./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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/popl20-difference-det.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 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 20:15:07,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 20:15:07,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 20:15:07,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 20:15:07,927 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 20:15:07,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 20:15:07,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 20:15:07,930 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 20:15:07,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 20:15:07,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 20:15:07,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 20:15:07,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 20:15:07,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 20:15:07,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 20:15:07,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 20:15:07,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 20:15:07,936 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 20:15:07,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 20:15:07,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 20:15:07,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 20:15:07,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 20:15:07,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 20:15:07,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 20:15:07,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 20:15:07,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 20:15:07,945 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 20:15:07,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 20:15:07,946 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 20:15:07,946 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 20:15:07,947 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 20:15:07,947 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 20:15:07,947 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 20:15:07,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 20:15:07,948 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 20:15:07,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 20:15:07,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 20:15:07,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 20:15:07,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 20:15:07,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 20:15:07,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 20:15:07,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 20:15:07,959 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 20:15:07,985 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 20:15:07,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 20:15:07,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 20:15:07,986 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 20:15:07,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 20:15:07,987 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 20:15:07,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 20:15:07,988 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 20:15:07,988 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 20:15:07,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 20:15:07,989 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 20:15:07,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 20:15:07,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 20:15:07,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 20:15:07,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 20:15:07,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 20:15:07,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 20:15:07,990 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 20:15:07,990 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 20:15:07,991 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 20:15:07,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 20:15:07,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 20:15:07,991 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 20:15:07,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 20:15:07,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:15:07,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 20:15:07,992 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 20:15:07,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 20:15:07,992 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 20:15:07,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 20:15:07,992 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 20:15:07,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 20:15:07,993 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 20:15:07,993 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 20:15:07,993 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 20:15:07,993 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 20:15:08,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 20:15:08,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 20:15:08,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 20:15:08,226 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 20:15:08,226 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 20:15:08,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-08-30 20:15:09,252 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 20:15:09,360 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 20:15:09,360 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-08-30 20:15:09,364 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0525f33f7/3f74bd42f1b34097b6c65b845069b2fc/FLAG74ec2427b [2023-08-30 20:15:09,374 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0525f33f7/3f74bd42f1b34097b6c65b845069b2fc [2023-08-30 20:15:09,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 20:15:09,377 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 20:15:09,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 20:15:09,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 20:15:09,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 20:15:09,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:15:09" (1/1) ... [2023-08-30 20:15:09,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@98da2b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:15:09, skipping insertion in model container [2023-08-30 20:15:09,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:15:09" (1/1) ... [2023-08-30 20:15:09,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 20:15:09,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 20:15:09,484 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c[2507,2520] [2023-08-30 20:15:09,487 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:15:09,493 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 20:15:09,523 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c[2507,2520] [2023-08-30 20:15:09,524 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:15:09,529 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:15:09,529 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:15:09,533 INFO L208 MainTranslator]: Completed translation [2023-08-30 20:15:09,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:15:09 WrapperNode [2023-08-30 20:15:09,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 20:15:09,535 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 20:15:09,535 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 20:15:09,535 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 20:15:09,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:15:09" (1/1) ... [2023-08-30 20:15:09,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:15:09" (1/1) ... [2023-08-30 20:15:09,556 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 122 [2023-08-30 20:15:09,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 20:15:09,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 20:15:09,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 20:15:09,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 20:15:09,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:15:09" (1/1) ... [2023-08-30 20:15:09,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:15:09" (1/1) ... [2023-08-30 20:15:09,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:15:09" (1/1) ... [2023-08-30 20:15:09,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:15:09" (1/1) ... [2023-08-30 20:15:09,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:15:09" (1/1) ... [2023-08-30 20:15:09,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:15:09" (1/1) ... [2023-08-30 20:15:09,570 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:15:09" (1/1) ... [2023-08-30 20:15:09,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:15:09" (1/1) ... [2023-08-30 20:15:09,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 20:15:09,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 20:15:09,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 20:15:09,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 20:15:09,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:15:09" (1/1) ... [2023-08-30 20:15:09,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:15:09,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:09,591 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 20:15:09,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 20:15:09,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 20:15:09,668 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 20:15:09,668 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 20:15:09,669 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 20:15:09,669 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 20:15:09,669 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 20:15:09,669 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 20:15:09,670 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 20:15:09,670 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 20:15:09,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 20:15:09,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 20:15:09,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 20:15:09,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 20:15:09,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 20:15:09,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 20:15:09,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 20:15:09,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 20:15:09,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 20:15:09,672 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 20:15:09,800 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 20:15:09,801 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 20:15:10,039 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 20:15:10,076 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 20:15:10,076 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 20:15:10,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:15:10 BoogieIcfgContainer [2023-08-30 20:15:10,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 20:15:10,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 20:15:10,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 20:15:10,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 20:15:10,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 08:15:09" (1/3) ... [2023-08-30 20:15:10,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379cbe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:15:10, skipping insertion in model container [2023-08-30 20:15:10,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:15:09" (2/3) ... [2023-08-30 20:15:10,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379cbe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:15:10, skipping insertion in model container [2023-08-30 20:15:10,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:15:10" (3/3) ... [2023-08-30 20:15:10,082 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2023-08-30 20:15:10,097 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 20:15:10,103 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 20:15:10,104 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 20:15:10,104 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 20:15:10,157 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 20:15:10,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 125 transitions, 282 flow [2023-08-30 20:15:10,249 INFO L130 PetriNetUnfolder]: 9/121 cut-off events. [2023-08-30 20:15:10,250 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 20:15:10,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 121 events. 9/121 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 93 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-08-30 20:15:10,255 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 125 transitions, 282 flow [2023-08-30 20:15:10,258 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 109 transitions, 242 flow [2023-08-30 20:15:10,261 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 20:15:10,275 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 109 transitions, 242 flow [2023-08-30 20:15:10,278 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 109 transitions, 242 flow [2023-08-30 20:15:10,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 109 transitions, 242 flow [2023-08-30 20:15:10,310 INFO L130 PetriNetUnfolder]: 9/109 cut-off events. [2023-08-30 20:15:10,311 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 20:15:10,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 109 events. 9/109 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 94 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-08-30 20:15:10,314 INFO L119 LiptonReduction]: Number of co-enabled transitions 2520 [2023-08-30 20:15:12,995 INFO L134 LiptonReduction]: Checked pairs total: 2650 [2023-08-30 20:15:12,995 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-08-30 20:15:13,005 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 20:15:13,014 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;@1972dd8a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 20:15:13,014 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 20:15:13,027 INFO L130 PetriNetUnfolder]: 4/28 cut-off events. [2023-08-30 20:15:13,028 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 20:15:13,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:13,028 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, 1, 1, 1] [2023-08-30 20:15:13,029 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 2 more)] === [2023-08-30 20:15:13,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:13,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2017117140, now seen corresponding path program 1 times [2023-08-30 20:15:13,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:13,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320618645] [2023-08-30 20:15:13,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:13,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:13,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:13,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:13,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320618645] [2023-08-30 20:15:13,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320618645] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:15:13,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:15:13,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 20:15:13,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703739633] [2023-08-30 20:15:13,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:15:13,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:15:13,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:13,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:15:13,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:15:13,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 212 [2023-08-30 20:15:13,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:13,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:13,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 212 [2023-08-30 20:15:13,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:13,595 INFO L130 PetriNetUnfolder]: 1537/1954 cut-off events. [2023-08-30 20:15:13,596 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2023-08-30 20:15:13,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4056 conditions, 1954 events. 1537/1954 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6416 event pairs, 141 based on Foata normal form. 1/1135 useless extension candidates. Maximal degree in co-relation 3091. Up to 1733 conditions per place. [2023-08-30 20:15:13,646 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 41 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2023-08-30 20:15:13,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 241 flow [2023-08-30 20:15:13,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:15:13,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:15:13,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-08-30 20:15:13,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707547169811321 [2023-08-30 20:15:13,682 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-08-30 20:15:13,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-08-30 20:15:13,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:13,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-08-30 20:15:13,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:13,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 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) [2023-08-30 20:15:13,710 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 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) [2023-08-30 20:15:13,711 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 82 flow. Second operand 3 states and 363 transitions. [2023-08-30 20:15:13,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 241 flow [2023-08-30 20:15:13,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 51 transitions, 211 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 20:15:13,717 INFO L231 Difference]: Finished difference. Result has 33 places, 33 transitions, 99 flow [2023-08-30 20:15:13,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=33, PETRI_TRANSITIONS=33} [2023-08-30 20:15:13,732 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-08-30 20:15:13,733 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 33 transitions, 99 flow [2023-08-30 20:15:13,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:13,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:13,735 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, 1, 1, 1, 1] [2023-08-30 20:15:13,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 20:15:13,736 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 2 more)] === [2023-08-30 20:15:13,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:13,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1386775174, now seen corresponding path program 1 times [2023-08-30 20:15:13,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:13,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315162540] [2023-08-30 20:15:13,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:13,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:13,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:13,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315162540] [2023-08-30 20:15:13,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315162540] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:15:13,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:15:13,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:15:13,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575649467] [2023-08-30 20:15:13,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:15:13,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:15:13,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:13,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:15:13,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:15:13,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 212 [2023-08-30 20:15:13,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 33 transitions, 99 flow. Second operand has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:13,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:13,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 212 [2023-08-30 20:15:13,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:14,230 INFO L130 PetriNetUnfolder]: 2495/3283 cut-off events. [2023-08-30 20:15:14,230 INFO L131 PetriNetUnfolder]: For 972/972 co-relation queries the response was YES. [2023-08-30 20:15:14,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8050 conditions, 3283 events. 2495/3283 cut-off events. For 972/972 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 13635 event pairs, 520 based on Foata normal form. 48/3311 useless extension candidates. Maximal degree in co-relation 2873. Up to 1616 conditions per place. [2023-08-30 20:15:14,241 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 84 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2023-08-30 20:15:14,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 91 transitions, 452 flow [2023-08-30 20:15:14,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:15:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:15:14,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 573 transitions. [2023-08-30 20:15:14,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5405660377358491 [2023-08-30 20:15:14,244 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 573 transitions. [2023-08-30 20:15:14,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 573 transitions. [2023-08-30 20:15:14,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:14,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 573 transitions. [2023-08-30 20:15:14,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:14,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:14,247 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:14,248 INFO L175 Difference]: Start difference. First operand has 33 places, 33 transitions, 99 flow. Second operand 5 states and 573 transitions. [2023-08-30 20:15:14,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 91 transitions, 452 flow [2023-08-30 20:15:14,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 91 transitions, 439 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 20:15:14,250 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 129 flow [2023-08-30 20:15:14,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-08-30 20:15:14,250 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-08-30 20:15:14,251 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 129 flow [2023-08-30 20:15:14,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:14,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:14,251 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, 1, 1, 1, 1] [2023-08-30 20:15:14,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 20:15:14,251 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 2 more)] === [2023-08-30 20:15:14,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:14,252 INFO L85 PathProgramCache]: Analyzing trace with hash -418684095, now seen corresponding path program 1 times [2023-08-30 20:15:14,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:14,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446821160] [2023-08-30 20:15:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:14,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:14,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:14,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:14,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446821160] [2023-08-30 20:15:14,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446821160] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:14,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231077610] [2023-08-30 20:15:14,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:14,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:14,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:14,305 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:14,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 20:15:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:14,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 20:15:14,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:14,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:14,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:14,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231077610] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:14,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:14,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 20:15:14,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873866967] [2023-08-30 20:15:14,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:14,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 20:15:14,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:14,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 20:15:14,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 20:15:14,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-30 20:15:14,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 129 flow. Second operand has 8 states, 8 states have (on average 100.75) internal successors, (806), 8 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:14,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:14,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-30 20:15:14,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:14,998 INFO L130 PetriNetUnfolder]: 3361/4509 cut-off events. [2023-08-30 20:15:14,999 INFO L131 PetriNetUnfolder]: For 3715/4180 co-relation queries the response was YES. [2023-08-30 20:15:15,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12634 conditions, 4509 events. 