./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/mult-flipped-dist.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d10bf8c0e842192a13f4b6638f03cf57668d5bee07d0b49c4b595de1c605066 --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 12:29:36,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 12:29:36,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 12:29:36,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 12:29:36,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 12:29:36,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 12:29:36,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 12:29:36,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 12:29:36,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 12:29:36,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 12:29:36,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 12:29:36,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 12:29:36,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 12:29:36,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 12:29:36,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 12:29:36,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 12:29:36,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 12:29:36,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 12:29:36,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 12:29:36,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 12:29:36,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 12:29:36,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 12:29:36,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 12:29:36,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 12:29:36,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 12:29:36,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 12:29:36,580 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 12:29:36,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 12:29:36,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 12:29:36,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 12:29:36,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 12:29:36,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 12:29:36,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 12:29:36,592 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 12:29:36,593 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 12:29:36,593 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 12:29:36,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 12:29:36,594 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 12:29:36,594 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 12:29:36,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 12:29:36,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 12:29:36,596 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 12:29:36,615 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 12:29:36,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 12:29:36,616 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 12:29:36,617 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 12:29:36,617 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 12:29:36,617 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 12:29:36,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 12:29:36,618 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 12:29:36,618 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 12:29:36,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 12:29:36,619 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 12:29:36,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 12:29:36,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 12:29:36,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 12:29:36,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 12:29:36,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 12:29:36,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 12:29:36,620 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 12:29:36,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 12:29:36,620 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 12:29:36,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 12:29:36,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 12:29:36,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 12:29:36,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 12:29:36,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:29:36,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 12:29:36,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 12:29:36,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 12:29:36,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 12:29:36,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 12:29:36,622 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 12:29:36,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 12:29:36,622 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 12:29:36,622 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 12:29:36,622 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 12:29:36,622 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d10bf8c0e842192a13f4b6638f03cf57668d5bee07d0b49c4b595de1c605066 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 12:29:36,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 12:29:36,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 12:29:36,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 12:29:36,903 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 12:29:36,903 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 12:29:36,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c [2023-09-01 12:29:37,829 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 12:29:38,002 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 12:29:38,003 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c [2023-09-01 12:29:38,026 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8df8c7bf7/8840f71605be45c5b83cda0dea62be1c/FLAGd42acc378 [2023-09-01 12:29:38,038 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8df8c7bf7/8840f71605be45c5b83cda0dea62be1c [2023-09-01 12:29:38,040 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 12:29:38,041 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 12:29:38,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 12:29:38,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 12:29:38,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 12:29:38,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:29:38" (1/1) ... [2023-09-01 12:29:38,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47ac850c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:29:38, skipping insertion in model container [2023-09-01 12:29:38,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:29:38" (1/1) ... [2023-09-01 12:29:38,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 12:29:38,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 12:29:38,172 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/mult-flipped-dist.wvr.c[2135,2148] [2023-09-01 12:29:38,183 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:29:38,195 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 12:29:38,225 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/mult-flipped-dist.wvr.c[2135,2148] [2023-09-01 12:29:38,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:29:38,241 INFO L208 MainTranslator]: Completed translation [2023-09-01 12:29:38,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:29:38 WrapperNode [2023-09-01 12:29:38,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 12:29:38,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 12:29:38,244 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 12:29:38,244 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 12:29:38,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:29:38" (1/1) ... [2023-09-01 12:29:38,259 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:29:38" (1/1) ... [2023-09-01 12:29:38,277 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 73 [2023-09-01 12:29:38,278 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 12:29:38,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 12:29:38,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 12:29:38,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 12:29:38,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:29:38" (1/1) ... [2023-09-01 12:29:38,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:29:38" (1/1) ... [2023-09-01 12:29:38,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:29:38" (1/1) ... [2023-09-01 12:29:38,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:29:38" (1/1) ... [2023-09-01 12:29:38,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:29:38" (1/1) ... [2023-09-01 12:29:38,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:29:38" (1/1) ... [2023-09-01 12:29:38,307 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:29:38" (1/1) ... [2023-09-01 12:29:38,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:29:38" (1/1) ... [2023-09-01 12:29:38,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 12:29:38,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 12:29:38,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 12:29:38,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 12:29:38,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:29:38" (1/1) ... [2023-09-01 12:29:38,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:29:38,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:38,370 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 12:29:38,400 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 12:29:38,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 12:29:38,419 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 12:29:38,419 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 12:29:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 12:29:38,420 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 12:29:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 12:29:38,420 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 12:29:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 12:29:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 12:29:38,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 12:29:38,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 12:29:38,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 12:29:38,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 12:29:38,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 12:29:38,422 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 12:29:38,517 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 12:29:38,518 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 12:29:38,694 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 12:29:38,699 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 12:29:38,699 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 12:29:38,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:29:38 BoogieIcfgContainer [2023-09-01 12:29:38,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 12:29:38,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 12:29:38,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 12:29:38,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 12:29:38,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:29:38" (1/3) ... [2023-09-01 12:29:38,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66232f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:29:38, skipping insertion in model container [2023-09-01 12:29:38,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:29:38" (2/3) ... [2023-09-01 12:29:38,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66232f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:29:38, skipping insertion in model container [2023-09-01 12:29:38,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:29:38" (3/3) ... [2023-09-01 12:29:38,706 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.c [2023-09-01 12:29:38,711 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 12:29:38,717 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 12:29:38,717 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 12:29:38,718 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 12:29:38,761 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 12:29:38,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 105 transitions, 234 flow [2023-09-01 12:29:38,855 INFO L130 PetriNetUnfolder]: 7/102 cut-off events. [2023-09-01 12:29:38,855 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:29:38,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 102 events. 7/102 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 69 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2023-09-01 12:29:38,860 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 105 transitions, 234 flow [2023-09-01 12:29:38,863 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 92 transitions, 202 flow [2023-09-01 12:29:38,866 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 12:29:38,879 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 92 transitions, 202 flow [2023-09-01 12:29:38,884 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 92 transitions, 202 flow [2023-09-01 12:29:38,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 92 transitions, 202 flow [2023-09-01 12:29:38,917 INFO L130 PetriNetUnfolder]: 7/92 cut-off events. [2023-09-01 12:29:38,917 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:29:38,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 92 events. 7/92 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2023-09-01 12:29:38,920 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-09-01 12:29:40,968 INFO L134 LiptonReduction]: Checked pairs total: 1312 [2023-09-01 12:29:40,969 INFO L136 LiptonReduction]: Total number of compositions: 76 [2023-09-01 12:29:40,978 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 12:29:40,982 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;@18fd6b40, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 12:29:40,982 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 12:29:40,986 INFO L130 PetriNetUnfolder]: 3/21 cut-off events. [2023-09-01 12:29:40,986 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:29:40,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:40,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:40,987 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:29:40,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:40,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1620298547, now seen corresponding path program 1 times [2023-09-01 12:29:40,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:40,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714977829] [2023-09-01 12:29:40,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:40,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:41,416 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 12:29:41,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:41,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714977829] [2023-09-01 12:29:41,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714977829] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:29:41,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:29:41,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 12:29:41,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979717953] [2023-09-01 12:29:41,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:29:41,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:29:41,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:41,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:29:41,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:29:41,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 181 [2023-09-01 12:29:41,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:41,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:41,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 181 [2023-09-01 12:29:41,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:41,569 INFO L130 PetriNetUnfolder]: 359/506 cut-off events. [2023-09-01 12:29:41,569 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2023-09-01 12:29:41,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 506 events. 359/506 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1602 event pairs, 39 based on Foata normal form. 1/311 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2023-09-01 12:29:41,573 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 30 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2023-09-01 12:29:41,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 38 transitions, 179 flow [2023-09-01 12:29:41,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:29:41,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:29:41,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 309 transitions. [2023-09-01 12:29:41,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569060773480663 [2023-09-01 12:29:41,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 309 transitions. [2023-09-01 12:29:41,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 309 transitions. [2023-09-01 12:29:41,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:41,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 309 transitions. [2023-09-01 12:29:41,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:41,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:41,593 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:41,594 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 62 flow. Second operand 3 states and 309 transitions. [2023-09-01 12:29:41,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 38 transitions, 179 flow [2023-09-01 12:29:41,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 38 transitions, 157 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 12:29:41,598 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 76 flow [2023-09-01 12:29:41,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2023-09-01 12:29:41,601 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2023-09-01 12:29:41,601 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 76 flow [2023-09-01 12:29:41,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:41,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:41,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:41,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 12:29:41,602 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:29:41,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:41,603 INFO L85 PathProgramCache]: Analyzing trace with hash -622319524, now seen corresponding path program 1 times [2023-09-01 12:29:41,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:41,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516801634] [2023-09-01 12:29:41,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:41,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:41,696 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 12:29:41,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:41,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516801634] [2023-09-01 12:29:41,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516801634] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:29:41,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:29:41,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 12:29:41,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551913037] [2023-09-01 12:29:41,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:29:41,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:29:41,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:41,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:29:41,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:29:41,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-09-01 12:29:41,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 76 flow. Second operand has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:41,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:41,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-09-01 12:29:41,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:41,866 INFO L130 PetriNetUnfolder]: 486/764 cut-off events. [2023-09-01 12:29:41,867 INFO L131 PetriNetUnfolder]: For 190/190 co-relation queries the response was YES. [2023-09-01 12:29:41,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1805 conditions, 764 events. 486/764 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3182 event pairs, 137 based on Foata normal form. 68/826 useless extension candidates. Maximal degree in co-relation 420. Up to 391 conditions per place. [2023-09-01 12:29:41,870 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 54 selfloop transitions, 5 changer transitions 2/62 dead transitions. [2023-09-01 12:29:41,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 62 transitions, 298 flow [2023-09-01 12:29:41,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:29:41,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:29:41,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 480 transitions. [2023-09-01 12:29:41,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303867403314917 [2023-09-01 12:29:41,873 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 480 transitions. [2023-09-01 12:29:41,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 480 transitions. [2023-09-01 12:29:41,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:41,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 480 transitions. [2023-09-01 12:29:41,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.0) internal successors, (480), 5 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:41,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:41,877 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:41,877 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 76 flow. Second operand 5 states and 480 transitions. [2023-09-01 12:29:41,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 62 transitions, 298 flow [2023-09-01 12:29:41,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 62 transitions, 292 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:29:41,879 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 119 flow [2023-09-01 12:29:41,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-09-01 12:29:41,879 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-09-01 12:29:41,880 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 119 flow [2023-09-01 12:29:41,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:41,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:41,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:41,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 12:29:41,881 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:29:41,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:41,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1535831546, now seen corresponding path program 2 times [2023-09-01 12:29:41,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:41,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544290623] [2023-09-01 12:29:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:41,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:41,972 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 12:29:41,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:41,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544290623] [2023-09-01 12:29:41,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544290623] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:29:41,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:29:41,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:29:41,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866072141] [2023-09-01 12:29:41,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:29:41,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:29:41,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:41,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:29:41,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:29:41,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 181 [2023-09-01 12:29:41,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 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 12:29:41,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:41,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 181 [2023-09-01 12:29:41,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:42,090 INFO L130 PetriNetUnfolder]: 469/738 cut-off events. [2023-09-01 12:29:42,090 INFO L131 PetriNetUnfolder]: For 864/985 co-relation queries the response was YES. [2023-09-01 12:29:42,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2295 conditions, 738 events. 469/738 cut-off events. For 864/985 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3069 event pairs, 103 based on Foata normal form. 124/839 useless extension candidates. Maximal degree in co-relation 842. Up to 458 conditions per place. [2023-09-01 12:29:42,100 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 41 selfloop transitions, 5 changer transitions 5/54 dead transitions. [2023-09-01 12:29:42,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 54 transitions, 311 flow [2023-09-01 12:29:42,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:29:42,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:29:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 392 transitions. [2023-09-01 12:29:42,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414364640883977 [2023-09-01 12:29:42,102 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 392 transitions. [2023-09-01 12:29:42,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 392 transitions. [2023-09-01 12:29:42,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:42,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 392 transitions. [2023-09-01 12:29:42,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 98.0) internal successors, (392), 4 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 12:29:42,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:42,105 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:42,105 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 119 flow. Second operand 4 states and 392 transitions. [2023-09-01 12:29:42,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 54 transitions, 311 flow [2023-09-01 12:29:42,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 54 transitions, 301 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-09-01 12:29:42,109 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 145 flow [2023-09-01 12:29:42,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2023-09-01 12:29:42,110 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2023-09-01 12:29:42,112 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 145 flow [2023-09-01 12:29:42,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 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 12:29:42,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:42,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:42,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 12:29:42,113 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:29:42,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:42,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1297497348, now seen corresponding path program 1 times [2023-09-01 12:29:42,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:42,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519698040] [2023-09-01 12:29:42,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:42,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:42,227 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 12:29:42,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:42,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519698040] [2023-09-01 12:29:42,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519698040] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:29:42,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:29:42,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 12:29:42,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743894111] [2023-09-01 12:29:42,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:29:42,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:29:42,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:42,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:29:42,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:29:42,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-09-01 12:29:42,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:42,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:42,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-09-01 12:29:42,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:42,400 INFO L130 PetriNetUnfolder]: 623/1049 cut-off events. [2023-09-01 12:29:42,400 INFO L131 PetriNetUnfolder]: For 2754/2858 co-relation queries the response was YES. [2023-09-01 12:29:42,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3376 conditions, 1049 events. 623/1049 cut-off events. For 2754/2858 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5075 event pairs, 191 based on Foata normal form. 164/1201 useless extension candidates. Maximal degree in co-relation 1674. Up to 527 conditions per place. [2023-09-01 12:29:42,404 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 59 selfloop transitions, 6 changer transitions 6/73 dead transitions. [2023-09-01 12:29:42,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 73 transitions, 458 flow [2023-09-01 12:29:42,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:29:42,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:29:42,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 482 transitions. [2023-09-01 12:29:42,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532596685082873 [2023-09-01 12:29:42,406 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 482 transitions. [2023-09-01 12:29:42,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 482 transitions. [2023-09-01 12:29:42,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:42,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 482 transitions. [2023-09-01 12:29:42,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.4) internal successors, (482), 5 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:42,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:42,409 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:42,409 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 145 flow. Second operand 5 states and 482 transitions. [2023-09-01 12:29:42,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 73 transitions, 458 flow [2023-09-01 12:29:42,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 73 transitions, 449 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 12:29:42,412 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 200 flow [2023-09-01 12:29:42,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-09-01 12:29:42,413 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2023-09-01 12:29:42,413 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 200 flow [2023-09-01 12:29:42,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:42,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:42,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:42,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 12:29:42,414 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:29:42,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:42,414 INFO L85 PathProgramCache]: Analyzing trace with hash -612746414, now seen corresponding path program 2 times [2023-09-01 12:29:42,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:42,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706611402] [2023-09-01 12:29:42,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:42,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:42,460 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 12:29:42,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:42,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706611402] [2023-09-01 12:29:42,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706611402] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:29:42,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:29:42,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:29:42,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426689358] [2023-09-01 12:29:42,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:29:42,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:29:42,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:42,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:29:42,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:29:42,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 181 [2023-09-01 12:29:42,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 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 12:29:42,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:42,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 181 [2023-09-01 12:29:42,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:42,589 INFO L130 PetriNetUnfolder]: 839/1400 cut-off events. [2023-09-01 12:29:42,590 INFO L131 PetriNetUnfolder]: For 4717/5125 co-relation queries the response was YES. [2023-09-01 12:29:42,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5499 conditions, 1400 events. 839/1400 cut-off events. For 4717/5125 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 7425 event pairs, 349 based on Foata normal form. 284/1615 useless extension candidates. Maximal degree in co-relation 2061. Up to 835 conditions per place. [2023-09-01 12:29:42,595 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 48 selfloop transitions, 12 changer transitions 3/67 dead transitions. [2023-09-01 12:29:42,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 67 transitions, 527 flow [2023-09-01 12:29:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:29:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:29:42,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 389 transitions. [2023-09-01 12:29:42,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.537292817679558 [2023-09-01 12:29:42,597 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 389 transitions. [2023-09-01 12:29:42,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 389 transitions. [2023-09-01 12:29:42,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:42,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 389 transitions. [2023-09-01 12:29:42,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.25) internal successors, (389), 4 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:42,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:42,599 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:42,600 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 200 flow. Second operand 4 states and 389 transitions. [2023-09-01 12:29:42,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 67 transitions, 527 flow [2023-09-01 12:29:42,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 67 transitions, 510 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-09-01 12:29:42,617 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 330 flow [2023-09-01 12:29:42,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=330, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-09-01 12:29:42,618 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2023-09-01 12:29:42,618 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 330 flow [2023-09-01 12:29:42,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 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 12:29:42,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:42,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:42,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 12:29:42,619 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:29:42,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:42,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1085629665, now seen corresponding path program 1 times [2023-09-01 12:29:42,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:42,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262351240] [2023-09-01 12:29:42,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:42,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:42,671 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 12:29:42,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:42,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262351240] [2023-09-01 12:29:42,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262351240] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:29:42,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:29:42,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:29:42,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815725573] [2023-09-01 12:29:42,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:29:42,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:29:42,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:42,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:29:42,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:29:42,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 181 [2023-09-01 12:29:42,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 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 12:29:42,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:42,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 181 [2023-09-01 12:29:42,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:42,842 INFO L130 PetriNetUnfolder]: 880/1445 cut-off events. [2023-09-01 12:29:42,842 INFO L131 PetriNetUnfolder]: For 7838/8234 co-relation queries the response was YES. [2023-09-01 12:29:42,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6571 conditions, 1445 events. 880/1445 cut-off events. For 7838/8234 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 7323 event pairs, 317 based on Foata normal form. 241/1633 useless extension candidates. Maximal degree in co-relation 2369. Up to 1085 conditions per place. [2023-09-01 12:29:42,849 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 49 selfloop transitions, 8 changer transitions 10/71 dead transitions. [2023-09-01 12:29:42,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 71 transitions, 661 flow [2023-09-01 12:29:42,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:29:42,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:29:42,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 390 transitions. [2023-09-01 12:29:42,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386740331491713 [2023-09-01 12:29:42,850 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 390 transitions. [2023-09-01 12:29:42,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 390 transitions. [2023-09-01 12:29:42,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:42,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 390 transitions. [2023-09-01 12:29:42,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:42,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:42,852 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:42,853 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 330 flow. Second operand 4 states and 390 transitions. [2023-09-01 12:29:42,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 71 transitions, 661 flow [2023-09-01 12:29:42,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 71 transitions, 652 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:29:42,860 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 379 flow [2023-09-01 12:29:42,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=379, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-09-01 12:29:42,860 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 21 predicate places. [2023-09-01 12:29:42,861 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 379 flow [2023-09-01 12:29:42,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 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 12:29:42,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:42,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:42,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 12:29:42,861 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:29:42,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:42,862 INFO L85 PathProgramCache]: Analyzing trace with hash 477800932, now seen corresponding path program 3 times [2023-09-01 12:29:42,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:42,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989207072] [2023-09-01 12:29:42,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:42,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:42,950 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 12:29:42,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:42,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989207072] [2023-09-01 12:29:42,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989207072] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:29:42,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:29:42,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 12:29:42,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622043184] [2023-09-01 12:29:42,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:29:42,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:29:42,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:42,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:29:42,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:29:42,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-09-01 12:29:42,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 379 flow. Second operand has 5 states, 5 states have (on average 86.8) internal successors, (434), 5 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:42,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:42,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-09-01 12:29:42,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:43,149 INFO L130 PetriNetUnfolder]: 1052/1733 cut-off events. [2023-09-01 12:29:43,149 INFO L131 PetriNetUnfolder]: For 8779/9064 co-relation queries the response was YES. [2023-09-01 12:29:43,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7905 conditions, 1733 events. 1052/1733 cut-off events. For 8779/9064 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 9211 event pairs, 307 based on Foata normal form. 169/1861 useless extension candidates. Maximal degree in co-relation 4650. Up to 894 conditions per place. [2023-09-01 12:29:43,157 INFO L137 encePairwiseOnDemand]: 174/181 looper letters, 65 selfloop transitions, 19 changer transitions 19/105 dead transitions. [2023-09-01 12:29:43,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 105 transitions, 1055 flow [2023-09-01 12:29:43,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 12:29:43,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 12:29:43,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 563 transitions. [2023-09-01 12:29:43,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5184162062615101 [2023-09-01 12:29:43,159 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 563 transitions. [2023-09-01 12:29:43,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 563 transitions. [2023-09-01 12:29:43,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:43,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 563 transitions. [2023-09-01 12:29:43,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.83333333333333) internal successors, (563), 6 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:43,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:43,161 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:43,162 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 379 flow. Second operand 6 states and 563 transitions. [2023-09-01 12:29:43,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 105 transitions, 1055 flow [2023-09-01 12:29:43,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 105 transitions, 992 flow, removed 26 selfloop flow, removed 2 redundant places. [2023-09-01 12:29:43,168 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 550 flow [2023-09-01 12:29:43,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=550, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2023-09-01 12:29:43,168 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 27 predicate places. [2023-09-01 12:29:43,168 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 550 flow [2023-09-01 12:29:43,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.8) internal successors, (434), 5 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:43,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:43,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:43,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 12:29:43,169 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:29:43,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:43,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1700934463, now seen corresponding path program 2 times [2023-09-01 12:29:43,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:43,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417289266] [2023-09-01 12:29:43,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:43,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:43,212 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 12:29:43,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:43,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417289266] [2023-09-01 12:29:43,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417289266] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:29:43,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:29:43,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:29:43,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739679294] [2023-09-01 12:29:43,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:29:43,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:29:43,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:43,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:29:43,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:29:43,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 181 [2023-09-01 12:29:43,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 550 flow. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 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 12:29:43,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:43,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 181 [2023-09-01 12:29:43,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:43,391 INFO L130 PetriNetUnfolder]: 1045/1689 cut-off events. [2023-09-01 12:29:43,392 INFO L131 PetriNetUnfolder]: For 10769/11037 co-relation queries the response was YES. [2023-09-01 12:29:43,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8448 conditions, 1689 events. 1045/1689 cut-off events. For 10769/11037 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8331 event pairs, 301 based on Foata normal form. 200/1824 useless extension candidates. Maximal degree in co-relation 7762. Up to 1238 conditions per place. [2023-09-01 12:29:43,402 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 60 selfloop transitions, 10 changer transitions 10/86 dead transitions. [2023-09-01 12:29:43,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 86 transitions, 941 flow [2023-09-01 12:29:43,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:29:43,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:29:43,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 392 transitions. [2023-09-01 12:29:43,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414364640883977 [2023-09-01 12:29:43,403 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 392 transitions. [2023-09-01 12:29:43,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 392 transitions. [2023-09-01 12:29:43,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:43,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 392 transitions. [2023-09-01 12:29:43,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 98.0) internal successors, (392), 4 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 12:29:43,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:43,406 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:43,406 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 550 flow. Second operand 4 states and 392 transitions. [2023-09-01 12:29:43,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 86 transitions, 941 flow [2023-09-01 12:29:43,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 904 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 12:29:43,416 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 580 flow [2023-09-01 12:29:43,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=580, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2023-09-01 12:29:43,417 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 28 predicate places. [2023-09-01 12:29:43,417 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 580 flow [2023-09-01 12:29:43,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 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 12:29:43,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:43,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:43,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 12:29:43,418 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:29:43,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:43,418 INFO L85 PathProgramCache]: Analyzing trace with hash 2003654564, now seen corresponding path program 4 times [2023-09-01 12:29:43,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:43,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003172430] [2023-09-01 12:29:43,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:43,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:43,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:43,496 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 12:29:43,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:43,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003172430] [2023-09-01 12:29:43,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003172430] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:29:43,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:29:43,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 12:29:43,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581671023] [2023-09-01 12:29:43,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:29:43,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:29:43,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:43,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:29:43,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:29:43,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-09-01 12:29:43,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 580 flow. Second operand has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:43,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:43,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-09-01 12:29:43,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:43,774 INFO L130 PetriNetUnfolder]: 1002/1586 cut-off events. [2023-09-01 12:29:43,774 INFO L131 PetriNetUnfolder]: For 10884/11184 co-relation queries the response was YES. [2023-09-01 12:29:43,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8309 conditions, 1586 events. 1002/1586 cut-off events. For 10884/11184 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 7449 event pairs, 364 based on Foata normal form. 184/1724 useless extension candidates. Maximal degree in co-relation 5291. Up to 1039 conditions per place. [2023-09-01 12:29:43,783 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 56 selfloop transitions, 12 changer transitions 20/90 dead transitions. [2023-09-01 12:29:43,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 90 transitions, 970 flow [2023-09-01 12:29:43,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:29:43,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:29:43,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 474 transitions. [2023-09-01 12:29:43,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.523756906077348 [2023-09-01 12:29:43,786 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 474 transitions. [2023-09-01 12:29:43,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 474 transitions. [2023-09-01 12:29:43,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:43,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 474 transitions. [2023-09-01 12:29:43,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:43,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:43,788 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:43,788 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 580 flow. Second operand 5 states and 474 transitions. [2023-09-01 12:29:43,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 90 transitions, 970 flow [2023-09-01 12:29:43,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 90 transitions, 935 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-09-01 12:29:43,800 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 597 flow [2023-09-01 12:29:43,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=597, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2023-09-01 12:29:43,801 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 32 predicate places. [2023-09-01 12:29:43,802 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 597 flow [2023-09-01 12:29:43,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:43,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:43,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:43,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 12:29:43,802 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:29:43,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:43,803 INFO L85 PathProgramCache]: Analyzing trace with hash 641514423, now seen corresponding path program 3 times [2023-09-01 12:29:43,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:43,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058145163] [2023-09-01 12:29:43,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:43,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:43,886 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 12:29:43,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:43,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058145163] [2023-09-01 12:29:43,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058145163] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:29:43,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:29:43,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:29:43,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023451913] [2023-09-01 12:29:43,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:29:43,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:29:43,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:43,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:29:43,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:29:43,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 181 [2023-09-01 12:29:43,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 597 flow. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 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 12:29:43,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:43,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 181 [2023-09-01 12:29:43,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:44,064 INFO L130 PetriNetUnfolder]: 915/1375 cut-off events. [2023-09-01 12:29:44,064 INFO L131 PetriNetUnfolder]: For 11022/11376 co-relation queries the response was YES. [2023-09-01 12:29:44,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7842 conditions, 1375 events. 915/1375 cut-off events. For 11022/11376 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5997 event pairs, 249 based on Foata normal form. 232/1529 useless extension candidates. Maximal degree in co-relation 6687. Up to 901 conditions per place. [2023-09-01 12:29:44,073 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 54 selfloop transitions, 27 changer transitions 7/94 dead transitions. [2023-09-01 12:29:44,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 94 transitions, 1141 flow [2023-09-01 12:29:44,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:29:44,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:29:44,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 388 transitions. [2023-09-01 12:29:44,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5359116022099447 [2023-09-01 12:29:44,074 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 388 transitions. [2023-09-01 12:29:44,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 388 transitions. [2023-09-01 12:29:44,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:44,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 388 transitions. [2023-09-01 12:29:44,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:44,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:44,076 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:44,076 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 597 flow. Second operand 4 states and 388 transitions. [2023-09-01 12:29:44,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 94 transitions, 1141 flow [2023-09-01 12:29:44,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 94 transitions, 1075 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-09-01 12:29:44,083 INFO L231 Difference]: Finished difference. Result has 59 places, 68 transitions, 834 flow [2023-09-01 12:29:44,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=834, PETRI_PLACES=59, PETRI_TRANSITIONS=68} [2023-09-01 12:29:44,084 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 30 predicate places. [2023-09-01 12:29:44,084 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 68 transitions, 834 flow [2023-09-01 12:29:44,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 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 12:29:44,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:44,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:44,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 12:29:44,084 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:29:44,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:44,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1824626704, now seen corresponding path program 1 times [2023-09-01 12:29:44,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:44,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471312060] [2023-09-01 12:29:44,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:44,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:44,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:44,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:44,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471312060] [2023-09-01 12:29:44,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471312060] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:44,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201717861] [2023-09-01 12:29:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:44,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:44,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:44,145 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 12:29:44,174 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 12:29:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:44,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:29:44,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:44,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:44,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201717861] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:29:44,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:29:44,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-09-01 12:29:44,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126399328] [2023-09-01 12:29:44,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:29:44,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 12:29:44,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:44,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 12:29:44,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 12:29:44,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-09-01 12:29:44,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 68 transitions, 834 flow. Second operand has 8 states, 8 states have (on average 86.5) internal successors, (692), 8 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:44,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:44,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-09-01 12:29:44,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:44,582 INFO L130 PetriNetUnfolder]: 1086/1555 cut-off events. [2023-09-01 12:29:44,582 INFO L131 PetriNetUnfolder]: For 14468/14605 co-relation queries the response was YES. [2023-09-01 12:29:44,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9774 conditions, 1555 events. 1086/1555 cut-off events. For 14468/14605 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 6193 event pairs, 240 based on Foata normal form. 116/1627 useless extension candidates. Maximal degree in co-relation 6510. Up to 1018 conditions per place. [2023-09-01 12:29:44,596 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 81 selfloop transitions, 49 changer transitions 2/136 dead transitions. [2023-09-01 12:29:44,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 136 transitions, 1919 flow [2023-09-01 12:29:44,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 12:29:44,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 12:29:44,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 557 transitions. [2023-09-01 12:29:44,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128913443830571 [2023-09-01 12:29:44,597 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 557 transitions. [2023-09-01 12:29:44,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 557 transitions. [2023-09-01 12:29:44,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:44,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 557 transitions. [2023-09-01 12:29:44,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.83333333333333) internal successors, (557), 6 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:44,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:44,601 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:44,601 INFO L175 Difference]: Start difference. First operand has 59 places, 68 transitions, 834 flow. Second operand 6 states and 557 transitions. [2023-09-01 12:29:44,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 136 transitions, 1919 flow [2023-09-01 12:29:44,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 136 transitions, 1885 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 12:29:44,614 INFO L231 Difference]: Finished difference. Result has 63 places, 104 transitions, 1582 flow [2023-09-01 12:29:44,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1582, PETRI_PLACES=63, PETRI_TRANSITIONS=104} [2023-09-01 12:29:44,615 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2023-09-01 12:29:44,615 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 104 transitions, 1582 flow [2023-09-01 12:29:44,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 86.5) internal successors, (692), 8 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:44,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:44,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:44,626 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 12:29:44,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-09-01 12:29:44,820 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:29:44,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:44,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1346321687, now seen corresponding path program 1 times [2023-09-01 12:29:44,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:44,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231351986] [2023-09-01 12:29:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:44,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:45,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:45,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231351986] [2023-09-01 12:29:45,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231351986] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:45,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785555761] [2023-09-01 12:29:45,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:45,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:45,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:45,110 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 12:29:45,111 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 12:29:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:45,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 12:29:45,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:45,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:45,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785555761] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:29:45,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:29:45,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-09-01 12:29:45,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181114487] [2023-09-01 12:29:45,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:29:45,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:29:45,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:45,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:29:45,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:29:45,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-09-01 12:29:45,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 104 transitions, 1582 flow. Second operand has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:45,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:45,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-09-01 12:29:45,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:45,773 INFO L130 PetriNetUnfolder]: 1418/2025 cut-off events. [2023-09-01 12:29:45,774 INFO L131 PetriNetUnfolder]: For 22489/23121 co-relation queries the response was YES. [2023-09-01 12:29:45,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13604 conditions, 2025 events. 1418/2025 cut-off events. For 22489/23121 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8150 event pairs, 48 based on Foata normal form. 155/2070 useless extension candidates. Maximal degree in co-relation 12560. Up to 1439 conditions per place. [2023-09-01 12:29:45,788 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 127 selfloop transitions, 55 changer transitions 2/195 dead transitions. [2023-09-01 12:29:45,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 195 transitions, 2593 flow [2023-09-01 12:29:45,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:29:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:29:45,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 858 transitions. [2023-09-01 12:29:45,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267034990791897 [2023-09-01 12:29:45,790 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 858 transitions. [2023-09-01 12:29:45,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 858 transitions. [2023-09-01 12:29:45,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:45,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 858 transitions. [2023-09-01 12:29:45,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 95.33333333333333) internal successors, (858), 9 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:45,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:45,794 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:45,794 INFO L175 Difference]: Start difference. First operand has 63 places, 104 transitions, 1582 flow. Second operand 9 states and 858 transitions. [2023-09-01 12:29:45,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 195 transitions, 2593 flow [2023-09-01 12:29:45,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 195 transitions, 2405 flow, removed 82 selfloop flow, removed 1 redundant places. [2023-09-01 12:29:45,812 INFO L231 Difference]: Finished difference. Result has 73 places, 135 transitions, 2039 flow [2023-09-01 12:29:45,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2039, PETRI_PLACES=73, PETRI_TRANSITIONS=135} [2023-09-01 12:29:45,814 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2023-09-01 12:29:45,814 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 135 transitions, 2039 flow [2023-09-01 12:29:45,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:45,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:45,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:45,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 12:29:46,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 12:29:46,025 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:29:46,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:46,026 INFO L85 PathProgramCache]: Analyzing trace with hash 684593127, now seen corresponding path program 2 times [2023-09-01 12:29:46,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:46,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879557945] [2023-09-01 12:29:46,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:46,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:46,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:46,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879557945] [2023-09-01 12:29:46,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879557945] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:46,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465694244] [2023-09-01 12:29:46,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:29:46,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:46,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:46,250 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 12:29:46,273 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 12:29:46,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:29:46,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:29:46,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 12:29:46,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:46,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:46,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465694244] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:29:46,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:29:46,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 10 [2023-09-01 12:29:46,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822523158] [2023-09-01 12:29:46,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:29:46,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:29:46,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:46,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:29:46,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:29:46,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-09-01 12:29:46,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 135 transitions, 2039 flow. Second operand has 12 states, 12 states have (on average 88.16666666666667) internal successors, (1058), 12 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:46,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:46,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-09-01 12:29:46,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:46,896 INFO L130 PetriNetUnfolder]: 1752/2515 cut-off events. [2023-09-01 12:29:46,896 INFO L131 PetriNetUnfolder]: For 28904/29412 co-relation queries the response was YES. [2023-09-01 12:29:46,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17049 conditions, 2515 events. 1752/2515 cut-off events. For 28904/29412 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 10618 event pairs, 188 based on Foata normal form. 149/2542 useless extension candidates. Maximal degree in co-relation 16355. Up to 1963 conditions per place. [2023-09-01 12:29:46,913 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 142 selfloop transitions, 55 changer transitions 2/210 dead transitions. [2023-09-01 12:29:46,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 210 transitions, 2913 flow [2023-09-01 12:29:46,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:29:46,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:29:46,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 854 transitions. [2023-09-01 12:29:46,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5242480049109883 [2023-09-01 12:29:46,915 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 854 transitions. [2023-09-01 12:29:46,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 854 transitions. [2023-09-01 12:29:46,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:46,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 854 transitions. [2023-09-01 12:29:46,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.88888888888889) internal successors, (854), 9 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:46,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:46,919 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:46,919 INFO L175 Difference]: Start difference. First operand has 73 places, 135 transitions, 2039 flow. Second operand 9 states and 854 transitions. [2023-09-01 12:29:46,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 210 transitions, 2913 flow [2023-09-01 12:29:46,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 210 transitions, 2673 flow, removed 108 selfloop flow, removed 1 redundant places. [2023-09-01 12:29:46,943 INFO L231 Difference]: Finished difference. Result has 83 places, 154 transitions, 2238 flow [2023-09-01 12:29:46,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=1799, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2238, PETRI_PLACES=83, PETRI_TRANSITIONS=154} [2023-09-01 12:29:46,944 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 54 predicate places. [2023-09-01 12:29:46,944 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 154 transitions, 2238 flow [2023-09-01 12:29:46,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 88.16666666666667) internal successors, (1058), 12 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:46,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:46,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:46,955 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 12:29:47,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:47,149 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:29:47,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:47,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1615995569, now seen corresponding path program 3 times [2023-09-01 12:29:47,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:47,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982314526] [2023-09-01 12:29:47,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:47,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:47,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:47,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982314526] [2023-09-01 12:29:47,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982314526] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:47,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4628491] [2023-09-01 12:29:47,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:29:47,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:47,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:47,365 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 12:29:47,429 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 12:29:47,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:29:47,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:29:47,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 12:29:47,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:47,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:47,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4628491] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:29:47,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:29:47,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-09-01 12:29:47,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324442589] [2023-09-01 12:29:47,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:29:47,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:29:47,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:47,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:29:47,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:29:47,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-09-01 12:29:47,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 154 transitions, 2238 flow. Second operand has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:47,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:47,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-09-01 12:29:47,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:48,193 INFO L130 PetriNetUnfolder]: 2212/3181 cut-off events. [2023-09-01 12:29:48,193 INFO L131 PetriNetUnfolder]: For 36433/37003 co-relation queries the response was YES. [2023-09-01 12:29:48,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20923 conditions, 3181 events. 2212/3181 cut-off events. For 36433/37003 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13981 event pairs, 350 based on Foata normal form. 183/3222 useless extension candidates. Maximal degree in co-relation 20423. Up to 2597 conditions per place. [2023-09-01 12:29:48,218 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 173 selfloop transitions, 60 changer transitions 2/246 dead transitions. [2023-09-01 12:29:48,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 246 transitions, 3494 flow [2023-09-01 12:29:48,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:29:48,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:29:48,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 854 transitions. [2023-09-01 12:29:48,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5242480049109883 [2023-09-01 12:29:48,221 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 854 transitions. [2023-09-01 12:29:48,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 854 transitions. [2023-09-01 12:29:48,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:48,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 854 transitions. [2023-09-01 12:29:48,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.88888888888889) internal successors, (854), 9 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:48,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:48,226 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:48,226 INFO L175 Difference]: Start difference. First operand has 83 places, 154 transitions, 2238 flow. Second operand 9 states and 854 transitions. [2023-09-01 12:29:48,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 246 transitions, 3494 flow [2023-09-01 12:29:48,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 246 transitions, 3273 flow, removed 88 selfloop flow, removed 2 redundant places. [2023-09-01 12:29:48,260 INFO L231 Difference]: Finished difference. Result has 93 places, 190 transitions, 2823 flow [2023-09-01 12:29:48,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=2017, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2823, PETRI_PLACES=93, PETRI_TRANSITIONS=190} [2023-09-01 12:29:48,261 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 64 predicate places. [2023-09-01 12:29:48,261 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 190 transitions, 2823 flow [2023-09-01 12:29:48,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:48,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:48,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:48,277 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 12:29:48,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:48,467 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:29:48,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:48,467 INFO L85 PathProgramCache]: Analyzing trace with hash -965213615, now seen corresponding path program 4 times [2023-09-01 12:29:48,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:48,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895746286] [2023-09-01 12:29:48,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:48,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:48,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:48,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895746286] [2023-09-01 12:29:48,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895746286] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:48,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455759270] [2023-09-01 12:29:48,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:29:48,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:48,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:48,642 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 12:29:48,643 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 12:29:48,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:29:48,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:29:48,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 12:29:48,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:48,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:48,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:48,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455759270] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:29:48,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:29:48,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-09-01 12:29:48,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412346867] [2023-09-01 12:29:48,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:29:48,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 12:29:48,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:48,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 12:29:48,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:29:48,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-09-01 12:29:48,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 190 transitions, 2823 flow. Second operand has 9 states, 9 states have (on average 88.33333333333333) internal successors, (795), 9 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:48,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:48,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-09-01 12:29:48,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:49,383 INFO L130 PetriNetUnfolder]: 2520/3633 cut-off events. [2023-09-01 12:29:49,384 INFO L131 PetriNetUnfolder]: For 43800/44378 co-relation queries the response was YES. [2023-09-01 12:29:49,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23906 conditions, 3633 events. 2520/3633 cut-off events. For 43800/44378 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 16416 event pairs, 494 based on Foata normal form. 175/3660 useless extension candidates. Maximal degree in co-relation 23393. Up to 3113 conditions per place. [2023-09-01 12:29:49,414 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 186 selfloop transitions, 60 changer transitions 2/259 dead transitions. [2023-09-01 12:29:49,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 259 transitions, 3865 flow [2023-09-01 12:29:49,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:29:49,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:29:49,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 848 transitions. [2023-09-01 12:29:49,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5205647636586863 [2023-09-01 12:29:49,423 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 848 transitions. [2023-09-01 12:29:49,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 848 transitions. [2023-09-01 12:29:49,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:49,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 848 transitions. [2023-09-01 12:29:49,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.22222222222223) internal successors, (848), 9 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:49,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:49,438 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:49,438 INFO L175 Difference]: Start difference. First operand has 93 places, 190 transitions, 2823 flow. Second operand 9 states and 848 transitions. [2023-09-01 12:29:49,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 259 transitions, 3865 flow [2023-09-01 12:29:49,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 259 transitions, 3537 flow, removed 152 selfloop flow, removed 1 redundant places. [2023-09-01 12:29:49,492 INFO L231 Difference]: Finished difference. Result has 103 places, 209 transitions, 3016 flow [2023-09-01 12:29:49,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=2495, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3016, PETRI_PLACES=103, PETRI_TRANSITIONS=209} [2023-09-01 12:29:49,492 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 74 predicate places. [2023-09-01 12:29:49,492 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 209 transitions, 3016 flow [2023-09-01 12:29:49,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 88.33333333333333) internal successors, (795), 9 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:49,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:49,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:49,500 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 12:29:49,697 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,SelfDestructingSolverStorable14 [2023-09-01 12:29:49,698 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:29:49,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:49,700 INFO L85 PathProgramCache]: Analyzing trace with hash 453609461, now seen corresponding path program 5 times [2023-09-01 12:29:49,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:49,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131217428] [2023-09-01 12:29:49,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:49,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:49,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:49,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131217428] [2023-09-01 12:29:49,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131217428] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:49,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538562455] [2023-09-01 12:29:49,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:29:49,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:49,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:49,861 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 12:29:49,864 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 12:29:49,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 12:29:49,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:29:49,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 12:29:49,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:50,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:50,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:29:50,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538562455] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:29:50,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:29:50,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-09-01 12:29:50,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668113867] [2023-09-01 12:29:50,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:29:50,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:29:50,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:50,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:29:50,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:29:50,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-09-01 12:29:50,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 209 transitions, 3016 flow. Second operand has 10 states, 10 states have (on average 88.7) internal successors, (887), 10 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:50,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:50,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-09-01 12:29:50,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:50,647 INFO L130 PetriNetUnfolder]: 2914/4205 cut-off events. [2023-09-01 12:29:50,648 INFO L131 PetriNetUnfolder]: For 49997/50637 co-relation queries the response was YES. [2023-09-01 12:29:50,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27200 conditions, 4205 events. 2914/4205 cut-off events. For 49997/50637 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19652 event pairs, 614 based on Foata normal form. 205/4256 useless extension candidates. Maximal degree in co-relation 26645. Up to 3685 conditions per place. [2023-09-01 12:29:50,673 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 220 selfloop transitions, 61 changer transitions 2/294 dead transitions. [2023-09-01 12:29:50,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 294 transitions, 4461 flow [2023-09-01 12:29:50,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:29:50,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:29:50,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 846 transitions. [2023-09-01 12:29:50,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193370165745856 [2023-09-01 12:29:50,675 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 846 transitions. [2023-09-01 12:29:50,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 846 transitions. [2023-09-01 12:29:50,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:50,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 846 transitions. [2023-09-01 12:29:50,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.0) internal successors, (846), 9 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:50,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:50,679 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:50,679 INFO L175 Difference]: Start difference. First operand has 103 places, 209 transitions, 3016 flow. Second operand 9 states and 846 transitions. [2023-09-01 12:29:50,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 294 transitions, 4461 flow [2023-09-01 12:29:50,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 294 transitions, 4174 flow, removed 120 selfloop flow, removed 2 redundant places. [2023-09-01 12:29:50,727 INFO L231 Difference]: Finished difference. Result has 113 places, 246 transitions, 3631 flow [2023-09-01 12:29:50,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=2729, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3631, PETRI_PLACES=113, PETRI_TRANSITIONS=246} [2023-09-01 12:29:50,728 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 84 predicate places. [2023-09-01 12:29:50,728 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 246 transitions, 3631 flow [2023-09-01 12:29:50,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 88.7) internal successors, (887), 10 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:50,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:50,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:50,734 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 12:29:50,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 12:29:50,934 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:29:50,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:50,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1955925559, now seen corresponding path program 6 times [2023-09-01 12:29:50,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:50,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027821367] [2023-09-01 12:29:50,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:50,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:51,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:51,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027821367] [2023-09-01 12:29:51,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027821367] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:51,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784319454] [2023-09-01 12:29:51,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:29:51,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:51,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:51,081 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:29:51,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 12:29:51,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 12:29:51,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:29:51,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 12:29:51,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:51,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:51,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784319454] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:29:51,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:29:51,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-09-01 12:29:51,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510711254] [2023-09-01 12:29:51,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:29:51,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:29:51,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:51,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:29:51,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:29:51,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-09-01 12:29:51,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 246 transitions, 3631 flow. Second operand has 10 states, 10 states have (on average 88.6) internal successors, (886), 10 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:51,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:51,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-09-01 12:29:51,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:51,889 INFO L130 PetriNetUnfolder]: 3248/4695 cut-off events. [2023-09-01 12:29:51,889 INFO L131 PetriNetUnfolder]: For 58768/59424 co-relation queries the response was YES. [2023-09-01 12:29:51,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30469 conditions, 4695 events. 3248/4695 cut-off events. For 58768/59424 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 22527 event pairs, 766 based on Foata normal form. 219/4762 useless extension candidates. Maximal degree in co-relation 29879. Up to 4143 conditions per place. [2023-09-01 12:29:51,916 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 241 selfloop transitions, 61 changer transitions 2/315 dead transitions. [2023-09-01 12:29:51,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 315 transitions, 4864 flow [2023-09-01 12:29:51,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:29:51,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:29:51,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 848 transitions. [2023-09-01 12:29:51,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5205647636586863 [2023-09-01 12:29:51,918 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 848 transitions. [2023-09-01 12:29:51,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 848 transitions. [2023-09-01 12:29:51,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:51,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 848 transitions. [2023-09-01 12:29:51,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.22222222222223) internal successors, (848), 9 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:51,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:51,922 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:51,922 INFO L175 Difference]: Start difference. First operand has 113 places, 246 transitions, 3631 flow. Second operand 9 states and 848 transitions. [2023-09-01 12:29:51,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 315 transitions, 4864 flow [2023-09-01 12:29:51,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 315 transitions, 4480 flow, removed 180 selfloop flow, removed 1 redundant places. [2023-09-01 12:29:51,979 INFO L231 Difference]: Finished difference. Result has 123 places, 265 transitions, 3829 flow [2023-09-01 12:29:51,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=3247, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3829, PETRI_PLACES=123, PETRI_TRANSITIONS=265} [2023-09-01 12:29:51,980 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 94 predicate places. [2023-09-01 12:29:51,980 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 265 transitions, 3829 flow [2023-09-01 12:29:51,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 88.6) internal successors, (886), 10 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:51,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:51,981 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:51,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-09-01 12:29:52,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:52,188 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:29:52,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:52,188 INFO L85 PathProgramCache]: Analyzing trace with hash 398392542, now seen corresponding path program 7 times [2023-09-01 12:29:52,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:52,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454958937] [2023-09-01 12:29:52,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:52,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:52,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:52,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454958937] [2023-09-01 12:29:52,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454958937] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:52,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205897756] [2023-09-01 12:29:52,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:29:52,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:52,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:52,272 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:29:52,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 12:29:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:52,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 12:29:52,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:52,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:52,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205897756] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:29:52,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:29:52,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-09-01 12:29:52,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655171899] [2023-09-01 12:29:52,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:29:52,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:29:52,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:52,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:29:52,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:29:52,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-09-01 12:29:52,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 265 transitions, 3829 flow. Second operand has 12 states, 12 states have (on average 87.0) internal successors, (1044), 12 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:52,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:52,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-09-01 12:29:52,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:53,645 INFO L130 PetriNetUnfolder]: 6025/8816 cut-off events. [2023-09-01 12:29:53,645 INFO L131 PetriNetUnfolder]: For 95826/96115 co-relation queries the response was YES. [2023-09-01 12:29:53,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53796 conditions, 8816 events. 6025/8816 cut-off events. For 95826/96115 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 45744 event pairs, 1153 based on Foata normal form. 211/8954 useless extension candidates. Maximal degree in co-relation 52165. Up to 2469 conditions per place. [2023-09-01 12:29:53,699 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 384 selfloop transitions, 114 changer transitions 0/502 dead transitions. [2023-09-01 12:29:53,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 502 transitions, 7721 flow [2023-09-01 12:29:53,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 12:29:53,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 12:29:53,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 960 transitions. [2023-09-01 12:29:53,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303867403314917 [2023-09-01 12:29:53,701 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 960 transitions. [2023-09-01 12:29:53,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 960 transitions. [2023-09-01 12:29:53,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:53,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 960 transitions. [2023-09-01 12:29:53,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:53,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 181.0) internal successors, (1991), 11 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:53,705 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 181.0) internal successors, (1991), 11 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:53,705 INFO L175 Difference]: Start difference. First operand has 123 places, 265 transitions, 3829 flow. Second operand 10 states and 960 transitions. [2023-09-01 12:29:53,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 502 transitions, 7721 flow [2023-09-01 12:29:53,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 502 transitions, 7139 flow, removed 264 selfloop flow, removed 2 redundant places. [2023-09-01 12:29:53,899 INFO L231 Difference]: Finished difference. Result has 137 places, 313 transitions, 4577 flow [2023-09-01 12:29:53,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=3475, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4577, PETRI_PLACES=137, PETRI_TRANSITIONS=313} [2023-09-01 12:29:53,899 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 108 predicate places. [2023-09-01 12:29:53,899 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 313 transitions, 4577 flow [2023-09-01 12:29:53,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 87.0) internal successors, (1044), 12 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:53,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:53,900 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:53,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-09-01 12:29:54,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 12:29:54,105 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:29:54,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:54,106 INFO L85 PathProgramCache]: Analyzing trace with hash 370733874, now seen corresponding path program 8 times [2023-09-01 12:29:54,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:54,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827438385] [2023-09-01 12:29:54,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:54,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:29:54,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:54,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827438385] [2023-09-01 12:29:54,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827438385] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:54,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824723835] [2023-09-01 12:29:54,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:29:54,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:54,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:54,192 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:29:54,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 12:29:54,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:29:54,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:29:54,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 12:29:54,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:29:54,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:29:54,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824723835] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:29:54,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:29:54,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 12:29:54,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926776289] [2023-09-01 12:29:54,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:29:54,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:29:54,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:54,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:29:54,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:29:54,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-09-01 12:29:54,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 313 transitions, 4577 flow. Second operand has 12 states, 12 states have (on average 86.58333333333333) internal successors, (1039), 12 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:54,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:54,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-09-01 12:29:54,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:55,773 INFO L130 PetriNetUnfolder]: 6565/9804 cut-off events. [2023-09-01 12:29:55,773 INFO L131 PetriNetUnfolder]: For 131046/131428 co-relation queries the response was YES. [2023-09-01 12:29:55,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60324 conditions, 9804 events. 6565/9804 cut-off events. For 131046/131428 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 55284 event pairs, 1032 based on Foata normal form. 379/10130 useless extension candidates. Maximal degree in co-relation 58619. Up to 3362 conditions per place. [2023-09-01 12:29:55,911 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 542 selfloop transitions, 161 changer transitions 0/707 dead transitions. [2023-09-01 12:29:55,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 707 transitions, 10612 flow [2023-09-01 12:29:55,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 12:29:55,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 12:29:55,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1132 transitions. [2023-09-01 12:29:55,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5211786372007366 [2023-09-01 12:29:55,914 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1132 transitions. [2023-09-01 12:29:55,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1132 transitions. [2023-09-01 12:29:55,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:55,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1132 transitions. [2023-09-01 12:29:55,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 94.33333333333333) internal successors, (1132), 12 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:55,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 181.0) internal successors, (2353), 13 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:55,919 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 181.0) internal successors, (2353), 13 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:55,919 INFO L175 Difference]: Start difference. First operand has 137 places, 313 transitions, 4577 flow. Second operand 12 states and 1132 transitions. [2023-09-01 12:29:55,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 707 transitions, 10612 flow [2023-09-01 12:29:56,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 707 transitions, 10519 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-09-01 12:29:56,132 INFO L231 Difference]: Finished difference. Result has 152 places, 399 transitions, 6312 flow [2023-09-01 12:29:56,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=4507, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6312, PETRI_PLACES=152, PETRI_TRANSITIONS=399} [2023-09-01 12:29:56,133 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 123 predicate places. [2023-09-01 12:29:56,133 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 399 transitions, 6312 flow [2023-09-01 12:29:56,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 86.58333333333333) internal successors, (1039), 12 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:56,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:56,134 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:56,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 12:29:56,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:56,338 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:29:56,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:56,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1508408662, now seen corresponding path program 9 times [2023-09-01 12:29:56,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:56,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855210712] [2023-09-01 12:29:56,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:56,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:56,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:56,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:56,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855210712] [2023-09-01 12:29:56,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855210712] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:56,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375981427] [2023-09-01 12:29:56,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:29:56,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:56,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:56,440 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:29:56,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 12:29:56,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 12:29:56,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:29:56,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 12:29:56,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:56,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:56,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375981427] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:29:56,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:29:56,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2023-09-01 12:29:56,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078641693] [2023-09-01 12:29:56,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:29:56,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 12:29:56,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:56,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 12:29:56,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-09-01 12:29:56,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 181 [2023-09-01 12:29:56,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 399 transitions, 6312 flow. Second operand has 13 states, 13 states have (on average 84.61538461538461) internal successors, (1100), 13 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:56,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:56,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 181 [2023-09-01 12:29:56,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:59,054 INFO L130 PetriNetUnfolder]: 9129/13642 cut-off events. [2023-09-01 12:29:59,054 INFO L131 PetriNetUnfolder]: For 192789/192789 co-relation queries the response was YES. [2023-09-01 12:29:59,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96810 conditions, 13642 events. 9129/13642 cut-off events. For 192789/192789 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 79594 event pairs, 1429 based on Foata normal form. 136/13778 useless extension candidates. Maximal degree in co-relation 94851. Up to 3821 conditions per place. [2023-09-01 12:29:59,147 INFO L137 encePairwiseOnDemand]: 174/181 looper letters, 482 selfloop transitions, 314 changer transitions 0/796 dead transitions. [2023-09-01 12:29:59,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 796 transitions, 14072 flow [2023-09-01 12:29:59,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 12:29:59,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 12:29:59,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1750 transitions. [2023-09-01 12:29:59,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088688572259378 [2023-09-01 12:29:59,150 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1750 transitions. [2023-09-01 12:29:59,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1750 transitions. [2023-09-01 12:29:59,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:59,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1750 transitions. [2023-09-01 12:29:59,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 92.10526315789474) internal successors, (1750), 19 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:59,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 181.0) internal successors, (3620), 20 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:59,155 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 181.0) internal successors, (3620), 20 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:59,155 INFO L175 Difference]: Start difference. First operand has 152 places, 399 transitions, 6312 flow. Second operand 19 states and 1750 transitions. [2023-09-01 12:29:59,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 796 transitions, 14072 flow [2023-09-01 12:29:59,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 796 transitions, 13414 flow, removed 239 selfloop flow, removed 1 redundant places. [2023-09-01 12:29:59,802 INFO L231 Difference]: Finished difference. Result has 181 places, 544 transitions, 9924 flow [2023-09-01 12:29:59,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=5960, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9924, PETRI_PLACES=181, PETRI_TRANSITIONS=544} [2023-09-01 12:29:59,803 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 152 predicate places. [2023-09-01 12:29:59,803 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 544 transitions, 9924 flow [2023-09-01 12:29:59,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 84.61538461538461) internal successors, (1100), 13 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:59,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:59,803 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:59,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-09-01 12:30:00,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:30:00,009 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:30:00,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:30:00,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1869920993, now seen corresponding path program 10 times [2023-09-01 12:30:00,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:30:00,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332190988] [2023-09-01 12:30:00,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:30:00,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:30:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:30:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:00,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:30:00,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332190988] [2023-09-01 12:30:00,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332190988] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:30:00,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570583918] [2023-09-01 12:30:00,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:30:00,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:30:00,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:30:00,200 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:30:00,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 12:30:00,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:30:00,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:30:00,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 12:30:00,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:30:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:00,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:30:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:00,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570583918] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:30:00,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:30:00,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 12:30:00,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682915699] [2023-09-01 12:30:00,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:30:00,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:30:00,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:30:00,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:30:00,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:30:00,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-09-01 12:30:00,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 544 transitions, 9924 flow. Second operand has 12 states, 12 states have (on average 87.0) internal successors, (1044), 12 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:00,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:30:00,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-09-01 12:30:00,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:30:03,501 INFO L130 PetriNetUnfolder]: 9529/14689 cut-off events. [2023-09-01 12:30:03,502 INFO L131 PetriNetUnfolder]: For 321607/321954 co-relation queries the response was YES. [2023-09-01 12:30:03,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112168 conditions, 14689 events. 9529/14689 cut-off events. For 321607/321954 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 93071 event pairs, 1858 based on Foata normal form. 651/15306 useless extension candidates. Maximal degree in co-relation 110057. Up to 5162 conditions per place. [2023-09-01 12:30:03,657 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 627 selfloop transitions, 309 changer transitions 57/1000 dead transitions. [2023-09-01 12:30:03,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 1000 transitions, 19252 flow [2023-09-01 12:30:03,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 12:30:03,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 12:30:03,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1124 transitions. [2023-09-01 12:30:03,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174953959484346 [2023-09-01 12:30:03,659 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1124 transitions. [2023-09-01 12:30:03,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1124 transitions. [2023-09-01 12:30:03,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:30:03,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1124 transitions. [2023-09-01 12:30:03,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.66666666666667) internal successors, (1124), 12 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:03,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 181.0) internal successors, (2353), 13 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:03,663 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 181.0) internal successors, (2353), 13 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:03,663 INFO L175 Difference]: Start difference. First operand has 181 places, 544 transitions, 9924 flow. Second operand 12 states and 1124 transitions. [2023-09-01 12:30:03,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 1000 transitions, 19252 flow [2023-09-01 12:30:05,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 1000 transitions, 18400 flow, removed 426 selfloop flow, removed 0 redundant places. [2023-09-01 12:30:05,267 INFO L231 Difference]: Finished difference. Result has 196 places, 662 transitions, 12095 flow [2023-09-01 12:30:05,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=9340, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12095, PETRI_PLACES=196, PETRI_TRANSITIONS=662} [2023-09-01 12:30:05,267 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 167 predicate places. [2023-09-01 12:30:05,268 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 662 transitions, 12095 flow [2023-09-01 12:30:05,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 87.0) internal successors, (1044), 12 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:05,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:30:05,268 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:30:05,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-09-01 12:30:05,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-09-01 12:30:05,474 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:30:05,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:30:05,474 INFO L85 PathProgramCache]: Analyzing trace with hash 759710336, now seen corresponding path program 11 times [2023-09-01 12:30:05,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:30:05,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802522312] [2023-09-01 12:30:05,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:30:05,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:30:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:30:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:05,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:30:05,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802522312] [2023-09-01 12:30:05,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802522312] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:30:05,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705672954] [2023-09-01 12:30:05,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:30:05,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:30:05,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:30:05,586 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:30:05,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 12:30:05,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 12:30:05,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:30:05,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 12:30:05,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:30:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:05,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:30:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:05,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705672954] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:30:05,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:30:05,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-09-01 12:30:05,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827068319] [2023-09-01 12:30:05,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:30:05,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 12:30:05,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:30:05,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 12:30:05,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-09-01 12:30:05,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-09-01 12:30:05,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 662 transitions, 12095 flow. Second operand has 16 states, 16 states have (on average 85.1875) internal successors, (1363), 16 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:05,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:30:05,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-09-01 12:30:05,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:30:10,012 INFO L130 PetriNetUnfolder]: 12256/18912 cut-off events. [2023-09-01 12:30:10,012 INFO L131 PetriNetUnfolder]: For 510180/511167 co-relation queries the response was YES. [2023-09-01 12:30:10,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154470 conditions, 18912 events. 12256/18912 cut-off events. For 510180/511167 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 125729 event pairs, 3713 based on Foata normal form. 525/19315 useless extension candidates. Maximal degree in co-relation 153036. Up to 7877 conditions per place. [2023-09-01 12:30:10,179 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 538 selfloop transitions, 527 changer transitions 0/1074 dead transitions. [2023-09-01 12:30:10,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 1074 transitions, 21588 flow [2023-09-01 12:30:10,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 12:30:10,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 12:30:10,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1431 transitions. [2023-09-01 12:30:10,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270718232044199 [2023-09-01 12:30:10,182 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1431 transitions. [2023-09-01 12:30:10,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1431 transitions. [2023-09-01 12:30:10,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:30:10,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1431 transitions. [2023-09-01 12:30:10,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 95.4) internal successors, (1431), 15 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:10,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 181.0) internal successors, (2896), 16 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:10,185 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 181.0) internal successors, (2896), 16 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:10,185 INFO L175 Difference]: Start difference. First operand has 196 places, 662 transitions, 12095 flow. Second operand 15 states and 1431 transitions. [2023-09-01 12:30:10,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 1074 transitions, 21588 flow [2023-09-01 12:30:12,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 1074 transitions, 20884 flow, removed 352 selfloop flow, removed 0 redundant places. [2023-09-01 12:30:12,888 INFO L231 Difference]: Finished difference. Result has 218 places, 808 transitions, 16694 flow [2023-09-01 12:30:12,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=11895, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=16694, PETRI_PLACES=218, PETRI_TRANSITIONS=808} [2023-09-01 12:30:12,889 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 189 predicate places. [2023-09-01 12:30:12,889 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 808 transitions, 16694 flow [2023-09-01 12:30:12,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 85.1875) internal successors, (1363), 16 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:12,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:30:12,890 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:30:12,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-09-01 12:30:13,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-09-01 12:30:13,094 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:30:13,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:30:13,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1097498205, now seen corresponding path program 12 times [2023-09-01 12:30:13,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:30:13,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563796243] [2023-09-01 12:30:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:30:13,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:30:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:30:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:30:13,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:30:13,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563796243] [2023-09-01 12:30:13,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563796243] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:30:13,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041138932] [2023-09-01 12:30:13,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:30:13,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:30:13,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:30:13,186 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:30:13,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 12:30:13,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 12:30:13,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:30:13,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 12:30:13,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:30:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:13,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:30:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:13,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041138932] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:30:13,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:30:13,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-09-01 12:30:13,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890384792] [2023-09-01 12:30:13,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:30:13,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 12:30:13,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:30:13,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 12:30:13,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-09-01 12:30:13,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-09-01 12:30:13,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 808 transitions, 16694 flow. Second operand has 16 states, 16 states have (on average 82.5625) internal successors, (1321), 16 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:13,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:30:13,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-09-01 12:30:13,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:30:19,844 INFO L130 PetriNetUnfolder]: 16344/24921 cut-off events. [2023-09-01 12:30:19,844 INFO L131 PetriNetUnfolder]: For 621132/621132 co-relation queries the response was YES. [2023-09-01 12:30:20,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222877 conditions, 24921 events. 16344/24921 cut-off events. For 621132/621132 co-relation queries the response was YES. Maximal size of possible extension queue 1062. Compared 168448 event pairs, 1979 based on Foata normal form. 384/25305 useless extension candidates. Maximal degree in co-relation 219924. Up to 7259 conditions per place. [2023-09-01 12:30:20,339 INFO L137 encePairwiseOnDemand]: 173/181 looper letters, 744 selfloop transitions, 870 changer transitions 24/1638 dead transitions. [2023-09-01 12:30:20,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 1638 transitions, 39416 flow [2023-09-01 12:30:20,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-09-01 12:30:20,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-09-01 12:30:20,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3544 transitions. [2023-09-01 12:30:20,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895027624309392 [2023-09-01 12:30:20,361 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3544 transitions. [2023-09-01 12:30:20,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3544 transitions. [2023-09-01 12:30:20,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:30:20,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3544 transitions. [2023-09-01 12:30:20,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 88.6) internal successors, (3544), 40 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:20,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 181.0) internal successors, (7421), 41 states have internal predecessors, (7421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:20,532 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 181.0) internal successors, (7421), 41 states have internal predecessors, (7421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:20,532 INFO L175 Difference]: Start difference. First operand has 218 places, 808 transitions, 16694 flow. Second operand 40 states and 3544 transitions. [2023-09-01 12:30:20,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 1638 transitions, 39416 flow [2023-09-01 12:30:24,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 1638 transitions, 38159 flow, removed 281 selfloop flow, removed 4 redundant places. [2023-09-01 12:30:24,042 INFO L231 Difference]: Finished difference. Result has 277 places, 1239 transitions, 30160 flow [2023-09-01 12:30:24,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=16000, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=801, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=30160, PETRI_PLACES=277, PETRI_TRANSITIONS=1239} [2023-09-01 12:30:24,043 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 248 predicate places. [2023-09-01 12:30:24,043 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 1239 transitions, 30160 flow [2023-09-01 12:30:24,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.5625) internal successors, (1321), 16 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:24,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:30:24,044 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:30:24,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 12:30:24,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-09-01 12:30:24,249 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:30:24,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:30:24,249 INFO L85 PathProgramCache]: Analyzing trace with hash -675327254, now seen corresponding path program 13 times [2023-09-01 12:30:24,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:30:24,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404584413] [2023-09-01 12:30:24,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:30:24,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:30:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:30:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:30:24,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:30:24,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404584413] [2023-09-01 12:30:24,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404584413] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:30:24,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124275340] [2023-09-01 12:30:24,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:30:24,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:30:24,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:30:24,341 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:30:24,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 12:30:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:30:24,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 12:30:24,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:30:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:30:24,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:30:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:30:24,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124275340] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:30:24,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:30:24,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-09-01 12:30:24,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723422627] [2023-09-01 12:30:24,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:30:24,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 12:30:24,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:30:24,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 12:30:24,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-09-01 12:30:24,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-09-01 12:30:24,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 1239 transitions, 30160 flow. Second operand has 15 states, 15 states have (on average 86.26666666666667) internal successors, (1294), 15 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:24,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:30:24,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-09-01 12:30:24,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:30:33,902 INFO L130 PetriNetUnfolder]: 17362/27169 cut-off events. [2023-09-01 12:30:33,902 INFO L131 PetriNetUnfolder]: For 973421/974450 co-relation queries the response was YES. [2023-09-01 12:30:34,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258734 conditions, 27169 events. 17362/27169 cut-off events. For 973421/974450 co-relation queries the response was YES. Maximal size of possible extension queue 1191. Compared 196745 event pairs, 2900 based on Foata normal form. 954/28070 useless extension candidates. Maximal degree in co-relation 256737. Up to 8079 conditions per place. [2023-09-01 12:30:34,226 INFO L137 encePairwiseOnDemand]: 174/181 looper letters, 942 selfloop transitions, 837 changer transitions 31/1825 dead transitions. [2023-09-01 12:30:34,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1825 transitions, 44035 flow [2023-09-01 12:30:34,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 12:30:34,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 12:30:34,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1998 transitions. [2023-09-01 12:30:34,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256511444356748 [2023-09-01 12:30:34,238 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1998 transitions. [2023-09-01 12:30:34,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1998 transitions. [2023-09-01 12:30:34,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:30:34,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1998 transitions. [2023-09-01 12:30:34,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 95.14285714285714) internal successors, (1998), 21 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:34,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:34,253 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:34,254 INFO L175 Difference]: Start difference. First operand has 277 places, 1239 transitions, 30160 flow. Second operand 21 states and 1998 transitions. [2023-09-01 12:30:34,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1825 transitions, 44035 flow [2023-09-01 12:30:39,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 1825 transitions, 39708 flow, removed 1774 selfloop flow, removed 3 redundant places. [2023-09-01 12:30:39,490 INFO L231 Difference]: Finished difference. Result has 301 places, 1314 transitions, 30347 flow [2023-09-01 12:30:39,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=25900, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=723, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=30347, PETRI_PLACES=301, PETRI_TRANSITIONS=1314} [2023-09-01 12:30:39,491 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 272 predicate places. [2023-09-01 12:30:39,491 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 1314 transitions, 30347 flow [2023-09-01 12:30:39,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 86.26666666666667) internal successors, (1294), 15 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:39,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:30:39,492 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:30:39,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-09-01 12:30:39,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:30:39,696 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:30:39,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:30:39,696 INFO L85 PathProgramCache]: Analyzing trace with hash 421066253, now seen corresponding path program 14 times [2023-09-01 12:30:39,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:30:39,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098374652] [2023-09-01 12:30:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:30:39,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:30:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:30:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:30:39,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:30:39,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098374652] [2023-09-01 12:30:39,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098374652] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:30:39,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867785441] [2023-09-01 12:30:39,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:30:39,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:30:39,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:30:39,803 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:30:39,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 12:30:39,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:30:39,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:30:39,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 12:30:39,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:30:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:39,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:30:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:39,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867785441] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:30:39,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:30:39,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-09-01 12:30:39,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467014298] [2023-09-01 12:30:39,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:30:39,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 12:30:39,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:30:39,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 12:30:39,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-09-01 12:30:40,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-09-01 12:30:40,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 1314 transitions, 30347 flow. Second operand has 17 states, 17 states have (on average 82.6470588235294) internal successors, (1405), 17 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:40,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:30:40,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-09-01 12:30:40,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:30:53,237 INFO L130 PetriNetUnfolder]: 20220/32024 cut-off events. [2023-09-01 12:30:53,237 INFO L131 PetriNetUnfolder]: For 1011905/1011905 co-relation queries the response was YES. [2023-09-01 12:30:53,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311955 conditions, 32024 events. 20220/32024 cut-off events. For 1011905/1011905 co-relation queries the response was YES. Maximal size of possible extension queue 1400. Compared 241242 event pairs, 1279 based on Foata normal form. 904/32928 useless extension candidates. Maximal degree in co-relation 310180. Up to 9943 conditions per place. [2023-09-01 12:30:53,669 INFO L137 encePairwiseOnDemand]: 172/181 looper letters, 1617 selfloop transitions, 1264 changer transitions 50/2931 dead transitions. [2023-09-01 12:30:53,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 2931 transitions, 72409 flow [2023-09-01 12:30:53,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-09-01 12:30:53,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2023-09-01 12:30:53,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 9314 transitions. [2023-09-01 12:30:53,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4809211545412299 [2023-09-01 12:30:53,682 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 9314 transitions. [2023-09-01 12:30:53,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 9314 transitions. [2023-09-01 12:30:53,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:30:53,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 9314 transitions. [2023-09-01 12:30:53,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 108 states, 107 states have (on average 87.04672897196262) internal successors, (9314), 107 states have internal predecessors, (9314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:53,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 108 states, 108 states have (on average 181.0) internal successors, (19548), 108 states have internal predecessors, (19548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:53,714 INFO L81 ComplementDD]: Finished complementDD. Result has 108 states, 108 states have (on average 181.0) internal successors, (19548), 108 states have internal predecessors, (19548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:53,714 INFO L175 Difference]: Start difference. First operand has 301 places, 1314 transitions, 30347 flow. Second operand 107 states and 9314 transitions. [2023-09-01 12:30:53,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 2931 transitions, 72409 flow [2023-09-01 12:31:01,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 2931 transitions, 69443 flow, removed 955 selfloop flow, removed 8 redundant places. [2023-09-01 12:31:01,807 INFO L231 Difference]: Finished difference. Result has 457 places, 1751 transitions, 45382 flow [2023-09-01 12:31:01,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=28313, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=832, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=45382, PETRI_PLACES=457, PETRI_TRANSITIONS=1751} [2023-09-01 12:31:01,808 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 428 predicate places. [2023-09-01 12:31:01,809 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1751 transitions, 45382 flow [2023-09-01 12:31:01,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 82.6470588235294) internal successors, (1405), 17 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:31:01,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:31:01,809 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:31:01,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-09-01 12:31:02,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:31:02,014 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:31:02,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:31:02,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1130474012, now seen corresponding path program 15 times [2023-09-01 12:31:02,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:31:02,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158866164] [2023-09-01 12:31:02,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:31:02,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:31:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:31:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:31:02,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:31:02,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158866164] [2023-09-01 12:31:02,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158866164] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:31:02,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121293234] [2023-09-01 12:31:02,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:31:02,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:31:02,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:31:02,088 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:31:02,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 12:31:02,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:31:02,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:31:02,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 12:31:02,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:31:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:31:02,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:31:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:31:02,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121293234] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:31:02,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:31:02,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-09-01 12:31:02,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162619646] [2023-09-01 12:31:02,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:31:02,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 12:31:02,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:31:02,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 12:31:02,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-09-01 12:31:02,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-09-01 12:31:02,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1751 transitions, 45382 flow. Second operand has 14 states, 14 states have (on average 83.35714285714286) internal successors, (1167), 14 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:31:02,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:31:02,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-09-01 12:31:02,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:31:20,159 INFO L130 PetriNetUnfolder]: 22490/35283 cut-off events. [2023-09-01 12:31:20,159 INFO L131 PetriNetUnfolder]: For 1898312/1898312 co-relation queries the response was YES. [2023-09-01 12:31:21,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413375 conditions, 35283 events. 22490/35283 cut-off events. For 1898312/1898312 co-relation queries the response was YES. Maximal size of possible extension queue 1597. Compared 264287 event pairs, 4018 based on Foata normal form. 448/35731 useless extension candidates. Maximal degree in co-relation 411626. Up to 12065 conditions per place. [2023-09-01 12:31:21,748 INFO L137 encePairwiseOnDemand]: 173/181 looper letters, 1269 selfloop transitions, 1128 changer transitions 10/2407 dead transitions. [2023-09-01 12:31:21,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 2407 transitions, 68462 flow [2023-09-01 12:31:21,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 12:31:21,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 12:31:21,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2178 transitions. [2023-09-01 12:31:21,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013812154696132 [2023-09-01 12:31:21,751 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2178 transitions. [2023-09-01 12:31:21,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2178 transitions. [2023-09-01 12:31:21,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:31:21,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2178 transitions. [2023-09-01 12:31:21,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 90.75) internal successors, (2178), 24 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:31:21,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 181.0) internal successors, (4525), 25 states have internal predecessors, (4525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:31:21,756 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 181.0) internal successors, (4525), 25 states have internal predecessors, (4525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:31:21,756 INFO L175 Difference]: Start difference. First operand has 457 places, 1751 transitions, 45382 flow. Second operand 24 states and 2178 transitions. [2023-09-01 12:31:21,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 2407 transitions, 68462 flow [2023-09-01 12:31:40,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 2407 transitions, 58728 flow, removed 4124 selfloop flow, removed 16 redundant places. [2023-09-01 12:31:41,021 INFO L231 Difference]: Finished difference. Result has 477 places, 1949 transitions, 47880 flow [2023-09-01 12:31:41,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=38967, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=935, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=757, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=47880, PETRI_PLACES=477, PETRI_TRANSITIONS=1949} [2023-09-01 12:31:41,041 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 448 predicate places. [2023-09-01 12:31:41,041 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 1949 transitions, 47880 flow [2023-09-01 12:31:41,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 83.35714285714286) internal successors, (1167), 14 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:31:41,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:31:41,041 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:31:41,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 12:31:41,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-09-01 12:31:41,246 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:31:41,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:31:41,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1061750104, now seen corresponding path program 16 times [2023-09-01 12:31:41,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:31:41,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101516871] [2023-09-01 12:31:41,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:31:41,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:31:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:31:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:31:41,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:31:41,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101516871] [2023-09-01 12:31:41,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101516871] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:31:41,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130890869] [2023-09-01 12:31:41,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:31:41,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:31:41,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:31:41,346 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:31:41,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 12:31:41,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:31:41,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:31:41,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 12:31:41,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:31:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:31:41,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:31:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:31:41,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130890869] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:31:41,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:31:41,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-09-01 12:31:41,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989400553] [2023-09-01 12:31:41,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:31:41,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 12:31:41,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:31:41,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 12:31:41,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-09-01 12:31:41,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-09-01 12:31:41,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 1949 transitions, 47880 flow. Second operand has 15 states, 15 states have (on average 85.4) internal successors, (1281), 15 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:31:41,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:31:41,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-09-01 12:31:41,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:32:03,735 INFO L130 PetriNetUnfolder]: 27906/43562 cut-off events. [2023-09-01 12:32:03,735 INFO L131 PetriNetUnfolder]: For 2834220/2835265 co-relation queries the response was YES. [2023-09-01 12:32:05,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505351 conditions, 43562 events. 27906/43562 cut-off events. For 2834220/2835265 co-relation queries the response was YES. Maximal size of possible extension queue 2022. Compared 334716 event pairs, 4339 based on Foata normal form. 871/44253 useless extension candidates. Maximal degree in co-relation 502266. Up to 15937 conditions per place. [2023-09-01 12:32:05,252 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 1222 selfloop transitions, 1536 changer transitions 10/2793 dead transitions. [2023-09-01 12:32:05,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 2793 transitions, 73383 flow [2023-09-01 12:32:05,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 12:32:05,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 12:32:05,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1974 transitions. [2023-09-01 12:32:05,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193370165745856 [2023-09-01 12:32:05,256 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1974 transitions. [2023-09-01 12:32:05,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1974 transitions. [2023-09-01 12:32:05,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:32:05,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1974 transitions. [2023-09-01 12:32:05,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 94.0) internal successors, (1974), 21 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:32:05,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:32:05,280 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:32:05,280 INFO L175 Difference]: Start difference. First operand has 477 places, 1949 transitions, 47880 flow. Second operand 21 states and 1974 transitions. [2023-09-01 12:32:05,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 2793 transitions, 73383 flow [2023-09-01 12:32:29,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 2793 transitions, 70522 flow, removed 1040 selfloop flow, removed 2 redundant places. [2023-09-01 12:32:29,459 INFO L231 Difference]: Finished difference. Result has 501 places, 2275 transitions, 60052 flow [2023-09-01 12:32:29,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=45422, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1945, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=60052, PETRI_PLACES=501, PETRI_TRANSITIONS=2275} [2023-09-01 12:32:29,472 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 472 predicate places. [2023-09-01 12:32:29,472 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 2275 transitions, 60052 flow [2023-09-01 12:32:29,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 85.4) internal successors, (1281), 15 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:32:29,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:32:29,472 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:32:29,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 12:32:29,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-09-01 12:32:29,673 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:32:29,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:32:29,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1702446798, now seen corresponding path program 17 times [2023-09-01 12:32:29,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:32:29,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988898332] [2023-09-01 12:32:29,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:32:29,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:32:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:32:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:32:29,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:32:29,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988898332] [2023-09-01 12:32:29,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988898332] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:32:29,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211115568] [2023-09-01 12:32:29,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:32:29,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:32:29,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:32:29,805 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:32:29,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 12:32:29,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 12:32:29,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:32:29,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 12:32:29,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:32:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:32:29,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:32:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:32:29,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211115568] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:32:29,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:32:29,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-09-01 12:32:29,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878934214] [2023-09-01 12:32:29,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:32:29,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 12:32:29,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:32:29,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 12:32:29,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-09-01 12:32:30,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-09-01 12:32:30,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 2275 transitions, 60052 flow. Second operand has 14 states, 14 states have (on average 86.42857142857143) internal successors, (1210), 14 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:32:30,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:32:30,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-09-01 12:32:30,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:33:04,059 INFO L130 PetriNetUnfolder]: 36739/58795 cut-off events. [2023-09-01 12:33:04,060 INFO L131 PetriNetUnfolder]: For 3812895/3814653 co-relation queries the response was YES. [2023-09-01 12:33:06,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684475 conditions, 58795 events. 36739/58795 cut-off events. For 3812895/3814653 co-relation queries the response was YES. Maximal size of possible extension queue 2778. Compared 492327 event pairs, 7925 based on Foata normal form. 1620/60211 useless extension candidates. Maximal degree in co-relation 682787. Up to 25301 conditions per place. [2023-09-01 12:33:06,651 INFO L137 encePairwiseOnDemand]: 174/181 looper letters, 2409 selfloop transitions, 1221 changer transitions 83/3738 dead transitions. [2023-09-01 12:33:06,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 3738 transitions, 99381 flow [2023-09-01 12:33:06,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 12:33:06,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 12:33:06,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2160 transitions. [2023-09-01 12:33:06,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188565938025462 [2023-09-01 12:33:06,653 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2160 transitions. [2023-09-01 12:33:06,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2160 transitions. [2023-09-01 12:33:06,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:33:06,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2160 transitions. [2023-09-01 12:33:06,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 93.91304347826087) internal successors, (2160), 23 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:33:06,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 181.0) internal successors, (4344), 24 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:33:06,657 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 181.0) internal successors, (4344), 24 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:33:06,658 INFO L175 Difference]: Start difference. First operand has 501 places, 2275 transitions, 60052 flow. Second operand 23 states and 2160 transitions. [2023-09-01 12:33:06,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 3738 transitions, 99381 flow [2023-09-01 12:33:47,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 3738 transitions, 95826 flow, removed 773 selfloop flow, removed 6 redundant places. [2023-09-01 12:33:47,649 INFO L231 Difference]: Finished difference. Result has 531 places, 2844 transitions, 77170 flow [2023-09-01 12:33:47,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=57051, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=772, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=77170, PETRI_PLACES=531, PETRI_TRANSITIONS=2844} [2023-09-01 12:33:47,651 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 502 predicate places. [2023-09-01 12:33:47,651 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 2844 transitions, 77170 flow [2023-09-01 12:33:47,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 86.42857142857143) internal successors, (1210), 14 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:33:47,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:33:47,651 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:33:47,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-09-01 12:33:47,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-09-01 12:33:47,855 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:33:47,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:33:47,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1866322504, now seen corresponding path program 18 times [2023-09-01 12:33:47,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:33:47,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332025793] [2023-09-01 12:33:47,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:33:47,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:33:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:33:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:33:47,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:33:47,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332025793] [2023-09-01 12:33:47,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332025793] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:33:47,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857893224] [2023-09-01 12:33:47,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:33:47,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:33:47,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:33:47,928 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:33:47,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 12:33:48,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 12:33:48,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:33:48,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 12:33:48,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:33:48,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:33:48,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:33:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:33:48,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857893224] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:33:48,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:33:48,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-09-01 12:33:48,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936933032] [2023-09-01 12:33:48,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:33:48,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 12:33:48,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:33:48,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 12:33:48,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-09-01 12:33:48,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-09-01 12:33:48,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 2844 transitions, 77170 flow. Second operand has 15 states, 15 states have (on average 85.8) internal successors, (1287), 15 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:33:48,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:33:48,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-09-01 12:33:48,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:34:55,586 INFO L130 PetriNetUnfolder]: 56508/91382 cut-off events. [2023-09-01 12:34:55,586 INFO L131 PetriNetUnfolder]: For 6643618/6644083 co-relation queries the response was YES. [2023-09-01 12:35:00,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1128416 conditions, 91382 events. 56508/91382 cut-off events. For 6643618/6644083 co-relation queries the response was YES. Maximal size of possible extension queue 4375. Compared 818134 event pairs, 8552 based on Foata normal form. 2337/93600 useless extension candidates. Maximal degree in co-relation 1126717. Up to 31473 conditions per place. [2023-09-01 12:35:00,680 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 2344 selfloop transitions, 1760 changer transitions 15/4172 dead transitions. [2023-09-01 12:35:00,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 4172 transitions, 124408 flow [2023-09-01 12:35:00,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 12:35:00,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 12:35:00,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1974 transitions. [2023-09-01 12:35:00,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193370165745856 [2023-09-01 12:35:00,683 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1974 transitions. [2023-09-01 12:35:00,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1974 transitions. [2023-09-01 12:35:00,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:35:00,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1974 transitions. [2023-09-01 12:35:00,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 94.0) internal successors, (1974), 21 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:35:00,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:35:00,687 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:35:00,687 INFO L175 Difference]: Start difference. First operand has 531 places, 2844 transitions, 77170 flow. Second operand 21 states and 1974 transitions. [2023-09-01 12:35:00,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 4172 transitions, 124408 flow [2023-09-01 12:37:04,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 4172 transitions, 119034 flow, removed 2361 selfloop flow, removed 4 redundant places. [2023-09-01 12:37:04,614 INFO L231 Difference]: Finished difference. Result has 555 places, 3245 transitions, 90846 flow [2023-09-01 12:37:04,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=74906, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=90846, PETRI_PLACES=555, PETRI_TRANSITIONS=3245} [2023-09-01 12:37:04,617 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 526 predicate places. [2023-09-01 12:37:04,617 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 3245 transitions, 90846 flow [2023-09-01 12:37:04,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 85.8) internal successors, (1287), 15 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:37:04,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:37:04,617 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:37:04,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-09-01 12:37:04,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 12:37:04,819 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:37:04,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:37:04,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1400967236, now seen corresponding path program 19 times [2023-09-01 12:37:04,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:37:04,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556486535] [2023-09-01 12:37:04,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:37:04,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:37:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:37:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:37:04,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:37:04,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556486535] [2023-09-01 12:37:04,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556486535] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:37:04,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991895389] [2023-09-01 12:37:04,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:37:04,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:37:04,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:37:04,950 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:37:04,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 12:37:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:37:05,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 12:37:05,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:37:05,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:37:05,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:37:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:37:05,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991895389] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:37:05,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:37:05,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-09-01 12:37:05,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534599112] [2023-09-01 12:37:05,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:37:05,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 12:37:05,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:37:05,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 12:37:05,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-09-01 12:37:05,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-09-01 12:37:05,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 3245 transitions, 90846 flow. Second operand has 16 states, 16 states have (on average 82.5625) internal successors, (1321), 16 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:37:05,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:37:05,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-09-01 12:37:05,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:38:39,674 INFO L130 PetriNetUnfolder]: 70083/114413 cut-off events. [2023-09-01 12:38:39,675 INFO L131 PetriNetUnfolder]: For 9409478/9409478 co-relation queries the response was YES. [2023-09-01 12:38:45,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464709 conditions, 114413 events. 70083/114413 cut-off events. For 9409478/9409478 co-relation queries the response was YES. Maximal size of possible extension queue 5612. Compared 1078895 event pairs, 6761 based on Foata normal form. 814/115227 useless extension candidates. Maximal degree in co-relation 1462812. Up to 40233 conditions per place. [2023-09-01 12:38:46,407 INFO L137 encePairwiseOnDemand]: 172/181 looper letters, 2983 selfloop transitions, 2617 changer transitions 54/5654 dead transitions. [2023-09-01 12:38:46,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 5654 transitions, 168291 flow [2023-09-01 12:38:46,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-09-01 12:38:46,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-09-01 12:38:46,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3460 transitions. [2023-09-01 12:38:46,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49015441280634653 [2023-09-01 12:38:46,432 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3460 transitions. [2023-09-01 12:38:46,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3460 transitions. [2023-09-01 12:38:46,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:38:46,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3460 transitions. [2023-09-01 12:38:46,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 88.71794871794872) internal successors, (3460), 39 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:38:46,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 181.0) internal successors, (7240), 40 states have internal predecessors, (7240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:38:46,439 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 181.0) internal successors, (7240), 40 states have internal predecessors, (7240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:38:46,439 INFO L175 Difference]: Start difference. First operand has 555 places, 3245 transitions, 90846 flow. Second operand 39 states and 3460 transitions. [2023-09-01 12:38:46,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 5654 transitions, 168291 flow [2023-09-01 12:41:56,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 5654 transitions, 163781 flow, removed 1315 selfloop flow, removed 4 redundant places. [2023-09-01 12:41:56,396 INFO L231 Difference]: Finished difference. Result has 610 places, 4265 transitions, 130156 flow [2023-09-01 12:41:56,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=88148, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1738, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=130156, PETRI_PLACES=610, PETRI_TRANSITIONS=4265} [2023-09-01 12:41:56,399 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 581 predicate places. [2023-09-01 12:41:56,399 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 4265 transitions, 130156 flow [2023-09-01 12:41:56,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.5625) internal successors, (1321), 16 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:41:56,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:41:56,400 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:41:56,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 12:41:56,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:41:56,605 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:41:56,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:41:56,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1116183444, now seen corresponding path program 20 times [2023-09-01 12:41:56,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:41:56,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317453609] [2023-09-01 12:41:56,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:41:56,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:41:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:41:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:41:56,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:41:56,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317453609] [2023-09-01 12:41:56,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317453609] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:41:56,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388347263] [2023-09-01 12:41:56,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:41:56,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:41:56,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:41:56,679 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:41:56,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 12:41:56,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:41:56,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:41:56,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 12:41:56,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:41:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:41:56,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:41:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:41:56,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388347263] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:41:56,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:41:56,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-09-01 12:41:56,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925519476] [2023-09-01 12:41:56,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:41:56,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 12:41:56,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:41:56,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 12:41:56,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-09-01 12:41:56,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-09-01 12:41:56,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 4265 transitions, 130156 flow. Second operand has 15 states, 15 states have (on average 85.26666666666667) internal successors, (1279), 15 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:41:56,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:41:56,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-09-01 12:41:56,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15