./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/weaver/popl20-difference-det.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-difference-det.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 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e --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 08:05:59,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 08:05:59,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 08:05:59,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 08:05:59,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 08:05:59,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 08:05:59,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 08:05:59,293 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 08:05:59,294 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 08:05:59,295 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 08:05:59,296 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 08:05:59,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 08:05:59,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 08:05:59,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 08:05:59,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 08:05:59,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 08:05:59,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 08:05:59,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 08:05:59,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 08:05:59,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 08:05:59,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 08:05:59,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 08:05:59,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 08:05:59,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 08:05:59,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 08:05:59,324 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 08:05:59,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 08:05:59,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 08:05:59,326 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 08:05:59,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 08:05:59,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 08:05:59,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 08:05:59,330 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 08:05:59,331 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 08:05:59,332 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 08:05:59,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 08:05:59,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 08:05:59,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 08:05:59,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 08:05:59,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 08:05:59,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 08:05:59,342 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 08:05:59,372 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 08:05:59,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 08:05:59,373 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 08:05:59,373 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 08:05:59,374 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 08:05:59,374 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 08:05:59,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 08:05:59,375 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 08:05:59,376 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 08:05:59,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 08:05:59,377 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 08:05:59,377 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 08:05:59,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 08:05:59,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 08:05:59,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 08:05:59,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 08:05:59,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 08:05:59,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 08:05:59,378 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 08:05:59,378 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 08:05:59,379 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 08:05:59,379 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 08:05:59,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 08:05:59,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 08:05:59,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 08:05:59,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 08:05:59,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:05:59,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 08:05:59,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 08:05:59,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 08:05:59,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 08:05:59,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 08:05:59,381 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 08:05:59,381 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 08:05:59,381 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 08:05:59,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 08:05:59,382 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 08:05:59,382 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 08:05:59,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 08:05:59,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 08:05:59,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 08:05:59,750 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 08:05:59,750 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 08:05:59,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-09-01 08:06:01,005 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 08:06:01,191 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 08:06:01,192 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-09-01 08:06:01,198 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c13b886bd/0eda00a0e84c437ba482157c7ec674cb/FLAGe281ce028 [2023-09-01 08:06:01,215 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c13b886bd/0eda00a0e84c437ba482157c7ec674cb [2023-09-01 08:06:01,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 08:06:01,221 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 08:06:01,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 08:06:01,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 08:06:01,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 08:06:01,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:06:01" (1/1) ... [2023-09-01 08:06:01,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f7f5ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:01, skipping insertion in model container [2023-09-01 08:06:01,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 08:06:01" (1/1) ... [2023-09-01 08:06:01,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 08:06:01,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 08:06:01,443 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-difference-det.wvr.c[2507,2520] [2023-09-01 08:06:01,448 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:06:01,457 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 08:06:01,496 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-difference-det.wvr.c[2507,2520] [2023-09-01 08:06:01,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 08:06:01,508 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:06:01,509 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 08:06:01,515 INFO L208 MainTranslator]: Completed translation [2023-09-01 08:06:01,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:01 WrapperNode [2023-09-01 08:06:01,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 08:06:01,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 08:06:01,518 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 08:06:01,518 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 08:06:01,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:01" (1/1) ... [2023-09-01 08:06:01,539 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:01" (1/1) ... [2023-09-01 08:06:01,576 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 130 [2023-09-01 08:06:01,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 08:06:01,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 08:06:01,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 08:06:01,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 08:06:01,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:01" (1/1) ... [2023-09-01 08:06:01,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:01" (1/1) ... [2023-09-01 08:06:01,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:01" (1/1) ... [2023-09-01 08:06:01,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:01" (1/1) ... [2023-09-01 08:06:01,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:01" (1/1) ... [2023-09-01 08:06:01,608 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:01" (1/1) ... [2023-09-01 08:06:01,609 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:01" (1/1) ... [2023-09-01 08:06:01,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:01" (1/1) ... [2023-09-01 08:06:01,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 08:06:01,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 08:06:01,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 08:06:01,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 08:06:01,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:01" (1/1) ... [2023-09-01 08:06:01,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 08:06:01,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:01,646 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 08:06:01,650 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 08:06:01,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 08:06:01,679 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 08:06:01,680 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 08:06:01,680 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 08:06:01,680 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 08:06:01,680 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 08:06:01,680 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 08:06:01,680 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 08:06:01,680 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 08:06:01,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 08:06:01,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 08:06:01,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 08:06:01,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 08:06:01,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 08:06:01,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 08:06:01,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 08:06:01,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 08:06:01,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 08:06:01,683 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 08:06:01,764 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 08:06:01,766 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 08:06:02,100 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 08:06:02,247 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 08:06:02,247 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 08:06:02,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:06:02 BoogieIcfgContainer [2023-09-01 08:06:02,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 08:06:02,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 08:06:02,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 08:06:02,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 08:06:02,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 08:06:01" (1/3) ... [2023-09-01 08:06:02,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587a8e53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:06:02, skipping insertion in model container [2023-09-01 08:06:02,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 08:06:01" (2/3) ... [2023-09-01 08:06:02,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587a8e53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 08:06:02, skipping insertion in model container [2023-09-01 08:06:02,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 08:06:02" (3/3) ... [2023-09-01 08:06:02,264 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2023-09-01 08:06:02,271 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 08:06:02,279 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 08:06:02,280 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-09-01 08:06:02,280 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 08:06:02,398 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 08:06:02,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 147 transitions, 326 flow [2023-09-01 08:06:02,532 INFO L130 PetriNetUnfolder]: 9/143 cut-off events. [2023-09-01 08:06:02,533 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 08:06:02,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 143 events. 9/143 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 198 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-09-01 08:06:02,539 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 147 transitions, 326 flow [2023-09-01 08:06:02,550 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 123 transitions, 267 flow [2023-09-01 08:06:02,554 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 08:06:02,563 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 123 transitions, 267 flow [2023-09-01 08:06:02,566 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 123 transitions, 267 flow [2023-09-01 08:06:02,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 123 transitions, 267 flow [2023-09-01 08:06:02,622 INFO L130 PetriNetUnfolder]: 8/123 cut-off events. [2023-09-01 08:06:02,622 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 08:06:02,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 123 events. 8/123 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 197 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-09-01 08:06:02,628 INFO L119 LiptonReduction]: Number of co-enabled transitions 5184 [2023-09-01 08:06:06,579 INFO L134 LiptonReduction]: Checked pairs total: 5873 [2023-09-01 08:06:06,579 INFO L136 LiptonReduction]: Total number of compositions: 107 [2023-09-01 08:06:06,591 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 08:06:06,596 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;@5e9ac837, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 08:06:06,597 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2023-09-01 08:06:06,600 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2023-09-01 08:06:06,600 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 08:06:06,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:06,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 08:06:06,601 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-09-01 08:06:06,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:06,604 INFO L85 PathProgramCache]: Analyzing trace with hash 18815922, now seen corresponding path program 1 times [2023-09-01 08:06:06,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:06,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343863079] [2023-09-01 08:06:06,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:06,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:06,879 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 08:06:06,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:06,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343863079] [2023-09-01 08:06:06,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343863079] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:06,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:06:06,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:06:06,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906545704] [2023-09-01 08:06:06,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:06,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:06:06,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:06,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:06:06,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:06:06,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 254 [2023-09-01 08:06:06,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:06,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:06,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 254 [2023-09-01 08:06:06,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:08,927 INFO L130 PetriNetUnfolder]: 21542/25755 cut-off events. [2023-09-01 08:06:08,928 INFO L131 PetriNetUnfolder]: For 427/427 co-relation queries the response was YES. [2023-09-01 08:06:08,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52112 conditions, 25755 events. 21542/25755 cut-off events. For 427/427 co-relation queries the response was YES. Maximal size of possible extension queue 1706. Compared 108892 event pairs, 10472 based on Foata normal form. 0/6846 useless extension candidates. Maximal degree in co-relation 44904. Up to 25461 conditions per place. [2023-09-01 08:06:09,169 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 35 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-09-01 08:06:09,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 40 transitions, 173 flow [2023-09-01 08:06:09,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:06:09,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:06:09,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 399 transitions. [2023-09-01 08:06:09,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5236220472440944 [2023-09-01 08:06:09,184 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 399 transitions. [2023-09-01 08:06:09,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 399 transitions. [2023-09-01 08:06:09,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:09,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 399 transitions. [2023-09-01 08:06:09,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:09,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:09,197 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:09,199 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 107 flow. Second operand 3 states and 399 transitions. [2023-09-01 08:06:09,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 40 transitions, 173 flow [2023-09-01 08:06:09,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 160 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-09-01 08:06:09,230 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 90 flow [2023-09-01 08:06:09,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-09-01 08:06:09,235 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -8 predicate places. [2023-09-01 08:06:09,235 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 90 flow [2023-09-01 08:06:09,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:09,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:09,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 08:06:09,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 08:06:09,237 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-09-01 08:06:09,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:09,238 INFO L85 PathProgramCache]: Analyzing trace with hash 18815991, now seen corresponding path program 1 times [2023-09-01 08:06:09,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:09,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62258693] [2023-09-01 08:06:09,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:09,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:09,309 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 08:06:09,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:09,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62258693] [2023-09-01 08:06:09,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62258693] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:09,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:06:09,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:06:09,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223588237] [2023-09-01 08:06:09,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:09,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:06:09,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:09,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:06:09,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:06:09,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-09-01 08:06:09,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:09,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:09,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-09-01 08:06:09,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:11,576 INFO L130 PetriNetUnfolder]: 31787/38406 cut-off events. [2023-09-01 08:06:11,577 INFO L131 PetriNetUnfolder]: For 251/251 co-relation queries the response was YES. [2023-09-01 08:06:11,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77346 conditions, 38406 events. 31787/38406 cut-off events. For 251/251 co-relation queries the response was YES. Maximal size of possible extension queue 2548. Compared 177565 event pairs, 7655 based on Foata normal form. 0/11246 useless extension candidates. Maximal degree in co-relation 77340. Up to 23318 conditions per place. [2023-09-01 08:06:11,798 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 67 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-09-01 08:06:11,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 72 transitions, 299 flow [2023-09-01 08:06:11,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:06:11,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:06:11,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2023-09-01 08:06:11,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616797900262467 [2023-09-01 08:06:11,803 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2023-09-01 08:06:11,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2023-09-01 08:06:11,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:11,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2023-09-01 08:06:11,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:11,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:11,810 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:11,810 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 90 flow. Second operand 3 states and 428 transitions. [2023-09-01 08:06:11,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 72 transitions, 299 flow [2023-09-01 08:06:11,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 72 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:06:11,812 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 103 flow [2023-09-01 08:06:11,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-09-01 08:06:11,813 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2023-09-01 08:06:11,814 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 103 flow [2023-09-01 08:06:11,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:11,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:11,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 08:06:11,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 08:06:11,815 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-09-01 08:06:11,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:11,819 INFO L85 PathProgramCache]: Analyzing trace with hash 18815923, now seen corresponding path program 1 times [2023-09-01 08:06:11,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:11,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440444902] [2023-09-01 08:06:11,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:11,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:11,898 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 08:06:11,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:11,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440444902] [2023-09-01 08:06:11,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440444902] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:11,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:06:11,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:06:11,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141782899] [2023-09-01 08:06:11,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:11,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:06:11,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:11,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:06:11,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:06:11,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 254 [2023-09-01 08:06:11,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:11,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:11,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 254 [2023-09-01 08:06:11,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:13,295 INFO L130 PetriNetUnfolder]: 21203/25485 cut-off events. [2023-09-01 08:06:13,296 INFO L131 PetriNetUnfolder]: For 783/967 co-relation queries the response was YES. [2023-09-01 08:06:13,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53637 conditions, 25485 events. 21203/25485 cut-off events. For 783/967 co-relation queries the response was YES. Maximal size of possible extension queue 1909. Compared 110441 event pairs, 3443 based on Foata normal form. 184/8413 useless extension candidates. Maximal degree in co-relation 53630. Up to 22635 conditions per place. [2023-09-01 08:06:13,416 INFO L137 encePairwiseOnDemand]: 247/254 looper letters, 61 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-09-01 08:06:13,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 288 flow [2023-09-01 08:06:13,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:06:13,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:06:13,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2023-09-01 08:06:13,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616797900262467 [2023-09-01 08:06:13,419 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2023-09-01 08:06:13,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2023-09-01 08:06:13,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:13,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2023-09-01 08:06:13,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:13,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:13,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:13,423 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 103 flow. Second operand 3 states and 428 transitions. [2023-09-01 08:06:13,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 288 flow [2023-09-01 08:06:13,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 286 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:06:13,425 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 117 flow [2023-09-01 08:06:13,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2023-09-01 08:06:13,427 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2023-09-01 08:06:13,429 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 117 flow [2023-09-01 08:06:13,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:13,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:13,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 08:06:13,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 08:06:13,431 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-09-01 08:06:13,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:13,432 INFO L85 PathProgramCache]: Analyzing trace with hash 583296324, now seen corresponding path program 1 times [2023-09-01 08:06:13,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:13,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096432964] [2023-09-01 08:06:13,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:13,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:13,484 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 08:06:13,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:13,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096432964] [2023-09-01 08:06:13,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096432964] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:13,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086026308] [2023-09-01 08:06:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:13,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:13,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:13,497 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 08:06:13,516 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 08:06:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:13,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:06:13,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:13,637 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 08:06:13,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:06:13,668 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 08:06:13,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086026308] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:06:13,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:06:13,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 08:06:13,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034535046] [2023-09-01 08:06:13,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:06:13,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:06:13,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:13,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:06:13,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 08:06:13,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-09-01 08:06:13,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 117 flow. Second operand has 7 states, 7 states have (on average 120.42857142857143) internal successors, (843), 7 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:13,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:13,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-09-01 08:06:13,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:17,457 INFO L130 PetriNetUnfolder]: 60651/72351 cut-off events. [2023-09-01 08:06:17,457 INFO L131 PetriNetUnfolder]: For 4457/4457 co-relation queries the response was YES. [2023-09-01 08:06:17,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168253 conditions, 72351 events. 60651/72351 cut-off events. For 4457/4457 co-relation queries the response was YES. Maximal size of possible extension queue 3937. Compared 342309 event pairs, 3897 based on Foata normal form. 0/29284 useless extension candidates. Maximal degree in co-relation 168244. Up to 19309 conditions per place. [2023-09-01 08:06:17,938 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 177 selfloop transitions, 9 changer transitions 0/189 dead transitions. [2023-09-01 08:06:17,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 189 transitions, 867 flow [2023-09-01 08:06:17,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 08:06:17,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 08:06:17,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1022 transitions. [2023-09-01 08:06:17,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748031496062992 [2023-09-01 08:06:17,944 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1022 transitions. [2023-09-01 08:06:17,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1022 transitions. [2023-09-01 08:06:17,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:17,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1022 transitions. [2023-09-01 08:06:17,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 146.0) internal successors, (1022), 7 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:17,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:17,951 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:17,951 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 117 flow. Second operand 7 states and 1022 transitions. [2023-09-01 08:06:17,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 189 transitions, 867 flow [2023-09-01 08:06:17,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 189 transitions, 863 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 08:06:17,955 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 172 flow [2023-09-01 08:06:17,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=172, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2023-09-01 08:06:17,956 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2023-09-01 08:06:17,956 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 172 flow [2023-09-01 08:06:17,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.42857142857143) internal successors, (843), 7 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:17,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:17,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 08:06:17,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 08:06:18,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:18,163 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-09-01 08:06:18,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:18,164 INFO L85 PathProgramCache]: Analyzing trace with hash 583296256, now seen corresponding path program 1 times [2023-09-01 08:06:18,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:18,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210512239] [2023-09-01 08:06:18,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:18,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:18,214 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 08:06:18,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:18,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210512239] [2023-09-01 08:06:18,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210512239] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:18,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694401702] [2023-09-01 08:06:18,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:18,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:18,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:18,217 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 08:06:18,225 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 08:06:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:18,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:06:18,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:18,297 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 08:06:18,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:06:18,315 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 08:06:18,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694401702] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:06:18,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:06:18,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-09-01 08:06:18,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578929073] [2023-09-01 08:06:18,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:06:18,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:06:18,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:18,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:06:18,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 08:06:18,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 254 [2023-09-01 08:06:18,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 121.57142857142857) internal successors, (851), 7 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:18,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:18,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 254 [2023-09-01 08:06:18,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:25,351 INFO L130 PetriNetUnfolder]: 110345/134059 cut-off events. [2023-09-01 08:06:25,351 INFO L131 PetriNetUnfolder]: For 34245/34613 co-relation queries the response was YES. [2023-09-01 08:06:25,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327290 conditions, 134059 events. 110345/134059 cut-off events. For 34245/34613 co-relation queries the response was YES. Maximal size of possible extension queue 6518. Compared 721030 event pairs, 14499 based on Foata normal form. 6862/65083 useless extension candidates. Maximal degree in co-relation 327279. Up to 32506 conditions per place. [2023-09-01 08:06:26,056 INFO L137 encePairwiseOnDemand]: 245/254 looper letters, 142 selfloop transitions, 38 changer transitions 0/184 dead transitions. [2023-09-01 08:06:26,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 184 transitions, 979 flow [2023-09-01 08:06:26,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 08:06:26,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 08:06:26,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 892 transitions. [2023-09-01 08:06:26,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853018372703412 [2023-09-01 08:06:26,063 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 892 transitions. [2023-09-01 08:06:26,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 892 transitions. [2023-09-01 08:06:26,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:26,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 892 transitions. [2023-09-01 08:06:26,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 148.66666666666666) internal successors, (892), 6 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:26,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:26,069 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 254.0) internal successors, (1778), 7 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:26,069 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 172 flow. Second operand 6 states and 892 transitions. [2023-09-01 08:06:26,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 184 transitions, 979 flow [2023-09-01 08:06:26,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 184 transitions, 941 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-09-01 08:06:26,226 INFO L231 Difference]: Finished difference. Result has 63 places, 77 transitions, 519 flow [2023-09-01 08:06:26,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=519, PETRI_PLACES=63, PETRI_TRANSITIONS=77} [2023-09-01 08:06:26,227 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 11 predicate places. [2023-09-01 08:06:26,227 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 77 transitions, 519 flow [2023-09-01 08:06:26,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 121.57142857142857) internal successors, (851), 7 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:26,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:26,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 08:06:26,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 08:06:26,433 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 08:06:26,434 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-09-01 08:06:26,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:26,434 INFO L85 PathProgramCache]: Analyzing trace with hash 583296302, now seen corresponding path program 1 times [2023-09-01 08:06:26,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:26,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898347290] [2023-09-01 08:06:26,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:26,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:26,466 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 08:06:26,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:26,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898347290] [2023-09-01 08:06:26,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898347290] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:26,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:06:26,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:06:26,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135937129] [2023-09-01 08:06:26,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:26,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:06:26,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:26,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:06:26,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:06:26,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-09-01 08:06:26,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 77 transitions, 519 flow. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:26,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:26,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-09-01 08:06:26,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:33,352 INFO L130 PetriNetUnfolder]: 96553/118061 cut-off events. [2023-09-01 08:06:33,352 INFO L131 PetriNetUnfolder]: For 116056/116056 co-relation queries the response was YES. [2023-09-01 08:06:33,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328810 conditions, 118061 events. 96553/118061 cut-off events. For 116056/116056 co-relation queries the response was YES. Maximal size of possible extension queue 5783. Compared 616725 event pairs, 43447 based on Foata normal form. 1904/55813 useless extension candidates. Maximal degree in co-relation 328793. Up to 117338 conditions per place. [2023-09-01 08:06:34,069 INFO L137 encePairwiseOnDemand]: 252/254 looper letters, 78 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-09-01 08:06:34,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 82 transitions, 592 flow [2023-09-01 08:06:34,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:06:34,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:06:34,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 413 transitions. [2023-09-01 08:06:34,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541994750656168 [2023-09-01 08:06:34,072 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 413 transitions. [2023-09-01 08:06:34,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 413 transitions. [2023-09-01 08:06:34,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:34,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 413 transitions. [2023-09-01 08:06:34,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:34,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:34,074 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:34,074 INFO L175 Difference]: Start difference. First operand has 63 places, 77 transitions, 519 flow. Second operand 3 states and 413 transitions. [2023-09-01 08:06:34,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 82 transitions, 592 flow [2023-09-01 08:06:35,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 82 transitions, 550 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-09-01 08:06:35,316 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 352 flow [2023-09-01 08:06:35,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=352, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2023-09-01 08:06:35,317 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 11 predicate places. [2023-09-01 08:06:35,317 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 352 flow [2023-09-01 08:06:35,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:35,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:35,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:06:35,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 08:06:35,318 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-09-01 08:06:35,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:35,319 INFO L85 PathProgramCache]: Analyzing trace with hash -95000540, now seen corresponding path program 1 times [2023-09-01 08:06:35,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:35,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972648299] [2023-09-01 08:06:35,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:35,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:35,355 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 08:06:35,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:35,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972648299] [2023-09-01 08:06:35,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972648299] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:35,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:06:35,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:06:35,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281622756] [2023-09-01 08:06:35,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:35,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:06:35,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:35,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:06:35,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:06:35,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-09-01 08:06:35,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 352 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:35,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:35,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-09-01 08:06:35,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:42,319 INFO L130 PetriNetUnfolder]: 101469/125083 cut-off events. [2023-09-01 08:06:42,320 INFO L131 PetriNetUnfolder]: For 77616/78200 co-relation queries the response was YES. [2023-09-01 08:06:42,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322522 conditions, 125083 events. 101469/125083 cut-off events. For 77616/78200 co-relation queries the response was YES. Maximal size of possible extension queue 6527. Compared 707672 event pairs, 46543 based on Foata normal form. 584/58472 useless extension candidates. Maximal degree in co-relation 322504. Up to 102189 conditions per place. [2023-09-01 08:06:43,069 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 91 selfloop transitions, 4 changer transitions 0/98 dead transitions. [2023-09-01 08:06:43,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 98 transitions, 689 flow [2023-09-01 08:06:43,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:06:43,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:06:43,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 424 transitions. [2023-09-01 08:06:43,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564304461942258 [2023-09-01 08:06:43,071 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 424 transitions. [2023-09-01 08:06:43,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 424 transitions. [2023-09-01 08:06:43,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:43,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 424 transitions. [2023-09-01 08:06:43,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:43,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:43,074 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:43,074 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 352 flow. Second operand 3 states and 424 transitions. [2023-09-01 08:06:43,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 98 transitions, 689 flow [2023-09-01 08:06:44,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 98 transitions, 669 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-09-01 08:06:44,121 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 389 flow [2023-09-01 08:06:44,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=389, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2023-09-01 08:06:44,122 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 12 predicate places. [2023-09-01 08:06:44,122 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 389 flow [2023-09-01 08:06:44,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:44,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:44,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:06:44,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 08:06:44,122 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-09-01 08:06:44,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:44,123 INFO L85 PathProgramCache]: Analyzing trace with hash -90592928, now seen corresponding path program 1 times [2023-09-01 08:06:44,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:44,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260411373] [2023-09-01 08:06:44,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:44,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:44,193 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 08:06:44,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:44,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260411373] [2023-09-01 08:06:44,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260411373] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:44,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:06:44,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 08:06:44,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368272705] [2023-09-01 08:06:44,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:44,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:06:44,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:44,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:06:44,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:06:44,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 254 [2023-09-01 08:06:44,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 389 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:44,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:44,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 254 [2023-09-01 08:06:44,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:49,698 INFO L130 PetriNetUnfolder]: 77955/99496 cut-off events. [2023-09-01 08:06:49,698 INFO L131 PetriNetUnfolder]: For 116618/118308 co-relation queries the response was YES. [2023-09-01 08:06:49,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273214 conditions, 99496 events. 77955/99496 cut-off events. For 116618/118308 co-relation queries the response was YES. Maximal size of possible extension queue 5711. Compared 573672 event pairs, 10703 based on Foata normal form. 1690/52994 useless extension candidates. Maximal degree in co-relation 273196. Up to 90589 conditions per place. [2023-09-01 08:06:50,270 INFO L137 encePairwiseOnDemand]: 244/254 looper letters, 106 selfloop transitions, 4 changer transitions 2/116 dead transitions. [2023-09-01 08:06:50,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 116 transitions, 956 flow [2023-09-01 08:06:50,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:06:50,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:06:50,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 424 transitions. [2023-09-01 08:06:50,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564304461942258 [2023-09-01 08:06:50,271 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 424 transitions. [2023-09-01 08:06:50,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 424 transitions. [2023-09-01 08:06:50,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:50,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 424 transitions. [2023-09-01 08:06:50,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:50,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:50,274 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:50,274 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 389 flow. Second operand 3 states and 424 transitions. [2023-09-01 08:06:50,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 116 transitions, 956 flow [2023-09-01 08:06:50,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 116 transitions, 949 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:06:50,343 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 421 flow [2023-09-01 08:06:50,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=421, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2023-09-01 08:06:50,343 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 14 predicate places. [2023-09-01 08:06:50,343 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 421 flow [2023-09-01 08:06:50,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:50,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:50,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:06:50,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 08:06:50,344 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-09-01 08:06:50,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:50,345 INFO L85 PathProgramCache]: Analyzing trace with hash -90592878, now seen corresponding path program 1 times [2023-09-01 08:06:50,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:50,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972971898] [2023-09-01 08:06:50,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:50,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:50,372 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 08:06:50,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:50,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972971898] [2023-09-01 08:06:50,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972971898] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:06:50,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:06:50,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:06:50,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746821355] [2023-09-01 08:06:50,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:06:50,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:06:50,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:50,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:06:50,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:06:50,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-09-01 08:06:50,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 421 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:50,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:50,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-09-01 08:06:50,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:06:56,281 INFO L130 PetriNetUnfolder]: 78301/101014 cut-off events. [2023-09-01 08:06:56,282 INFO L131 PetriNetUnfolder]: For 102488/105314 co-relation queries the response was YES. [2023-09-01 08:06:56,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319098 conditions, 101014 events. 78301/101014 cut-off events. For 102488/105314 co-relation queries the response was YES. Maximal size of possible extension queue 5767. Compared 630652 event pairs, 48549 based on Foata normal form. 1778/66396 useless extension candidates. Maximal degree in co-relation 319078. Up to 91819 conditions per place. [2023-09-01 08:06:56,947 INFO L137 encePairwiseOnDemand]: 250/254 looper letters, 107 selfloop transitions, 2 changer transitions 2/114 dead transitions. [2023-09-01 08:06:56,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 114 transitions, 967 flow [2023-09-01 08:06:56,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:06:56,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:06:56,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2023-09-01 08:06:56,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5459317585301837 [2023-09-01 08:06:56,950 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2023-09-01 08:06:56,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2023-09-01 08:06:56,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:06:56,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2023-09-01 08:06:56,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:56,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:56,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:56,953 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 421 flow. Second operand 3 states and 416 transitions. [2023-09-01 08:06:56,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 114 transitions, 967 flow [2023-09-01 08:06:57,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 114 transitions, 965 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:06:57,297 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 413 flow [2023-09-01 08:06:57,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=413, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2023-09-01 08:06:57,297 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 15 predicate places. [2023-09-01 08:06:57,298 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 413 flow [2023-09-01 08:06:57,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:57,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:06:57,298 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-09-01 08:06:57,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 08:06:57,298 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-09-01 08:06:57,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:06:57,299 INFO L85 PathProgramCache]: Analyzing trace with hash -456292621, now seen corresponding path program 2 times [2023-09-01 08:06:57,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:06:57,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604093495] [2023-09-01 08:06:57,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:06:57,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:06:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:06:57,380 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 08:06:57,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:06:57,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604093495] [2023-09-01 08:06:57,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604093495] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:06:57,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534473103] [2023-09-01 08:06:57,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:06:57,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:06:57,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:06:57,383 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 08:06:57,385 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 08:06:57,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 08:06:57,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:06:57,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 08:06:57,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:06:57,480 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 08:06:57,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:06:57,534 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 08:06:57,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534473103] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:06:57,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:06:57,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-09-01 08:06:57,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164440102] [2023-09-01 08:06:57,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:06:57,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 08:06:57,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:06:57,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 08:06:57,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 08:06:57,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 254 [2023-09-01 08:06:57,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 413 flow. Second operand has 13 states, 13 states have (on average 121.3076923076923) internal successors, (1577), 13 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:06:57,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:06:57,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 254 [2023-09-01 08:06:57,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:07:13,023 INFO L130 PetriNetUnfolder]: 183717/235635 cut-off events. [2023-09-01 08:07:13,023 INFO L131 PetriNetUnfolder]: For 282517/287411 co-relation queries the response was YES. [2023-09-01 08:07:13,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734241 conditions, 235635 events. 183717/235635 cut-off events. For 282517/287411 co-relation queries the response was YES. Maximal size of possible extension queue 12404. Compared 1572154 event pairs, 24711 based on Foata normal form. 16094/159661 useless extension candidates. Maximal degree in co-relation 734221. Up to 93229 conditions per place. [2023-09-01 08:07:14,711 INFO L137 encePairwiseOnDemand]: 246/254 looper letters, 310 selfloop transitions, 97 changer transitions 0/411 dead transitions. [2023-09-01 08:07:14,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 411 transitions, 2643 flow [2023-09-01 08:07:14,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 08:07:14,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 08:07:14,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1805 transitions. [2023-09-01 08:07:14,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5921916010498688 [2023-09-01 08:07:14,716 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1805 transitions. [2023-09-01 08:07:14,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1805 transitions. [2023-09-01 08:07:14,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:07:14,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1805 transitions. [2023-09-01 08:07:14,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 150.41666666666666) internal successors, (1805), 12 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:07:14,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 254.0) internal successors, (3302), 13 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:07:14,726 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 254.0) internal successors, (3302), 13 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:07:14,726 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 413 flow. Second operand 12 states and 1805 transitions. [2023-09-01 08:07:14,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 411 transitions, 2643 flow [2023-09-01 08:07:15,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 411 transitions, 2619 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 08:07:15,502 INFO L231 Difference]: Finished difference. Result has 86 places, 141 transitions, 1440 flow [2023-09-01 08:07:15,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1440, PETRI_PLACES=86, PETRI_TRANSITIONS=141} [2023-09-01 08:07:15,503 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2023-09-01 08:07:15,503 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 141 transitions, 1440 flow [2023-09-01 08:07:15,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 121.3076923076923) internal successors, (1577), 13 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:07:15,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:07:15,504 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-09-01 08:07:15,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 08:07:15,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:07:15,709 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-09-01 08:07:15,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:07:15,710 INFO L85 PathProgramCache]: Analyzing trace with hash -456292553, now seen corresponding path program 2 times [2023-09-01 08:07:15,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:07:15,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152222204] [2023-09-01 08:07:15,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:07:15,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:07:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:07:15,775 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 08:07:15,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:07:15,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152222204] [2023-09-01 08:07:15,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152222204] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:07:15,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500942834] [2023-09-01 08:07:15,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 08:07:15,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:07:15,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:07:15,776 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 08:07:15,779 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 08:07:15,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 08:07:15,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 08:07:15,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:07:15,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:07:15,853 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 08:07:15,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:07:15,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500942834] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:07:15,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:07:15,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-09-01 08:07:15,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163973354] [2023-09-01 08:07:15,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:07:15,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:07:15,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:07:15,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:07:15,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 08:07:15,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-09-01 08:07:15,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 141 transitions, 1440 flow. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:07:15,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:07:15,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-09-01 08:07:15,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:07:28,487 INFO L130 PetriNetUnfolder]: 128123/165014 cut-off events. [2023-09-01 08:07:28,488 INFO L131 PetriNetUnfolder]: For 322283/325469 co-relation queries the response was YES. [2023-09-01 08:07:29,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573749 conditions, 165014 events. 128123/165014 cut-off events. For 322283/325469 co-relation queries the response was YES. Maximal size of possible extension queue 8679. Compared 1085567 event pairs, 84713 based on Foata normal form. 5442/112572 useless extension candidates. Maximal degree in co-relation 573719. Up to 164882 conditions per place. [2023-09-01 08:07:30,240 INFO L137 encePairwiseOnDemand]: 251/254 looper letters, 116 selfloop transitions, 1 changer transitions 0/121 dead transitions. [2023-09-01 08:07:30,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 121 transitions, 1476 flow [2023-09-01 08:07:30,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 08:07:30,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 08:07:30,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-09-01 08:07:30,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144356955380578 [2023-09-01 08:07:30,242 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-09-01 08:07:30,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-09-01 08:07:30,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:07:30,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-09-01 08:07:30,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:07:30,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:07:30,245 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:07:30,245 INFO L175 Difference]: Start difference. First operand has 86 places, 141 transitions, 1440 flow. Second operand 3 states and 392 transitions. [2023-09-01 08:07:30,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 121 transitions, 1476 flow [2023-09-01 08:07:34,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 121 transitions, 1257 flow, removed 97 selfloop flow, removed 4 redundant places. [2023-09-01 08:07:34,526 INFO L231 Difference]: Finished difference. Result has 82 places, 121 transitions, 1025 flow [2023-09-01 08:07:34,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1025, PETRI_PLACES=82, PETRI_TRANSITIONS=121} [2023-09-01 08:07:34,527 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 30 predicate places. [2023-09-01 08:07:34,527 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 121 transitions, 1025 flow [2023-09-01 08:07:34,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:07:34,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:07:34,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:07:34,532 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 08:07:34,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:07:34,729 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-09-01 08:07:34,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:07:34,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1486588999, now seen corresponding path program 1 times [2023-09-01 08:07:34,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:07:34,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012884579] [2023-09-01 08:07:34,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:07:34,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:07:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:07:34,787 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 08:07:34,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:07:34,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012884579] [2023-09-01 08:07:34,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012884579] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:07:34,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080165736] [2023-09-01 08:07:34,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:07:34,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:07:34,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:07:34,792 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 08:07:34,794 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 08:07:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:07:34,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 08:07:34,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:07:34,881 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 08:07:34,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 08:07:34,906 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 08:07:34,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080165736] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 08:07:34,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 08:07:34,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-09-01 08:07:34,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213578490] [2023-09-01 08:07:34,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 08:07:34,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 08:07:34,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:07:34,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 08:07:34,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 08:07:34,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 254 [2023-09-01 08:07:34,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 121 transitions, 1025 flow. Second operand has 7 states, 7 states have (on average 123.28571428571429) internal successors, (863), 7 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:07:34,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:07:34,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 254 [2023-09-01 08:07:34,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:08:09,423 INFO L130 PetriNetUnfolder]: 329587/424586 cut-off events. [2023-09-01 08:08:09,424 INFO L131 PetriNetUnfolder]: For 853622/860296 co-relation queries the response was YES. [2023-09-01 08:08:11,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1378505 conditions, 424586 events. 329587/424586 cut-off events. For 853622/860296 co-relation queries the response was YES. Maximal size of possible extension queue 17220. Compared 2931151 event pairs, 34897 based on Foata normal form. 11398/299000 useless extension candidates. Maximal degree in co-relation 1378477. Up to 160473 conditions per place. [2023-09-01 08:08:13,374 INFO L137 encePairwiseOnDemand]: 245/254 looper letters, 624 selfloop transitions, 20 changer transitions 0/648 dead transitions. [2023-09-01 08:08:13,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 648 transitions, 7136 flow [2023-09-01 08:08:13,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 08:08:13,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 08:08:13,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1001 transitions. [2023-09-01 08:08:13,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.562992125984252 [2023-09-01 08:08:13,377 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1001 transitions. [2023-09-01 08:08:13,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1001 transitions. [2023-09-01 08:08:13,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:08:13,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1001 transitions. [2023-09-01 08:08:13,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 143.0) internal successors, (1001), 7 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:08:13,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:08:13,383 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:08:13,383 INFO L175 Difference]: Start difference. First operand has 82 places, 121 transitions, 1025 flow. Second operand 7 states and 1001 transitions. [2023-09-01 08:08:13,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 648 transitions, 7136 flow [2023-09-01 08:08:16,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 648 transitions, 7135 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 08:08:16,990 INFO L231 Difference]: Finished difference. Result has 92 places, 138 transitions, 1214 flow [2023-09-01 08:08:16,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1214, PETRI_PLACES=92, PETRI_TRANSITIONS=138} [2023-09-01 08:08:16,990 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 40 predicate places. [2023-09-01 08:08:16,991 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 138 transitions, 1214 flow [2023-09-01 08:08:16,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 123.28571428571429) internal successors, (863), 7 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:08:16,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:08:16,991 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:08:17,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 08:08:17,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 08:08:17,192 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-09-01 08:08:17,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:08:17,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1160378848, now seen corresponding path program 1 times [2023-09-01 08:08:17,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:08:17,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117280082] [2023-09-01 08:08:17,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:08:17,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:08:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:08:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:08:17,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:08:17,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117280082] [2023-09-01 08:08:17,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117280082] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 08:08:17,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085632824] [2023-09-01 08:08:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:08:17,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:08:17,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 08:08:17,249 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 08:08:17,253 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 08:08:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:08:17,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 08:08:17,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 08:08:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 08:08:17,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 08:08:17,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085632824] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:08:17,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 08:08:17,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-09-01 08:08:17,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043647528] [2023-09-01 08:08:17,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:08:17,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 08:08:17,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:08:17,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 08:08:17,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 08:08:17,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 254 [2023-09-01 08:08:17,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 138 transitions, 1214 flow. Second operand has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:08:17,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:08:17,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 254 [2023-09-01 08:08:17,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 08:09:19,116 INFO L130 PetriNetUnfolder]: 504731/658378 cut-off events. [2023-09-01 08:09:19,116 INFO L131 PetriNetUnfolder]: For 1947442/1958162 co-relation queries the response was YES. [2023-09-01 08:09:24,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2823311 conditions, 658378 events. 504731/658378 cut-off events. For 1947442/1958162 co-relation queries the response was YES. Maximal size of possible extension queue 24181. Compared 4830000 event pairs, 81101 based on Foata normal form. 51040/539798 useless extension candidates. Maximal degree in co-relation 2823277. Up to 254100 conditions per place. [2023-09-01 08:09:28,878 INFO L137 encePairwiseOnDemand]: 245/254 looper letters, 322 selfloop transitions, 35 changer transitions 0/361 dead transitions. [2023-09-01 08:09:28,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 361 transitions, 4015 flow [2023-09-01 08:09:28,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 08:09:28,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 08:09:28,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 687 transitions. [2023-09-01 08:09:28,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409448818897638 [2023-09-01 08:09:28,896 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 687 transitions. [2023-09-01 08:09:28,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 687 transitions. [2023-09-01 08:09:28,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 08:09:28,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 687 transitions. [2023-09-01 08:09:28,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.4) internal successors, (687), 5 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:28,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:28,913 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 254.0) internal successors, (1524), 6 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:09:28,913 INFO L175 Difference]: Start difference. First operand has 92 places, 138 transitions, 1214 flow. Second operand 5 states and 687 transitions. [2023-09-01 08:09:28,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 361 transitions, 4015 flow [2023-09-01 08:12:22,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 361 transitions, 3961 flow, removed 27 selfloop flow, removed 1 redundant places. [2023-09-01 08:12:22,592 INFO L231 Difference]: Finished difference. Result has 94 places, 157 transitions, 1471 flow [2023-09-01 08:12:22,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1471, PETRI_PLACES=94, PETRI_TRANSITIONS=157} [2023-09-01 08:12:22,593 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 42 predicate places. [2023-09-01 08:12:22,593 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 157 transitions, 1471 flow [2023-09-01 08:12:22,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:22,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 08:12:22,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 08:12:22,598 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 08:12:22,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 08:12:22,796 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-09-01 08:12:22,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 08:12:22,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1486589035, now seen corresponding path program 1 times [2023-09-01 08:12:22,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 08:12:22,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436266797] [2023-09-01 08:12:22,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 08:12:22,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 08:12:22,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 08:12:22,828 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 08:12:22,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 08:12:22,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436266797] [2023-09-01 08:12:22,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436266797] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 08:12:22,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 08:12:22,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 08:12:22,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685561464] [2023-09-01 08:12:22,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 08:12:22,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 08:12:22,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 08:12:22,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 08:12:22,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 08:12:22,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 254 [2023-09-01 08:12:22,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 157 transitions, 1471 flow. Second operand has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 08:12:22,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 08:12:22,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 254 [2023-09-01 08:12:22,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand