./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.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 c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 08:21:32,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 08:21:32,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 08:21:32,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 08:21:32,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 08:21:32,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 08:21:32,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 08:21:32,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 08:21:32,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 08:21:32,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 08:21:32,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 08:21:32,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 08:21:32,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 08:21:32,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 08:21:32,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 08:21:32,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 08:21:32,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 08:21:32,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 08:21:32,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 08:21:32,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 08:21:32,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 08:21:32,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 08:21:32,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 08:21:32,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 08:21:32,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 08:21:32,360 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 08:21:32,360 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 08:21:32,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 08:21:32,362 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 08:21:32,363 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 08:21:32,364 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 08:21:32,365 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 08:21:32,366 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 08:21:32,367 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 08:21:32,368 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 08:21:32,368 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 08:21:32,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 08:21:32,369 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 08:21:32,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 08:21:32,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 08:21:32,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 08:21:32,372 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 08:21:32,410 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 08:21:32,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 08:21:32,412 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 08:21:32,412 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 08:21:32,413 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 08:21:32,413 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 08:21:32,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 08:21:32,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 08:21:32,414 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 08:21:32,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 08:21:32,415 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 08:21:32,415 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 08:21:32,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 08:21:32,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 08:21:32,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 08:21:32,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 08:21:32,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 08:21:32,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 08:21:32,416 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 08:21:32,416 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 08:21:32,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 08:21:32,417 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 08:21:32,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 08:21:32,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 08:21:32,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 08:21:32,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 08:21:32,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:21:32,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 08:21:32,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 08:21:32,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 08:21:32,418 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 08:21:32,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 08:21:32,419 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 08:21:32,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 08:21:32,419 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 08:21:32,419 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 08:21:32,419 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 08:21:32,420 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 08:21:32,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 08:21:32,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 08:21:32,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 08:21:32,737 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 08:21:32,737 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 08:21:32,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-09-01 08:21:33,855 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 08:21:34,054 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 08:21:34,055 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-09-01 08:21:34,060 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1511b93f6/ab896059cb4d4d25a235e4f55710a616/FLAGf4ccf9da1 [2023-09-01 08:21:34,074 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1511b93f6/ab896059cb4d4d25a235e4f55710a616 [2023-09-01 08:21:34,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 08:21:34,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 08:21:34,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 08:21:34,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 08:21:34,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 08:21:34,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:21:34" (1/1) ... [2023-09-01 08:21:34,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eab873e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:34, skipping insertion in model container [2023-09-01 08:21:34,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:21:34" (1/1) ... [2023-09-01 08:21:34,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 08:21:34,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 08:21:34,282 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-nonblocking-cntr.wvr.c[2037,2050] [2023-09-01 08:21:34,284 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:21:34,293 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 08:21:34,324 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-nonblocking-cntr.wvr.c[2037,2050] [2023-09-01 08:21:34,325 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:21:34,343 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:21:34,344 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:21:34,350 INFO L208 MainTranslator]: Completed translation [2023-09-01 08:21:34,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:34 WrapperNode [2023-09-01 08:21:34,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 08:21:34,352 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 08:21:34,352 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 08:21:34,352 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 08:21:34,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:34" (1/1) ... [2023-09-01 08:21:34,376 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:34" (1/1) ... [2023-09-01 08:21:34,395 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2023-09-01 08:21:34,396 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 08:21:34,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 08:21:34,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 08:21:34,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 08:21:34,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:34" (1/1) ... [2023-09-01 08:21:34,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:34" (1/1) ... [2023-09-01 08:21:34,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:34" (1/1) ... [2023-09-01 08:21:34,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:34" (1/1) ... [2023-09-01 08:21:34,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:34" (1/1) ... [2023-09-01 08:21:34,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:34" (1/1) ... [2023-09-01 08:21:34,434 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:34" (1/1) ... [2023-09-01 08:21:34,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:34" (1/1) ... [2023-09-01 08:21:34,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 08:21:34,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 08:21:34,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 08:21:34,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 08:21:34,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:34" (1/1) ... [2023-09-01 08:21:34,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:21:34,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:34,474 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 08:21:34,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 08:21:34,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 08:21:34,521 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 08:21:34,521 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 08:21:34,521 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 08:21:34,521 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 08:21:34,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 08:21:34,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 08:21:34,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 08:21:34,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 08:21:34,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 08:21:34,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 08:21:34,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 08:21:34,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 08:21:34,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 08:21:34,524 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 08:21:34,633 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 08:21:34,636 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 08:21:34,883 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 08:21:34,976 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 08:21:34,978 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 08:21:34,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:21:34 BoogieIcfgContainer [2023-09-01 08:21:34,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 08:21:34,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 08:21:34,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 08:21:34,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 08:21:34,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 08:21:34" (1/3) ... [2023-09-01 08:21:34,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a0a1bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:21:34, skipping insertion in model container [2023-09-01 08:21:34,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:21:34" (2/3) ... [2023-09-01 08:21:34,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a0a1bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:21:34, skipping insertion in model container [2023-09-01 08:21:34,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:21:34" (3/3) ... [2023-09-01 08:21:34,987 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-09-01 08:21:34,994 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 08:21:35,003 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 08:21:35,003 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-09-01 08:21:35,004 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 08:21:35,060 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 08:21:35,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2023-09-01 08:21:35,154 INFO L130 PetriNetUnfolder]: 6/82 cut-off events. [2023-09-01 08:21:35,155 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 08:21:35,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 95 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2023-09-01 08:21:35,160 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2023-09-01 08:21:35,163 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 66 transitions, 141 flow [2023-09-01 08:21:35,166 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 08:21:35,173 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 66 transitions, 141 flow [2023-09-01 08:21:35,176 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 66 transitions, 141 flow [2023-09-01 08:21:35,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 141 flow [2023-09-01 08:21:35,193 INFO L130 PetriNetUnfolder]: 5/66 cut-off events. [2023-09-01 08:21:35,193 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 08:21:35,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 66 events. 5/66 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 94 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2023-09-01 08:21:35,195 INFO L119 LiptonReduction]: Number of co-enabled transitions 772 [2023-09-01 08:21:37,354 INFO L134 LiptonReduction]: Checked pairs total: 768 [2023-09-01 08:21:37,357 INFO L136 LiptonReduction]: Total number of compositions: 62 [2023-09-01 08:21:37,378 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 08:21:37,385 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;@5aba5c95, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 08:21:37,385 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-09-01 08:21:37,388 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2023-09-01 08:21:37,388 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 08:21:37,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:37,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 08:21:37,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:21:37,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:37,395 INFO L85 PathProgramCache]: Analyzing trace with hash 11048566, now seen corresponding path program 1 times [2023-09-01 08:21:37,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:37,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404564745] [2023-09-01 08:21:37,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:37,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:37,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:37,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404564745] [2023-09-01 08:21:37,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404564745] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:21:37,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:21:37,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:21:37,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786305674] [2023-09-01 08:21:37,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:21:37,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:21:37,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:37,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:21:37,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:21:37,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 146 [2023-09-01 08:21:37,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 51 flow. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:37,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:37,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 146 [2023-09-01 08:21:37,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:37,861 INFO L130 PetriNetUnfolder]: 231/351 cut-off events. [2023-09-01 08:21:37,862 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 08:21:37,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 351 events. 231/351 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 1289 event pairs, 39 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 619. Up to 306 conditions per place. [2023-09-01 08:21:37,868 INFO L137 encePairwiseOnDemand]: 136/146 looper letters, 22 selfloop transitions, 4 changer transitions 3/31 dead transitions. [2023-09-01 08:21:37,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 31 transitions, 135 flow [2023-09-01 08:21:37,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:21:37,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:21:37,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2023-09-01 08:21:37,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5342465753424658 [2023-09-01 08:21:37,880 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2023-09-01 08:21:37,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2023-09-01 08:21:37,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:37,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2023-09-01 08:21:37,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:37,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:37,891 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:37,893 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 51 flow. Second operand 3 states and 234 transitions. [2023-09-01 08:21:37,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 31 transitions, 135 flow [2023-09-01 08:21:37,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 31 transitions, 127 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 08:21:37,897 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 78 flow [2023-09-01 08:21:37,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2023-09-01 08:21:37,901 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2023-09-01 08:21:37,902 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 78 flow [2023-09-01 08:21:37,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:37,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:37,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 08:21:37,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 08:21:37,903 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:21:37,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:37,904 INFO L85 PathProgramCache]: Analyzing trace with hash 11048595, now seen corresponding path program 1 times [2023-09-01 08:21:37,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:37,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404426014] [2023-09-01 08:21:37,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:37,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:37,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:37,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404426014] [2023-09-01 08:21:37,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404426014] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:21:37,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:21:37,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:21:37,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739775651] [2023-09-01 08:21:37,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:21:37,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:21:37,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:37,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:21:37,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:21:37,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 146 [2023-09-01 08:21:37,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:37,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:37,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 146 [2023-09-01 08:21:37,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:38,031 INFO L130 PetriNetUnfolder]: 222/349 cut-off events. [2023-09-01 08:21:38,031 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-09-01 08:21:38,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 349 events. 222/349 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 1435 event pairs, 107 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 674. Up to 293 conditions per place. [2023-09-01 08:21:38,035 INFO L137 encePairwiseOnDemand]: 142/146 looper letters, 23 selfloop transitions, 2 changer transitions 3/29 dead transitions. [2023-09-01 08:21:38,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 29 transitions, 143 flow [2023-09-01 08:21:38,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:21:38,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:21:38,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-09-01 08:21:38,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136986301369864 [2023-09-01 08:21:38,037 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-09-01 08:21:38,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-09-01 08:21:38,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:38,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-09-01 08:21:38,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:38,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:38,041 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:38,041 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 78 flow. Second operand 3 states and 225 transitions. [2023-09-01 08:21:38,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 29 transitions, 143 flow [2023-09-01 08:21:38,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:21:38,043 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 70 flow [2023-09-01 08:21:38,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2023-09-01 08:21:38,044 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 0 predicate places. [2023-09-01 08:21:38,044 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 70 flow [2023-09-01 08:21:38,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:38,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:38,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 08:21:38,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 08:21:38,045 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:21:38,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:38,046 INFO L85 PathProgramCache]: Analyzing trace with hash 342506919, now seen corresponding path program 1 times [2023-09-01 08:21:38,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:38,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124189462] [2023-09-01 08:21:38,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:38,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:38,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:38,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124189462] [2023-09-01 08:21:38,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124189462] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:38,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364390833] [2023-09-01 08:21:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:38,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:38,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:38,106 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:21:38,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 08:21:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:38,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:21:38,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:38,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:38,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364390833] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:21:38,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:21:38,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 08:21:38,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560785316] [2023-09-01 08:21:38,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:21:38,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:21:38,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:38,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:21:38,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 08:21:38,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 146 [2023-09-01 08:21:38,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 70 flow. Second operand has 7 states, 7 states have (on average 66.42857142857143) internal successors, (465), 7 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:38,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:38,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 146 [2023-09-01 08:21:38,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:38,540 INFO L130 PetriNetUnfolder]: 660/991 cut-off events. [2023-09-01 08:21:38,540 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2023-09-01 08:21:38,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2545 conditions, 991 events. 660/991 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 4542 event pairs, 68 based on Foata normal form. 0/537 useless extension candidates. Maximal degree in co-relation 2008. Up to 503 conditions per place. [2023-09-01 08:21:38,550 INFO L137 encePairwiseOnDemand]: 142/146 looper letters, 69 selfloop transitions, 9 changer transitions 3/82 dead transitions. [2023-09-01 08:21:38,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 82 transitions, 416 flow [2023-09-01 08:21:38,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 08:21:38,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 08:21:38,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 539 transitions. [2023-09-01 08:21:38,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5273972602739726 [2023-09-01 08:21:38,555 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 539 transitions. [2023-09-01 08:21:38,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 539 transitions. [2023-09-01 08:21:38,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:38,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 539 transitions. [2023-09-01 08:21:38,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:38,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:38,562 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:38,562 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 70 flow. Second operand 7 states and 539 transitions. [2023-09-01 08:21:38,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 82 transitions, 416 flow [2023-09-01 08:21:38,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 82 transitions, 412 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 08:21:38,565 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 125 flow [2023-09-01 08:21:38,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=125, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2023-09-01 08:21:38,567 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2023-09-01 08:21:38,567 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 125 flow [2023-09-01 08:21:38,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.42857142857143) internal successors, (465), 7 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:38,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:38,568 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 08:21:38,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 08:21:38,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:38,774 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:21:38,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:38,774 INFO L85 PathProgramCache]: Analyzing trace with hash 2027780365, now seen corresponding path program 1 times [2023-09-01 08:21:38,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:38,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367994646] [2023-09-01 08:21:38,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:38,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 08:21:38,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:38,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367994646] [2023-09-01 08:21:38,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367994646] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:21:38,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:21:38,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:21:38,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697678981] [2023-09-01 08:21:38,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:21:38,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:21:38,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:38,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:21:38,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:21:38,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 146 [2023-09-01 08:21:38,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:38,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:38,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 146 [2023-09-01 08:21:38,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:38,962 INFO L130 PetriNetUnfolder]: 601/918 cut-off events. [2023-09-01 08:21:38,962 INFO L131 PetriNetUnfolder]: For 139/139 co-relation queries the response was YES. [2023-09-01 08:21:38,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2487 conditions, 918 events. 601/918 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 4353 event pairs, 139 based on Foata normal form. 28/623 useless extension candidates. Maximal degree in co-relation 2221. Up to 905 conditions per place. [2023-09-01 08:21:38,968 INFO L137 encePairwiseOnDemand]: 144/146 looper letters, 26 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-09-01 08:21:38,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 28 transitions, 164 flow [2023-09-01 08:21:38,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:21:38,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:21:38,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2023-09-01 08:21:38,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-09-01 08:21:38,970 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 219 transitions. [2023-09-01 08:21:38,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 219 transitions. [2023-09-01 08:21:38,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:38,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 219 transitions. [2023-09-01 08:21:38,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:38,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:38,973 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:38,973 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 125 flow. Second operand 3 states and 219 transitions. [2023-09-01 08:21:38,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 28 transitions, 164 flow [2023-09-01 08:21:38,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 28 transitions, 162 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:21:38,975 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 98 flow [2023-09-01 08:21:38,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-09-01 08:21:38,976 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2023-09-01 08:21:38,977 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 98 flow [2023-09-01 08:21:38,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:38,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:38,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 08:21:38,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 08:21:38,978 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:21:38,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:38,978 INFO L85 PathProgramCache]: Analyzing trace with hash 342506890, now seen corresponding path program 1 times [2023-09-01 08:21:38,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:38,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377611141] [2023-09-01 08:21:38,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:38,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:39,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:39,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377611141] [2023-09-01 08:21:39,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377611141] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:39,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824654022] [2023-09-01 08:21:39,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:39,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:39,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:39,018 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:21:39,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 08:21:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:39,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:21:39,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:39,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:39,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824654022] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:21:39,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:21:39,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-09-01 08:21:39,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124898467] [2023-09-01 08:21:39,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:21:39,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:21:39,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:39,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:21:39,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 08:21:39,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 146 [2023-09-01 08:21:39,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 98 flow. Second operand has 7 states, 7 states have (on average 67.57142857142857) internal successors, (473), 7 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:39,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:39,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 146 [2023-09-01 08:21:39,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:39,321 INFO L130 PetriNetUnfolder]: 771/1269 cut-off events. [2023-09-01 08:21:39,322 INFO L131 PetriNetUnfolder]: For 524/524 co-relation queries the response was YES. [2023-09-01 08:21:39,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3440 conditions, 1269 events. 771/1269 cut-off events. For 524/524 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6499 event pairs, 67 based on Foata normal form. 58/1049 useless extension candidates. Maximal degree in co-relation 3424. Up to 514 conditions per place. [2023-09-01 08:21:39,329 INFO L137 encePairwiseOnDemand]: 137/146 looper letters, 53 selfloop transitions, 34 changer transitions 3/92 dead transitions. [2023-09-01 08:21:39,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 92 transitions, 561 flow [2023-09-01 08:21:39,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 08:21:39,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 08:21:39,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 551 transitions. [2023-09-01 08:21:39,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5391389432485323 [2023-09-01 08:21:39,332 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 551 transitions. [2023-09-01 08:21:39,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 551 transitions. [2023-09-01 08:21:39,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:39,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 551 transitions. [2023-09-01 08:21:39,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.71428571428571) internal successors, (551), 7 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:39,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:39,336 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:39,336 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 98 flow. Second operand 7 states and 551 transitions. [2023-09-01 08:21:39,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 92 transitions, 561 flow [2023-09-01 08:21:39,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 92 transitions, 560 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:21:39,340 INFO L231 Difference]: Finished difference. Result has 42 places, 52 transitions, 452 flow [2023-09-01 08:21:39,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=452, PETRI_PLACES=42, PETRI_TRANSITIONS=52} [2023-09-01 08:21:39,341 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2023-09-01 08:21:39,341 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 52 transitions, 452 flow [2023-09-01 08:21:39,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 67.57142857142857) internal successors, (473), 7 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:39,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:39,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 08:21:39,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 08:21:39,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:39,547 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:21:39,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:39,548 INFO L85 PathProgramCache]: Analyzing trace with hash 342506892, now seen corresponding path program 1 times [2023-09-01 08:21:39,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:39,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389833900] [2023-09-01 08:21:39,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:39,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:39,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:39,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:39,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389833900] [2023-09-01 08:21:39,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389833900] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:39,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816787340] [2023-09-01 08:21:39,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:39,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:39,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:39,596 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:21:39,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 08:21:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:39,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:21:39,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:39,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:39,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:21:39,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816787340] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:21:39,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:21:39,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-09-01 08:21:39,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86379242] [2023-09-01 08:21:39,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:21:39,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:21:39,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:39,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:21:39,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 08:21:39,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 146 [2023-09-01 08:21:39,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 52 transitions, 452 flow. Second operand has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 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) [2023-09-01 08:21:39,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:39,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 146 [2023-09-01 08:21:39,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:39,837 INFO L130 PetriNetUnfolder]: 809/1367 cut-off events. [2023-09-01 08:21:39,838 INFO L131 PetriNetUnfolder]: For 2597/2597 co-relation queries the response was YES. [2023-09-01 08:21:39,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5320 conditions, 1367 events. 809/1367 cut-off events. For 2597/2597 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 7126 event pairs, 132 based on Foata normal form. 136/1377 useless extension candidates. Maximal degree in co-relation 5298. Up to 705 conditions per place. [2023-09-01 08:21:39,848 INFO L137 encePairwiseOnDemand]: 137/146 looper letters, 34 selfloop transitions, 29 changer transitions 0/65 dead transitions. [2023-09-01 08:21:39,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 65 transitions, 677 flow [2023-09-01 08:21:39,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:21:39,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:21:39,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 296 transitions. [2023-09-01 08:21:39,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068493150684932 [2023-09-01 08:21:39,851 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 296 transitions. [2023-09-01 08:21:39,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 296 transitions. [2023-09-01 08:21:39,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:39,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 296 transitions. [2023-09-01 08:21:39,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:39,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:39,854 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:39,854 INFO L175 Difference]: Start difference. First operand has 42 places, 52 transitions, 452 flow. Second operand 4 states and 296 transitions. [2023-09-01 08:21:39,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 65 transitions, 677 flow [2023-09-01 08:21:39,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 65 transitions, 619 flow, removed 29 selfloop flow, removed 0 redundant places. [2023-09-01 08:21:39,862 INFO L231 Difference]: Finished difference. Result has 46 places, 58 transitions, 613 flow [2023-09-01 08:21:39,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=613, PETRI_PLACES=46, PETRI_TRANSITIONS=58} [2023-09-01 08:21:39,863 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 20 predicate places. [2023-09-01 08:21:39,864 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 58 transitions, 613 flow [2023-09-01 08:21:39,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 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) [2023-09-01 08:21:39,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:39,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:21:39,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-09-01 08:21:40,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:40,070 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:21:40,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:40,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1221807622, now seen corresponding path program 1 times [2023-09-01 08:21:40,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:40,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310903243] [2023-09-01 08:21:40,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:40,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:40,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:40,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310903243] [2023-09-01 08:21:40,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310903243] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:21:40,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:21:40,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:21:40,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742899437] [2023-09-01 08:21:40,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:21:40,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:21:40,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:40,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:21:40,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:21:40,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 146 [2023-09-01 08:21:40,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 58 transitions, 613 flow. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:40,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:40,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 146 [2023-09-01 08:21:40,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:40,271 INFO L130 PetriNetUnfolder]: 841/1481 cut-off events. [2023-09-01 08:21:40,272 INFO L131 PetriNetUnfolder]: For 4047/4047 co-relation queries the response was YES. [2023-09-01 08:21:40,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6204 conditions, 1481 events. 841/1481 cut-off events. For 4047/4047 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8139 event pairs, 427 based on Foata normal form. 22/1359 useless extension candidates. Maximal degree in co-relation 6178. Up to 1297 conditions per place. [2023-09-01 08:21:40,285 INFO L137 encePairwiseOnDemand]: 142/146 looper letters, 69 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2023-09-01 08:21:40,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 75 transitions, 902 flow [2023-09-01 08:21:40,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:21:40,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:21:40,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 227 transitions. [2023-09-01 08:21:40,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182648401826484 [2023-09-01 08:21:40,287 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 227 transitions. [2023-09-01 08:21:40,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 227 transitions. [2023-09-01 08:21:40,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:40,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 227 transitions. [2023-09-01 08:21:40,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:40,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:40,290 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:40,290 INFO L175 Difference]: Start difference. First operand has 46 places, 58 transitions, 613 flow. Second operand 3 states and 227 transitions. [2023-09-01 08:21:40,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 75 transitions, 902 flow [2023-09-01 08:21:40,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 75 transitions, 829 flow, removed 36 selfloop flow, removed 1 redundant places. [2023-09-01 08:21:40,305 INFO L231 Difference]: Finished difference. Result has 48 places, 62 transitions, 629 flow [2023-09-01 08:21:40,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=629, PETRI_PLACES=48, PETRI_TRANSITIONS=62} [2023-09-01 08:21:40,306 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2023-09-01 08:21:40,306 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 62 transitions, 629 flow [2023-09-01 08:21:40,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:40,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:40,306 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-09-01 08:21:40,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 08:21:40,307 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:21:40,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:40,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1218200714, now seen corresponding path program 2 times [2023-09-01 08:21:40,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:40,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838433199] [2023-09-01 08:21:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:40,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:40,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:40,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838433199] [2023-09-01 08:21:40,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838433199] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:40,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586414919] [2023-09-01 08:21:40,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:21:40,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:40,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:40,391 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:21:40,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 08:21:40,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:21:40,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:21:40,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 08:21:40,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:40,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:40,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586414919] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:21:40,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:21:40,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-09-01 08:21:40,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686071577] [2023-09-01 08:21:40,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:21:40,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 08:21:40,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:40,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 08:21:40,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 08:21:40,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 146 [2023-09-01 08:21:40,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 62 transitions, 629 flow. Second operand has 13 states, 13 states have (on average 67.3076923076923) internal successors, (875), 13 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:40,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:40,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 146 [2023-09-01 08:21:40,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:41,081 INFO L130 PetriNetUnfolder]: 1985/3499 cut-off events. [2023-09-01 08:21:41,081 INFO L131 PetriNetUnfolder]: For 10062/10144 co-relation queries the response was YES. [2023-09-01 08:21:41,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13825 conditions, 3499 events. 1985/3499 cut-off events. For 10062/10144 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22642 event pairs, 171 based on Foata normal form. 464/3345 useless extension candidates. Maximal degree in co-relation 13798. Up to 951 conditions per place. [2023-09-01 08:21:41,107 INFO L137 encePairwiseOnDemand]: 138/146 looper letters, 105 selfloop transitions, 143 changer transitions 3/253 dead transitions. [2023-09-01 08:21:41,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 253 transitions, 2464 flow [2023-09-01 08:21:41,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 08:21:41,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 08:21:41,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1023 transitions. [2023-09-01 08:21:41,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5389884088514225 [2023-09-01 08:21:41,110 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1023 transitions. [2023-09-01 08:21:41,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1023 transitions. [2023-09-01 08:21:41,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:41,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1023 transitions. [2023-09-01 08:21:41,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 78.6923076923077) internal successors, (1023), 13 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:41,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 146.0) internal successors, (2044), 14 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:41,117 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 146.0) internal successors, (2044), 14 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:41,117 INFO L175 Difference]: Start difference. First operand has 48 places, 62 transitions, 629 flow. Second operand 13 states and 1023 transitions. [2023-09-01 08:21:41,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 253 transitions, 2464 flow [2023-09-01 08:21:41,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 253 transitions, 2452 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:21:41,147 INFO L231 Difference]: Finished difference. Result has 70 places, 178 transitions, 2448 flow [2023-09-01 08:21:41,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2448, PETRI_PLACES=70, PETRI_TRANSITIONS=178} [2023-09-01 08:21:41,147 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 44 predicate places. [2023-09-01 08:21:41,148 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 178 transitions, 2448 flow [2023-09-01 08:21:41,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 67.3076923076923) internal successors, (875), 13 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:41,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:41,148 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-09-01 08:21:41,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 08:21:41,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:41,354 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:21:41,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:41,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1218200685, now seen corresponding path program 2 times [2023-09-01 08:21:41,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:41,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341139529] [2023-09-01 08:21:41,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:41,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:41,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:41,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:41,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341139529] [2023-09-01 08:21:41,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341139529] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:41,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935026875] [2023-09-01 08:21:41,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:21:41,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:41,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:41,445 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:21:41,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 08:21:41,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:21:41,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:21:41,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:21:41,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 08:21:41,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:21:41,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935026875] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:21:41,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:21:41,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-09-01 08:21:41,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659953845] [2023-09-01 08:21:41,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:21:41,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:21:41,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:41,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:21:41,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 08:21:41,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 146 [2023-09-01 08:21:41,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 178 transitions, 2448 flow. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:41,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:41,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 146 [2023-09-01 08:21:41,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:41,863 INFO L130 PetriNetUnfolder]: 1295/2296 cut-off events. [2023-09-01 08:21:41,864 INFO L131 PetriNetUnfolder]: For 12187/12251 co-relation queries the response was YES. [2023-09-01 08:21:41,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10443 conditions, 2296 events. 1295/2296 cut-off events. For 12187/12251 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13844 event pairs, 841 based on Foata normal form. 118/2306 useless extension candidates. Maximal degree in co-relation 10404. Up to 2292 conditions per place. [2023-09-01 08:21:41,881 INFO L137 encePairwiseOnDemand]: 143/146 looper letters, 122 selfloop transitions, 1 changer transitions 0/125 dead transitions. [2023-09-01 08:21:41,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 125 transitions, 1960 flow [2023-09-01 08:21:41,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:21:41,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:21:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 211 transitions. [2023-09-01 08:21:41,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817351598173516 [2023-09-01 08:21:41,883 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 211 transitions. [2023-09-01 08:21:41,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 211 transitions. [2023-09-01 08:21:41,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:41,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 211 transitions. [2023-09-01 08:21:41,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:41,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:41,885 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:41,885 INFO L175 Difference]: Start difference. First operand has 70 places, 178 transitions, 2448 flow. Second operand 3 states and 211 transitions. [2023-09-01 08:21:41,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 125 transitions, 1960 flow [2023-09-01 08:21:41,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 125 transitions, 1745 flow, removed 88 selfloop flow, removed 4 redundant places. [2023-09-01 08:21:41,925 INFO L231 Difference]: Finished difference. Result has 66 places, 125 transitions, 1501 flow [2023-09-01 08:21:41,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=1499, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1501, PETRI_PLACES=66, PETRI_TRANSITIONS=125} [2023-09-01 08:21:41,926 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 40 predicate places. [2023-09-01 08:21:41,926 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 125 transitions, 1501 flow [2023-09-01 08:21:41,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:41,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:41,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:21:41,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 08:21:42,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:42,133 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:21:42,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:42,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1558246076, now seen corresponding path program 1 times [2023-09-01 08:21:42,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:42,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663131144] [2023-09-01 08:21:42,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:42,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:42,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:42,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663131144] [2023-09-01 08:21:42,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663131144] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:42,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264405290] [2023-09-01 08:21:42,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:42,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:42,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:42,193 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:21:42,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 08:21:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:42,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 08:21:42,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:42,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:42,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264405290] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:42,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 08:21:42,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2023-09-01 08:21:42,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209226134] [2023-09-01 08:21:42,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:21:42,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 08:21:42,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:42,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 08:21:42,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-09-01 08:21:42,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 146 [2023-09-01 08:21:42,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 125 transitions, 1501 flow. Second operand has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 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) [2023-09-01 08:21:42,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:42,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 146 [2023-09-01 08:21:42,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:42,708 INFO L130 PetriNetUnfolder]: 1083/1901 cut-off events. [2023-09-01 08:21:42,709 INFO L131 PetriNetUnfolder]: For 8185/8185 co-relation queries the response was YES. [2023-09-01 08:21:42,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7367 conditions, 1901 events. 1083/1901 cut-off events. For 8185/8185 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10429 event pairs, 257 based on Foata normal form. 122/2021 useless extension candidates. Maximal degree in co-relation 7336. Up to 1714 conditions per place. [2023-09-01 08:21:42,725 INFO L137 encePairwiseOnDemand]: 142/146 looper letters, 110 selfloop transitions, 4 changer transitions 0/115 dead transitions. [2023-09-01 08:21:42,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 115 transitions, 1491 flow [2023-09-01 08:21:42,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 08:21:42,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 08:21:42,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 285 transitions. [2023-09-01 08:21:42,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.488013698630137 [2023-09-01 08:21:42,727 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 285 transitions. [2023-09-01 08:21:42,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 285 transitions. [2023-09-01 08:21:42,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:42,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 285 transitions. [2023-09-01 08:21:42,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:42,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:42,730 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:42,730 INFO L175 Difference]: Start difference. First operand has 66 places, 125 transitions, 1501 flow. Second operand 4 states and 285 transitions. [2023-09-01 08:21:42,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 115 transitions, 1491 flow [2023-09-01 08:21:42,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 115 transitions, 1472 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-09-01 08:21:42,749 INFO L231 Difference]: Finished difference. Result has 66 places, 98 transitions, 1149 flow [2023-09-01 08:21:42,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1149, PETRI_PLACES=66, PETRI_TRANSITIONS=98} [2023-09-01 08:21:42,750 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 40 predicate places. [2023-09-01 08:21:42,750 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 98 transitions, 1149 flow [2023-09-01 08:21:42,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 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) [2023-09-01 08:21:42,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:42,751 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-09-01 08:21:42,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 08:21:42,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:42,956 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:21:42,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:42,956 INFO L85 PathProgramCache]: Analyzing trace with hash 846119670, now seen corresponding path program 3 times [2023-09-01 08:21:42,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:42,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597558821] [2023-09-01 08:21:42,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:42,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:43,099 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:43,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:43,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597558821] [2023-09-01 08:21:43,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597558821] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:43,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447063052] [2023-09-01 08:21:43,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 08:21:43,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:43,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:43,105 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:21:43,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 08:21:43,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 08:21:43,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:21:43,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 08:21:43,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:43,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:43,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447063052] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:21:43,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:21:43,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-09-01 08:21:43,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643181736] [2023-09-01 08:21:43,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:21:43,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 08:21:43,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:43,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 08:21:43,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-09-01 08:21:43,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 146 [2023-09-01 08:21:43,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 98 transitions, 1149 flow. Second operand has 25 states, 25 states have (on average 67.16) internal successors, (1679), 25 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:43,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:43,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 146 [2023-09-01 08:21:43,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:44,241 INFO L130 PetriNetUnfolder]: 2530/4448 cut-off events. [2023-09-01 08:21:44,241 INFO L131 PetriNetUnfolder]: For 61874/62008 co-relation queries the response was YES. [2023-09-01 08:21:44,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16161 conditions, 4448 events. 2530/4448 cut-off events. For 61874/62008 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 26257 event pairs, 277 based on Foata normal form. 712/5154 useless extension candidates. Maximal degree in co-relation 16132. Up to 905 conditions per place. [2023-09-01 08:21:44,262 INFO L137 encePairwiseOnDemand]: 141/146 looper letters, 117 selfloop transitions, 242 changer transitions 69/431 dead transitions. [2023-09-01 08:21:44,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 431 transitions, 4157 flow [2023-09-01 08:21:44,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 08:21:44,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 08:21:44,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1912 transitions. [2023-09-01 08:21:44,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238356164383562 [2023-09-01 08:21:44,268 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1912 transitions. [2023-09-01 08:21:44,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1912 transitions. [2023-09-01 08:21:44,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:44,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1912 transitions. [2023-09-01 08:21:44,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 76.48) internal successors, (1912), 25 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:44,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 146.0) internal successors, (3796), 26 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:44,322 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 146.0) internal successors, (3796), 26 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:44,322 INFO L175 Difference]: Start difference. First operand has 66 places, 98 transitions, 1149 flow. Second operand 25 states and 1912 transitions. [2023-09-01 08:21:44,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 431 transitions, 4157 flow [2023-09-01 08:21:44,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 431 transitions, 4157 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 08:21:44,357 INFO L231 Difference]: Finished difference. Result has 112 places, 272 transitions, 4044 flow [2023-09-01 08:21:44,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4044, PETRI_PLACES=112, PETRI_TRANSITIONS=272} [2023-09-01 08:21:44,357 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 86 predicate places. [2023-09-01 08:21:44,358 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 272 transitions, 4044 flow [2023-09-01 08:21:44,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 67.16) internal successors, (1679), 25 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:44,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:44,359 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2023-09-01 08:21:44,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 08:21:44,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:44,564 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:21:44,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:44,564 INFO L85 PathProgramCache]: Analyzing trace with hash -785255946, now seen corresponding path program 4 times [2023-09-01 08:21:44,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:44,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046119753] [2023-09-01 08:21:44,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:44,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:45,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:45,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046119753] [2023-09-01 08:21:45,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046119753] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:45,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669037994] [2023-09-01 08:21:45,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 08:21:45,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:45,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:45,073 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:21:45,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 08:21:45,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 08:21:45,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:21:45,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 08:21:45,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:45,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:45,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669037994] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:21:45,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:21:45,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2023-09-01 08:21:45,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481575501] [2023-09-01 08:21:45,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:21:45,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-09-01 08:21:45,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:45,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-09-01 08:21:45,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-09-01 08:21:46,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 146 [2023-09-01 08:21:46,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 272 transitions, 4044 flow. Second operand has 49 states, 49 states have (on average 67.08163265306122) internal successors, (3287), 49 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:46,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:46,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 146 [2023-09-01 08:21:46,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:21:49,407 INFO L130 PetriNetUnfolder]: 7954/13964 cut-off events. [2023-09-01 08:21:49,407 INFO L131 PetriNetUnfolder]: For 732354/732632 co-relation queries the response was YES. [2023-09-01 08:21:49,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57847 conditions, 13964 events. 7954/13964 cut-off events. For 732354/732632 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 91218 event pairs, 893 based on Foata normal form. 1504/15462 useless extension candidates. Maximal degree in co-relation 57794. Up to 4005 conditions per place. [2023-09-01 08:21:49,482 INFO L137 encePairwiseOnDemand]: 141/146 looper letters, 215 selfloop transitions, 882 changer transitions 141/1241 dead transitions. [2023-09-01 08:21:49,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 1241 transitions, 15744 flow [2023-09-01 08:21:49,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-09-01 08:21:49,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-09-01 08:21:49,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3760 transitions. [2023-09-01 08:21:49,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5255800950517193 [2023-09-01 08:21:49,495 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3760 transitions. [2023-09-01 08:21:49,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3760 transitions. [2023-09-01 08:21:49,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:21:49,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3760 transitions. [2023-09-01 08:21:49,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 76.73469387755102) internal successors, (3760), 49 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:49,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 146.0) internal successors, (7300), 50 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:49,521 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 146.0) internal successors, (7300), 50 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:49,521 INFO L175 Difference]: Start difference. First operand has 112 places, 272 transitions, 4044 flow. Second operand 49 states and 3760 transitions. [2023-09-01 08:21:49,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 1241 transitions, 15744 flow [2023-09-01 08:21:49,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 1241 transitions, 13461 flow, removed 1134 selfloop flow, removed 2 redundant places. [2023-09-01 08:21:49,845 INFO L231 Difference]: Finished difference. Result has 204 places, 914 transitions, 14048 flow [2023-09-01 08:21:49,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=3727, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=14048, PETRI_PLACES=204, PETRI_TRANSITIONS=914} [2023-09-01 08:21:49,846 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 178 predicate places. [2023-09-01 08:21:49,846 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 914 transitions, 14048 flow [2023-09-01 08:21:49,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 67.08163265306122) internal successors, (3287), 49 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:49,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:21:49,848 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1] [2023-09-01 08:21:49,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 08:21:50,054 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,SelfDestructingSolverStorable11 [2023-09-01 08:21:50,054 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:21:50,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:21:50,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1785933834, now seen corresponding path program 5 times [2023-09-01 08:21:50,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:21:50,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62920655] [2023-09-01 08:21:50,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:21:50,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:21:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:21:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:51,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:21:51,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62920655] [2023-09-01 08:21:51,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62920655] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:21:51,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205700767] [2023-09-01 08:21:51,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 08:21:51,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:21:51,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:21:51,601 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:21:51,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 08:21:51,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-09-01 08:21:51,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:21:51,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 08:21:51,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:21:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:51,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:21:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:21:54,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205700767] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:21:54,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:21:54,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2023-09-01 08:21:54,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623298409] [2023-09-01 08:21:54,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:21:54,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-09-01 08:21:54,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:21:54,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-09-01 08:21:54,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-09-01 08:21:54,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 146 [2023-09-01 08:21:54,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 914 transitions, 14048 flow. Second operand has 97 states, 97 states have (on average 67.04123711340206) internal successors, (6503), 97 states have internal predecessors, (6503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:21:54,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:21:54,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 146 [2023-09-01 08:21:54,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:22:11,972 INFO L130 PetriNetUnfolder]: 28066/49208 cut-off events. [2023-09-01 08:22:11,972 INFO L131 PetriNetUnfolder]: For 7521339/7521905 co-relation queries the response was YES. [2023-09-01 08:22:12,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205567 conditions, 49208 events. 28066/49208 cut-off events. For 7521339/7521905 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 359794 event pairs, 3285 based on Foata normal form. 3088/52290 useless extension candidates. Maximal degree in co-relation 205468. Up to 13821 conditions per place. [2023-09-01 08:22:12,646 INFO L137 encePairwiseOnDemand]: 141/146 looper letters, 409 selfloop transitions, 3322 changer transitions 285/4019 dead transitions. [2023-09-01 08:22:12,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 4019 transitions, 56156 flow [2023-09-01 08:22:12,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-09-01 08:22:12,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-09-01 08:22:12,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 7456 transitions. [2023-09-01 08:22:12,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264793108318034 [2023-09-01 08:22:12,660 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 7456 transitions. [2023-09-01 08:22:12,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 7456 transitions. [2023-09-01 08:22:12,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:22:12,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 7456 transitions. [2023-09-01 08:22:12,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 76.8659793814433) internal successors, (7456), 97 states have internal predecessors, (7456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:12,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 146.0) internal successors, (14308), 98 states have internal predecessors, (14308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:12,709 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 146.0) internal successors, (14308), 98 states have internal predecessors, (14308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:12,709 INFO L175 Difference]: Start difference. First operand has 204 places, 914 transitions, 14048 flow. Second operand 97 states and 7456 transitions. [2023-09-01 08:22:12,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 4019 transitions, 56156 flow [2023-09-01 08:22:15,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 4019 transitions, 47128 flow, removed 4326 selfloop flow, removed 11 redundant places. [2023-09-01 08:22:15,415 INFO L231 Difference]: Finished difference. Result has 383 places, 3356 transitions, 51439 flow [2023-09-01 08:22:15,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=12986, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=914, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=890, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=51439, PETRI_PLACES=383, PETRI_TRANSITIONS=3356} [2023-09-01 08:22:15,417 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 357 predicate places. [2023-09-01 08:22:15,418 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 3356 transitions, 51439 flow [2023-09-01 08:22:15,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 67.04123711340206) internal successors, (6503), 97 states have internal predecessors, (6503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:15,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:22:15,420 INFO L208 CegarLoopForPetriNet]: trace histogram [94, 1, 1, 1, 1] [2023-09-01 08:22:15,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 08:22:15,626 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,SelfDestructingSolverStorable12 [2023-09-01 08:22:15,627 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:22:15,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:22:15,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1969976330, now seen corresponding path program 6 times [2023-09-01 08:22:15,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:22:15,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460674148] [2023-09-01 08:22:15,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:22:15,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:22:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:22:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:22:20,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:22:20,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460674148] [2023-09-01 08:22:20,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460674148] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:22:20,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173901615] [2023-09-01 08:22:20,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 08:22:20,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:22:20,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:22:20,401 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:22:20,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 08:22:20,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2023-09-01 08:22:20,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:22:20,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 97 conjunts are in the unsatisfiable core [2023-09-01 08:22:20,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:22:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:22:20,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:22:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:22:29,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173901615] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:22:29,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:22:29,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 191 [2023-09-01 08:22:29,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903730625] [2023-09-01 08:22:29,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:22:29,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-09-01 08:22:29,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:22:29,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-09-01 08:22:29,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2023-09-01 08:22:29,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 146 [2023-09-01 08:22:29,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 3356 transitions, 51439 flow. Second operand has 193 states, 193 states have (on average 67.02072538860104) internal successors, (12935), 193 states have internal predecessors, (12935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:22:29,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:22:29,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 146 [2023-09-01 08:22:29,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:25:25,980 INFO L130 PetriNetUnfolder]: 105202/184292 cut-off events. [2023-09-01 08:25:25,980 INFO L131 PetriNetUnfolder]: For 64012801/64013943 co-relation queries the response was YES. [2023-09-01 08:25:35,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770080 conditions, 184292 events. 105202/184292 cut-off events. For 64012801/64013943 co-relation queries the response was YES. Maximal size of possible extension queue 1146. Compared 1503780 event pairs, 12685 based on Foata normal form. 6256/190542 useless extension candidates. Maximal degree in co-relation 769896. Up to 50733 conditions per place. [2023-09-01 08:25:35,994 INFO L137 encePairwiseOnDemand]: 141/146 looper letters, 795 selfloop transitions, 12818 changer transitions 573/14189 dead transitions. [2023-09-01 08:25:35,994 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 14189 transitions, 210247 flow [2023-09-01 08:25:35,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2023-09-01 08:25:35,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2023-09-01 08:25:36,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 14848 transitions. [2023-09-01 08:25:36,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5269359074455249 [2023-09-01 08:25:36,075 INFO L72 ComplementDD]: Start complementDD. Operand 193 states and 14848 transitions. [2023-09-01 08:25:36,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 193 states and 14848 transitions. [2023-09-01 08:25:36,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:25:36,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 193 states and 14848 transitions. [2023-09-01 08:25:36,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 194 states, 193 states have (on average 76.93264248704664) internal successors, (14848), 193 states have internal predecessors, (14848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:25:36,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 194 states, 194 states have (on average 146.0) internal successors, (28324), 194 states have internal predecessors, (28324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:25:36,293 INFO L81 ComplementDD]: Finished complementDD. Result has 194 states, 194 states have (on average 146.0) internal successors, (28324), 194 states have internal predecessors, (28324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:25:36,293 INFO L175 Difference]: Start difference. First operand has 383 places, 3356 transitions, 51439 flow. Second operand 193 states and 14848 transitions. [2023-09-01 08:25:36,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 14189 transitions, 210247 flow [2023-09-01 08:27:24,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 14189 transitions, 175243 flow, removed 16734 selfloop flow, removed 23 redundant places. [2023-09-01 08:27:24,200 INFO L231 Difference]: Finished difference. Result has 742 places, 12854 transitions, 196238 flow [2023-09-01 08:27:24,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=48497, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=193, PETRI_FLOW=196238, PETRI_PLACES=742, PETRI_TRANSITIONS=12854} [2023-09-01 08:27:24,203 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 716 predicate places. [2023-09-01 08:27:24,203 INFO L495 AbstractCegarLoop]: Abstraction has has 742 places, 12854 transitions, 196238 flow [2023-09-01 08:27:24,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 67.02072538860104) internal successors, (12935), 193 states have internal predecessors, (12935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:27:24,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:27:24,207 INFO L208 CegarLoopForPetriNet]: trace histogram [190, 1, 1, 1, 1] [2023-09-01 08:27:24,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 08:27:24,417 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,SelfDestructingSolverStorable13 [2023-09-01 08:27:24,417 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-09-01 08:27:24,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:27:24,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1377041418, now seen corresponding path program 7 times [2023-09-01 08:27:24,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:27:24,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431965904] [2023-09-01 08:27:24,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:27:24,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:27:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:27:40,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:27:40,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431965904] [2023-09-01 08:27:40,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431965904] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:27:40,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65334889] [2023-09-01 08:27:40,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 08:27:40,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:27:40,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:27:40,794 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 08:27:40,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 08:27:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:27:41,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 1779 conjuncts, 193 conjunts are in the unsatisfiable core [2023-09-01 08:27:41,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:27:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:27:41,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:28:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:28:14,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65334889] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:28:14,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:28:14,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 383 [2023-09-01 08:28:14,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886631847] [2023-09-01 08:28:14,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:28:14,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2023-09-01 08:28:14,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:28:14,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2023-09-01 08:28:14,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2023-09-01 08:28:17,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 146 [2023-09-01 08:28:17,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 742 places, 12854 transitions, 196238 flow. Second operand has 385 states, 385 states have (on average 67.01038961038961) internal successors, (25799), 385 states have internal predecessors, (25799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:28:17,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:28:17,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 146 [2023-09-01 08:28:17,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15