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 103 transitions, 1509 flow [2023-08-30 15:25:46,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 103 transitions, 1196 flow, removed 145 selfloop flow, removed 3 redundant places. [2023-08-30 15:25:46,285 INFO L231 Difference]: Finished difference. Result has 63 places, 103 transitions, 996 flow [2023-08-30 15:25:46,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=996, PETRI_PLACES=63, PETRI_TRANSITIONS=103} [2023-08-30 15:25:46,286 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2023-08-30 15:25:46,286 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 103 transitions, 996 flow [2023-08-30 15:25:46,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:46,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:46,287 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:25:46,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 15:25:46,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:46,493 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:25:46,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:46,494 INFO L85 PathProgramCache]: Analyzing trace with hash -2058569159, now seen corresponding path program 1 times [2023-08-30 15:25:46,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:46,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415197513] [2023-08-30 15:25:46,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:46,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:46,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:46,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415197513] [2023-08-30 15:25:46,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415197513] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:46,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900684580] [2023-08-30 15:25:46,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:46,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:46,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:46,554 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:46,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 15:25:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:46,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:25:46,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:46,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:25:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:46,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900684580] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:25:46,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:25:46,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 15:25:46,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749810736] [2023-08-30 15:25:46,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:25:46,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 15:25:46,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:46,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 15:25:46,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 15:25:46,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-08-30 15:25:46,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 103 transitions, 996 flow. Second operand has 7 states, 7 states have (on average 83.57142857142857) internal successors, (585), 7 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:46,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:46,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-08-30 15:25:46,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:47,223 INFO L130 PetriNetUnfolder]: 1991/3626 cut-off events. [2023-08-30 15:25:47,223 INFO L131 PetriNetUnfolder]: For 9208/9208 co-relation queries the response was YES. [2023-08-30 15:25:47,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13802 conditions, 3626 events. 1991/3626 cut-off events. For 9208/9208 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 22957 event pairs, 486 based on Foata normal form. 0/3079 useless extension candidates. Maximal degree in co-relation 13774. Up to 1137 conditions per place. [2023-08-30 15:25:47,251 INFO L137 encePairwiseOnDemand]: 169/173 looper letters, 196 selfloop transitions, 107 changer transitions 0/304 dead transitions. [2023-08-30 15:25:47,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 304 transitions, 3425 flow [2023-08-30 15:25:47,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 15:25:47,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 15:25:47,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 646 transitions. [2023-08-30 15:25:47,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5334434351775392 [2023-08-30 15:25:47,254 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 646 transitions. [2023-08-30 15:25:47,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 646 transitions. [2023-08-30 15:25:47,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:47,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 646 transitions. [2023-08-30 15:25:47,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.28571428571429) internal successors, (646), 7 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:47,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 173.0) internal successors, (1384), 8 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:47,258 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 173.0) internal successors, (1384), 8 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:47,258 INFO L175 Difference]: Start difference. First operand has 63 places, 103 transitions, 996 flow. Second operand 7 states and 646 transitions. [2023-08-30 15:25:47,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 304 transitions, 3425 flow [2023-08-30 15:25:47,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 304 transitions, 3404 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-08-30 15:25:47,316 INFO L231 Difference]: Finished difference. Result has 71 places, 185 transitions, 2244 flow [2023-08-30 15:25:47,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2244, PETRI_PLACES=71, PETRI_TRANSITIONS=185} [2023-08-30 15:25:47,317 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 42 predicate places. [2023-08-30 15:25:47,317 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 185 transitions, 2244 flow [2023-08-30 15:25:47,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.57142857142857) internal successors, (585), 7 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:47,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:47,318 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:25:47,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 15:25:47,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:47,523 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:25:47,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:47,524 INFO L85 PathProgramCache]: Analyzing trace with hash 74678889, now seen corresponding path program 1 times [2023-08-30 15:25:47,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:47,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453100276] [2023-08-30 15:25:47,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:47,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 15:25:47,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:47,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453100276] [2023-08-30 15:25:47,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453100276] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:25:47,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:25:47,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 15:25:47,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453156498] [2023-08-30 15:25:47,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:25:47,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:25:47,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:47,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:25:47,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:25:47,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-08-30 15:25:47,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 185 transitions, 2244 flow. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:47,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:47,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-08-30 15:25:47,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:48,024 INFO L130 PetriNetUnfolder]: 1570/3047 cut-off events. [2023-08-30 15:25:48,024 INFO L131 PetriNetUnfolder]: For 12213/12213 co-relation queries the response was YES. [2023-08-30 15:25:48,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11941 conditions, 3047 events. 1570/3047 cut-off events. For 12213/12213 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 19970 event pairs, 428 based on Foata normal form. 172/3138 useless extension candidates. Maximal degree in co-relation 11910. Up to 2861 conditions per place. [2023-08-30 15:25:48,046 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 144 selfloop transitions, 1 changer transitions 0/146 dead transitions. [2023-08-30 15:25:48,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 146 transitions, 1966 flow [2023-08-30 15:25:48,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:25:48,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:25:48,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 268 transitions. [2023-08-30 15:25:48,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163776493256262 [2023-08-30 15:25:48,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 268 transitions. [2023-08-30 15:25:48,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 268 transitions. [2023-08-30 15:25:48,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:48,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 268 transitions. [2023-08-30 15:25:48,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:48,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:48,051 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:48,052 INFO L175 Difference]: Start difference. First operand has 71 places, 185 transitions, 2244 flow. Second operand 3 states and 268 transitions. [2023-08-30 15:25:48,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 146 transitions, 1966 flow [2023-08-30 15:25:48,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 146 transitions, 1873 flow, removed 41 selfloop flow, removed 1 redundant places. [2023-08-30 15:25:48,093 INFO L231 Difference]: Finished difference. Result has 70 places, 130 transitions, 1454 flow [2023-08-30 15:25:48,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1454, PETRI_PLACES=70, PETRI_TRANSITIONS=130} [2023-08-30 15:25:48,093 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2023-08-30 15:25:48,094 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 130 transitions, 1454 flow [2023-08-30 15:25:48,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:48,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:48,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:25:48,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 15:25:48,094 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:25:48,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:48,096 INFO L85 PathProgramCache]: Analyzing trace with hash -310441128, now seen corresponding path program 1 times [2023-08-30 15:25:48,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:48,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054245287] [2023-08-30 15:25:48,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:48,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:48,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:48,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:48,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054245287] [2023-08-30 15:25:48,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054245287] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:25:48,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:25:48,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:25:48,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177711920] [2023-08-30 15:25:48,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:25:48,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:25:48,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:48,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:25:48,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:25:48,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 173 [2023-08-30 15:25:48,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 130 transitions, 1454 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:48,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:48,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 173 [2023-08-30 15:25:48,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:48,565 INFO L130 PetriNetUnfolder]: 1479/2812 cut-off events. [2023-08-30 15:25:48,565 INFO L131 PetriNetUnfolder]: For 13231/13349 co-relation queries the response was YES. [2023-08-30 15:25:48,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10967 conditions, 2812 events. 1479/2812 cut-off events. For 13231/13349 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18333 event pairs, 1029 based on Foata normal form. 118/2922 useless extension candidates. Maximal degree in co-relation 10935. Up to 2808 conditions per place. [2023-08-30 15:25:48,586 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 126 selfloop transitions, 1 changer transitions 0/129 dead transitions. [2023-08-30 15:25:48,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 129 transitions, 1706 flow [2023-08-30 15:25:48,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:25:48,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:25:48,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2023-08-30 15:25:48,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48940269749518306 [2023-08-30 15:25:48,588 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 254 transitions. [2023-08-30 15:25:48,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 254 transitions. [2023-08-30 15:25:48,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:48,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 254 transitions. [2023-08-30 15:25:48,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:48,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:48,590 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:48,590 INFO L175 Difference]: Start difference. First operand has 70 places, 130 transitions, 1454 flow. Second operand 3 states and 254 transitions. [2023-08-30 15:25:48,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 129 transitions, 1706 flow [2023-08-30 15:25:48,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 129 transitions, 1705 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:25:48,626 INFO L231 Difference]: Finished difference. Result has 70 places, 129 transitions, 1453 flow [2023-08-30 15:25:48,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1453, PETRI_PLACES=70, PETRI_TRANSITIONS=129} [2023-08-30 15:25:48,627 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2023-08-30 15:25:48,627 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 129 transitions, 1453 flow [2023-08-30 15:25:48,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:48,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:48,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:25:48,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 15:25:48,628 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:25:48,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:48,629 INFO L85 PathProgramCache]: Analyzing trace with hash -799674974, now seen corresponding path program 1 times [2023-08-30 15:25:48,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:48,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473717095] [2023-08-30 15:25:48,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:48,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:48,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:48,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473717095] [2023-08-30 15:25:48,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473717095] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:25:48,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 15:25:48,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 15:25:48,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690496426] [2023-08-30 15:25:48,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:25:48,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:25:48,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:48,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:25:48,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 15:25:48,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 173 [2023-08-30 15:25:48,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 129 transitions, 1453 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:48,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:48,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 173 [2023-08-30 15:25:48,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:49,073 INFO L130 PetriNetUnfolder]: 1479/2733 cut-off events. [2023-08-30 15:25:49,073 INFO L131 PetriNetUnfolder]: For 13225/13343 co-relation queries the response was YES. [2023-08-30 15:25:49,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10810 conditions, 2733 events. 1479/2733 cut-off events. For 13225/13343 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17271 event pairs, 1029 based on Foata normal form. 197/2922 useless extension candidates. Maximal degree in co-relation 10777. Up to 2729 conditions per place. [2023-08-30 15:25:49,091 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 124 selfloop transitions, 1 changer transitions 1/128 dead transitions. [2023-08-30 15:25:49,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 128 transitions, 1703 flow [2023-08-30 15:25:49,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:25:49,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:25:49,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2023-08-30 15:25:49,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48747591522157996 [2023-08-30 15:25:49,093 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 253 transitions. [2023-08-30 15:25:49,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 253 transitions. [2023-08-30 15:25:49,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:49,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 253 transitions. [2023-08-30 15:25:49,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:49,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:49,095 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:49,095 INFO L175 Difference]: Start difference. First operand has 70 places, 129 transitions, 1453 flow. Second operand 3 states and 253 transitions. [2023-08-30 15:25:49,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 128 transitions, 1703 flow [2023-08-30 15:25:49,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 128 transitions, 1702 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:25:49,130 INFO L231 Difference]: Finished difference. Result has 70 places, 127 transitions, 1449 flow [2023-08-30 15:25:49,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=1450, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1449, PETRI_PLACES=70, PETRI_TRANSITIONS=127} [2023-08-30 15:25:49,130 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2023-08-30 15:25:49,130 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 127 transitions, 1449 flow [2023-08-30 15:25:49,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:49,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:49,131 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-30 15:25:49,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 15:25:49,131 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:25:49,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:49,132 INFO L85 PathProgramCache]: Analyzing trace with hash -325022071, now seen corresponding path program 3 times [2023-08-30 15:25:49,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:49,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777209975] [2023-08-30 15:25:49,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:49,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:49,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:49,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777209975] [2023-08-30 15:25:49,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777209975] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:49,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615011882] [2023-08-30 15:25:49,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 15:25:49,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:49,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:49,311 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:49,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 15:25:49,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 15:25:49,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:25:49,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 15:25:49,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:49,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:25:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:49,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615011882] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:25:49,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:25:49,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-30 15:25:49,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808936017] [2023-08-30 15:25:49,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:25:49,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 15:25:49,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:49,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 15:25:49,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-08-30 15:25:49,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-08-30 15:25:49,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 127 transitions, 1449 flow. Second operand has 25 states, 25 states have (on average 83.16) internal successors, (2079), 25 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:49,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:49,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-08-30 15:25:49,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:50,759 INFO L130 PetriNetUnfolder]: 3975/7051 cut-off events. [2023-08-30 15:25:50,759 INFO L131 PetriNetUnfolder]: For 119469/119737 co-relation queries the response was YES. [2023-08-30 15:25:50,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27114 conditions, 7051 events. 3975/7051 cut-off events. For 119469/119737 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 45587 event pairs, 265 based on Foata normal form. 1120/8167 useless extension candidates. Maximal degree in co-relation 27080. Up to 1270 conditions per place. [2023-08-30 15:25:50,796 INFO L137 encePairwiseOnDemand]: 167/173 looper letters, 177 selfloop transitions, 323 changer transitions 0/502 dead transitions. [2023-08-30 15:25:50,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 502 transitions, 5516 flow [2023-08-30 15:25:50,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 15:25:50,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 15:25:50,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2246 transitions. [2023-08-30 15:25:50,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409441233140655 [2023-08-30 15:25:50,802 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2246 transitions. [2023-08-30 15:25:50,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2246 transitions. [2023-08-30 15:25:50,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:50,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2246 transitions. [2023-08-30 15:25:50,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 93.58333333333333) internal successors, (2246), 24 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:50,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 173.0) internal successors, (4325), 25 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:50,814 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 173.0) internal successors, (4325), 25 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:50,815 INFO L175 Difference]: Start difference. First operand has 70 places, 127 transitions, 1449 flow. Second operand 24 states and 2246 transitions. [2023-08-30 15:25:50,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 502 transitions, 5516 flow [2023-08-30 15:25:50,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 502 transitions, 5515 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:25:50,864 INFO L231 Difference]: Finished difference. Result has 113 places, 348 transitions, 5567 flow [2023-08-30 15:25:50,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5567, PETRI_PLACES=113, PETRI_TRANSITIONS=348} [2023-08-30 15:25:50,865 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 84 predicate places. [2023-08-30 15:25:50,865 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 348 transitions, 5567 flow [2023-08-30 15:25:50,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 83.16) internal successors, (2079), 25 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:50,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:50,866 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 15:25:50,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 15:25:51,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:51,071 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:25:51,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:51,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1086658960, now seen corresponding path program 2 times [2023-08-30 15:25:51,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:51,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873678075] [2023-08-30 15:25:51,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:51,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:51,166 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 15:25:51,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:51,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873678075] [2023-08-30 15:25:51,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873678075] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:51,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465818319] [2023-08-30 15:25:51,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 15:25:51,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:51,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:51,169 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:51,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 15:25:51,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 15:25:51,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:25:51,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 15:25:51,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-30 15:25:51,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 15:25:51,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465818319] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 15:25:51,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 15:25:51,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-08-30 15:25:51,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577385472] [2023-08-30 15:25:51,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 15:25:51,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 15:25:51,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:51,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 15:25:51,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 15:25:51,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 173 [2023-08-30 15:25:51,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 348 transitions, 5567 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:51,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:51,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 173 [2023-08-30 15:25:51,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:52,145 INFO L130 PetriNetUnfolder]: 3474/6153 cut-off events. [2023-08-30 15:25:52,145 INFO L131 PetriNetUnfolder]: For 73450/73712 co-relation queries the response was YES. [2023-08-30 15:25:52,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28006 conditions, 6153 events. 3474/6153 cut-off events. For 73450/73712 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 39936 event pairs, 2374 based on Foata normal form. 630/6775 useless extension candidates. Maximal degree in co-relation 27949. Up to 6149 conditions per place. [2023-08-30 15:25:52,185 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 286 selfloop transitions, 1 changer transitions 0/289 dead transitions. [2023-08-30 15:25:52,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 289 transitions, 4939 flow [2023-08-30 15:25:52,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 15:25:52,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 15:25:52,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-08-30 15:25:52,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951830443159923 [2023-08-30 15:25:52,187 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-08-30 15:25:52,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-08-30 15:25:52,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:52,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-08-30 15:25:52,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:52,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:52,189 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:52,190 INFO L175 Difference]: Start difference. First operand has 113 places, 348 transitions, 5567 flow. Second operand 3 states and 257 transitions. [2023-08-30 15:25:52,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 289 transitions, 4939 flow [2023-08-30 15:25:52,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 289 transitions, 3656 flow, removed 464 selfloop flow, removed 9 redundant places. [2023-08-30 15:25:52,411 INFO L231 Difference]: Finished difference. Result has 105 places, 289 transitions, 3084 flow [2023-08-30 15:25:52,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=3082, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3084, PETRI_PLACES=105, PETRI_TRANSITIONS=289} [2023-08-30 15:25:52,412 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 76 predicate places. [2023-08-30 15:25:52,412 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 289 transitions, 3084 flow [2023-08-30 15:25:52,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:52,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:52,413 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2023-08-30 15:25:52,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 15:25:52,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 15:25:52,620 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:25:52,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:52,620 INFO L85 PathProgramCache]: Analyzing trace with hash -415130039, now seen corresponding path program 4 times [2023-08-30 15:25:52,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:52,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544375879] [2023-08-30 15:25:52,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:52,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:53,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:53,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544375879] [2023-08-30 15:25:53,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544375879] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:53,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793562639] [2023-08-30 15:25:53,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 15:25:53,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:53,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:53,213 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:53,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 15:25:53,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 15:25:53,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:25:53,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 15:25:53,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:53,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:25:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:54,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793562639] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:25:54,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:25:54,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2023-08-30 15:25:54,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529644801] [2023-08-30 15:25:54,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:25:54,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-30 15:25:54,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:25:54,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-30 15:25:54,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-08-30 15:25:54,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-08-30 15:25:54,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 289 transitions, 3084 flow. Second operand has 49 states, 49 states have (on average 83.08163265306122) internal successors, (4071), 49 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:54,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:25:54,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-08-30 15:25:54,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:25:56,773 INFO L130 PetriNetUnfolder]: 8918/15712 cut-off events. [2023-08-30 15:25:56,773 INFO L131 PetriNetUnfolder]: For 806588/806866 co-relation queries the response was YES. [2023-08-30 15:25:56,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53678 conditions, 15712 events. 8918/15712 cut-off events. For 806588/806866 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 103551 event pairs, 387 based on Foata normal form. 1818/17528 useless extension candidates. Maximal degree in co-relation 53628. Up to 3280 conditions per place. [2023-08-30 15:25:56,933 INFO L137 encePairwiseOnDemand]: 168/173 looper letters, 205 selfloop transitions, 766 changer transitions 138/1111 dead transitions. [2023-08-30 15:25:56,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 1111 transitions, 10543 flow [2023-08-30 15:25:56,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 15:25:56,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 15:25:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4455 transitions. [2023-08-30 15:25:56,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364884393063584 [2023-08-30 15:25:56,943 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4455 transitions. [2023-08-30 15:25:56,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4455 transitions. [2023-08-30 15:25:56,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:25:56,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4455 transitions. [2023-08-30 15:25:56,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 92.8125) internal successors, (4455), 48 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:56,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 173.0) internal successors, (8477), 49 states have internal predecessors, (8477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:56,968 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 173.0) internal successors, (8477), 49 states have internal predecessors, (8477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:56,968 INFO L175 Difference]: Start difference. First operand has 105 places, 289 transitions, 3084 flow. Second operand 48 states and 4455 transitions. [2023-08-30 15:25:56,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 1111 transitions, 10543 flow [2023-08-30 15:25:57,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 1111 transitions, 10542 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 15:25:57,127 INFO L231 Difference]: Finished difference. Result has 197 places, 789 transitions, 10856 flow [2023-08-30 15:25:57,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=3083, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=10856, PETRI_PLACES=197, PETRI_TRANSITIONS=789} [2023-08-30 15:25:57,129 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 168 predicate places. [2023-08-30 15:25:57,129 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 789 transitions, 10856 flow [2023-08-30 15:25:57,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 83.08163265306122) internal successors, (4071), 49 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:25:57,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:25:57,137 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1] [2023-08-30 15:25:57,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-30 15:25:57,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 15:25:57,342 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:25:57,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:25:57,342 INFO L85 PathProgramCache]: Analyzing trace with hash -395911735, now seen corresponding path program 5 times [2023-08-30 15:25:57,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:25:57,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544993584] [2023-08-30 15:25:57,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:25:57,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:25:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:25:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:58,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:25:58,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544993584] [2023-08-30 15:25:58,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544993584] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:25:58,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200148268] [2023-08-30 15:25:58,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 15:25:58,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:25:58,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:25:58,876 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:25:58,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 15:25:58,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-08-30 15:25:58,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:25:58,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 15:25:58,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:25:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:25:59,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:26:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:01,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200148268] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:26:01,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:26:01,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2023-08-30 15:26:01,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910891764] [2023-08-30 15:26:01,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:26:01,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-08-30 15:26:01,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:26:01,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-08-30 15:26:01,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-08-30 15:26:01,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-08-30 15:26:01,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 789 transitions, 10856 flow. Second operand has 97 states, 97 states have (on average 83.04123711340206) internal successors, (8055), 97 states have internal predecessors, (8055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:01,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:26:01,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-08-30 15:26:01,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:26:15,694 INFO L130 PetriNetUnfolder]: 24442/42936 cut-off events. [2023-08-30 15:26:15,695 INFO L131 PetriNetUnfolder]: For 9369612/9370178 co-relation queries the response was YES. [2023-08-30 15:26:16,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180937 conditions, 42936 events. 24442/42936 cut-off events. For 9369612/9370178 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 300183 event pairs, 619 based on Foata normal form. 3594/46528 useless extension candidates. Maximal degree in co-relation 180840. Up to 11359 conditions per place. [2023-08-30 15:26:16,527 INFO L137 encePairwiseOnDemand]: 168/173 looper letters, 397 selfloop transitions, 2346 changer transitions 282/3027 dead transitions. [2023-08-30 15:26:16,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 3027 transitions, 41017 flow [2023-08-30 15:26:16,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-08-30 15:26:16,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2023-08-30 15:26:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 8919 transitions. [2023-08-30 15:26:16,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370303468208093 [2023-08-30 15:26:16,540 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 8919 transitions. [2023-08-30 15:26:16,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 8919 transitions. [2023-08-30 15:26:16,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:26:16,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 8919 transitions. [2023-08-30 15:26:16,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 92.90625) internal successors, (8919), 96 states have internal predecessors, (8919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:16,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 173.0) internal successors, (16781), 97 states have internal predecessors, (16781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:16,586 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 173.0) internal successors, (16781), 97 states have internal predecessors, (16781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:16,586 INFO L175 Difference]: Start difference. First operand has 197 places, 789 transitions, 10856 flow. Second operand 96 states and 8919 transitions. [2023-08-30 15:26:16,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 3027 transitions, 41017 flow [2023-08-30 15:26:18,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 3027 transitions, 29461 flow, removed 5574 selfloop flow, removed 11 redundant places. [2023-08-30 15:26:18,326 INFO L231 Difference]: Finished difference. Result has 375 places, 2369 transitions, 31687 flow [2023-08-30 15:26:18,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=8846, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=777, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=31687, PETRI_PLACES=375, PETRI_TRANSITIONS=2369} [2023-08-30 15:26:18,327 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 346 predicate places. [2023-08-30 15:26:18,327 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 2369 transitions, 31687 flow [2023-08-30 15:26:18,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 83.04123711340206) internal successors, (8055), 97 states have internal predecessors, (8055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:18,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:26:18,329 INFO L208 CegarLoopForPetriNet]: trace histogram [94, 1, 1, 1, 1] [2023-08-30 15:26:18,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 15:26:18,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 15:26:18,538 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:26:18,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:26:18,538 INFO L85 PathProgramCache]: Analyzing trace with hash -360850231, now seen corresponding path program 6 times [2023-08-30 15:26:18,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:26:18,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585734361] [2023-08-30 15:26:18,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:26:18,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:26:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:26:23,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:23,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:26:23,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585734361] [2023-08-30 15:26:23,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585734361] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:26:23,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334393280] [2023-08-30 15:26:23,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 15:26:23,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:26:23,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:26:23,165 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:26:23,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 15:26:23,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2023-08-30 15:26:23,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 15:26:23,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-30 15:26:23,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:26:23,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:23,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:26:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:26:31,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334393280] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:26:31,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:26:31,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 191 [2023-08-30 15:26:31,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511717979] [2023-08-30 15:26:31,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:26:31,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-08-30 15:26:31,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:26:31,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-08-30 15:26:31,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2023-08-30 15:26:32,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-08-30 15:26:32,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 2369 transitions, 31687 flow. Second operand has 193 states, 193 states have (on average 83.02072538860104) internal successors, (16023), 193 states have internal predecessors, (16023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:26:32,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:26:32,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-08-30 15:26:32,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 15:28:25,501 INFO L130 PetriNetUnfolder]: 73950/129680 cut-off events. [2023-08-30 15:28:25,502 INFO L131 PetriNetUnfolder]: For 78281205/78282347 co-relation queries the response was YES. [2023-08-30 15:28:31,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546572 conditions, 129680 events. 73950/129680 cut-off events. For 78281205/78282347 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 976756 event pairs, 1043 based on Foata normal form. 7146/136824 useless extension candidates. Maximal degree in co-relation 546390. Up to 34111 conditions per place. [2023-08-30 15:28:31,522 INFO L137 encePairwiseOnDemand]: 168/173 looper letters, 781 selfloop transitions, 7814 changer transitions 570/9167 dead transitions. [2023-08-30 15:28:31,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 9167 transitions, 130600 flow [2023-08-30 15:28:31,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-08-30 15:28:31,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2023-08-30 15:28:31,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 17847 transitions. [2023-08-30 15:28:31,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5373013005780347 [2023-08-30 15:28:31,541 INFO L72 ComplementDD]: Start complementDD. Operand 192 states and 17847 transitions. [2023-08-30 15:28:31,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 192 states and 17847 transitions. [2023-08-30 15:28:31,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 15:28:31,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 192 states and 17847 transitions. [2023-08-30 15:28:31,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 193 states, 192 states have (on average 92.953125) internal successors, (17847), 192 states have internal predecessors, (17847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:31,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 193 states, 193 states have (on average 173.0) internal successors, (33389), 193 states have internal predecessors, (33389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:31,611 INFO L81 ComplementDD]: Finished complementDD. Result has 193 states, 193 states have (on average 173.0) internal successors, (33389), 193 states have internal predecessors, (33389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:31,611 INFO L175 Difference]: Start difference. First operand has 375 places, 2369 transitions, 31687 flow. Second operand 192 states and 17847 transitions. [2023-08-30 15:28:31,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 9167 transitions, 130600 flow [2023-08-30 15:28:48,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 9167 transitions, 90876 flow, removed 19230 selfloop flow, removed 23 redundant places. [2023-08-30 15:28:48,593 INFO L231 Difference]: Finished difference. Result has 733 places, 7837 transitions, 101542 flow [2023-08-30 15:28:48,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=27237, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=192, PETRI_FLOW=101542, PETRI_PLACES=733, PETRI_TRANSITIONS=7837} [2023-08-30 15:28:48,596 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 704 predicate places. [2023-08-30 15:28:48,596 INFO L495 AbstractCegarLoop]: Abstraction has has 733 places, 7837 transitions, 101542 flow [2023-08-30 15:28:48,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 83.02072538860104) internal successors, (16023), 193 states have internal predecessors, (16023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:28:48,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 15:28:48,599 INFO L208 CegarLoopForPetriNet]: trace histogram [190, 1, 1, 1, 1] [2023-08-30 15:28:48,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 15:28:48,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 15:28:48,805 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-30 15:28:48,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 15:28:48,805 INFO L85 PathProgramCache]: Analyzing trace with hash 803068617, now seen corresponding path program 7 times [2023-08-30 15:28:48,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 15:28:48,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068539848] [2023-08-30 15:28:48,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 15:28:48,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 15:28:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:29:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:29:04,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 15:29:04,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068539848] [2023-08-30 15:29:04,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068539848] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 15:29:04,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406833829] [2023-08-30 15:29:04,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 15:29:04,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 15:29:04,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 15:29:04,841 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 15:29:04,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 15:29:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 15:29:05,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 193 conjunts are in the unsatisfiable core [2023-08-30 15:29:05,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 15:29:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:29:05,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 15:29:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 15:29:37,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406833829] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 15:29:37,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 15:29:37,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 383 [2023-08-30 15:29:37,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633499059] [2023-08-30 15:29:37,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 15:29:37,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2023-08-30 15:29:37,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 15:29:37,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2023-08-30 15:29:37,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2023-08-30 15:29:39,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 173 [2023-08-30 15:29:39,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 733 places, 7837 transitions, 101542 flow. Second operand has 385 states, 385 states have (on average 83.01038961038961) internal successors, (31959), 385 states have internal predecessors, (31959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 15:29:39,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 15:29:39,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 173 [2023-08-30 15:29:39,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15