3361/4509 cut-off events. For 3715/4180 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 20174 event pairs, 707 based on Foata normal form. 570/5006 useless extension candidates. Maximal degree in co-relation 8079. Up to 1944 conditions per place. [2023-08-30 20:15:15,047 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 89 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-08-30 20:15:15,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 97 transitions, 532 flow [2023-08-30 20:15:15,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:15:15,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:15:15,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 565 transitions. [2023-08-30 20:15:15,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330188679245284 [2023-08-30 20:15:15,050 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 565 transitions. [2023-08-30 20:15:15,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 565 transitions. [2023-08-30 20:15:15,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:15,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 565 transitions. [2023-08-30 20:15:15,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.0) internal successors, (565), 5 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:15,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:15,053 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:15,053 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 129 flow. Second operand 5 states and 565 transitions. [2023-08-30 20:15:15,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 97 transitions, 532 flow [2023-08-30 20:15:15,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 97 transitions, 513 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 20:15:15,060 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 159 flow [2023-08-30 20:15:15,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-08-30 20:15:15,061 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2023-08-30 20:15:15,061 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 159 flow [2023-08-30 20:15:15,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 100.75) internal successors, (806), 8 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:15,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:15,062 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, 1, 1, 1, 1] [2023-08-30 20:15:15,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 20:15:15,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:15,267 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 2 more)] === [2023-08-30 20:15:15,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:15,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1510344313, now seen corresponding path program 1 times [2023-08-30 20:15:15,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:15,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241058175] [2023-08-30 20:15:15,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:15,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:15,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:15,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241058175] [2023-08-30 20:15:15,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241058175] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:15,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347971929] [2023-08-30 20:15:15,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:15,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:15,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:15,371 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:15,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 20:15:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:15,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 20:15:15,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:15,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:15,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:15,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347971929] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:15,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:15,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 20:15:15,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570428526] [2023-08-30 20:15:15,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:15,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 20:15:15,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:15,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 20:15:15,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 20:15:15,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-30 20:15:15,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 159 flow. Second operand has 8 states, 8 states have (on average 101.625) internal successors, (813), 8 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:15,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:15,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-30 20:15:15,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:15,919 INFO L130 PetriNetUnfolder]: 3413/4567 cut-off events. [2023-08-30 20:15:15,920 INFO L131 PetriNetUnfolder]: For 5980/6404 co-relation queries the response was YES. [2023-08-30 20:15:15,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14384 conditions, 4567 events. 3413/4567 cut-off events. For 5980/6404 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20233 event pairs, 479 based on Foata normal form. 512/5013 useless extension candidates. Maximal degree in co-relation 11186. Up to 2034 conditions per place. [2023-08-30 20:15:15,946 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 88 selfloop transitions, 5 changer transitions 0/96 dead transitions. [2023-08-30 20:15:15,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 96 transitions, 573 flow [2023-08-30 20:15:15,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:15:15,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:15:15,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 563 transitions. [2023-08-30 20:15:15,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311320754716982 [2023-08-30 20:15:15,948 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 563 transitions. [2023-08-30 20:15:15,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 563 transitions. [2023-08-30 20:15:15,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:15,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 563 transitions. [2023-08-30 20:15:15,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.6) internal successors, (563), 5 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) [2023-08-30 20:15:15,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:15,952 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:15,953 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 159 flow. Second operand 5 states and 563 transitions. [2023-08-30 20:15:15,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 96 transitions, 573 flow [2023-08-30 20:15:15,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 96 transitions, 564 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 20:15:15,964 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 188 flow [2023-08-30 20:15:15,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2023-08-30 20:15:15,965 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2023-08-30 20:15:15,965 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 188 flow [2023-08-30 20:15:15,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 101.625) internal successors, (813), 8 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:15,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:15,966 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, 1, 1, 1, 1] [2023-08-30 20:15:15,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 20:15:16,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-30 20:15:16,174 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 2 more)] === [2023-08-30 20:15:16,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:16,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1953734941, now seen corresponding path program 2 times [2023-08-30 20:15:16,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:16,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886874845] [2023-08-30 20:15:16,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:16,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:16,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:16,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886874845] [2023-08-30 20:15:16,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886874845] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:16,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630565074] [2023-08-30 20:15:16,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:15:16,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:16,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:16,289 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:16,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 20:15:16,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:15:16,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:16,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 20:15:16,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:16,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:16,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630565074] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:16,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:16,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 20:15:16,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961770249] [2023-08-30 20:15:16,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:16,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 20:15:16,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:16,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 20:15:16,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 20:15:16,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-30 20:15:16,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 188 flow. Second operand has 10 states, 10 states have (on average 101.7) internal successors, (1017), 10 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:16,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:16,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-30 20:15:16,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:17,019 INFO L130 PetriNetUnfolder]: 5065/6869 cut-off events. [2023-08-30 20:15:17,020 INFO L131 PetriNetUnfolder]: For 13799/14765 co-relation queries the response was YES. [2023-08-30 20:15:17,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23179 conditions, 6869 events. 5065/6869 cut-off events. For 13799/14765 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 33838 event pairs, 649 based on Foata normal form. 1068/7721 useless extension candidates. Maximal degree in co-relation 16109. Up to 2724 conditions per place. [2023-08-30 20:15:17,060 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 149 selfloop transitions, 13 changer transitions 0/166 dead transitions. [2023-08-30 20:15:17,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 166 transitions, 1054 flow [2023-08-30 20:15:17,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:15:17,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:15:17,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 907 transitions. [2023-08-30 20:15:17,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5347877358490566 [2023-08-30 20:15:17,062 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 907 transitions. [2023-08-30 20:15:17,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 907 transitions. [2023-08-30 20:15:17,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:17,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 907 transitions. [2023-08-30 20:15:17,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.375) internal successors, (907), 8 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:17,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 212.0) internal successors, (1908), 9 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:17,067 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 212.0) internal successors, (1908), 9 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:17,067 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 188 flow. Second operand 8 states and 907 transitions. [2023-08-30 20:15:17,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 166 transitions, 1054 flow [2023-08-30 20:15:17,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 166 transitions, 1012 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-08-30 20:15:17,086 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 281 flow [2023-08-30 20:15:17,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=281, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-08-30 20:15:17,088 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2023-08-30 20:15:17,088 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 281 flow [2023-08-30 20:15:17,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 101.7) internal successors, (1017), 10 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:17,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:17,089 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, 1, 1, 1, 1] [2023-08-30 20:15:17,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 20:15:17,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:17,295 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 2 more)] === [2023-08-30 20:15:17,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:17,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1707640579, now seen corresponding path program 2 times [2023-08-30 20:15:17,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:17,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297041241] [2023-08-30 20:15:17,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:17,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:17,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:17,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297041241] [2023-08-30 20:15:17,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297041241] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:17,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945889275] [2023-08-30 20:15:17,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:15:17,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:17,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:17,400 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:17,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 20:15:17,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:15:17,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:17,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 20:15:17,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:17,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:17,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:17,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945889275] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:17,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:17,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 20:15:17,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484216345] [2023-08-30 20:15:17,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:17,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 20:15:17,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:17,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 20:15:17,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 20:15:17,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-30 20:15:17,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 281 flow. Second operand has 10 states, 10 states have (on average 100.3) internal successors, (1003), 10 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:17,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:17,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-30 20:15:17,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:18,418 INFO L130 PetriNetUnfolder]: 8404/11264 cut-off events. [2023-08-30 20:15:18,418 INFO L131 PetriNetUnfolder]: For 34345/36956 co-relation queries the response was YES. [2023-08-30 20:15:18,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43194 conditions, 11264 events. 8404/11264 cut-off events. For 34345/36956 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 57068 event pairs, 736 based on Foata normal form. 951/11972 useless extension candidates. Maximal degree in co-relation 36360. Up to 4803 conditions per place. [2023-08-30 20:15:18,474 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 175 selfloop transitions, 14 changer transitions 0/193 dead transitions. [2023-08-30 20:15:18,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 193 transitions, 1524 flow [2023-08-30 20:15:18,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:15:18,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:15:18,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 901 transitions. [2023-08-30 20:15:18,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2023-08-30 20:15:18,476 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 901 transitions. [2023-08-30 20:15:18,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 901 transitions. [2023-08-30 20:15:18,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:18,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 901 transitions. [2023-08-30 20:15:18,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 112.625) internal successors, (901), 8 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:18,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 212.0) internal successors, (1908), 9 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:18,481 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 212.0) internal successors, (1908), 9 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:18,481 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 281 flow. Second operand 8 states and 901 transitions. [2023-08-30 20:15:18,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 193 transitions, 1524 flow [2023-08-30 20:15:18,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 193 transitions, 1424 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-08-30 20:15:18,524 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 370 flow [2023-08-30 20:15:18,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=370, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2023-08-30 20:15:18,525 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 28 predicate places. [2023-08-30 20:15:18,525 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 370 flow [2023-08-30 20:15:18,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 100.3) internal successors, (1003), 10 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:18,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:18,526 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, 1, 1, 1, 1] [2023-08-30 20:15:18,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 20:15:18,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:18,731 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 2 more)] === [2023-08-30 20:15:18,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:18,731 INFO L85 PathProgramCache]: Analyzing trace with hash 2076753269, now seen corresponding path program 3 times [2023-08-30 20:15:18,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:18,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452900913] [2023-08-30 20:15:18,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:18,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:18,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:18,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452900913] [2023-08-30 20:15:18,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452900913] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:18,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576184411] [2023-08-30 20:15:18,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:15:18,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:18,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:18,793 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:18,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 20:15:18,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:15:18,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:18,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 20:15:18,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:18,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:18,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:18,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576184411] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:18,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:18,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 20:15:18,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657109244] [2023-08-30 20:15:18,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:18,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 20:15:18,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:18,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 20:15:18,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 20:15:18,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-30 20:15:18,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 370 flow. Second operand has 10 states, 10 states have (on average 101.7) internal successors, (1017), 10 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:18,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:18,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-30 20:15:18,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:19,984 INFO L130 PetriNetUnfolder]: 10652/14308 cut-off events. [2023-08-30 20:15:19,984 INFO L131 PetriNetUnfolder]: For 57338/60554 co-relation queries the response was YES. [2023-08-30 20:15:20,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60004 conditions, 14308 events. 10652/14308 cut-off events. For 57338/60554 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 76201 event pairs, 2167 based on Foata normal form. 1607/15471 useless extension candidates. Maximal degree in co-relation 50602. Up to 6486 conditions per place. [2023-08-30 20:15:20,048 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 125 selfloop transitions, 16 changer transitions 0/146 dead transitions. [2023-08-30 20:15:20,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 146 transitions, 1196 flow [2023-08-30 20:15:20,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:15:20,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:15:20,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 570 transitions. [2023-08-30 20:15:20,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377358490566038 [2023-08-30 20:15:20,050 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 570 transitions. [2023-08-30 20:15:20,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 570 transitions. [2023-08-30 20:15:20,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:20,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 570 transitions. [2023-08-30 20:15:20,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:20,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:20,053 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:20,053 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 370 flow. Second operand 5 states and 570 transitions. [2023-08-30 20:15:20,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 146 transitions, 1196 flow [2023-08-30 20:15:20,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 146 transitions, 1146 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-30 20:15:20,127 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 473 flow [2023-08-30 20:15:20,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=473, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2023-08-30 20:15:20,128 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2023-08-30 20:15:20,129 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 473 flow [2023-08-30 20:15:20,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 101.7) internal successors, (1017), 10 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:20,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:20,132 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, 1, 1, 1, 1] [2023-08-30 20:15:20,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 20:15:20,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:20,337 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 2 more)] === [2023-08-30 20:15:20,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:20,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1065793488, now seen corresponding path program 1 times [2023-08-30 20:15:20,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:20,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987069164] [2023-08-30 20:15:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:20,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:20,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:20,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:20,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987069164] [2023-08-30 20:15:20,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987069164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:15:20,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:15:20,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:15:20,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905549376] [2023-08-30 20:15:20,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:15:20,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:15:20,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:20,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:15:20,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:15:20,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 212 [2023-08-30 20:15:20,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 473 flow. Second operand has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:20,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:20,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 212 [2023-08-30 20:15:20,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:21,473 INFO L130 PetriNetUnfolder]: 11094/14850 cut-off events. [2023-08-30 20:15:21,473 INFO L131 PetriNetUnfolder]: For 61372/64597 co-relation queries the response was YES. [2023-08-30 20:15:21,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65847 conditions, 14850 events. 11094/14850 cut-off events. For 61372/64597 co-relation queries the response was YES. Maximal size of possible extension queue 910. Compared 79472 event pairs, 971 based on Foata normal form. 1644/16054 useless extension candidates. Maximal degree in co-relation 56268. Up to 7770 conditions per place. [2023-08-30 20:15:21,593 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 115 selfloop transitions, 15 changer transitions 0/135 dead transitions. [2023-08-30 20:15:21,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 135 transitions, 1180 flow [2023-08-30 20:15:21,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:15:21,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:15:21,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 567 transitions. [2023-08-30 20:15:21,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349056603773585 [2023-08-30 20:15:21,595 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 567 transitions. [2023-08-30 20:15:21,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 567 transitions. [2023-08-30 20:15:21,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:21,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 567 transitions. [2023-08-30 20:15:21,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:21,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:21,599 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:21,599 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 473 flow. Second operand 5 states and 567 transitions. [2023-08-30 20:15:21,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 135 transitions, 1180 flow [2023-08-30 20:15:21,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 135 transitions, 1154 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-08-30 20:15:21,770 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 525 flow [2023-08-30 20:15:21,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=525, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2023-08-30 20:15:21,770 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 38 predicate places. [2023-08-30 20:15:21,771 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 525 flow [2023-08-30 20:15:21,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:21,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:21,771 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, 1, 1, 1, 1] [2023-08-30 20:15:21,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 20:15:21,771 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 2 more)] === [2023-08-30 20:15:21,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:21,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1179771516, now seen corresponding path program 2 times [2023-08-30 20:15:21,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:21,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235954488] [2023-08-30 20:15:21,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:21,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:21,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:21,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235954488] [2023-08-30 20:15:21,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235954488] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:15:21,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:15:21,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:15:21,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038612915] [2023-08-30 20:15:21,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:15:21,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:15:21,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:21,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:15:21,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:15:21,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-08-30 20:15:21,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 525 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:21,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:21,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-08-30 20:15:21,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:22,709 INFO L130 PetriNetUnfolder]: 9512/12930 cut-off events. [2023-08-30 20:15:22,709 INFO L131 PetriNetUnfolder]: For 70712/74116 co-relation queries the response was YES. [2023-08-30 20:15:22,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58319 conditions, 12930 events. 9512/12930 cut-off events. For 70712/74116 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 68496 event pairs, 2404 based on Foata normal form. 1498/14218 useless extension candidates. Maximal degree in co-relation 54145. Up to 7286 conditions per place. [2023-08-30 20:15:22,783 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 141 selfloop transitions, 11 changer transitions 0/158 dead transitions. [2023-08-30 20:15:22,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 158 transitions, 1568 flow [2023-08-30 20:15:22,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:15:22,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:15:22,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 571 transitions. [2023-08-30 20:15:22,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386792452830189 [2023-08-30 20:15:22,786 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 571 transitions. [2023-08-30 20:15:22,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 571 transitions. [2023-08-30 20:15:22,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:22,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 571 transitions. [2023-08-30 20:15:22,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.2) internal successors, (571), 5 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:22,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:22,789 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:22,789 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 525 flow. Second operand 5 states and 571 transitions. [2023-08-30 20:15:22,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 158 transitions, 1568 flow [2023-08-30 20:15:22,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 158 transitions, 1508 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-30 20:15:22,909 INFO L231 Difference]: Finished difference. Result has 79 places, 68 transitions, 547 flow [2023-08-30 20:15:22,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=547, PETRI_PLACES=79, PETRI_TRANSITIONS=68} [2023-08-30 20:15:22,910 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 41 predicate places. [2023-08-30 20:15:22,910 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 68 transitions, 547 flow [2023-08-30 20:15:22,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:22,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:22,910 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, 1, 1, 1, 1] [2023-08-30 20:15:22,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 20:15:22,911 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 2 more)] === [2023-08-30 20:15:22,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:22,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1826686174, now seen corresponding path program 2 times [2023-08-30 20:15:22,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:22,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357753366] [2023-08-30 20:15:22,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:22,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:22,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:22,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357753366] [2023-08-30 20:15:22,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357753366] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:15:22,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:15:22,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:15:22,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536511117] [2023-08-30 20:15:22,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:15:22,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:15:22,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:22,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:15:22,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:15:22,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 212 [2023-08-30 20:15:22,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 68 transitions, 547 flow. Second operand has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:22,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:22,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 212 [2023-08-30 20:15:22,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:23,993 INFO L130 PetriNetUnfolder]: 10846/14650 cut-off events. [2023-08-30 20:15:23,994 INFO L131 PetriNetUnfolder]: For 77876/81912 co-relation queries the response was YES. [2023-08-30 20:15:24,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68476 conditions, 14650 events. 10846/14650 cut-off events. For 77876/81912 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 80807 event pairs, 2073 based on Foata normal form. 1808/16120 useless extension candidates. Maximal degree in co-relation 58877. Up to 7788 conditions per place. [2023-08-30 20:15:24,067 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 145 selfloop transitions, 12 changer transitions 2/164 dead transitions. [2023-08-30 20:15:24,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 164 transitions, 1513 flow [2023-08-30 20:15:24,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:15:24,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:15:24,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 577 transitions. [2023-08-30 20:15:24,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5443396226415095 [2023-08-30 20:15:24,070 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 577 transitions. [2023-08-30 20:15:24,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 577 transitions. [2023-08-30 20:15:24,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:24,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 577 transitions. [2023-08-30 20:15:24,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.4) internal successors, (577), 5 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:24,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:24,074 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:24,074 INFO L175 Difference]: Start difference. First operand has 79 places, 68 transitions, 547 flow. Second operand 5 states and 577 transitions. [2023-08-30 20:15:24,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 164 transitions, 1513 flow [2023-08-30 20:15:24,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 164 transitions, 1427 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-08-30 20:15:24,236 INFO L231 Difference]: Finished difference. Result has 83 places, 70 transitions, 578 flow [2023-08-30 20:15:24,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=578, PETRI_PLACES=83, PETRI_TRANSITIONS=70} [2023-08-30 20:15:24,250 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2023-08-30 20:15:24,250 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 70 transitions, 578 flow [2023-08-30 20:15:24,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:24,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:24,251 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, 1, 1, 1, 1] [2023-08-30 20:15:24,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 20:15:24,251 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 2 more)] === [2023-08-30 20:15:24,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:24,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1678969827, now seen corresponding path program 3 times [2023-08-30 20:15:24,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:24,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893004773] [2023-08-30 20:15:24,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:24,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:24,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:24,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893004773] [2023-08-30 20:15:24,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893004773] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:24,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515272471] [2023-08-30 20:15:24,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:15:24,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:24,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:24,364 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:24,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 20:15:24,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:15:24,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:24,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 20:15:24,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:24,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:24,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515272471] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:24,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:24,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 20:15:24,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087601938] [2023-08-30 20:15:24,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:24,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 20:15:24,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:24,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 20:15:24,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 20:15:24,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-30 20:15:24,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 70 transitions, 578 flow. Second operand has 10 states, 10 states have (on average 100.7) internal successors, (1007), 10 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:24,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:24,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-30 20:15:24,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:25,708 INFO L130 PetriNetUnfolder]: 12722/17437 cut-off events. [2023-08-30 20:15:25,709 INFO L131 PetriNetUnfolder]: For 95235/100050 co-relation queries the response was YES. [2023-08-30 20:15:25,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82937 conditions, 17437 events. 12722/17437 cut-off events. For 95235/100050 co-relation queries the response was YES. Maximal size of possible extension queue 920. Compared 97111 event pairs, 3252 based on Foata normal form. 2507/19640 useless extension candidates. Maximal degree in co-relation 78353. Up to 8886 conditions per place. [2023-08-30 20:15:25,829 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 146 selfloop transitions, 17 changer transitions 0/170 dead transitions. [2023-08-30 20:15:25,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 170 transitions, 1757 flow [2023-08-30 20:15:25,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:15:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:15:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 564 transitions. [2023-08-30 20:15:25,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5320754716981132 [2023-08-30 20:15:25,831 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 564 transitions. [2023-08-30 20:15:25,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 564 transitions. [2023-08-30 20:15:25,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:25,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 564 transitions. [2023-08-30 20:15:25,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.8) internal successors, (564), 5 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:25,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:25,834 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:25,834 INFO L175 Difference]: Start difference. First operand has 83 places, 70 transitions, 578 flow. Second operand 5 states and 564 transitions. [2023-08-30 20:15:25,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 170 transitions, 1757 flow [2023-08-30 20:15:26,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 170 transitions, 1685 flow, removed 23 selfloop flow, removed 1 redundant places. [2023-08-30 20:15:26,003 INFO L231 Difference]: Finished difference. Result has 89 places, 77 transitions, 676 flow [2023-08-30 20:15:26,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=676, PETRI_PLACES=89, PETRI_TRANSITIONS=77} [2023-08-30 20:15:26,004 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 51 predicate places. [2023-08-30 20:15:26,004 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 77 transitions, 676 flow [2023-08-30 20:15:26,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 100.7) internal successors, (1007), 10 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:26,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:26,004 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, 1, 1, 1, 1] [2023-08-30 20:15:26,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 20:15:26,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:26,209 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 2 more)] === [2023-08-30 20:15:26,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:26,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1635530536, now seen corresponding path program 3 times [2023-08-30 20:15:26,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:26,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271563621] [2023-08-30 20:15:26,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:26,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:26,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:26,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271563621] [2023-08-30 20:15:26,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271563621] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:15:26,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:15:26,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:15:26,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586942537] [2023-08-30 20:15:26,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:15:26,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:15:26,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:26,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:15:26,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:15:26,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-08-30 20:15:26,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 77 transitions, 676 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:26,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:26,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-08-30 20:15:26,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:27,455 INFO L130 PetriNetUnfolder]: 11930/16332 cut-off events. [2023-08-30 20:15:27,456 INFO L131 PetriNetUnfolder]: For 107941/112532 co-relation queries the response was YES. [2023-08-30 20:15:27,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81495 conditions, 16332 events. 11930/16332 cut-off events. For 107941/112532 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 93538 event pairs, 3390 based on Foata normal form. 2076/18144 useless extension candidates. Maximal degree in co-relation 66105. Up to 8704 conditions per place. [2023-08-30 20:15:27,624 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 154 selfloop transitions, 16 changer transitions 2/178 dead transitions. [2023-08-30 20:15:27,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 178 transitions, 1746 flow [2023-08-30 20:15:27,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:15:27,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:15:27,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 575 transitions. [2023-08-30 20:15:27,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5424528301886793 [2023-08-30 20:15:27,626 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 575 transitions. [2023-08-30 20:15:27,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 575 transitions. [2023-08-30 20:15:27,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:27,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 575 transitions. [2023-08-30 20:15:27,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:27,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:27,629 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:27,630 INFO L175 Difference]: Start difference. First operand has 89 places, 77 transitions, 676 flow. Second operand 5 states and 575 transitions. [2023-08-30 20:15:27,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 178 transitions, 1746 flow [2023-08-30 20:15:27,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 178 transitions, 1700 flow, removed 23 selfloop flow, removed 0 redundant places. [2023-08-30 20:15:27,790 INFO L231 Difference]: Finished difference. Result has 94 places, 79 transitions, 722 flow [2023-08-30 20:15:27,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=722, PETRI_PLACES=94, PETRI_TRANSITIONS=79} [2023-08-30 20:15:27,790 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 56 predicate places. [2023-08-30 20:15:27,790 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 79 transitions, 722 flow [2023-08-30 20:15:27,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:27,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:27,791 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, 1, 1, 1, 1] [2023-08-30 20:15:27,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 20:15:27,791 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 2 more)] === [2023-08-30 20:15:27,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:27,792 INFO L85 PathProgramCache]: Analyzing trace with hash 439687930, now seen corresponding path program 4 times [2023-08-30 20:15:27,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:27,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506721366] [2023-08-30 20:15:27,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:27,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:27,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:27,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:27,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506721366] [2023-08-30 20:15:27,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506721366] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:15:27,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:15:27,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:15:27,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743067679] [2023-08-30 20:15:27,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:15:27,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:15:27,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:27,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:15:27,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:15:27,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-08-30 20:15:27,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 79 transitions, 722 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:27,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:27,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-08-30 20:15:27,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:29,196 INFO L130 PetriNetUnfolder]: 12388/16950 cut-off events. [2023-08-30 20:15:29,196 INFO L131 PetriNetUnfolder]: For 111307/115949 co-relation queries the response was YES. [2023-08-30 20:15:29,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86451 conditions, 16950 events. 12388/16950 cut-off events. For 111307/115949 co-relation queries the response was YES. Maximal size of possible extension queue 1074. Compared 95622 event pairs, 3634 based on Foata normal form. 1900/18564 useless extension candidates. Maximal degree in co-relation 76477. Up to 8836 conditions per place. [2023-08-30 20:15:29,359 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 155 selfloop transitions, 15 changer transitions 0/176 dead transitions. [2023-08-30 20:15:29,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 176 transitions, 1769 flow [2023-08-30 20:15:29,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:15:29,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:15:29,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 571 transitions. [2023-08-30 20:15:29,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386792452830189 [2023-08-30 20:15:29,362 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 571 transitions. [2023-08-30 20:15:29,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 571 transitions. [2023-08-30 20:15:29,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:29,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 571 transitions. [2023-08-30 20:15:29,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.2) internal successors, (571), 5 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:29,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:29,365 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:29,365 INFO L175 Difference]: Start difference. First operand has 94 places, 79 transitions, 722 flow. Second operand 5 states and 571 transitions. [2023-08-30 20:15:29,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 176 transitions, 1769 flow [2023-08-30 20:15:29,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 176 transitions, 1725 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-30 20:15:29,728 INFO L231 Difference]: Finished difference. Result has 96 places, 80 transitions, 728 flow [2023-08-30 20:15:29,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=728, PETRI_PLACES=96, PETRI_TRANSITIONS=80} [2023-08-30 20:15:29,728 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 58 predicate places. [2023-08-30 20:15:29,729 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 80 transitions, 728 flow [2023-08-30 20:15:29,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:29,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:29,729 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, 1, 1, 1, 1] [2023-08-30 20:15:29,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 20:15:29,729 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 2 more)] === [2023-08-30 20:15:29,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:29,730 INFO L85 PathProgramCache]: Analyzing trace with hash 496335170, now seen corresponding path program 3 times [2023-08-30 20:15:29,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:29,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757500112] [2023-08-30 20:15:29,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:29,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:29,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:29,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757500112] [2023-08-30 20:15:29,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757500112] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:15:29,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:15:29,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:15:29,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042373005] [2023-08-30 20:15:29,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:15:29,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:15:29,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:29,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:15:29,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:15:29,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-08-30 20:15:29,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 80 transitions, 728 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:29,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:29,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-08-30 20:15:29,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:31,076 INFO L130 PetriNetUnfolder]: 13022/17777 cut-off events. [2023-08-30 20:15:31,077 INFO L131 PetriNetUnfolder]: For 115257/120649 co-relation queries the response was YES. [2023-08-30 20:15:31,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90874 conditions, 17777 events. 13022/17777 cut-off events. For 115257/120649 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 99379 event pairs, 3174 based on Foata normal form. 2689/20312 useless extension candidates. Maximal degree in co-relation 82150. Up to 9978 conditions per place. [2023-08-30 20:15:31,174 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 159 selfloop transitions, 13 changer transitions 0/179 dead transitions. [2023-08-30 20:15:31,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 179 transitions, 1966 flow [2023-08-30 20:15:31,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:15:31,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:15:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 567 transitions. [2023-08-30 20:15:31,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349056603773585 [2023-08-30 20:15:31,176 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 567 transitions. [2023-08-30 20:15:31,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 567 transitions. [2023-08-30 20:15:31,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:31,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 567 transitions. [2023-08-30 20:15:31,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:31,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:31,179 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:31,179 INFO L175 Difference]: Start difference. First operand has 96 places, 80 transitions, 728 flow. Second operand 5 states and 567 transitions. [2023-08-30 20:15:31,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 179 transitions, 1966 flow [2023-08-30 20:15:31,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 179 transitions, 1874 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-30 20:15:31,351 INFO L231 Difference]: Finished difference. Result has 98 places, 81 transitions, 735 flow [2023-08-30 20:15:31,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=735, PETRI_PLACES=98, PETRI_TRANSITIONS=81} [2023-08-30 20:15:31,352 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 60 predicate places. [2023-08-30 20:15:31,352 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 81 transitions, 735 flow [2023-08-30 20:15:31,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:31,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:31,352 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, 1, 1, 1, 1] [2023-08-30 20:15:31,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 20:15:31,352 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 2 more)] === [2023-08-30 20:15:31,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:31,353 INFO L85 PathProgramCache]: Analyzing trace with hash 261516316, now seen corresponding path program 4 times [2023-08-30 20:15:31,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:31,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963135347] [2023-08-30 20:15:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:31,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:31,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:31,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963135347] [2023-08-30 20:15:31,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963135347] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:31,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365193903] [2023-08-30 20:15:31,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:15:31,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:31,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:31,392 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:31,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 20:15:31,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:15:31,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:31,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 20:15:31,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:31,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:31,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365193903] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:31,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:31,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 20:15:31,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816888085] [2023-08-30 20:15:31,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:31,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 20:15:31,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:31,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 20:15:31,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 20:15:31,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-30 20:15:31,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 81 transitions, 735 flow. Second operand has 8 states, 8 states have (on average 100.875) internal successors, (807), 8 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:31,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:31,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-30 20:15:31,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:32,688 INFO L130 PetriNetUnfolder]: 13620/18549 cut-off events. [2023-08-30 20:15:32,688 INFO L131 PetriNetUnfolder]: For 116629/122375 co-relation queries the response was YES. [2023-08-30 20:15:32,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96364 conditions, 18549 events. 13620/18549 cut-off events. For 116629/122375 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 104631 event pairs, 1504 based on Foata normal form. 2887/21276 useless extension candidates. Maximal degree in co-relation 87643. Up to 8289 conditions per place. [2023-08-30 20:15:32,812 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 155 selfloop transitions, 16 changer transitions 0/178 dead transitions. [2023-08-30 20:15:32,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 178 transitions, 1933 flow [2023-08-30 20:15:32,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:15:32,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:15:32,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 555 transitions. [2023-08-30 20:15:32,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235849056603774 [2023-08-30 20:15:32,814 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 555 transitions. [2023-08-30 20:15:32,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 555 transitions. [2023-08-30 20:15:32,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:32,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 555 transitions. [2023-08-30 20:15:32,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:32,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:32,817 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:32,817 INFO L175 Difference]: Start difference. First operand has 98 places, 81 transitions, 735 flow. Second operand 5 states and 555 transitions. [2023-08-30 20:15:32,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 178 transitions, 1933 flow [2023-08-30 20:15:33,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 178 transitions, 1899 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 20:15:33,082 INFO L231 Difference]: Finished difference. Result has 101 places, 83 transitions, 777 flow [2023-08-30 20:15:33,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=777, PETRI_PLACES=101, PETRI_TRANSITIONS=83} [2023-08-30 20:15:33,082 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 63 predicate places. [2023-08-30 20:15:33,082 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 83 transitions, 777 flow [2023-08-30 20:15:33,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 100.875) internal successors, (807), 8 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:33,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:33,083 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, 1, 1, 1, 1] [2023-08-30 20:15:33,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 20:15:33,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:33,287 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 2 more)] === [2023-08-30 20:15:33,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:33,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1703650341, now seen corresponding path program 4 times [2023-08-30 20:15:33,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:33,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081488030] [2023-08-30 20:15:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:33,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:33,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:33,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081488030] [2023-08-30 20:15:33,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081488030] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:15:33,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:15:33,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:15:33,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765818340] [2023-08-30 20:15:33,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:15:33,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:15:33,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:33,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:15:33,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:15:33,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 212 [2023-08-30 20:15:33,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 83 transitions, 777 flow. Second operand has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:33,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:33,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 212 [2023-08-30 20:15:33,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:34,567 INFO L130 PetriNetUnfolder]: 13966/19130 cut-off events. [2023-08-30 20:15:34,567 INFO L131 PetriNetUnfolder]: For 140441/146439 co-relation queries the response was YES. [2023-08-30 20:15:34,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100921 conditions, 19130 events. 13966/19130 cut-off events. For 140441/146439 co-relation queries the response was YES. Maximal size of possible extension queue 1121. Compared 109510 event pairs, 3588 based on Foata normal form. 2911/21877 useless extension candidates. Maximal degree in co-relation 91788. Up to 10240 conditions per place. [2023-08-30 20:15:34,686 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 166 selfloop transitions, 17 changer transitions 2/192 dead transitions. [2023-08-30 20:15:34,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 192 transitions, 2089 flow [2023-08-30 20:15:34,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:15:34,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:15:34,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 569 transitions. [2023-08-30 20:15:34,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367924528301887 [2023-08-30 20:15:34,688 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 569 transitions. [2023-08-30 20:15:34,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 569 transitions. [2023-08-30 20:15:34,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:34,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 569 transitions. [2023-08-30 20:15:34,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:34,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:34,691 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:34,691 INFO L175 Difference]: Start difference. First operand has 101 places, 83 transitions, 777 flow. Second operand 5 states and 569 transitions. [2023-08-30 20:15:34,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 192 transitions, 2089 flow [2023-08-30 20:15:35,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 192 transitions, 2067 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 20:15:35,025 INFO L231 Difference]: Finished difference. Result has 106 places, 85 transitions, 837 flow [2023-08-30 20:15:35,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=837, PETRI_PLACES=106, PETRI_TRANSITIONS=85} [2023-08-30 20:15:35,026 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 68 predicate places. [2023-08-30 20:15:35,026 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 85 transitions, 837 flow [2023-08-30 20:15:35,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:35,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:35,026 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, 1, 1, 1, 1] [2023-08-30 20:15:35,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 20:15:35,027 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 2 more)] === [2023-08-30 20:15:35,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:35,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1101080746, now seen corresponding path program 5 times [2023-08-30 20:15:35,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:35,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072676472] [2023-08-30 20:15:35,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:35,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:35,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:35,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:35,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072676472] [2023-08-30 20:15:35,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072676472] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:15:35,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:15:35,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:15:35,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183673235] [2023-08-30 20:15:35,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:15:35,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:15:35,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:35,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:15:35,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:15:35,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-08-30 20:15:35,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 85 transitions, 837 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:35,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:35,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-08-30 20:15:35,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:36,410 INFO L130 PetriNetUnfolder]: 13782/18946 cut-off events. [2023-08-30 20:15:36,411 INFO L131 PetriNetUnfolder]: For 144705/150703 co-relation queries the response was YES. [2023-08-30 20:15:36,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104440 conditions, 18946 events. 13782/18946 cut-off events. For 144705/150703 co-relation queries the response was YES. Maximal size of possible extension queue 1121. Compared 109100 event pairs, 3110 based on Foata normal form. 3003/21785 useless extension candidates. Maximal degree in co-relation 94992. Up to 8406 conditions per place. [2023-08-30 20:15:36,617 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 161 selfloop transitions, 19 changer transitions 0/187 dead transitions. [2023-08-30 20:15:36,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 187 transitions, 2056 flow [2023-08-30 20:15:36,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:15:36,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:15:36,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 569 transitions. [2023-08-30 20:15:36,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367924528301887 [2023-08-30 20:15:36,619 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 569 transitions. [2023-08-30 20:15:36,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 569 transitions. [2023-08-30 20:15:36,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:36,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 569 transitions. [2023-08-30 20:15:36,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:36,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:36,641 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:36,641 INFO L175 Difference]: Start difference. First operand has 106 places, 85 transitions, 837 flow. Second operand 5 states and 569 transitions. [2023-08-30 20:15:36,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 187 transitions, 2056 flow [2023-08-30 20:15:37,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 187 transitions, 2032 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-30 20:15:37,084 INFO L231 Difference]: Finished difference. Result has 110 places, 86 transitions, 870 flow [2023-08-30 20:15:37,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=870, PETRI_PLACES=110, PETRI_TRANSITIONS=86} [2023-08-30 20:15:37,084 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 72 predicate places. [2023-08-30 20:15:37,085 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 86 transitions, 870 flow [2023-08-30 20:15:37,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:37,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:37,085 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, 1, 1, 1, 1] [2023-08-30 20:15:37,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 20:15:37,085 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 2 more)] === [2023-08-30 20:15:37,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:37,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1916988810, now seen corresponding path program 6 times [2023-08-30 20:15:37,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:37,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938551527] [2023-08-30 20:15:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:37,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:37,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:37,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938551527] [2023-08-30 20:15:37,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938551527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:15:37,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:15:37,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:15:37,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337459356] [2023-08-30 20:15:37,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:15:37,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:15:37,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:37,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:15:37,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:15:37,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-08-30 20:15:37,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 86 transitions, 870 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:37,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:37,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-08-30 20:15:37,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:38,428 INFO L130 PetriNetUnfolder]: 12572/17218 cut-off events. [2023-08-30 20:15:38,429 INFO L131 PetriNetUnfolder]: For 144675/150095 co-relation queries the response was YES. [2023-08-30 20:15:38,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96545 conditions, 17218 events. 12572/17218 cut-off events. For 144675/150095 co-relation queries the response was YES. Maximal size of possible extension queue 1019. Compared 97225 event pairs, 3226 based on Foata normal form. 2755/19817 useless extension candidates. Maximal degree in co-relation 87804. Up to 9096 conditions per place. [2023-08-30 20:15:38,546 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 177 selfloop transitions, 22 changer transitions 4/210 dead transitions. [2023-08-30 20:15:38,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 210 transitions, 2349 flow [2023-08-30 20:15:38,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 20:15:38,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 20:15:38,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 674 transitions. [2023-08-30 20:15:38,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529874213836478 [2023-08-30 20:15:38,548 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 674 transitions. [2023-08-30 20:15:38,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 674 transitions. [2023-08-30 20:15:38,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:38,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 674 transitions. [2023-08-30 20:15:38,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 112.33333333333333) internal successors, (674), 6 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:38,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:38,551 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:38,552 INFO L175 Difference]: Start difference. First operand has 110 places, 86 transitions, 870 flow. Second operand 6 states and 674 transitions. [2023-08-30 20:15:38,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 210 transitions, 2349 flow [2023-08-30 20:15:39,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 210 transitions, 2308 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 20:15:39,032 INFO L231 Difference]: Finished difference. Result has 113 places, 89 transitions, 926 flow [2023-08-30 20:15:39,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=926, PETRI_PLACES=113, PETRI_TRANSITIONS=89} [2023-08-30 20:15:39,033 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 75 predicate places. [2023-08-30 20:15:39,033 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 89 transitions, 926 flow [2023-08-30 20:15:39,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:39,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:39,034 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, 1, 1, 1, 1] [2023-08-30 20:15:39,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 20:15:39,034 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 2 more)] === [2023-08-30 20:15:39,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:39,034 INFO L85 PathProgramCache]: Analyzing trace with hash -834954938, now seen corresponding path program 5 times [2023-08-30 20:15:39,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:39,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614429922] [2023-08-30 20:15:39,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:39,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:39,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:39,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614429922] [2023-08-30 20:15:39,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614429922] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:15:39,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:15:39,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:15:39,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015422047] [2023-08-30 20:15:39,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:15:39,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:15:39,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:39,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:15:39,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:15:39,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-08-30 20:15:39,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 89 transitions, 926 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:39,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:39,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-08-30 20:15:39,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:40,160 INFO L130 PetriNetUnfolder]: 11478/15699 cut-off events. [2023-08-30 20:15:40,161 INFO L131 PetriNetUnfolder]: For 158993/165969 co-relation queries the response was YES. [2023-08-30 20:15:40,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88786 conditions, 15699 events. 11478/15699 cut-off events. For 158993/165969 co-relation queries the response was YES. Maximal size of possible extension queue 1109. Compared 90292 event pairs, 2724 based on Foata normal form. 2978/18424 useless extension candidates. Maximal degree in co-relation 80026. Up to 8044 conditions per place. [2023-08-30 20:15:40,548 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 192 selfloop transitions, 22 changer transitions 14/236 dead transitions. [2023-08-30 20:15:40,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 236 transitions, 2900 flow [2023-08-30 20:15:40,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 20:15:40,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 20:15:40,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 678 transitions. [2023-08-30 20:15:40,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330188679245284 [2023-08-30 20:15:40,550 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 678 transitions. [2023-08-30 20:15:40,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 678 transitions. [2023-08-30 20:15:40,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:40,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 678 transitions. [2023-08-30 20:15:40,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:40,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:40,553 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:40,553 INFO L175 Difference]: Start difference. First operand has 113 places, 89 transitions, 926 flow. Second operand 6 states and 678 transitions. [2023-08-30 20:15:40,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 236 transitions, 2900 flow [2023-08-30 20:15:40,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 236 transitions, 2681 flow, removed 68 selfloop flow, removed 4 redundant places. [2023-08-30 20:15:40,841 INFO L231 Difference]: Finished difference. Result has 116 places, 93 transitions, 983 flow [2023-08-30 20:15:40,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=983, PETRI_PLACES=116, PETRI_TRANSITIONS=93} [2023-08-30 20:15:40,842 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 78 predicate places. [2023-08-30 20:15:40,842 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 93 transitions, 983 flow [2023-08-30 20:15:40,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:40,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:40,842 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, 1, 1, 1, 1] [2023-08-30 20:15:40,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 20:15:40,843 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 2 more)] === [2023-08-30 20:15:40,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:40,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1962537474, now seen corresponding path program 6 times [2023-08-30 20:15:40,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:40,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901756785] [2023-08-30 20:15:40,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:40,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:40,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:40,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901756785] [2023-08-30 20:15:40,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901756785] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:15:40,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:15:40,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:15:40,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074774684] [2023-08-30 20:15:40,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:15:40,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:15:40,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:40,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:15:40,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:15:40,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-08-30 20:15:40,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 93 transitions, 983 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:40,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:40,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-08-30 20:15:40,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:42,131 INFO L130 PetriNetUnfolder]: 10594/14533 cut-off events. [2023-08-30 20:15:42,132 INFO L131 PetriNetUnfolder]: For 149934/156027 co-relation queries the response was YES. [2023-08-30 20:15:42,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84105 conditions, 14533 events. 10594/14533 cut-off events. For 149934/156027 co-relation queries the response was YES. Maximal size of possible extension queue 1054. Compared 81784 event pairs, 2384 based on Foata normal form. 2529/16860 useless extension candidates. Maximal degree in co-relation 75793. Up to 6316 conditions per place. [2023-08-30 20:15:42,241 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 180 selfloop transitions, 19 changer transitions 0/207 dead transitions. [2023-08-30 20:15:42,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 207 transitions, 2457 flow [2023-08-30 20:15:42,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:15:42,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:15:42,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 567 transitions. [2023-08-30 20:15:42,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349056603773585 [2023-08-30 20:15:42,243 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 567 transitions. [2023-08-30 20:15:42,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 567 transitions. [2023-08-30 20:15:42,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:42,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 567 transitions. [2023-08-30 20:15:42,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:42,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:42,246 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:42,246 INFO L175 Difference]: Start difference. First operand has 116 places, 93 transitions, 983 flow. Second operand 5 states and 567 transitions. [2023-08-30 20:15:42,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 207 transitions, 2457 flow [2023-08-30 20:15:42,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 207 transitions, 2394 flow, removed 13 selfloop flow, removed 3 redundant places. [2023-08-30 20:15:42,611 INFO L231 Difference]: Finished difference. Result has 118 places, 94 transitions, 990 flow [2023-08-30 20:15:42,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=990, PETRI_PLACES=118, PETRI_TRANSITIONS=94} [2023-08-30 20:15:42,612 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 80 predicate places. [2023-08-30 20:15:42,612 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 94 transitions, 990 flow [2023-08-30 20:15:42,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:42,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:42,613 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, 1, 1, 1, 1, 1] [2023-08-30 20:15:42,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 20:15:42,613 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 2 more)] === [2023-08-30 20:15:42,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:42,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1846128017, now seen corresponding path program 1 times [2023-08-30 20:15:42,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:42,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757360113] [2023-08-30 20:15:42,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:42,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:15:42,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:42,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757360113] [2023-08-30 20:15:42,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757360113] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:15:42,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:15:42,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 20:15:42,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758223211] [2023-08-30 20:15:42,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:15:42,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:15:42,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:42,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:15:42,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:15:42,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 212 [2023-08-30 20:15:42,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 94 transitions, 990 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:42,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:42,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 212 [2023-08-30 20:15:42,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:43,283 INFO L130 PetriNetUnfolder]: 6080/8552 cut-off events. [2023-08-30 20:15:43,283 INFO L131 PetriNetUnfolder]: For 104356/111588 co-relation queries the response was YES. [2023-08-30 20:15:43,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49938 conditions, 8552 events. 6080/8552 cut-off events. For 104356/111588 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 49692 event pairs, 2052 based on Foata normal form. 3234/11552 useless extension candidates. Maximal degree in co-relation 46225. Up to 5745 conditions per place. [2023-08-30 20:15:43,333 INFO L137 encePairwiseOnDemand]: 209/212 looper letters, 80 selfloop transitions, 10 changer transitions 15/119 dead transitions. [2023-08-30 20:15:43,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 119 transitions, 1359 flow [2023-08-30 20:15:43,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:15:43,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:15:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2023-08-30 20:15:43,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738993710691824 [2023-08-30 20:15:43,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2023-08-30 20:15:43,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2023-08-30 20:15:43,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:43,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2023-08-30 20:15:43,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:43,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 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) [2023-08-30 20:15:43,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 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) [2023-08-30 20:15:43,336 INFO L175 Difference]: Start difference. First operand has 118 places, 94 transitions, 990 flow. Second operand 3 states and 365 transitions. [2023-08-30 20:15:43,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 119 transitions, 1359 flow [2023-08-30 20:15:43,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 119 transitions, 1316 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 20:15:43,454 INFO L231 Difference]: Finished difference. Result has 118 places, 83 transitions, 869 flow [2023-08-30 20:15:43,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=869, PETRI_PLACES=118, PETRI_TRANSITIONS=83} [2023-08-30 20:15:43,455 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 80 predicate places. [2023-08-30 20:15:43,455 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 83 transitions, 869 flow [2023-08-30 20:15:43,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:43,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:43,455 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, 1, 1, 1, 1, 1] [2023-08-30 20:15:43,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 20:15:43,456 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 2 more)] === [2023-08-30 20:15:43,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:43,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1030320933, now seen corresponding path program 1 times [2023-08-30 20:15:43,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:43,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98994556] [2023-08-30 20:15:43,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:43,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:43,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:43,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98994556] [2023-08-30 20:15:43,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98994556] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:43,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461993672] [2023-08-30 20:15:43,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:43,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:43,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:43,531 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:43,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 20:15:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:43,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 20:15:43,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:43,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:15:43,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461993672] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:43,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:43,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-08-30 20:15:43,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927286847] [2023-08-30 20:15:43,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:43,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 20:15:43,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:43,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 20:15:43,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 20:15:43,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 212 [2023-08-30 20:15:43,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 83 transitions, 869 flow. Second operand has 7 states, 7 states have (on average 111.71428571428571) internal successors, (782), 7 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:43,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:43,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 212 [2023-08-30 20:15:43,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:44,880 INFO L130 PetriNetUnfolder]: 11144/15339 cut-off events. [2023-08-30 20:15:44,880 INFO L131 PetriNetUnfolder]: For 142210/151798 co-relation queries the response was YES. [2023-08-30 20:15:44,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83356 conditions, 15339 events. 11144/15339 cut-off events. For 142210/151798 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 86220 event pairs, 1030 based on Foata normal form. 4585/19766 useless extension candidates. Maximal degree in co-relation 82420. Up to 8061 conditions per place. [2023-08-30 20:15:44,990 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 163 selfloop transitions, 83 changer transitions 5/265 dead transitions. [2023-08-30 20:15:44,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 265 transitions, 2815 flow [2023-08-30 20:15:44,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:15:44,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:15:44,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 863 transitions. [2023-08-30 20:15:44,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5815363881401617 [2023-08-30 20:15:44,992 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 863 transitions. [2023-08-30 20:15:44,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 863 transitions. [2023-08-30 20:15:44,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:44,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 863 transitions. [2023-08-30 20:15:44,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 123.28571428571429) internal successors, (863), 7 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:44,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:44,995 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:44,995 INFO L175 Difference]: Start difference. First operand has 118 places, 83 transitions, 869 flow. Second operand 7 states and 863 transitions. [2023-08-30 20:15:44,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 265 transitions, 2815 flow [2023-08-30 20:15:45,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 265 transitions, 2738 flow, removed 11 selfloop flow, removed 11 redundant places. [2023-08-30 20:15:45,290 INFO L231 Difference]: Finished difference. Result has 111 places, 150 transitions, 1877 flow [2023-08-30 20:15:45,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1877, PETRI_PLACES=111, PETRI_TRANSITIONS=150} [2023-08-30 20:15:45,290 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 73 predicate places. [2023-08-30 20:15:45,291 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 150 transitions, 1877 flow [2023-08-30 20:15:45,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.71428571428571) internal successors, (782), 7 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:45,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:45,291 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, 1, 1, 1, 1, 1] [2023-08-30 20:15:45,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 20:15:45,495 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,SelfDestructingSolverStorable21 [2023-08-30 20:15:45,495 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 2 more)] === [2023-08-30 20:15:45,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:45,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1938151797, now seen corresponding path program 2 times [2023-08-30 20:15:45,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:45,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869030492] [2023-08-30 20:15:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:45,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:45,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:45,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869030492] [2023-08-30 20:15:45,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869030492] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:45,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287772213] [2023-08-30 20:15:45,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:15:45,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:45,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:45,576 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:45,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 20:15:45,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:15:45,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:45,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 20:15:45,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:45,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:45,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287772213] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:45,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:45,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-08-30 20:15:45,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443363716] [2023-08-30 20:15:45,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:45,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 20:15:45,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:45,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 20:15:45,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 20:15:45,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 212 [2023-08-30 20:15:45,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 150 transitions, 1877 flow. Second operand has 7 states, 7 states have (on average 111.71428571428571) internal successors, (782), 7 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:45,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:45,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 212 [2023-08-30 20:15:45,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:47,688 INFO L130 PetriNetUnfolder]: 16518/22700 cut-off events. [2023-08-30 20:15:47,688 INFO L131 PetriNetUnfolder]: For 224549/237152 co-relation queries the response was YES. [2023-08-30 20:15:47,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131803 conditions, 22700 events. 16518/22700 cut-off events. For 224549/237152 co-relation queries the response was YES. Maximal size of possible extension queue 1280. Compared 133422 event pairs, 2818 based on Foata normal form. 5149/27700 useless extension candidates. Maximal degree in co-relation 115802. Up to 16448 conditions per place. [2023-08-30 20:15:47,821 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 235 selfloop transitions, 79 changer transitions 5/333 dead transitions. [2023-08-30 20:15:47,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 333 transitions, 4176 flow [2023-08-30 20:15:47,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:15:47,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:15:47,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 859 transitions. [2023-08-30 20:15:47,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5788409703504043 [2023-08-30 20:15:47,823 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 859 transitions. [2023-08-30 20:15:47,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 859 transitions. [2023-08-30 20:15:47,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:47,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 859 transitions. [2023-08-30 20:15:47,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 122.71428571428571) internal successors, (859), 7 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:47,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:47,826 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:47,826 INFO L175 Difference]: Start difference. First operand has 111 places, 150 transitions, 1877 flow. Second operand 7 states and 859 transitions. [2023-08-30 20:15:47,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 333 transitions, 4176 flow [2023-08-30 20:15:48,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 333 transitions, 3970 flow, removed 103 selfloop flow, removed 0 redundant places. [2023-08-30 20:15:48,239 INFO L231 Difference]: Finished difference. Result has 120 places, 222 transitions, 2956 flow [2023-08-30 20:15:48,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2956, PETRI_PLACES=120, PETRI_TRANSITIONS=222} [2023-08-30 20:15:48,240 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 82 predicate places. [2023-08-30 20:15:48,240 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 222 transitions, 2956 flow [2023-08-30 20:15:48,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.71428571428571) internal successors, (782), 7 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:48,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:48,240 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, 1, 1, 1, 1, 1] [2023-08-30 20:15:48,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 20:15:48,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:48,445 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 2 more)] === [2023-08-30 20:15:48,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:48,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1252895162, now seen corresponding path program 3 times [2023-08-30 20:15:48,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:48,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282041107] [2023-08-30 20:15:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:48,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:48,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:48,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282041107] [2023-08-30 20:15:48,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282041107] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:48,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095179886] [2023-08-30 20:15:48,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:15:48,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:48,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:48,520 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:48,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 20:15:48,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:15:48,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:48,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:15:48,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:48,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:48,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095179886] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:48,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:48,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-30 20:15:48,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117529713] [2023-08-30 20:15:48,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:48,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 20:15:48,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:48,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 20:15:48,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-30 20:15:48,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-30 20:15:48,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 222 transitions, 2956 flow. Second operand has 11 states, 11 states have (on average 100.0909090909091) internal successors, (1101), 11 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:48,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:48,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-30 20:15:48,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:51,621 INFO L130 PetriNetUnfolder]: 24378/33563 cut-off events. [2023-08-30 20:15:51,621 INFO L131 PetriNetUnfolder]: For 352237/367754 co-relation queries the response was YES. [2023-08-30 20:15:51,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195633 conditions, 33563 events. 24378/33563 cut-off events. For 352237/367754 co-relation queries the response was YES. Maximal size of possible extension queue 1780. Compared 206013 event pairs, 4662 based on Foata normal form. 6301/39773 useless extension candidates. Maximal degree in co-relation 178805. Up to 17876 conditions per place. [2023-08-30 20:15:51,932 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 424 selfloop transitions, 39 changer transitions 0/471 dead transitions. [2023-08-30 20:15:51,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 471 transitions, 6731 flow [2023-08-30 20:15:51,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:15:51,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:15:51,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 786 transitions. [2023-08-30 20:15:51,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296495956873315 [2023-08-30 20:15:51,933 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 786 transitions. [2023-08-30 20:15:51,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 786 transitions. [2023-08-30 20:15:51,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:51,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 786 transitions. [2023-08-30 20:15:51,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 112.28571428571429) internal successors, (786), 7 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:51,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:51,936 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:51,936 INFO L175 Difference]: Start difference. First operand has 120 places, 222 transitions, 2956 flow. Second operand 7 states and 786 transitions. [2023-08-30 20:15:51,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 471 transitions, 6731 flow [2023-08-30 20:15:53,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 471 transitions, 6219 flow, removed 256 selfloop flow, removed 0 redundant places. [2023-08-30 20:15:53,070 INFO L231 Difference]: Finished difference. Result has 130 places, 245 transitions, 3052 flow [2023-08-30 20:15:53,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=2634, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3052, PETRI_PLACES=130, PETRI_TRANSITIONS=245} [2023-08-30 20:15:53,071 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 92 predicate places. [2023-08-30 20:15:53,071 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 245 transitions, 3052 flow [2023-08-30 20:15:53,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 100.0909090909091) internal successors, (1101), 11 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:53,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:53,071 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, 1, 1, 1, 1, 1] [2023-08-30 20:15:53,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 20:15:53,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-30 20:15:53,276 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 2 more)] === [2023-08-30 20:15:53,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:53,276 INFO L85 PathProgramCache]: Analyzing trace with hash -563281195, now seen corresponding path program 4 times [2023-08-30 20:15:53,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:53,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83647295] [2023-08-30 20:15:53,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:53,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:53,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:53,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83647295] [2023-08-30 20:15:53,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83647295] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:53,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661117013] [2023-08-30 20:15:53,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:15:53,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:53,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:53,361 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:53,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 20:15:53,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:15:53,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:53,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:15:53,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:53,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:53,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661117013] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:53,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:53,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-30 20:15:53,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842933576] [2023-08-30 20:15:53,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:53,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 20:15:53,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:53,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 20:15:53,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-30 20:15:53,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-30 20:15:53,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 245 transitions, 3052 flow. Second operand has 11 states, 11 states have (on average 100.18181818181819) internal successors, (1102), 11 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:53,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:53,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-30 20:15:53,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:15:57,544 INFO L130 PetriNetUnfolder]: 25169/34809 cut-off events. [2023-08-30 20:15:57,545 INFO L131 PetriNetUnfolder]: For 399996/414714 co-relation queries the response was YES. [2023-08-30 20:15:57,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203217 conditions, 34809 events. 25169/34809 cut-off events. For 399996/414714 co-relation queries the response was YES. Maximal size of possible extension queue 1873. Compared 220721 event pairs, 4386 based on Foata normal form. 6104/40636 useless extension candidates. Maximal degree in co-relation 184960. Up to 16345 conditions per place. [2023-08-30 20:15:57,808 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 721 selfloop transitions, 54 changer transitions 34/817 dead transitions. [2023-08-30 20:15:57,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 817 transitions, 11389 flow [2023-08-30 20:15:57,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 20:15:57,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 20:15:57,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1215 transitions. [2023-08-30 20:15:57,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210120068610634 [2023-08-30 20:15:57,810 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1215 transitions. [2023-08-30 20:15:57,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1215 transitions. [2023-08-30 20:15:57,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:15:57,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1215 transitions. [2023-08-30 20:15:57,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 110.45454545454545) internal successors, (1215), 11 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:57,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 212.0) internal successors, (2544), 12 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:57,814 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 212.0) internal successors, (2544), 12 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:57,814 INFO L175 Difference]: Start difference. First operand has 130 places, 245 transitions, 3052 flow. Second operand 11 states and 1215 transitions. [2023-08-30 20:15:57,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 817 transitions, 11389 flow [2023-08-30 20:15:58,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 817 transitions, 11302 flow, removed 29 selfloop flow, removed 2 redundant places. [2023-08-30 20:15:58,820 INFO L231 Difference]: Finished difference. Result has 143 places, 273 transitions, 3501 flow [2023-08-30 20:15:58,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=2984, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3501, PETRI_PLACES=143, PETRI_TRANSITIONS=273} [2023-08-30 20:15:58,821 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 105 predicate places. [2023-08-30 20:15:58,821 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 273 transitions, 3501 flow [2023-08-30 20:15:58,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 100.18181818181819) internal successors, (1102), 11 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:58,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:15:58,822 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, 1, 1, 1, 1, 1] [2023-08-30 20:15:58,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 20:15:59,026 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,SelfDestructingSolverStorable24 [2023-08-30 20:15:59,026 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 2 more)] === [2023-08-30 20:15:59,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:15:59,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1667997905, now seen corresponding path program 5 times [2023-08-30 20:15:59,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:15:59,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708203057] [2023-08-30 20:15:59,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:15:59,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:15:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:15:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:59,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:15:59,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708203057] [2023-08-30 20:15:59,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708203057] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:15:59,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249859185] [2023-08-30 20:15:59,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:15:59,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:15:59,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:15:59,075 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:15:59,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 20:15:59,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:15:59,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:15:59,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:15:59,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:15:59,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:59,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:15:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:15:59,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249859185] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:15:59,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:15:59,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 20:15:59,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902788867] [2023-08-30 20:15:59,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:15:59,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 20:15:59,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:15:59,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 20:15:59,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-30 20:15:59,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-30 20:15:59,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 273 transitions, 3501 flow. Second operand has 12 states, 12 states have (on average 100.0) internal successors, (1200), 12 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:15:59,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:15:59,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-30 20:15:59,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:16:06,754 INFO L130 PetriNetUnfolder]: 45403/62726 cut-off events. [2023-08-30 20:16:06,754 INFO L131 PetriNetUnfolder]: For 689282/716371 co-relation queries the response was YES. [2023-08-30 20:16:07,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379482 conditions, 62726 events. 45403/62726 cut-off events. For 689282/716371 co-relation queries the response was YES. Maximal size of possible extension queue 3089. Compared 416038 event pairs, 10097 based on Foata normal form. 11614/74086 useless extension candidates. Maximal degree in co-relation 332966. Up to 23541 conditions per place. [2023-08-30 20:16:07,603 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 740 selfloop transitions, 152 changer transitions 0/900 dead transitions. [2023-08-30 20:16:07,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 900 transitions, 12321 flow [2023-08-30 20:16:07,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 20:16:07,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 20:16:07,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1459 transitions. [2023-08-30 20:16:07,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5293904208998549 [2023-08-30 20:16:07,605 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1459 transitions. [2023-08-30 20:16:07,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1459 transitions. [2023-08-30 20:16:07,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:16:07,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1459 transitions. [2023-08-30 20:16:07,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 112.23076923076923) internal successors, (1459), 13 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:07,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 212.0) internal successors, (2968), 14 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:07,608 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 212.0) internal successors, (2968), 14 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:07,609 INFO L175 Difference]: Start difference. First operand has 143 places, 273 transitions, 3501 flow. Second operand 13 states and 1459 transitions. [2023-08-30 20:16:07,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 900 transitions, 12321 flow [2023-08-30 20:16:11,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 900 transitions, 12068 flow, removed 87 selfloop flow, removed 1 redundant places. [2023-08-30 20:16:11,238 INFO L231 Difference]: Finished difference. Result has 161 places, 372 transitions, 5050 flow [2023-08-30 20:16:11,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=3386, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5050, PETRI_PLACES=161, PETRI_TRANSITIONS=372} [2023-08-30 20:16:11,239 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 123 predicate places. [2023-08-30 20:16:11,239 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 372 transitions, 5050 flow [2023-08-30 20:16:11,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 100.0) internal successors, (1200), 12 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:11,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:16:11,239 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, 1, 1, 1, 1, 1] [2023-08-30 20:16:11,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-30 20:16:11,443 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,SelfDestructingSolverStorable25 [2023-08-30 20:16:11,443 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 2 more)] === [2023-08-30 20:16:11,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:16:11,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2081496792, now seen corresponding path program 6 times [2023-08-30 20:16:11,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:16:11,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981849906] [2023-08-30 20:16:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:16:11,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:16:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:16:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:16:11,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:16:11,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981849906] [2023-08-30 20:16:11,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981849906] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:16:11,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419602043] [2023-08-30 20:16:11,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:16:11,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:16:11,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:16:11,499 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) [2023-08-30 20:16:11,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 20:16:11,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:16:11,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:16:11,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:16:11,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:16:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:16:11,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:16:11,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:16:11,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419602043] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:16:11,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:16:11,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-30 20:16:11,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556984902] [2023-08-30 20:16:11,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:16:11,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 20:16:11,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:16:11,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 20:16:11,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-30 20:16:11,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-30 20:16:11,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 372 transitions, 5050 flow. Second operand has 13 states, 13 states have (on average 100.15384615384616) internal successors, (1302), 13 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:11,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:16:11,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-30 20:16:11,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:16:21,593 INFO L130 PetriNetUnfolder]: 55320/75974 cut-off events. [2023-08-30 20:16:21,593 INFO L131 PetriNetUnfolder]: For 974343/1006837 co-relation queries the response was YES. [2023-08-30 20:16:22,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481478 conditions, 75974 events. 55320/75974 cut-off events. For 974343/1006837 co-relation queries the response was YES. Maximal size of possible extension queue 3587. Compared 506851 event pairs, 13827 based on Foata normal form. 15177/90969 useless extension candidates. Maximal degree in co-relation 422526. Up to 57946 conditions per place. [2023-08-30 20:16:22,575 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 691 selfloop transitions, 103 changer transitions 0/802 dead transitions. [2023-08-30 20:16:22,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 802 transitions, 11760 flow [2023-08-30 20:16:22,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 20:16:22,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 20:16:22,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1222 transitions. [2023-08-30 20:16:22,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5240137221269296 [2023-08-30 20:16:22,578 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1222 transitions. [2023-08-30 20:16:22,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1222 transitions. [2023-08-30 20:16:22,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:16:22,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1222 transitions. [2023-08-30 20:16:22,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 111.0909090909091) internal successors, (1222), 11 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:22,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 212.0) internal successors, (2544), 12 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:22,581 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 212.0) internal successors, (2544), 12 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:22,581 INFO L175 Difference]: Start difference. First operand has 161 places, 372 transitions, 5050 flow. Second operand 11 states and 1222 transitions. [2023-08-30 20:16:22,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 802 transitions, 11760 flow [2023-08-30 20:16:28,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 802 transitions, 11424 flow, removed 99 selfloop flow, removed 5 redundant places. [2023-08-30 20:16:28,403 INFO L231 Difference]: Finished difference. Result has 171 places, 427 transitions, 5892 flow [2023-08-30 20:16:28,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=4749, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5892, PETRI_PLACES=171, PETRI_TRANSITIONS=427} [2023-08-30 20:16:28,404 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 133 predicate places. [2023-08-30 20:16:28,404 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 427 transitions, 5892 flow [2023-08-30 20:16:28,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 100.15384615384616) internal successors, (1302), 13 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:28,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:16:28,404 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, 1, 1, 1, 1, 1] [2023-08-30 20:16:28,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 20:16:28,608 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,SelfDestructingSolverStorable26 [2023-08-30 20:16:28,609 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 2 more)] === [2023-08-30 20:16:28,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:16:28,609 INFO L85 PathProgramCache]: Analyzing trace with hash 219334723, now seen corresponding path program 7 times [2023-08-30 20:16:28,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:16:28,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839657665] [2023-08-30 20:16:28,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:16:28,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:16:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:16:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:16:28,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:16:28,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839657665] [2023-08-30 20:16:28,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839657665] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:16:28,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813823947] [2023-08-30 20:16:28,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:16:28,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:16:28,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:16:28,661 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) [2023-08-30 20:16:28,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 20:16:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:16:28,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:16:28,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:16:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:16:28,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:16:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:16:28,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813823947] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:16:28,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:16:28,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 20:16:28,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527301976] [2023-08-30 20:16:28,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:16:28,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 20:16:28,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:16:28,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 20:16:28,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-30 20:16:28,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-30 20:16:28,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 427 transitions, 5892 flow. Second operand has 12 states, 12 states have (on average 99.83333333333333) internal successors, (1198), 12 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:28,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:16:28,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-30 20:16:28,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:16:40,818 INFO L130 PetriNetUnfolder]: 61521/85623 cut-off events. [2023-08-30 20:16:40,819 INFO L131 PetriNetUnfolder]: For 1297055/1334172 co-relation queries the response was YES. [2023-08-30 20:16:41,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573590 conditions, 85623 events. 61521/85623 cut-off events. For 1297055/1334172 co-relation queries the response was YES. Maximal size of possible extension queue 4184. Compared 604658 event pairs, 10504 based on Foata normal form. 16393/101726 useless extension candidates. Maximal degree in co-relation 503489. Up to 29926 conditions per place. [2023-08-30 20:16:42,222 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 1284 selfloop transitions, 171 changer transitions 13/1476 dead transitions. [2023-08-30 20:16:42,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 1476 transitions, 21403 flow [2023-08-30 20:16:42,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 20:16:42,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 20:16:42,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1996 transitions. [2023-08-30 20:16:42,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230607966457023 [2023-08-30 20:16:42,224 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1996 transitions. [2023-08-30 20:16:42,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1996 transitions. [2023-08-30 20:16:42,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:16:42,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1996 transitions. [2023-08-30 20:16:42,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 110.88888888888889) internal successors, (1996), 18 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:42,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 212.0) internal successors, (4028), 19 states have internal predecessors, (4028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:42,257 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 212.0) internal successors, (4028), 19 states have internal predecessors, (4028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:42,257 INFO L175 Difference]: Start difference. First operand has 171 places, 427 transitions, 5892 flow. Second operand 18 states and 1996 transitions. [2023-08-30 20:16:42,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 1476 transitions, 21403 flow [2023-08-30 20:16:53,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 1476 transitions, 20887 flow, removed 245 selfloop flow, removed 2 redundant places. [2023-08-30 20:16:53,771 INFO L231 Difference]: Finished difference. Result has 192 places, 492 transitions, 6725 flow [2023-08-30 20:16:53,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=5402, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6725, PETRI_PLACES=192, PETRI_TRANSITIONS=492} [2023-08-30 20:16:53,772 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 154 predicate places. [2023-08-30 20:16:53,772 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 492 transitions, 6725 flow [2023-08-30 20:16:53,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 99.83333333333333) internal successors, (1198), 12 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:53,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:16:53,772 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, 1, 1, 1, 1, 1] [2023-08-30 20:16:53,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 20:16:53,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:16:53,973 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 2 more)] === [2023-08-30 20:16:53,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:16:53,974 INFO L85 PathProgramCache]: Analyzing trace with hash -953766959, now seen corresponding path program 8 times [2023-08-30 20:16:53,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:16:53,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483547097] [2023-08-30 20:16:53,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:16:53,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:16:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:16:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:16:54,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:16:54,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483547097] [2023-08-30 20:16:54,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483547097] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:16:54,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564252509] [2023-08-30 20:16:54,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:16:54,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:16:54,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:16:54,032 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) [2023-08-30 20:16:54,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 20:16:54,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:16:54,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:16:54,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:16:54,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:16:54,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:16:54,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:16:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:16:54,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564252509] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:16:54,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:16:54,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-30 20:16:54,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943697446] [2023-08-30 20:16:54,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:16:54,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 20:16:54,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:16:54,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 20:16:54,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-08-30 20:16:54,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-30 20:16:54,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 492 transitions, 6725 flow. Second operand has 13 states, 13 states have (on average 100.3076923076923) internal successors, (1304), 13 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:16:54,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:16:54,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-30 20:16:54,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:17:06,219 INFO L130 PetriNetUnfolder]: 60289/83939 cut-off events. [2023-08-30 20:17:06,220 INFO L131 PetriNetUnfolder]: For 1330333/1365514 co-relation queries the response was YES. [2023-08-30 20:17:07,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566957 conditions, 83939 events. 60289/83939 cut-off events. For 1330333/1365514 co-relation queries the response was YES. Maximal size of possible extension queue 4059. Compared 591297 event pairs, 13863 based on Foata normal form. 15035/98547 useless extension candidates. Maximal degree in co-relation 546224. Up to 40901 conditions per place. [2023-08-30 20:17:07,871 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 1088 selfloop transitions, 156 changer transitions 52/1304 dead transitions. [2023-08-30 20:17:07,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 1304 transitions, 18926 flow [2023-08-30 20:17:07,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 20:17:07,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 20:17:07,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1985 transitions. [2023-08-30 20:17:07,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5201781970649895 [2023-08-30 20:17:07,873 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1985 transitions. [2023-08-30 20:17:07,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1985 transitions. [2023-08-30 20:17:07,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:17:07,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1985 transitions. [2023-08-30 20:17:07,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 110.27777777777777) internal successors, (1985), 18 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:07,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 212.0) internal successors, (4028), 19 states have internal predecessors, (4028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:07,879 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 212.0) internal successors, (4028), 19 states have internal predecessors, (4028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:07,879 INFO L175 Difference]: Start difference. First operand has 192 places, 492 transitions, 6725 flow. Second operand 18 states and 1985 transitions. [2023-08-30 20:17:07,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 1304 transitions, 18926 flow [2023-08-30 20:17:22,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 1304 transitions, 18628 flow, removed 96 selfloop flow, removed 6 redundant places. [2023-08-30 20:17:22,970 INFO L231 Difference]: Finished difference. Result has 205 places, 497 transitions, 6863 flow [2023-08-30 20:17:22,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=6431, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6863, PETRI_PLACES=205, PETRI_TRANSITIONS=497} [2023-08-30 20:17:22,972 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 167 predicate places. [2023-08-30 20:17:22,973 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 497 transitions, 6863 flow [2023-08-30 20:17:22,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 100.3076923076923) internal successors, (1304), 13 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:22,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:17:22,973 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, 1, 1, 1, 1, 1] [2023-08-30 20:17:22,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-30 20:17:23,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 20:17:23,177 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 2 more)] === [2023-08-30 20:17:23,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:17:23,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1142683924, now seen corresponding path program 9 times [2023-08-30 20:17:23,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:17:23,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720440414] [2023-08-30 20:17:23,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:17:23,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:17:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:17:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:17:23,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:17:23,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720440414] [2023-08-30 20:17:23,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720440414] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:17:23,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599559592] [2023-08-30 20:17:23,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:17:23,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:17:23,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:17:23,242 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) [2023-08-30 20:17:23,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 20:17:23,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:17:23,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:17:23,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:17:23,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:17:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:17:23,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:17:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:17:23,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599559592] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:17:23,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:17:23,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 20:17:23,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052074704] [2023-08-30 20:17:23,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:17:23,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 20:17:23,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:17:23,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 20:17:23,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-30 20:17:23,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-30 20:17:23,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 497 transitions, 6863 flow. Second operand has 12 states, 12 states have (on average 100.66666666666667) internal successors, (1208), 12 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:23,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:17:23,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-30 20:17:23,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:17:40,035 INFO L130 PetriNetUnfolder]: 75941/105716 cut-off events. [2023-08-30 20:17:40,035 INFO L131 PetriNetUnfolder]: For 1613808/1657279 co-relation queries the response was YES. [2023-08-30 20:17:41,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 688507 conditions, 105716 events. 75941/105716 cut-off events. For 1613808/1657279 co-relation queries the response was YES. Maximal size of possible extension queue 4980. Compared 754196 event pairs, 15165 based on Foata normal form. 20393/125897 useless extension candidates. Maximal degree in co-relation 651103. Up to 55992 conditions per place. [2023-08-30 20:17:42,148 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 866 selfloop transitions, 211 changer transitions 0/1085 dead transitions. [2023-08-30 20:17:42,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 1085 transitions, 16068 flow [2023-08-30 20:17:42,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 20:17:42,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 20:17:42,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1565 transitions. [2023-08-30 20:17:42,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272911051212938 [2023-08-30 20:17:42,150 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1565 transitions. [2023-08-30 20:17:42,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1565 transitions. [2023-08-30 20:17:42,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:17:42,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1565 transitions. [2023-08-30 20:17:42,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 111.78571428571429) internal successors, (1565), 14 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:42,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 212.0) internal successors, (3180), 15 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:42,154 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 212.0) internal successors, (3180), 15 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:42,154 INFO L175 Difference]: Start difference. First operand has 205 places, 497 transitions, 6863 flow. Second operand 14 states and 1565 transitions. [2023-08-30 20:17:42,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 1085 transitions, 16068 flow [2023-08-30 20:17:52,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 1085 transitions, 15904 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-08-30 20:17:52,531 INFO L231 Difference]: Finished difference. Result has 213 places, 583 transitions, 8800 flow [2023-08-30 20:17:52,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=6715, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8800, PETRI_PLACES=213, PETRI_TRANSITIONS=583} [2023-08-30 20:17:52,532 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 175 predicate places. [2023-08-30 20:17:52,532 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 583 transitions, 8800 flow [2023-08-30 20:17:52,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 100.66666666666667) internal successors, (1208), 12 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:52,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:17:52,532 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, 1, 1, 1, 1, 1] [2023-08-30 20:17:52,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 20:17:52,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:17:52,737 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 2 more)] === [2023-08-30 20:17:52,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:17:52,738 INFO L85 PathProgramCache]: Analyzing trace with hash -707100586, now seen corresponding path program 10 times [2023-08-30 20:17:52,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:17:52,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130185241] [2023-08-30 20:17:52,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:17:52,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:17:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:17:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:17:52,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:17:52,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130185241] [2023-08-30 20:17:52,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130185241] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:17:52,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349129224] [2023-08-30 20:17:52,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:17:52,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:17:52,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:17:52,822 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) [2023-08-30 20:17:52,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 20:17:52,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:17:52,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:17:52,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:17:52,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:17:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:17:52,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:17:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:17:52,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349129224] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:17:52,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:17:52,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 20:17:52,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109223306] [2023-08-30 20:17:52,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:17:52,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 20:17:52,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:17:52,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 20:17:52,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-30 20:17:53,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-30 20:17:53,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 583 transitions, 8800 flow. Second operand has 12 states, 12 states have (on average 100.0) internal successors, (1200), 12 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:17:53,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:17:53,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-30 20:17:53,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:18:10,760 INFO L130 PetriNetUnfolder]: 79900/111345 cut-off events. [2023-08-30 20:18:10,760 INFO L131 PetriNetUnfolder]: For 1877284/1924794 co-relation queries the response was YES. [2023-08-30 20:18:12,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 767209 conditions, 111345 events. 79900/111345 cut-off events. For 1877284/1924794 co-relation queries the response was YES. Maximal size of possible extension queue 5338. Compared 812453 event pairs, 4913 based on Foata normal form. 20623/131853 useless extension candidates. Maximal degree in co-relation 727022. Up to 30749 conditions per place. [2023-08-30 20:18:12,732 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 1239 selfloop transitions, 313 changer transitions 19/1579 dead transitions. [2023-08-30 20:18:12,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 1579 transitions, 24853 flow [2023-08-30 20:18:12,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 20:18:12,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 20:18:12,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2077 transitions. [2023-08-30 20:18:12,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5156405163853028 [2023-08-30 20:18:12,735 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2077 transitions. [2023-08-30 20:18:12,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2077 transitions. [2023-08-30 20:18:12,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:18:12,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2077 transitions. [2023-08-30 20:18:12,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 109.3157894736842) internal successors, (2077), 19 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:12,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 212.0) internal successors, (4240), 20 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:12,742 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 212.0) internal successors, (4240), 20 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:12,742 INFO L175 Difference]: Start difference. First operand has 213 places, 583 transitions, 8800 flow. Second operand 19 states and 2077 transitions. [2023-08-30 20:18:12,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 1579 transitions, 24853 flow [2023-08-30 20:18:33,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 1579 transitions, 24077 flow, removed 293 selfloop flow, removed 9 redundant places. [2023-08-30 20:18:33,508 INFO L231 Difference]: Finished difference. Result has 227 places, 708 transitions, 11108 flow [2023-08-30 20:18:33,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=8040, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=11108, PETRI_PLACES=227, PETRI_TRANSITIONS=708} [2023-08-30 20:18:33,509 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 189 predicate places. [2023-08-30 20:18:33,509 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 708 transitions, 11108 flow [2023-08-30 20:18:33,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 100.0) internal successors, (1200), 12 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:33,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:18:33,509 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, 1, 1, 1, 1, 1] [2023-08-30 20:18:33,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-30 20:18:33,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:18:33,714 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 20:18:33,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:18:33,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1904532894, now seen corresponding path program 11 times [2023-08-30 20:18:33,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:18:33,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768380006] [2023-08-30 20:18:33,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:18:33,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:18:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:18:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:18:33,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:18:33,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768380006] [2023-08-30 20:18:33,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768380006] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:18:33,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314071611] [2023-08-30 20:18:33,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:18:33,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:18:33,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:18:33,761 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) [2023-08-30 20:18:33,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 20:18:33,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:18:33,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:18:33,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:18:33,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:18:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:18:33,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:18:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:18:33,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314071611] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:18:33,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:18:33,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-30 20:18:33,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627828815] [2023-08-30 20:18:33,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:18:33,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 20:18:33,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:18:33,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 20:18:33,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-30 20:18:33,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-30 20:18:33,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 708 transitions, 11108 flow. Second operand has 13 states, 13 states have (on average 100.0) internal successors, (1300), 13 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:18:33,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:18:33,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-30 20:18:33,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:18:59,899 INFO L130 PetriNetUnfolder]: 104986/147241 cut-off events. [2023-08-30 20:18:59,899 INFO L131 PetriNetUnfolder]: For 2646723/2707605 co-relation queries the response was YES. [2023-08-30 20:19:02,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041467 conditions, 147241 events. 104986/147241 cut-off events. For 2646723/2707605 co-relation queries the response was YES. Maximal size of possible extension queue 6943. Compared 1119030 event pairs, 6087 based on Foata normal form. 27299/174445 useless extension candidates. Maximal degree in co-relation 946521. Up to 43024 conditions per place. [2023-08-30 20:19:03,134 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 1557 selfloop transitions, 457 changer transitions 36/2058 dead transitions. [2023-08-30 20:19:03,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 2058 transitions, 32989 flow [2023-08-30 20:19:03,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 20:19:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 20:19:03,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2313 transitions. [2023-08-30 20:19:03,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195417789757413 [2023-08-30 20:19:03,138 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2313 transitions. [2023-08-30 20:19:03,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2313 transitions. [2023-08-30 20:19:03,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:19:03,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2313 transitions. [2023-08-30 20:19:03,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 110.14285714285714) internal successors, (2313), 21 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:19:03,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 212.0) internal successors, (4664), 22 states have internal predecessors, (4664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:19:03,145 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 212.0) internal successors, (4664), 22 states have internal predecessors, (4664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:19:03,145 INFO L175 Difference]: Start difference. First operand has 227 places, 708 transitions, 11108 flow. Second operand 21 states and 2313 transitions. [2023-08-30 20:19:03,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 2058 transitions, 32989 flow [2023-08-30 20:19:43,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 2058 transitions, 32333 flow, removed 255 selfloop flow, removed 10 redundant places. [2023-08-30 20:19:43,684 INFO L231 Difference]: Finished difference. Result has 246 places, 890 transitions, 15693 flow [2023-08-30 20:19:43,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=10582, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=15693, PETRI_PLACES=246, PETRI_TRANSITIONS=890} [2023-08-30 20:19:43,685 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 208 predicate places. [2023-08-30 20:19:43,685 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 890 transitions, 15693 flow [2023-08-30 20:19:43,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 100.0) internal successors, (1300), 13 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:19:43,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:19:43,685 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, 1, 1, 1, 1, 1] [2023-08-30 20:19:43,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 20:19:43,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:19:43,890 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 20:19:43,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:19:43,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1656990560, now seen corresponding path program 12 times [2023-08-30 20:19:43,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:19:43,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19480640] [2023-08-30 20:19:43,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:19:43,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:19:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:19:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:19:43,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:19:43,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19480640] [2023-08-30 20:19:43,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19480640] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:19:43,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270638256] [2023-08-30 20:19:43,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:19:43,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:19:43,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:19:43,941 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) [2023-08-30 20:19:43,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 20:19:44,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:19:44,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:19:44,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:19:44,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:19:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:19:44,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:19:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:19:44,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270638256] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:19:44,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:19:44,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-30 20:19:44,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792360250] [2023-08-30 20:19:44,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:19:44,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 20:19:44,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:19:44,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 20:19:44,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-30 20:19:44,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-30 20:19:44,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 890 transitions, 15693 flow. Second operand has 13 states, 13 states have (on average 99.84615384615384) internal successors, (1298), 13 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:19:44,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:19:44,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-30 20:19:44,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:20:20,579 INFO L130 PetriNetUnfolder]: 119992/168155 cut-off events. [2023-08-30 20:20:20,579 INFO L131 PetriNetUnfolder]: For 3573220/3640633 co-relation queries the response was YES. [2023-08-30 20:20:23,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1238812 conditions, 168155 events. 119992/168155 cut-off events. For 3573220/3640633 co-relation queries the response was YES. Maximal size of possible extension queue 7694. Compared 1278622 event pairs, 24151 based on Foata normal form. 30719/198701 useless extension candidates. Maximal degree in co-relation 1204497. Up to 59696 conditions per place. [2023-08-30 20:20:24,475 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 1085 selfloop transitions, 623 changer transitions 0/1716 dead transitions. [2023-08-30 20:20:24,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1716 transitions, 30098 flow [2023-08-30 20:20:24,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 20:20:24,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 20:20:24,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1681 transitions. [2023-08-30 20:20:24,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5286163522012579 [2023-08-30 20:20:24,477 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1681 transitions. [2023-08-30 20:20:24,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1681 transitions. [2023-08-30 20:20:24,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:20:24,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1681 transitions. [2023-08-30 20:20:24,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 112.06666666666666) internal successors, (1681), 15 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:24,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 212.0) internal successors, (3392), 16 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:24,481 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 212.0) internal successors, (3392), 16 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:20:24,481 INFO L175 Difference]: Start difference. First operand has 246 places, 890 transitions, 15693 flow. Second operand 15 states and 1681 transitions. [2023-08-30 20:20:24,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1716 transitions, 30098 flow [2023-08-30 20:22:16,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 1716 transitions, 29389 flow, removed 323 selfloop flow, removed 5 redundant places. [2023-08-30 20:22:16,812 INFO L231 Difference]: Finished difference. Result has 260 places, 1048 transitions, 20168 flow [2023-08-30 20:22:16,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=14976, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=460, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=20168, PETRI_PLACES=260, PETRI_TRANSITIONS=1048} [2023-08-30 20:22:16,813 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 222 predicate places. [2023-08-30 20:22:16,813 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 1048 transitions, 20168 flow [2023-08-30 20:22:16,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 99.84615384615384) internal successors, (1298), 13 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:16,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:22:16,814 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, 1, 1, 1, 1, 1] [2023-08-30 20:22:16,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 20:22:17,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:17,017 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 20:22:17,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:22:17,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1096448224, now seen corresponding path program 13 times [2023-08-30 20:22:17,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:22:17,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717067488] [2023-08-30 20:22:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:22:17,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:22:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:17,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:22:17,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717067488] [2023-08-30 20:22:17,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717067488] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:22:17,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866629178] [2023-08-30 20:22:17,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:22:17,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:22:17,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:22:17,086 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) [2023-08-30 20:22:17,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 20:22:17,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:22:17,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:22:17,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:22:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:17,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:22:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:22:17,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866629178] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:22:17,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:22:17,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 20:22:17,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497967276] [2023-08-30 20:22:17,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:22:17,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 20:22:17,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:22:17,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 20:22:17,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:22:17,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-30 20:22:17,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 1048 transitions, 20168 flow. Second operand has 15 states, 15 states have (on average 99.53333333333333) internal successors, (1493), 15 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:22:17,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:22:17,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-30 20:22:17,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:22:57,133 INFO L130 PetriNetUnfolder]: 124412/173892 cut-off events. [2023-08-30 20:22:57,134 INFO L131 PetriNetUnfolder]: For 3825811/3897963 co-relation queries the response was YES. [2023-08-30 20:23:00,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1327469 conditions, 173892 events. 124412/173892 cut-off events. For 3825811/3897963 co-relation queries the response was YES. Maximal size of possible extension queue 8165. Compared 1334616 event pairs, 8101 based on Foata normal form. 31835/205628 useless extension candidates. Maximal degree in co-relation 1312148. Up to 53618 conditions per place. [2023-08-30 20:23:00,936 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 1611 selfloop transitions, 523 changer transitions 81/2223 dead transitions. [2023-08-30 20:23:00,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 2223 transitions, 39683 flow [2023-08-30 20:23:00,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 20:23:00,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 20:23:00,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2515 transitions. [2023-08-30 20:23:00,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515791632485644 [2023-08-30 20:23:00,944 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2515 transitions. [2023-08-30 20:23:00,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2515 transitions. [2023-08-30 20:23:00,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:23:00,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2515 transitions. [2023-08-30 20:23:00,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 109.34782608695652) internal successors, (2515), 23 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:00,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 212.0) internal successors, (5088), 24 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:00,965 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 212.0) internal successors, (5088), 24 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:23:00,965 INFO L175 Difference]: Start difference. First operand has 260 places, 1048 transitions, 20168 flow. Second operand 23 states and 2515 transitions. [2023-08-30 20:23:00,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 2223 transitions, 39683 flow [2023-08-30 20:25:53,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 2223 transitions, 39010 flow, removed 199 selfloop flow, removed 9 redundant places. [2023-08-30 20:25:53,651 INFO L231 Difference]: Finished difference. Result has 280 places, 1066 transitions, 21679 flow [2023-08-30 20:25:53,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=19387, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1039, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=497, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=21679, PETRI_PLACES=280, PETRI_TRANSITIONS=1066} [2023-08-30 20:25:53,652 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 242 predicate places. [2023-08-30 20:25:53,652 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 1066 transitions, 21679 flow [2023-08-30 20:25:53,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 99.53333333333333) internal successors, (1493), 15 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:25:53,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:25:53,653 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, 1, 1, 1, 1, 1] [2023-08-30 20:25:53,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-08-30 20:25:53,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-30 20:25:53,857 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 20:25:53,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:25:53,857 INFO L85 PathProgramCache]: Analyzing trace with hash 608725755, now seen corresponding path program 14 times [2023-08-30 20:25:53,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:25:53,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8793826] [2023-08-30 20:25:53,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:25:53,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:25:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:25:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:25:53,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:25:53,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8793826] [2023-08-30 20:25:53,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8793826] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:25:53,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755909361] [2023-08-30 20:25:53,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:25:53,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:25:53,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:25:53,907 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) [2023-08-30 20:25:53,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 20:25:54,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:25:54,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:25:54,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:25:54,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:25:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:25:54,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:25:54,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:25:54,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755909361] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:25:54,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:25:54,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-30 20:25:54,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606590738] [2023-08-30 20:25:54,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:25:54,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 20:25:54,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:25:54,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 20:25:54,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-30 20:25:54,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 212 [2023-08-30 20:25:54,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 1066 transitions, 21679 flow. Second operand has 11 states, 11 states have (on average 100.27272727272727) internal successors, (1103), 11 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:25:54,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:25:54,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 212 [2023-08-30 20:25:54,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand